annotate decoders/mpglib/layer3.c @ 533:cad2940e992f stable-1.0

Updated.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 17 Apr 2008 17:55:22 +0000
parents 72efeb4643b6
children
rev   line source
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1 /*
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2 * Mpeg Layer-3 audio decoder
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3 * --------------------------
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4 * copyright (c) 1995,1996,1997 by Michael Hipp.
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5 * All rights reserved. See also 'README'
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6 */
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7
441
5b00e43ec23c Patches to make SDL_sound more Visual C happy.
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8 #include <stdio.h>
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9 #include <stdlib.h>
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10
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11 #include "SDL_sound.h"
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12
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13 #define __SDL_SOUND_INTERNAL__
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14 #include "SDL_sound_internal.h"
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15
261
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16 #include "mpg123_sdlsound.h"
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17 #include "mpglib_sdlsound.h"
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18 #include "huffman.h"
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19
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20 #define MPEG1
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21
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22 static real ispow[8207];
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23 static real aa_ca[8],aa_cs[8];
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24 static real COS1[12][6];
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25 static real win[4][36];
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26 static real win1[4][36];
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27 static real gainpow2[256+118+4];
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28 static real COS9[9];
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29 static real COS6_1,COS6_2;
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30 static real tfcos36[9];
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31 static real tfcos12[3];
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32
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33 struct bandInfoStruct {
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34 short longIdx[23];
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35 short longDiff[22];
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36 short shortIdx[14];
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37 short shortDiff[13];
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38 };
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39
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40 int longLimit[9][23];
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41 int shortLimit[9][14];
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42
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43 struct bandInfoStruct bandInfo[9] = {
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44
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45 /* MPEG 1.0 */
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46 { {0,4,8,12,16,20,24,30,36,44,52,62,74, 90,110,134,162,196,238,288,342,418,576},
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47 {4,4,4,4,4,4,6,6,8, 8,10,12,16,20,24,28,34,42,50,54, 76,158},
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48 {0,4*3,8*3,12*3,16*3,22*3,30*3,40*3,52*3,66*3, 84*3,106*3,136*3,192*3},
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49 {4,4,4,4,6,8,10,12,14,18,22,30,56} } ,
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50
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51 { {0,4,8,12,16,20,24,30,36,42,50,60,72, 88,106,128,156,190,230,276,330,384,576},
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52 {4,4,4,4,4,4,6,6,6, 8,10,12,16,18,22,28,34,40,46,54, 54,192},
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53 {0,4*3,8*3,12*3,16*3,22*3,28*3,38*3,50*3,64*3, 80*3,100*3,126*3,192*3},
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54 {4,4,4,4,6,6,10,12,14,16,20,26,66} } ,
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55
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56 { {0,4,8,12,16,20,24,30,36,44,54,66,82,102,126,156,194,240,296,364,448,550,576} ,
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57 {4,4,4,4,4,4,6,6,8,10,12,16,20,24,30,38,46,56,68,84,102, 26} ,
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58 {0,4*3,8*3,12*3,16*3,22*3,30*3,42*3,58*3,78*3,104*3,138*3,180*3,192*3} ,
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59 {4,4,4,4,6,8,12,16,20,26,34,42,12} } ,
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60
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61 /* MPEG 2.0 */
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62 { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
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63 {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 } ,
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64 {0,4*3,8*3,12*3,18*3,24*3,32*3,42*3,56*3,74*3,100*3,132*3,174*3,192*3} ,
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65 {4,4,4,6,6,8,10,14,18,26,32,42,18 } } ,
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66
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67 { {0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,330,394,464,540,576},
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68 {6,6,6,6,6,6,8,10,12,14,16,18,22,26,32,38,46,52,64,70,76,36 } ,
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69 {0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,136*3,180*3,192*3} ,
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70 {4,4,4,6,8,10,12,14,18,24,32,44,12 } } ,
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71
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72 { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
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73 {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 },
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74 {0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,134*3,174*3,192*3},
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75 {4,4,4,6,8,10,12,14,18,24,30,40,18 } } ,
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76 /* MPEG 2.5 */
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77 { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} ,
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78 {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54},
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79 {0,12,24,36,54,78,108,144,186,240,312,402,522,576},
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80 {4,4,4,6,8,10,12,14,18,24,30,40,18} },
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81 { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} ,
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82 {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54},
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83 {0,12,24,36,54,78,108,144,186,240,312,402,522,576},
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84 {4,4,4,6,8,10,12,14,18,24,30,40,18} },
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85 { {0,12,24,36,48,60,72,88,108,132,160,192,232,280,336,400,476,566,568,570,572,574,576},
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86 {12,12,12,12,12,12,16,20,24,28,32,40,48,56,64,76,90,2,2,2,2,2},
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87 {0, 24, 48, 72,108,156,216,288,372,480,486,492,498,576},
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88 {8,8,8,12,16,20,24,28,36,2,2,2,26} } ,
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89 };
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90
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91 static int mapbuf0[9][152];
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92 static int mapbuf1[9][156];
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93 static int mapbuf2[9][44];
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94 static int *map[9][3];
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95 static int *mapend[9][3];
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96
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97 static unsigned int n_slen2[512]; /* MPEG 2.0 slen for 'normal' mode */
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98 static unsigned int i_slen2[256]; /* MPEG 2.0 slen for intensity stereo */
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99
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100 static real tan1_1[16],tan2_1[16],tan1_2[16],tan2_2[16];
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101 static real pow1_1[2][16],pow2_1[2][16],pow1_2[2][16],pow2_2[2][16];
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102
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103 /*
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104 * init tables for layer-3
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105 */
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106 void init_layer3(int down_sample_sblimit)
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107 {
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108 int i,j,k,l;
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109
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110 for(i=-256;i<118+4;i++)
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111 gainpow2[i+256] = pow((double)2.0,-0.25 * (double) (i+210) );
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112
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113 for(i=0;i<8207;i++)
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114 ispow[i] = pow((double)i,(double)4.0/3.0);
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115
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116 for (i=0;i<8;i++)
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117 {
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118 static double Ci[8]={-0.6,-0.535,-0.33,-0.185,-0.095,-0.041,-0.0142,-0.0037};
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119 double sq=sqrt(1.0+Ci[i]*Ci[i]);
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120 aa_cs[i] = 1.0/sq;
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121 aa_ca[i] = Ci[i]/sq;
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122 }
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123
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124 for(i=0;i<18;i++)
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125 {
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126 win[0][i] = win[1][i] = 0.5 * sin( M_PI / 72.0 * (double) (2*(i+0) +1) ) / cos ( M_PI * (double) (2*(i+0) +19) / 72.0 );
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127 win[0][i+18] = win[3][i+18] = 0.5 * sin( M_PI / 72.0 * (double) (2*(i+18)+1) ) / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 );
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128 }
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129 for(i=0;i<6;i++)
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130 {
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131 win[1][i+18] = 0.5 / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 );
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132 win[3][i+12] = 0.5 / cos ( M_PI * (double) (2*(i+12)+19) / 72.0 );
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133 win[1][i+24] = 0.5 * sin( M_PI / 24.0 * (double) (2*i+13) ) / cos ( M_PI * (double) (2*(i+24)+19) / 72.0 );
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
134 win[1][i+30] = win[3][i] = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
135 win[3][i+6 ] = 0.5 * sin( M_PI / 24.0 * (double) (2*i+1) ) / cos ( M_PI * (double) (2*(i+6 )+19) / 72.0 );
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
136 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
137
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
138 for(i=0;i<9;i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
139 COS9[i] = cos( M_PI / 18.0 * (double) i);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
140
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
141 for(i=0;i<9;i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
142 tfcos36[i] = 0.5 / cos ( M_PI * (double) (i*2+1) / 36.0 );
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
143 for(i=0;i<3;i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
144 tfcos12[i] = 0.5 / cos ( M_PI * (double) (i*2+1) / 12.0 );
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
145
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
146 COS6_1 = cos( M_PI / 6.0 * (double) 1);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
147 COS6_2 = cos( M_PI / 6.0 * (double) 2);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
148
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
149 for(i=0;i<12;i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
150 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
151 win[2][i] = 0.5 * sin( M_PI / 24.0 * (double) (2*i+1) ) / cos ( M_PI * (double) (2*i+7) / 24.0 );
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
152 for(j=0;j<6;j++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
153 COS1[i][j] = cos( M_PI / 24.0 * (double) ((2*i+7)*(2*j+1)) );
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
154 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
155
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
156 for(j=0;j<4;j++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
157 static int len[4] = { 36,36,12,36 };
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
158 for(i=0;i<len[j];i+=2)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
159 win1[j][i] = + win[j][i];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
160 for(i=1;i<len[j];i+=2)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
161 win1[j][i] = - win[j][i];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
162 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
163
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
164 for(i=0;i<16;i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
165 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
166 double t = tan( (double) i * M_PI / 12.0 );
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
167 tan1_1[i] = t / (1.0+t);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
168 tan2_1[i] = 1.0 / (1.0 + t);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
169 tan1_2[i] = M_SQRT2 * t / (1.0+t);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
170 tan2_2[i] = M_SQRT2 / (1.0 + t);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
171
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
172 for(j=0;j<2;j++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
173 double base = pow(2.0,-0.25*(j+1.0));
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
174 double p1=1.0,p2=1.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
175 if(i > 0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
176 if( i & 1 )
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
177 p1 = pow(base,(i+1.0)*0.5);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
178 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
179 p2 = pow(base,i*0.5);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
180 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
181 pow1_1[j][i] = p1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
182 pow2_1[j][i] = p2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
183 pow1_2[j][i] = M_SQRT2 * p1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
184 pow2_2[j][i] = M_SQRT2 * p2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
185 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
186 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
187
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
188 for(j=0;j<9;j++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
189 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
190 struct bandInfoStruct *bi = &bandInfo[j];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
191 int *mp;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
192 int cb,lwin;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
193 short *bdf;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
194
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
195 mp = map[j][0] = mapbuf0[j];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
196 bdf = bi->longDiff;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
197 for(i=0,cb = 0; cb < 8 ; cb++,i+=*bdf++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
