annotate alt_audio_convert.c @ 361:473e6217fdfa

Updated.
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 12 Jun 2002 08:35:30 +0000
parents c984aa6990f7
children f61eadea1f44
rev   line source
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1 /*
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2 Extended Audio Converter for SDL (Simple DirectMedia Layer)
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3 Copyright (C) 2002 Frank Ranostaj
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4 Institute of Applied Physik
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5 Johann Wolfgang Goethe-Universität
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6 Frankfurt am Main, Germany
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7
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8 This library is free software; you can redistribute it and/or
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9 modify it under the terms of the GNU Library General Public
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10 License as published by the Free Software Foundation; either
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11 version 2 of the License, or (at your option) any later version.
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12
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13 This library is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 Library General Public License for more details.
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17
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18 You should have received a copy of the GNU Library General Public
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19 License along with this library; if not, write to the Free
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20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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21
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22 Frank Ranostaj
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23 ranostaj@stud.uni-frankfurt.de
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24
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25 (This code blatantly abducted for SDL_sound. Thanks, Frank! --ryan.)
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26
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27 */
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28 #include "alt_audio_convert.h"
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29 #include <stdlib.h>
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30 #include <math.h>
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31
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32 /* some macros for "parsing" format */
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33
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34 #define IS_8BIT(x) ((x).format & 0x0008)
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35 #define IS_16BIT(x) ((x).format & 0x0010)
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36 #define IS_FLOAT(x) ((x).format & 0x0020) /* !!! FIXME: is this ok? */
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37 #define IS_SIGNED(x) ((x).format & 0x8000)
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38 #define IS_SYSENDIAN(x) ((AUDIO_U16SYS ^ (x).format) & 0x1000)
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39
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40
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41 /*-------------------------------------------------------------------------*/
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42 /* this filter (Kaiser-window beta=6.8) gives a decent -80dB attentuation */
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43 static const int filter[_fsize/2] = {
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44 0, 20798, 0, -6764, 0, 3863, 0, -2560,
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45 0, 1800, 0, -1295, 0, 936, 0, -671,
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46 0, 474, 0, -326, 0, 217, 0, -138,
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47 0, 83, 0, -46, 0, 23, 0, -9 };
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48
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49 /* Mono (1 channel ) */
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50 #define Suffix(x) x##1
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51 #include "filter_templates.h"
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52 #undef Suffix
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53
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54 /* Stereo (2 channel ) */
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55 #define Suffix(x) x##2
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56 #include "filter_templates.h"
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57 #undef Suffix
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58
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59 /*-------------------------------------------------------------------------*/
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60 static int ConvertAudio( Sound_AudioCVT *Data,
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61 Uint8* buffer, int length, int mode )
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62 {
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63 