198 *mp++ = (*bdf) >> 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
199 *mp++ = i;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
200 *mp++ = 3;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
201 *mp++ = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
202 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
203 bdf = bi->shortDiff+3;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
204 for(cb=3;cb<13;cb++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
205 int l = (*bdf++) >> 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
206 for(lwin=0;lwin<3;lwin++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
207 *mp++ = l;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
208 *mp++ = i + lwin;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
209 *mp++ = lwin;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
210 *mp++ = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
211 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
212 i += 6*l;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
213 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
214 mapend[j][0] = mp;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
215
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
216 mp = map[j][1] = mapbuf1[j];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
217 bdf = bi->shortDiff+0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
218 for(i=0,cb=0;cb<13;cb++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
219 int l = (*bdf++) >> 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
220 for(lwin=0;lwin<3;lwin++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
221 *mp++ = l;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
222 *mp++ = i + lwin;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
223 *mp++ = lwin;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
224 *mp++ = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
225 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
226 i += 6*l;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
227 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
228 mapend[j][1] = mp;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
229
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
230 mp = map[j][2] = mapbuf2[j];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
231 bdf = bi->longDiff;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
232 for(cb = 0; cb < 22 ; cb++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
233 *mp++ = (*bdf++) >> 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
234 *mp++ = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
235 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
236 mapend[j][2] = mp;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
237
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
238 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
239
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
240 for(j=0;j<9;j++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
241 for(i=0;i<23;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
242 longLimit[j][i] = (bandInfo[j].longIdx[i] - 1 + 8) / 18 + 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
243 if(longLimit[j][i] > (down_sample_sblimit) )
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
244 longLimit[j][i] = down_sample_sblimit;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
245 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
246 for(i=0;i<14;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
247 shortLimit[j][i] = (bandInfo[j].shortIdx[i] - 1) / 18 + 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
248 if(shortLimit[j][i] > (down_sample_sblimit) )
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
249 shortLimit[j][i] = down_sample_sblimit;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
250 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
251 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
252
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
253 for(i=0;i<5;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
254 for(j=0;j<6;j++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
255 for(k=0;k<6;k++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
256 int n = k + j * 6 + i * 36;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
257 i_slen2[n] = i|(j<<3)|(k<<6)|(3<<12);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
258 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
259 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
260 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
261 for(i=0;i<4;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
262 for(j=0;j<4;j++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
263 for(k=0;k<4;k++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
264 int n = k + j * 4 + i * 16;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
265 i_slen2[n+180] = i|(j<<3)|(k<<6)|(4<<12);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
266 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
267 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
268 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
269 for(i=0;i<4;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
270 for(j=0;j<3;j++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
271 int n = j + i * 3;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
272 i_slen2[n+244] = i|(j<<3) | (5<<12);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
273 n_slen2[n+500] = i|(j<<3) | (2<<12) | (1<<15);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
274 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
275 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
276
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
277 for(i=0;i<5;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
278 for(j=0;j<5;j++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
279 for(k=0;k<4;k++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
280 for(l=0;l<4;l++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
281 int n = l + k * 4 + j * 16 + i * 80;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
282 n_slen2[n] = i|(j<<3)|(k<<6)|(l<<9)|(0<<12);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
283 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
284 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
285 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
286 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
287 for(i=0;i<5;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
288 for(j=0;j<5;j++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
289 for(k=0;k<4;k++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
290 int n = k + j * 4 + i * 20;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
291 n_slen2[n+400] = i|(j<<3)|(k<<6)|(1<<12);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
292 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
293 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
294 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
295 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
296
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
297 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
298 * read additional side information
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
299 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
300 #ifdef MPEG1
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
301 static int III_get_side_info_1(struct III_sideinfo *si,int stereo,
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
302 int ms_stereo,long sfreq,int single)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
303 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
304 int ch, gr;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
305 int powdiff = (single == 3) ? 4 : 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
306
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
307 si->main_data_begin = getbits(9);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
308 if (stereo == 1)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
309 si->private_bits = getbits_fast(5);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
310 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
311 si->private_bits = getbits_fast(3);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
312
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
313 for (ch=0; ch<stereo; ch++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
314 si->ch[ch].gr[0].scfsi = -1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
315 si->ch[ch].gr[1].scfsi = getbits_fast(4);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
316 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
317
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
318 for (gr=0; gr<2; gr++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
319 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
320 for (ch=0; ch<stereo; ch++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
321 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
322 register struct gr_info_s *gr_info = &(si->ch[ch].gr[gr]);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
323
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
324 gr_info->part2_3_length = getbits(12);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
325 gr_info->big_values = getbits_fast(9);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
326 if(gr_info->big_values > 288) {
299
7b1df7526915 Patches for Visual C compatibility.
Ryan C. Gordon <icculus@icculus.org>
parents: 281
diff changeset
327 SNDDBG(("MPGLIB: big_values too large!\n"));
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
328 gr_info->big_values = 288;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
329 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
330 gr_info->pow2gain = gainpow2+256 - getbits_fast(8) + powdiff;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
331 if(ms_stereo)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
332 gr_info->pow2gain += 2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
333 gr_info->scalefac_compress = getbits_fast(4);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
334 /* window-switching flag == 1 for block_Type != 0 .. and block-type == 0 -> win-sw-flag = 0 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
335 if(get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
336 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
337 int i;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
338 gr_info->block_type = getbits_fast(2);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
339 gr_info->mixed_block_flag = get1bit();
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
340 gr_info->table_select[0] = getbits_fast(5);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
341 gr_info->table_select[1] = getbits_fast(5);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
342 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
343 * table_select[2] not needed, because there is no region2,
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
344 * but to satisfy some verifications tools we set it either.
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
345 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
346 gr_info->table_select[2] = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
347 for(i=0;i<3;i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
348 gr_info->full_gain[i] = gr_info->pow2gain + (getbits_fast(3)<<3);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
349
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
350 if(gr_info->block_type == 0) {
387
fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
Ryan C. Gordon <icculus@icculus.org>
parents: 299
diff changeset
351 BAIL_MACRO("MPGLIB: Blocktype == 0 and window-switching == 1 not allowed.", 0);
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
352 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
353 /* region_count/start parameters are implicit in this case. */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
354 gr_info->region1start = 36>>1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
355 gr_info->region2start = 576>>1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
356 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
357 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
358 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
359 int i,r0c,r1c;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
360 for (i=0; i<3; i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
361 gr_info->table_select[i] = getbits_fast(5);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
362 r0c = getbits_fast(4);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
363 r1c = getbits_fast(3);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
364 gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
365 gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
366 gr_info->block_type = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
367 gr_info->mixed_block_flag = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
368 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
369 gr_info->preflag = get1bit();
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
370 gr_info->scalefac_scale = get1bit();
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
371 gr_info->count1table_select = get1bit();
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
372 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
373 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
374 return !0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
375 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
376 #endif
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
377
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
378 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
379 * Side Info for MPEG 2.0 / LSF
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
380 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
381 static int III_get_side_info_2(struct III_sideinfo *si,int stereo,
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
382 int ms_stereo,long sfreq,int single)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
383 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
384 int ch;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
385 int powdiff = (single == 3) ? 4 : 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
386
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
387 si->main_data_begin = getbits(8);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
388 if (stereo == 1)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
389 si->private_bits = get1bit();
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
390 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
391 si->private_bits = getbits_fast(2);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
392
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
393 for (ch=0; ch<stereo; ch++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
394 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
395 register struct gr_info_s *gr_info = &(si->ch[ch].gr[0]);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
396
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
397 gr_info->part2_3_length = getbits(12);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
398 gr_info->big_values = getbits_fast(9);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
399 if(gr_info->big_values > 288) {
299
7b1df7526915 Patches for Visual C compatibility.
Ryan C. Gordon <icculus@icculus.org>
parents: 281
diff changeset
400 SNDDBG(("MPGLIB: big_values too large!\n"));
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
401 gr_info->big_values = 288;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
402 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
403 gr_info->pow2gain = gainpow2+256 - getbits_fast(8) + powdiff;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
404 if(ms_stereo)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
405 gr_info->pow2gain += 2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
406 gr_info->scalefac_compress = getbits(9);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
407 /* window-switching flag == 1 for block_Type != 0 .. and block-type == 0 -> win-sw-flag = 0 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
408 if(get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
409 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
410 int i;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
411 gr_info->block_type = getbits_fast(2);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
412 gr_info->mixed_block_flag = get1bit();
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
413 gr_info->table_select[0] = getbits_fast(5);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
414 gr_info->table_select[1] = getbits_fast(5);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
415 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
416 * table_select[2] not needed, because there is no region2,
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
417 * but to satisfy some verifications tools we set it either.
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
418 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
419 gr_info->table_select[2] = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
420 for(i=0;i<3;i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
421 gr_info->full_gain[i] = gr_info->pow2gain + (getbits_fast(3)<<3);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
422
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
423 if(gr_info->block_type == 0) {
387
fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
Ryan C. Gordon <icculus@icculus.org>
parents: 299
diff changeset
424 BAIL_MACRO("MPGLIB: Blocktype == 0 and window-switching == 1 not allowed.", 0);
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
425 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
426 /* region_count/start parameters are implicit in this case. */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
427 /* check this again! */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
428 if(gr_info->block_type == 2)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
429 gr_info->region1start = 36>>1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
430 else if(sfreq == 8)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
431 /* check this for 2.5 and sfreq=8 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
432 gr_info->region1start = 108>>1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
433 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
434 gr_info->region1start = 54>>1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
435 gr_info->region2start = 576>>1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
436 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
437 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
438 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
439 int i,r0c,r1c;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
440 for (i=0; i<3; i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
441 gr_info->table_select[i] = getbits_fast(5);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
442 r0c = getbits_fast(4);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
443 r1c = getbits_fast(3);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
444 gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
445 gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
446 gr_info->block_type = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
447 gr_info->mixed_block_flag = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
448 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
449 gr_info->scalefac_scale = get1bit();
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
450 gr_info->count1table_select = get1bit();
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
451 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
452 return !0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
453 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
454
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
455 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
456 * read scalefactors
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
457 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
458 #ifdef MPEG1
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
459 static int III_get_scale_factors_1(int *scf,struct gr_info_s *gr_info)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
460 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
461 static const unsigned char slen[2][16] = {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
462 {0, 0, 0, 0, 3, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4},
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
463 {0, 1, 2, 3, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 2, 3}
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
464 };
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
465 int numbits;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
466 int num0 = slen[0][gr_info->scalefac_compress];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
467 int num1 = slen[1][gr_info->scalefac_compress];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
468
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
469 if (gr_info->block_type == 2) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
470 int i=18;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
471 numbits = (num0 + num1) * 18;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
472
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
473 if (gr_info->mixed_block_flag) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
474 for (i=8;i;i--)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
475 *scf++ = getbits_fast(num0);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
476 i = 9;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
477 numbits -= num0; /* num0 * 17 + num1 * 18 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
478 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
479
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
480 for (;i;i--)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
481 *scf++ = getbits_fast(num0);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
482 for (i = 18; i; i--)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
483 *scf++ = getbits_fast(num1);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
484 *scf++ = 0; *scf++ = 0; *scf++ = 0; /* short[13][0..2] = 0 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
485 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
486 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
487 int i;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
488 int scfsi = gr_info->scfsi;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
489
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
490 if(scfsi < 0) { /* scfsi < 0 => granule == 0 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
491 for(i=11;i;i--)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
492 *scf++ = getbits_fast(num0);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
493 for(i=10;i;i--)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
494 *scf++ = getbits_fast(num1);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
495 numbits = (num0 + num1) * 10 + num0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
496 *scf++ = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
497 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
498 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
499 numbits = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
500 if(!(scfsi & 0x8)) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
501 for (i=0;i<6;i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
502 *scf++ = getbits_fast(num0);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
503 numbits += num0 * 6;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
504 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
505 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
506 scf += 6;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
507 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
508
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
509 if(!(scfsi & 0x4)) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
510 for (i=0;i<5;i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
511 *scf++ = getbits_fast(num0);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
512 numbits += num0 * 5;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
513 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
514 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
515 scf += 5;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
516 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
517
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
518 if(!(scfsi & 0x2)) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
519 for(i=0;i<5;i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
520 *scf++ = getbits_fast(num1);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
521 numbits += num1 * 5;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
522 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
523 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
524 scf += 5;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
525 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
526
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
527 if(!(scfsi & 0x1)) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
528 for (i=0;i<5;i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
529 *scf++ = getbits_fast(num1);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
530 numbits += num1 * 5;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
531 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
532 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
533 scf += 5;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
534 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
535 *scf++ = 0; /* no l[21] in original sources */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
536 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
537 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
538 return numbits;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
539 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
540 #endif
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
541
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
542
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
543 static int III_get_scale_factors_2(int *scf,struct gr_info_s *gr_info,int i_stereo)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
544 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
545 unsigned char *pnt;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
546 int i,j;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
547 unsigned int slen;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
548 int n = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
549 int numbits = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
550
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
551 static unsigned char stab[3][6][4] = {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
552 { { 6, 5, 5,5 } , { 6, 5, 7,3 } , { 11,10,0,0} ,
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
553 { 7, 7, 7,0 } , { 6, 6, 6,3 } , { 8, 8,5,0} } ,
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
554 { { 9, 9, 9,9 } , { 9, 9,12,6 } , { 18,18,0,0} ,
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
555 {12,12,12,0 } , {12, 9, 9,6 } , { 15,12,9,0} } ,
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
556 { { 6, 9, 9,9 } , { 6, 9,12,6 } , { 15,18,0,0} ,
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
557 { 6,15,12,0 } , { 6,12, 9,6 } , { 6,18,9,0} } };
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
558
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
559 if(i_stereo) /* i_stereo AND second channel -> do_layer3() checks this */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
560 slen = i_slen2[gr_info->scalefac_compress>>1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
561 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
562 slen = n_slen2[gr_info->scalefac_compress];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
563
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
564 gr_info->preflag = (slen>>15) & 0x1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
565
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
566 n = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
567 if( gr_info->block_type == 2 ) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
568 n++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
569 if(gr_info->mixed_block_flag)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
570 n++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
571 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
572
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
573 pnt = stab[n][(slen>>12)&0x7];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
574
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
575 for(i=0;i<4;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
576 int num = slen & 0x7;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
577 slen >>= 3;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
578 if(num) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
579 for(j=0;j<(int)(pnt[i]);j++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
580 *scf++ = getbits_fast(num);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
581 numbits += pnt[i] * num;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
582 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
583 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
584 for(j=0;j<(int)(pnt[i]);j++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
585 *scf++ = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
586 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
587 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
588
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
589 n = (n << 1) + 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
590 for(i=0;i<n;i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
591 *scf++ = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
592
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
593 return numbits;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
594 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
595
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
596 static int pretab1[22] = {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,3,3,3,2,0};
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
597 static int pretab2[22] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
598
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
599 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
600 * don't forget to apply the same changes to III_dequantize_sample_ms() !!!
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
601 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
602 static int III_dequantize_sample(real xr[SBLIMIT][SSLIMIT],int *scf,
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
603 struct gr_info_s *gr_info,int sfreq,int part2bits)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
604 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
605 int shift = 1 + gr_info->scalefac_scale;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
606 real *xrpnt = (real *) xr;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
607 int l[3],l3;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
608 int part2remain = gr_info->part2_3_length - part2bits;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
609 int *me;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
610
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
611 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
612 int bv = gr_info->big_values;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
613 int region1 = gr_info->region1start;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
614 int region2 = gr_info->region2start;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
615
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
616 l3 = ((576>>1)-bv)>>1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
617 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
618 * we may lose the 'odd' bit here !!
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
619 * check this later again
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
620 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
621 if(bv <= region1) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
622 l[0] = bv; l[1] = 0; l[2] = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
623 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
624 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
625 l[0] = region1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
626 if(bv <= region2) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
627 l[1] = bv - l[0]; l[2] = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
628 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
629 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
630 l[1] = region2 - l[0]; l[2] = bv - region2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
631 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
632 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
633 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
634
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
635 if(gr_info->block_type == 2) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
636 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
637 * decoding with short or mixed mode BandIndex table
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
638 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
639 int i,max[4];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
640 int step=0,lwin=0,cb=0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
641 register real v = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
642 register int *m,mc;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
643
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
644 if(gr_info->mixed_block_flag) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
645 max[3] = -1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
646 max[0] = max[1] = max[2] = 2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
647 m = map[sfreq][0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
648 me = mapend[sfreq][0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
649 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
650 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
651 max[0] = max[1] = max[2] = max[3] = -1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
652 /* max[3] not really needed in this case */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
653 m = map[sfreq][1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
654 me = mapend[sfreq][1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
655 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
656
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
657 mc = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
658 for(i=0;i<2;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
659 int lp = l[i];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
660 struct newhuff *h = ht+gr_info->table_select[i];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
661 for(;lp;lp--,mc--) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
662 register int x,y;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
663 if( (!mc) ) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
664 mc = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
665 xrpnt = ((real *) xr) + (*m++);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
666 lwin = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
667 cb = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
668 if(lwin == 3) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
669 v = gr_info->pow2gain[(*scf++) << shift];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
670 step = 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
671 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
672 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
673 v = gr_info->full_gain[lwin][(*scf++) << shift];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
674 step = 3;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
675 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
676 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
677 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
678 register short *val = h->table;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
679 while((y=*val++)<0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
680 if (get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
681 val -= y;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
682 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
683 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
684 x = y >> 4;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
685 y &= 0xf;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
686 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
687 if(x == 15) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
688 max[lwin] = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
689 part2remain -= h->linbits+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
690 x += getbits(h->linbits);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
691 if(get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
692 *xrpnt = -ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
693 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
694 *xrpnt = ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
695 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
696 else if(x) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
697 max[lwin] = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
698 if(get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
699 *xrpnt = -ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
700 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
701 *xrpnt = ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
702 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
703 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
704 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
705 *xrpnt = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
706 xrpnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
707 if(y == 15) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
708 max[lwin] = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
709 part2remain -= h->linbits+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
710 y += getbits(h->linbits);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
711 if(get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
712 *xrpnt = -ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
713 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
714 *xrpnt = ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
715 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
716 else if(y) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
717 max[lwin] = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
718 if(get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
719 *xrpnt = -ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
720 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
721 *xrpnt = ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
722 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
723 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
724 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
725 *xrpnt = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
726 xrpnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
727 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
728 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
729 for(;l3 && (part2remain > 0);l3--) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
730 struct newhuff *h = htc+gr_info->count1table_select;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
731 register short *val = h->table,a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
732
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
733 while((a=*val++)<0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
734 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
735 if(part2remain < 0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
736 part2remain++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
737 a = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
738 break;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
739 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
740 if (get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
741 val -= a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
742 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
743
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
744 for(i=0;i<4;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
745 if(!(i & 1)) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
746 if(!mc) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
747 mc = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
748 xrpnt = ((real *) xr) + (*m++);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
749 lwin = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
750 cb = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
751 if(lwin == 3) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
752 v = gr_info->pow2gain[(*scf++) << shift];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
753 step = 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
754 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
755 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
756 v = gr_info->full_gain[lwin][(*scf++) << shift];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
757 step = 3;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
758 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
759 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
760 mc--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
761 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
762 if( (a & (0x8>>i)) ) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
763 max[lwin] = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
764 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
765 if(part2remain < 0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
766 part2remain++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
767 break;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
768 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
769 if(get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
770 *xrpnt = -v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
771 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
772 *xrpnt = v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
773 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
774 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
775 *xrpnt = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
776 xrpnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
777 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
778 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
779
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
780 while( m < me ) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
781 if(!mc) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
782 mc = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
783 xrpnt = ((real *) xr) + *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
784 if( (*m++) == 3)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
785 step = 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
786 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
787 step = 3;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
788 m++; /* cb */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
789 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
790 mc--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
791 *xrpnt = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
792 xrpnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
793 *xrpnt = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
794 xrpnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
795 /* we could add a little opt. here:
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
796 * if we finished a band for window 3 or a long band
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
797 * further bands could copied in a simple loop without a
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
798 * special 'map' decoding
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
799 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
800 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
801
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
802 gr_info->maxband[0] = max[0]+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
803 gr_info->maxband[1] = max[1]+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
804 gr_info->maxband[2] = max[2]+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
805 gr_info->maxbandl = max[3]+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
806
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
807 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
808 int rmax = max[0] > max[1] ? max[0] : max[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
809 rmax = (rmax > max[2] ? rmax : max[2]) + 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
810 gr_info->maxb = rmax ? shortLimit[sfreq][rmax] : longLimit[sfreq][max[3]+1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
811 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
812
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
813 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
814 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
815 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
816 * decoding with 'long' BandIndex table (block_type != 2)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
817 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
818 int *pretab = gr_info->preflag ? pretab1 : pretab2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
819 int i,max = -1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
820 int cb = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
821 register int *m = map[sfreq][2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
822 register real v = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
823 register int mc = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
824 #if 0
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
825 me = mapend[sfreq][2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
826 #endif
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
827
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
828 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
829 * long hash table values
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
830 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
831 for(i=0;i<3;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
832 int lp = l[i];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
833 struct newhuff *h = ht+gr_info->table_select[i];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
834
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
835 for(;lp;lp--,mc--) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
836 int x,y;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
837
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
838 if(!mc) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
839 mc = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
840 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
841 cb = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
842 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
843 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
844 register short *val = h->table;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
845 while((y=*val++)<0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
846 if (get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
847 val -= y;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
848 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
849 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
850 x = y >> 4;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
851 y &= 0xf;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
852 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
853 if (x == 15) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
854 max = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
855 part2remain -= h->linbits+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
856 x += getbits(h->linbits);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
857 if(get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
858 *xrpnt++ = -ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
859 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
860 *xrpnt++ = ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
861 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
862 else if(x) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
863 max = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
864 if(get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
865 *xrpnt++ = -ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
866 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
867 *xrpnt++ = ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
868 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
869 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
870 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
871 *xrpnt++ = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
872
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
873 if (y == 15) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
874 max = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
875 part2remain -= h->linbits+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
876 y += getbits(h->linbits);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
877 if(get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
878 *xrpnt++ = -ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
879 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
880 *xrpnt++ = ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
881 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
882 else if(y) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
883 max = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
884 if(get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
885 *xrpnt++ = -ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
886 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
887 *xrpnt++ = ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
888 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
889 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
890 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
891 *xrpnt++ = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
892 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
893 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
894
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
895 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
896 * short (count1table) values
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
897 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
898 for(;l3 && (part2remain > 0);l3--) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
899 struct newhuff *h = htc+gr_info->count1table_select;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
900 register short *val = h->table,a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
901
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
902 while((a=*val++)<0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
903 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
904 if(part2remain < 0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
905 part2remain++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
906 a = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
907 break;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
908 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
909 if (get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
910 val -= a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
911 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
912
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
913 for(i=0;i<4;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
914 if(!(i & 1)) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
915 if(!mc) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
916 mc = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
917 cb = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
918 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
919 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
920 mc--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
921 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
922 if ( (a & (0x8>>i)) ) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
923 max = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
924 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
925 if(part2remain < 0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
926 part2remain++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
927 break;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
928 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
929 if(get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
930 *xrpnt++ = -v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
931 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
932 *xrpnt++ = v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
933 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
934 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
935 *xrpnt++ = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
936 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
937 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
938
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
939 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
940 * zero part
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
941 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
942 for(i=(&xr[SBLIMIT][0]-xrpnt)>>1;i;i--) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
943 *xrpnt++ = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
944 *xrpnt++ = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
945 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
946
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
947 gr_info->maxbandl = max+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
948 gr_info->maxb = longLimit[sfreq][gr_info->maxbandl];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
949 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
950
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
951 while( part2remain > 16 ) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
952 getbits(16); /* Dismiss stuffing Bits */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
953 part2remain -= 16;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
954 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
955 if(part2remain > 0)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
956 getbits(part2remain);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
957 else if(part2remain < 0) {
400
9d0b5ec9cc26 FIXME cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
958 char err[128];
9d0b5ec9cc26 FIXME cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
959 snprintf(err, sizeof (err),
9d0b5ec9cc26 FIXME cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
960 "MPGLIB: Can't rewind stream by %d bits!",
9d0b5ec9cc26 FIXME cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
961 -part2remain);
9d0b5ec9cc26 FIXME cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
962 BAIL_MACRO(err, 1); /* -> error */
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
963 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
964 return 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
965 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
966
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
967 #if 0
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
968 static int III_dequantize_sample_ms(real xr[2][SBLIMIT][SSLIMIT],int *scf,
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
969 struct gr_info_s *gr_info,int sfreq,int part2bits)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
970 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
971 int shift = 1 + gr_info->scalefac_scale;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
972 real *xrpnt = (real *) xr[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
973 real *xr0pnt = (real *) xr[0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
974 int l[3],l3;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
975 int part2remain = gr_info->part2_3_length - part2bits;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
976 int *me;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
977
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
978 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
979 int bv = gr_info->big_values;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
980 int region1 = gr_info->region1start;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
981 int region2 = gr_info->region2start;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
982
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
983 l3 = ((576>>1)-bv)>>1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
984 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
985 * we may lose the 'odd' bit here !!
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
986 * check this later gain
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
987 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
988 if(bv <= region1) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
989 l[0] = bv; l[1] = 0; l[2] = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
990 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
991 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
992 l[0] = region1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
993 if(bv <= region2) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
994 l[1] = bv - l[0]; l[2] = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
995 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
996 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
997 l[1] = region2 - l[0]; l[2] = bv - region2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
998 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
999 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1000 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1001
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1002 if(gr_info->block_type == 2) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1003 int i,max[4];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1004 int step=0,lwin=0,cb=0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1005 register real v = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1006 register int *m,mc = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1007
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1008 if(gr_info->mixed_block_flag) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1009 max[3] = -1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1010 max[0] = max[1] = max[2] = 2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1011 m = map[sfreq][0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1012 me = mapend[sfreq][0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1013 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1014 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1015 max[0] = max[1] = max[2] = max[3] = -1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1016 /* max[3] not really needed in this case */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1017 m = map[sfreq][1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1018 me = mapend[sfreq][1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1019 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1020
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1021 for(i=0;i<2;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1022 int lp = l[i];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1023 struct newhuff *h = ht+gr_info->table_select[i];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1024 for(;lp;lp--,mc--) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1025 int x,y;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1026
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1027 if(!mc) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1028 mc = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1029 xrpnt = ((real *) xr[1]) + *m;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1030 xr0pnt = ((real *) xr[0]) + *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1031 lwin = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1032 cb = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1033 if(lwin == 3) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1034 v = gr_info->pow2gain[(*scf++) << shift];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1035 step = 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1036 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1037 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1038 v = gr_info->full_gain[lwin][(*scf++) << shift];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1039 step = 3;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1040 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1041 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1042 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1043 register short *val = h->table;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1044 while((y=*val++)<0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1045 if (get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1046 val -= y;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1047 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1048 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1049 x = y >> 4;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1050 y &= 0xf;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1051 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1052 if(x == 15) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1053 max[lwin] = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1054 part2remain -= h->linbits+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1055 x += getbits(h->linbits);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1056 if(get1bit()) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1057 real a = ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1058 *xrpnt = *xr0pnt + a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1059 *xr0pnt -= a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1060 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1061 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1062 real a = ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1063 *xrpnt = *xr0pnt - a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1064 *xr0pnt += a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1065 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1066 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1067 else if(x) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1068 max[lwin] = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1069 if(get1bit()) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1070 real a = ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1071 *xrpnt = *xr0pnt + a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1072 *xr0pnt -= a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1073 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1074 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1075 real a = ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1076 *xrpnt = *xr0pnt - a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1077 *xr0pnt += a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1078 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1079 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1080 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1081 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1082 *xrpnt = *xr0pnt;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1083 xrpnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1084 xr0pnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1085
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1086 if(y == 15) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1087 max[lwin] = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1088 part2remain -= h->linbits+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1089 y += getbits(h->linbits);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1090 if(get1bit()) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1091 real a = ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1092 *xrpnt = *xr0pnt + a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1093 *xr0pnt -= a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1094 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1095 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1096 real a = ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1097 *xrpnt = *xr0pnt - a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1098 *xr0pnt += a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1099 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1100 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1101 else if(y) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1102 max[lwin] = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1103 if(get1bit()) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1104 real a = ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1105 *xrpnt = *xr0pnt + a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1106 *xr0pnt -= a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1107 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1108 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1109 real a = ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1110 *xrpnt = *xr0pnt - a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1111 *xr0pnt += a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1112 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1113 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1114 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1115 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1116 *xrpnt = *xr0pnt;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1117 xrpnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1118 xr0pnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1119 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1120 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1121
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1122 for(;l3 && (part2remain > 0);l3--) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1123 struct newhuff *h = htc+gr_info->count1table_select;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1124 register short *val = h->table,a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1125
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1126 while((a=*val++)<0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1127 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1128 if(part2remain < 0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1129 part2remain++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1130 a = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1131 break;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1132 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1133 if (get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1134 val -= a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1135 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1136
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1137 for(i=0;i<4;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1138 if(!(i & 1)) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1139 if(!mc) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1140 mc = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1141 xrpnt = ((real *) xr[1]) + *m;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1142 xr0pnt = ((real *) xr[0]) + *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1143 lwin = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1144 cb = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1145 if(lwin == 3) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1146 v = gr_info->pow2gain[(*scf++) << shift];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1147 step = 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1148 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1149 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1150 v = gr_info->full_gain[lwin][(*scf++) << shift];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1151 step = 3;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1152 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1153 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1154 mc--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1155 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1156 if( (a & (0x8>>i)) ) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1157 max[lwin] = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1158 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1159 if(part2remain < 0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1160 part2remain++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1161 break;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1162 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1163 if(get1bit()) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1164 *xrpnt = *xr0pnt + v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1165 *xr0pnt -= v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1166 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1167 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1168 *xrpnt = *xr0pnt - v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1169 *xr0pnt += v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1170 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1171 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1172 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1173 *xrpnt = *xr0pnt;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1174 xrpnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1175 xr0pnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1176 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1177 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1178
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1179 while( m < me ) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1180 if(!mc) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1181 mc = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1182 xrpnt = ((real *) xr[1]) + *m;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1183 xr0pnt = ((real *) xr[0]) + *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1184 if(*m++ == 3)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1185 step = 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1186 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1187 step = 3;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1188 m++; /* cb */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1189 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1190 mc--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1191 *xrpnt = *xr0pnt;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1192 xrpnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1193 xr0pnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1194 *xrpnt = *xr0pnt;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1195 xrpnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1196 xr0pnt += step;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1197 /* we could add a little opt. here:
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1198 * if we finished a band for window 3 or a long band
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1199 * further bands could copied in a simple loop without a
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1200 * special 'map' decoding
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1201 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1202 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1203
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1204 gr_info->maxband[0] = max[0]+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1205 gr_info->maxband[1] = max[1]+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1206 gr_info->maxband[2] = max[2]+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1207 gr_info->maxbandl = max[3]+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1208
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1209 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1210 int rmax = max[0] > max[1] ? max[0] : max[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1211 rmax = (rmax > max[2] ? rmax : max[2]) + 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1212 gr_info->maxb = rmax ? shortLimit[sfreq][rmax] : longLimit[sfreq][max[3]+1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1213 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1214 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1215 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1216 int *pretab = gr_info->preflag ? pretab1 : pretab2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1217 int i,max = -1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1218 int cb = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1219 register int mc=0,*m = map[sfreq][2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1220 register real v = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1221 #if 0
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1222 me = mapend[sfreq][2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1223 #endif
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1224
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1225 for(i=0;i<3;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1226 int lp = l[i];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1227 struct newhuff *h = ht+gr_info->table_select[i];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1228
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1229 for(;lp;lp--,mc--) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1230 int x,y;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1231 if(!mc) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1232 mc = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1233 cb = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1234 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1235 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1236 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1237 register short *val = h->table;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1238 while((y=*val++)<0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1239 if (get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1240 val -= y;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1241 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1242 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1243 x = y >> 4;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1244 y &= 0xf;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1245 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1246 if (x == 15) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1247 max = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1248 part2remain -= h->linbits+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1249 x += getbits(h->linbits);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1250 if(get1bit()) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1251 real a = ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1252 *xrpnt++ = *xr0pnt + a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1253 *xr0pnt++ -= a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1254 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1255 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1256 real a = ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1257 *xrpnt++ = *xr0pnt - a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1258 *xr0pnt++ += a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1259 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1260 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1261 else if(x) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1262 max = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1263 if(get1bit()) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1264 real a = ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1265 *xrpnt++ = *xr0pnt + a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1266 *xr0pnt++ -= a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1267 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1268 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1269 real a = ispow[x] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1270 *xrpnt++ = *xr0pnt - a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1271 *xr0pnt++ += a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1272 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1273 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1274 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1275 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1276 *xrpnt++ = *xr0pnt++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1277
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1278 if (y == 15) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1279 max = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1280 part2remain -= h->linbits+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1281 y += getbits(h->linbits);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1282 if(get1bit()) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1283 real a = ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1284 *xrpnt++ = *xr0pnt + a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1285 *xr0pnt++ -= a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1286 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1287 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1288 real a = ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1289 *xrpnt++ = *xr0pnt - a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1290 *xr0pnt++ += a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1291 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1292 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1293 else if(y) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1294 max = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1295 if(get1bit()) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1296 real a = ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1297 *xrpnt++ = *xr0pnt + a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1298 *xr0pnt++ -= a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1299 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1300 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1301 real a = ispow[y] * v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1302 *xrpnt++ = *xr0pnt - a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1303 *xr0pnt++ += a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1304 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1305 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1306 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1307 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1308 *xrpnt++ = *xr0pnt++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1309 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1310 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1311
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1312 for(;l3 && (part2remain > 0);l3--) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1313 struct newhuff *h = htc+gr_info->count1table_select;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1314 register short *val = h->table,a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1315
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1316 while((a=*val++)<0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1317 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1318 if(part2remain < 0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1319 part2remain++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1320 a = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1321 break;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1322 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1323 if (get1bit())
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1324 val -= a;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1325 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1326
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1327 for(i=0;i<4;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1328 if(!(i & 1)) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1329 if(!mc) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1330 mc = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1331 cb = *m++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1332 v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1333 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1334 mc--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1335 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1336 if ( (a & (0x8>>i)) ) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1337 max = cb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1338 part2remain--;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1339 if(part2remain <= 0) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1340 part2remain++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1341 break;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1342 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1343 if(get1bit()) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1344 *xrpnt++ = *xr0pnt + v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1345 *xr0pnt++ -= v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1346 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1347 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1348 *xrpnt++ = *xr0pnt - v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1349 *xr0pnt++ += v;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1350 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1351 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1352 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1353 *xrpnt++ = *xr0pnt++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1354 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1355 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1356 for(i=(&xr[1][SBLIMIT][0]-xrpnt)>>1;i;i--) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1357 *xrpnt++ = *xr0pnt++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1358 *xrpnt++ = *xr0pnt++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1359 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1360
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1361 gr_info->maxbandl = max+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1362 gr_info->maxb = longLimit[sfreq][gr_info->maxbandl];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1363 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1364
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1365 while ( part2remain > 16 ) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1366 getbits(16); /* Dismiss stuffing Bits */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1367 part2remain -= 16;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1368 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1369 if(part2remain > 0 )
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1370 getbits(part2remain);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1371 else if(part2remain < 0) {
400
9d0b5ec9cc26 FIXME cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
1372 char err[128];
9d0b5ec9cc26 FIXME cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
1373 snprintf(err, sizeof (err),
9d0b5ec9cc26 FIXME cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
1374 "MPGLIB: Can't rewind stream by %d bits!",
9d0b5ec9cc26 FIXME cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
1375 -part2remain);
9d0b5ec9cc26 FIXME cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
1376 BAIL_MACRO(err, 1); /* -> error */
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1377 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1378 return 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1379 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1380 #endif
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1381
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1382 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1383 * III_stereo: calculate real channel values for Joint-I-Stereo-mode
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1384 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1385 static void III_i_stereo(real xr_buf[2][SBLIMIT][SSLIMIT],int *scalefac,
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1386 struct gr_info_s *gr_info,int sfreq,int ms_stereo,int lsf)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1387 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1388 real (*xr)[SBLIMIT*SSLIMIT] = (real (*)[SBLIMIT*SSLIMIT] ) xr_buf;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1389 struct bandInfoStruct *bi = &bandInfo[sfreq];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1390 real *tab1,*tab2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1391
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1392 if(lsf) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1393 int p = gr_info->scalefac_compress & 0x1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1394 if(ms_stereo) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1395 tab1 = pow1_2[p]; tab2 = pow2_2[p];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1396 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1397 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1398 tab1 = pow1_1[p]; tab2 = pow2_1[p];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1399 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1400 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1401 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1402 if(ms_stereo) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1403 tab1 = tan1_2; tab2 = tan2_2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1404 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1405 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1406 tab1 = tan1_1; tab2 = tan2_1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1407 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1408 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1409
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1410 if (gr_info->block_type == 2)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1411 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1412 int lwin,do_l = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1413 if( gr_info->mixed_block_flag )
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1414 do_l = 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1415
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1416 for (lwin=0;lwin<3;lwin++) /* process each window */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1417 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1418 /* get first band with zero values */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1419 int is_p,sb,idx,sfb = gr_info->maxband[lwin]; /* sfb is minimal 3 for mixed mode */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1420 if(sfb > 3)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1421 do_l = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1422
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1423 for(;sfb<12;sfb++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1424 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1425 is_p = scalefac[sfb*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1426 if(is_p != 7) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1427 real t1,t2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1428 sb = bi->shortDiff[sfb];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1429 idx = bi->shortIdx[sfb] + lwin;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1430 t1 = tab1[is_p]; t2 = tab2[is_p];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1431 for (; sb > 0; sb--,idx+=3)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1432 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1433 real v = xr[0][idx];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1434 xr[0][idx] = v * t1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1435 xr[1][idx] = v * t2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1436 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1437 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1438 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1439
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1440 #if 1
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1441 /* in the original: copy 10 to 11 , here: copy 11 to 12
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1442 maybe still wrong??? (copy 12 to 13?) */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1443 is_p = scalefac[11*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1444 sb = bi->shortDiff[12];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1445 idx = bi->shortIdx[12] + lwin;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1446 #else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1447 is_p = scalefac[10*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1448 sb = bi->shortDiff[11];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1449 idx = bi->shortIdx[11] + lwin;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1450 #endif
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1451 if(is_p != 7)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1452 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1453 real t1,t2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1454 t1 = tab1[is_p]; t2 = tab2[is_p];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1455 for ( ; sb > 0; sb--,idx+=3 )
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1456 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1457 real v = xr[0][idx];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1458 xr[0][idx] = v * t1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1459 xr[1][idx] = v * t2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1460 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1461 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1462 } /* end for(lwin; .. ; . ) */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1463
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1464 if (do_l)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1465 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1466 /* also check l-part, if ALL bands in the three windows are 'empty'
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1467 * and mode = mixed_mode
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1468 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1469 int sfb = gr_info->maxbandl;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1470 int idx = bi->longIdx[sfb];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1471
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1472 for ( ; sfb<8; sfb++ )
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1473 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1474 int sb = bi->longDiff[sfb];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1475 int is_p = scalefac[sfb]; /* scale: 0-15 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1476 if(is_p != 7) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1477 real t1,t2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1478 t1 = tab1[is_p]; t2 = tab2[is_p];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1479 for ( ; sb > 0; sb--,idx++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1480 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1481 real v = xr[0][idx];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1482 xr[0][idx] = v * t1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1483 xr[1][idx] = v * t2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1484 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1485 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1486 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1487 idx += sb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1488 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1489 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1490 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1491 else /* ((gr_info->block_type != 2)) */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1492 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1493 int sfb = gr_info->maxbandl;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1494 int is_p,idx = bi->longIdx[sfb];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1495 for ( ; sfb<21; sfb++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1496 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1497 int sb = bi->longDiff[sfb];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1498 is_p = scalefac[sfb]; /* scale: 0-15 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1499 if(is_p != 7) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1500 real t1,t2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1501 t1 = tab1[is_p]; t2 = tab2[is_p];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1502 for ( ; sb > 0; sb--,idx++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1503 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1504 real v = xr[0][idx];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1505 xr[0][idx] = v * t1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1506 xr[1][idx] = v * t2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1507 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1508 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1509 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1510 idx += sb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1511 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1512
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1513 is_p = scalefac[20]; /* copy l-band 20 to l-band 21 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1514 if(is_p != 7)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1515 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1516 int sb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1517 real t1 = tab1[is_p],t2 = tab2[is_p];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1518
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1519 for ( sb = bi->longDiff[21]; sb > 0; sb--,idx++ )
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1520 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1521 real v = xr[0][idx];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1522 xr[0][idx] = v * t1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1523 xr[1][idx] = v * t2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1524 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1525 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1526 } /* ... */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1527 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1528
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1529 static void III_antialias(real xr[SBLIMIT][SSLIMIT],struct gr_info_s *gr_info)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1530 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1531 int sblim;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1532
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1533 if(gr_info->block_type == 2)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1534 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1535 if(!gr_info->mixed_block_flag)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1536 return;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1537 sblim = 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1538 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1539 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1540 sblim = gr_info->maxb-1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1541 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1542
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1543 /* 31 alias-reduction operations between each pair of sub-bands */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1544 /* with 8 butterflies between each pair */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1545
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1546 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1547 int sb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1548 real *xr1=(real *) xr[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1549
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1550 for(sb=sblim;sb;sb--,xr1+=10)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1551 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1552 int ss;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1553 real *cs=aa_cs,*ca=aa_ca;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1554 real *xr2 = xr1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1555
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1556 for(ss=7;ss>=0;ss--)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1557 { /* upper and lower butterfly inputs */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1558 register real bu = *--xr2,bd = *xr1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1559 *xr2 = (bu * (*cs) ) - (bd * (*ca) );
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1560 *xr1++ = (bd * (*cs++) ) + (bu * (*ca++) );
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1561 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1562 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1563 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1564 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1565
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1566 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1567 DCT insipired by Jeff Tsay's DCT from the maplay package
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1568 this is an optimized version with manual unroll.
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1569
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1570 References:
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1571 [1] S. Winograd: "On Computing the Discrete Fourier Transform",
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1572 Mathematics of Computation, Volume 32, Number 141, January 1978,
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1573 Pages 175-199
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1574 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1575
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1576 static void dct36(real *inbuf,real *o1,real *o2,real *wintab,real *tsbuf)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1577 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1578 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1579 register real *in = inbuf;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1580
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1581 in[17]+=in[16]; in[16]+=in[15]; in[15]+=in[14];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1582 in[14]+=in[13]; in[13]+=in[12]; in[12]+=in[11];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1583 in[11]+=in[10]; in[10]+=in[9]; in[9] +=in[8];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1584 in[8] +=in[7]; in[7] +=in[6]; in[6] +=in[5];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1585 in[5] +=in[4]; in[4] +=in[3]; in[3] +=in[2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1586 in[2] +=in[1]; in[1] +=in[0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1587
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1588 in[17]+=in[15]; in[15]+=in[13]; in[13]+=in[11]; in[11]+=in[9];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1589 in[9] +=in[7]; in[7] +=in[5]; in[5] +=in[3]; in[3] +=in[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1590
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1591
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1592 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1593
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1594 #define MACRO0(v) { \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1595 real tmp; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1596 out2[9+(v)] = (tmp = sum0 + sum1) * w[27+(v)]; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1597 out2[8-(v)] = tmp * w[26-(v)]; } \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1598 sum0 -= sum1; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1599 ts[SBLIMIT*(8-(v))] = out1[8-(v)] + sum0 * w[8-(v)]; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1600 ts[SBLIMIT*(9+(v))] = out1[9+(v)] + sum0 * w[9+(v)];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1601 #define MACRO1(v) { \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1602 real sum0,sum1; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1603 sum0 = tmp1a + tmp2a; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1604 sum1 = (tmp1b + tmp2b) * tfcos36[(v)]; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1605 MACRO0(v); }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1606 #define MACRO2(v) { \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1607 real sum0,sum1; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1608 sum0 = tmp2a - tmp1a; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1609 sum1 = (tmp2b - tmp1b) * tfcos36[(v)]; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1610 MACRO0(v); }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1611
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1612 register const real *c = COS9;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1613 register real *out2 = o2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1614 register real *w = wintab;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1615 register real *out1 = o1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1616 register real *ts = tsbuf;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1617
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1618 real ta33,ta66,tb33,tb66;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1619
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1620 ta33 = in[2*3+0] * c[3];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1621 ta66 = in[2*6+0] * c[6];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1622 tb33 = in[2*3+1] * c[3];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1623 tb66 = in[2*6+1] * c[6];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1624
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1625 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1626 real tmp1a,tmp2a,tmp1b,tmp2b;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1627 tmp1a = in[2*1+0] * c[1] + ta33 + in[2*5+0] * c[5] + in[2*7+0] * c[7];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1628 tmp1b = in[2*1+1] * c[1] + tb33 + in[2*5+1] * c[5] + in[2*7+1] * c[7];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1629 tmp2a = in[2*0+0] + in[2*2+0] * c[2] + in[2*4+0] * c[4] + ta66 + in[2*8+0] * c[8];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1630 tmp2b = in[2*0+1] + in[2*2+1] * c[2] + in[2*4+1] * c[4] + tb66 + in[2*8+1] * c[8];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1631
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1632 MACRO1(0);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1633 MACRO2(8);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1634 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1635
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1636 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1637 real tmp1a,tmp2a,tmp1b,tmp2b;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1638 tmp1a = ( in[2*1+0] - in[2*5+0] - in[2*7+0] ) * c[3];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1639 tmp1b = ( in[2*1+1] - in[2*5+1] - in[2*7+1] ) * c[3];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1640 tmp2a = ( in[2*2+0] - in[2*4+0] - in[2*8+0] ) * c[6] - in[2*6+0] + in[2*0+0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1641 tmp2b = ( in[2*2+1] - in[2*4+1] - in[2*8+1] ) * c[6] - in[2*6+1] + in[2*0+1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1642
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1643 MACRO1(1);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1644 MACRO2(7);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1645 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1646
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1647 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1648 real tmp1a,tmp2a,tmp1b,tmp2b;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1649 tmp1a = in[2*1+0] * c[5] - ta33 - in[2*5+0] * c[7] + in[2*7+0] * c[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1650 tmp1b = in[2*1+1] * c[5] - tb33 - in[2*5+1] * c[7] + in[2*7+1] * c[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1651 tmp2a = in[2*0+0] - in[2*2+0] * c[8] - in[2*4+0] * c[2] + ta66 + in[2*8+0] * c[4];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1652 tmp2b = in[2*0+1] - in[2*2+1] * c[8] - in[2*4+1] * c[2] + tb66 + in[2*8+1] * c[4];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1653
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1654 MACRO1(2);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1655 MACRO2(6);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1656 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1657
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1658 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1659 real tmp1a,tmp2a,tmp1b,tmp2b;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1660 tmp1a = in[2*1+0] * c[7] - ta33 + in[2*5+0] * c[1] - in[2*7+0] * c[5];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1661 tmp1b = in[2*1+1] * c[7] - tb33 + in[2*5+1] * c[1] - in[2*7+1] * c[5];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1662 tmp2a = in[2*0+0] - in[2*2+0] * c[4] + in[2*4+0] * c[8] + ta66 - in[2*8+0] * c[2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1663 tmp2b = in[2*0+1] - in[2*2+1] * c[4] + in[2*4+1] * c[8] + tb66 - in[2*8+1] * c[2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1664
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1665 MACRO1(3);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1666 MACRO2(5);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1667 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1668
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1669 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1670 real sum0,sum1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1671 sum0 = in[2*0+0] - in[2*2+0] + in[2*4+0] - in[2*6+0] + in[2*8+0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1672 sum1 = (in[2*0+1] - in[2*2+1] + in[2*4+1] - in[2*6+1] + in[2*8+1] ) * tfcos36[4];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1673 MACRO0(4);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1674 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1675 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1676
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1677 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1678 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1679
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1680 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1681 * new DCT12
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1682 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1683 static void dct12(real *in,real *rawout1,real *rawout2,register real *wi,register real *ts)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1684 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1685 #define DCT12_PART1 \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1686 in5 = in[5*3]; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1687 in5 += (in4 = in[4*3]); \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1688 in4 += (in3 = in[3*3]); \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1689 in3 += (in2 = in[2*3]); \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1690 in2 += (in1 = in[1*3]); \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1691 in1 += (in0 = in[0*3]); \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1692 \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1693 in5 += in3; in3 += in1; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1694 \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1695 in2 *= COS6_1; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1696 in3 *= COS6_1; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1697
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1698 #define DCT12_PART2 \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1699 in0 += in4 * COS6_2; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1700 \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1701 in4 = in0 + in2; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1702 in0 -= in2; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1703 \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1704 in1 += in5 * COS6_2; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1705 \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1706 in5 = (in1 + in3) * tfcos12[0]; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1707 in1 = (in1 - in3) * tfcos12[2]; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1708 \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1709 in3 = in4 + in5; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1710 in4 -= in5; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1711 \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1712 in2 = in0 + in1; \
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1713 in0 -= in1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1714
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1715
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1716 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1717 real in0,in1,in2,in3,in4,in5;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1718 register real *out1 = rawout1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1719 ts[SBLIMIT*0] = out1[0]; ts[SBLIMIT*1] = out1[1]; ts[SBLIMIT*2] = out1[2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1720 ts[SBLIMIT*3] = out1[3]; ts[SBLIMIT*4] = out1[4]; ts[SBLIMIT*5] = out1[5];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1721
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1722 DCT12_PART1
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1723
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1724 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1725 real tmp0,tmp1 = (in0 - in4);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1726 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1727 real tmp2 = (in1 - in5) * tfcos12[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1728 tmp0 = tmp1 + tmp2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1729 tmp1 -= tmp2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1730 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1731 ts[(17-1)*SBLIMIT] = out1[17-1] + tmp0 * wi[11-1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1732 ts[(12+1)*SBLIMIT] = out1[12+1] + tmp0 * wi[6+1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1733 ts[(6 +1)*SBLIMIT] = out1[6 +1] + tmp1 * wi[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1734 ts[(11-1)*SBLIMIT] = out1[11-1] + tmp1 * wi[5-1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1735 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1736
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1737 DCT12_PART2
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1738
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1739 ts[(17-0)*SBLIMIT] = out1[17-0] + in2 * wi[11-0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1740 ts[(12+0)*SBLIMIT] = out1[12+0] + in2 * wi[6+0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1741 ts[(12+2)*SBLIMIT] = out1[12+2] + in3 * wi[6+2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1742 ts[(17-2)*SBLIMIT] = out1[17-2] + in3 * wi[11-2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1743
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1744 ts[(6+0)*SBLIMIT] = out1[6+0] + in0 * wi[0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1745 ts[(11-0)*SBLIMIT] = out1[11-0] + in0 * wi[5-0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1746 ts[(6+2)*SBLIMIT] = out1[6+2] + in4 * wi[2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1747 ts[(11-2)*SBLIMIT] = out1[11-2] + in4 * wi[5-2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1748 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1749
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1750 in++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1751
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1752 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1753 real in0,in1,in2,in3,in4,in5;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1754 register real *out2 = rawout2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1755
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1756 DCT12_PART1
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1757
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1758 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1759 real tmp0,tmp1 = (in0 - in4);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1760 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1761 real tmp2 = (in1 - in5) * tfcos12[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1762 tmp0 = tmp1 + tmp2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1763 tmp1 -= tmp2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1764 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1765 out2[5-1] = tmp0 * wi[11-1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1766 out2[0+1] = tmp0 * wi[6+1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1767 ts[(12+1)*SBLIMIT] += tmp1 * wi[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1768 ts[(17-1)*SBLIMIT] += tmp1 * wi[5-1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1769 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1770
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1771 DCT12_PART2
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1772
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1773 out2[5-0] = in2 * wi[11-0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1774 out2[0+0] = in2 * wi[6+0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1775 out2[0+2] = in3 * wi[6+2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1776 out2[5-2] = in3 * wi[11-2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1777
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1778 ts[(12+0)*SBLIMIT] += in0 * wi[0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1779 ts[(17-0)*SBLIMIT] += in0 * wi[5-0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1780 ts[(12+2)*SBLIMIT] += in4 * wi[2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1781 ts[(17-2)*SBLIMIT] += in4 * wi[5-2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1782 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1783
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1784 in++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1785
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1786 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1787 real in0,in1,in2,in3,in4,in5;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1788 register real *out2 = rawout2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1789 out2[12]=out2[13]=out2[14]=out2[15]=out2[16]=out2[17]=0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1790
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1791 DCT12_PART1
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1792
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1793 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1794 real tmp0,tmp1 = (in0 - in4);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1795 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1796 real tmp2 = (in1 - in5) * tfcos12[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1797 tmp0 = tmp1 + tmp2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1798 tmp1 -= tmp2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1799 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1800 out2[11-1] = tmp0 * wi[11-1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1801 out2[6 +1] = tmp0 * wi[6+1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1802 out2[0+1] += tmp1 * wi[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1803 out2[5-1] += tmp1 * wi[5-1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1804 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1805
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1806 DCT12_PART2
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1807
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1808 out2[11-0] = in2 * wi[11-0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1809 out2[6 +0] = in2 * wi[6+0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1810 out2[6 +2] = in3 * wi[6+2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1811 out2[11-2] = in3 * wi[11-2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1812
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1813 out2[0+0] += in0 * wi[0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1814 out2[5-0] += in0 * wi[5-0];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1815 out2[0+2] += in4 * wi[2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1816 out2[5-2] += in4 * wi[5-2];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1817 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1818 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1819
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1820 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1821 * III_hybrid
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1822 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1823 static void III_hybrid(real fsIn[SBLIMIT][SSLIMIT],real tsOut[SSLIMIT][SBLIMIT],
279
52b9f37998db Removed global state variable; should be thread safe now.
Ryan C. Gordon <icculus@icculus.org>
parents: 274
diff changeset
1824 int ch,struct gr_info_s *gr_info,struct mpstr *mp)
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1825 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1826 real *tspnt = (real *) tsOut;
279
52b9f37998db Removed global state variable; should be thread safe now.
Ryan C. Gordon <icculus@icculus.org>
parents: 274
diff changeset
1827 real (*block)[2][SBLIMIT*SSLIMIT] = mp->hybrid_block;
52b9f37998db Removed global state variable; should be thread safe now.
Ryan C. Gordon <icculus@icculus.org>
parents: 274
diff changeset
1828 int *blc = mp->hybrid_blc;
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1829 real *rawout1,*rawout2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1830 int bt;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1831 int sb = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1832
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1833 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1834 int b = blc[ch];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1835 rawout1=block[b][ch];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1836 b=-b+1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1837 rawout2=block[b][ch];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1838 blc[ch] = b;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1839 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1840
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1841
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1842 if(gr_info->mixed_block_flag) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1843 sb = 2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1844 dct36(fsIn[0],rawout1,rawout2,win[0],tspnt);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1845 dct36(fsIn[1],rawout1+18,rawout2+18,win1[0],tspnt+1);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1846 rawout1 += 36; rawout2 += 36; tspnt += 2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1847 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1848
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1849 bt = gr_info->block_type;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1850 if(bt == 2) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1851 for (; sb<gr_info->maxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1852 dct12(fsIn[sb],rawout1,rawout2,win[2],tspnt);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1853 dct12(fsIn[sb+1],rawout1+18,rawout2+18,win1[2],tspnt+1);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1854 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1855 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1856 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1857 for (; sb<gr_info->maxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1858 dct36(fsIn[sb],rawout1,rawout2,win[bt],tspnt);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1859 dct36(fsIn[sb+1],rawout1+18,rawout2+18,win1[bt],tspnt+1);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1860 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1861 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1862
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1863 for(;sb<SBLIMIT;sb++,tspnt++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1864 int i;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1865 for(i=0;i<SSLIMIT;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1866 tspnt[i*SBLIMIT] = *rawout1++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1867 *rawout2++ = 0.0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1868 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1869 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1870 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1871
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1872 /*
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1873 * main layer3 handler
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1874 */
281
ad4c8f34136a Minor formatting updates.
Ryan C. Gordon <icculus@icculus.org>
parents: 279
diff changeset
1875 int do_layer3(struct frame *fr,unsigned char *pcm_sample,
ad4c8f34136a Minor formatting updates.
Ryan C. Gordon <icculus@icculus.org>
parents: 279
diff changeset
1876 int *pcm_point,struct mpstr *mp)
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1877 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1878 int gr, ch, ss,clip=0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1879 int scalefacs[2][39]; /* max 39 for short[13][3] mode, mixed: 38, long: 22 */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1880 struct III_sideinfo sideinfo;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1881 int stereo = fr->stereo;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1882 int single = fr->single;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1883 int ms_stereo,i_stereo;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1884 int sfreq = fr->sampling_frequency;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1885 int stereo1,granules;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1886
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1887 if(stereo == 1) { /* stream is mono */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1888 stereo1 = 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1889 single = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1890 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1891 else if(single >= 0) /* stream is stereo, but force to mono */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1892 stereo1 = 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1893 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1894 stereo1 = 2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1895
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1896 if(fr->mode == MPG_MD_JOINT_STEREO) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1897 ms_stereo = fr->mode_ext & 0x2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1898 i_stereo = fr->mode_ext & 0x1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1899 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1900 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1901 ms_stereo = i_stereo = 0;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1902
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1903 if(fr->lsf) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1904 granules = 1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1905 if(!III_get_side_info_2(&sideinfo,stereo,ms_stereo,sfreq,single))
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1906 return -1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1907 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1908 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1909 granules = 2;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1910 #ifdef MPEG1
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1911 if(!III_get_side_info_1(&sideinfo,stereo,ms_stereo,sfreq,single))
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1912 return -1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1913 #else
387
fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
Ryan C. Gordon <icculus@icculus.org>
parents: 299
diff changeset
1914 __Sound_SetError("MPGLIB: Not supported!");
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1915 #endif
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1916 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1917
279
52b9f37998db Removed global state variable; should be thread safe now.
Ryan C. Gordon <icculus@icculus.org>
parents: 274
diff changeset
1918 if(set_pointer(sideinfo.main_data_begin,mp) == MP3_ERR)
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1919 return -1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1920
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1921 for (gr=0;gr<granules;gr++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1922 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1923 real hybridIn[2][SBLIMIT][SSLIMIT];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1924 real hybridOut[2][SSLIMIT][SBLIMIT];
519
72efeb4643b6 Fixed uninitialized buffer in mpglib. (Thanks, Phil!).
Ryan C. Gordon <icculus@icculus.org>
parents: 441
diff changeset
1925 memset(hybridIn, '\0', sizeof (hybridIn));
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1926
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1927 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1928 struct gr_info_s *gr_info = &(sideinfo.ch[0].gr[gr]);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1929 long part2bits;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1930 if(fr->lsf)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1931 part2bits = III_get_scale_factors_2(scalefacs[0],gr_info,0);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1932 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1933 #ifdef MPEG1
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1934 part2bits = III_get_scale_factors_1(scalefacs[0],gr_info);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1935 #else
387
fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
Ryan C. Gordon <icculus@icculus.org>
parents: 299
diff changeset
1936 __Sound_SetError("MPGLIB: Not supported!");
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1937 #endif
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1938 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1939 if(III_dequantize_sample(hybridIn[0], scalefacs[0],gr_info,sfreq,part2bits))
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1940 return clip;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1941 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1942 if(stereo == 2) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1943 struct gr_info_s *gr_info = &(sideinfo.ch[1].gr[gr]);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1944 long part2bits;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1945 if(fr->lsf)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1946 part2bits = III_get_scale_factors_2(scalefacs[1],gr_info,i_stereo);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1947 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1948 #ifdef MPEG1
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1949 part2bits = III_get_scale_factors_1(scalefacs[1],gr_info);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1950 #else
387
fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
Ryan C. Gordon <icculus@icculus.org>
parents: 299
diff changeset
1951 __Sound_SetError("MPGLIB: Not supported!");
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1952 #endif
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1953 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1954
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1955 if(III_dequantize_sample(hybridIn[1],scalefacs[1],gr_info,sfreq,part2bits))
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1956 return clip;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1957
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1958 if(ms_stereo) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1959 int i;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1960 for(i=0;i<SBLIMIT*SSLIMIT;i++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1961 real tmp0,tmp1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1962 tmp0 = ((real *) hybridIn[0])[i];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1963 tmp1 = ((real *) hybridIn[1])[i];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1964 ((real *) hybridIn[0])[i] = tmp0 + tmp1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1965 ((real *) hybridIn[1])[i] = tmp0 - tmp1;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1966 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1967 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1968
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1969 if(i_stereo)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1970 III_i_stereo(hybridIn,scalefacs[1],gr_info,sfreq,ms_stereo,fr->lsf);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1971
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1972 if(ms_stereo || i_stereo || (single == 3) ) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1973 if(gr_info->maxb > sideinfo.ch[0].gr[gr].maxb)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1974 sideinfo.ch[0].gr[gr].maxb = gr_info->maxb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1975 else
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1976 gr_info->maxb = sideinfo.ch[0].gr[gr].maxb;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1977 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1978
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1979 switch(single) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1980 case 3:
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1981 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1982 register int i;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1983 register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1984 for(i=0;i<SSLIMIT*gr_info->maxb;i++,in0++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1985 *in0 = (*in0 + *in1++); /* *0.5 done by pow-scale */
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1986 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1987 break;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1988 case 1:
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1989 {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1990 register int i;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1991 register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1];
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1992 for(i=0;i<SSLIMIT*gr_info->maxb;i++)
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1993 *in0++ = *in1++;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1994 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1995 break;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1996 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1997 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1998
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1999 for(ch=0;ch<stereo1;ch++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2000 struct gr_info_s *gr_info = &(sideinfo.ch[ch].gr[gr]);
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2001 III_antialias(hybridIn[ch],gr_info);
279
52b9f37998db Removed global state variable; should be thread safe now.
Ryan C. Gordon <icculus@icculus.org>
parents: 274
diff changeset
2002 III_hybrid(hybridIn[ch], hybridOut[ch], ch,gr_info,mp);
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2003 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2004
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2005 for(ss=0;ss<SSLIMIT;ss++) {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2006 if(single >= 0) {
279
52b9f37998db Removed global state variable; should be thread safe now.
Ryan C. Gordon <icculus@icculus.org>
parents: 274
diff changeset
2007 clip += synth_1to1_mono(hybridOut[0][ss],pcm_sample,pcm_point,mp);
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2008 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2009 else {
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2010 int p1 = *pcm_point;
279
52b9f37998db Removed global state variable; should be thread safe now.
Ryan C. Gordon <icculus@icculus.org>
parents: 274
diff changeset
2011 clip += synth_1to1(hybridOut[0][ss],0,pcm_sample,&p1,mp);
52b9f37998db Removed global state variable; should be thread safe now.
Ryan C. Gordon <icculus@icculus.org>
parents: 274
diff changeset
2012 clip += synth_1to1(hybridOut[1][ss],1,pcm_sample,pcm_point,mp);
261
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2013 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2014 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2015 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2016
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2017 return clip;
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2018 }
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2019
9b6e82f7c853 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2020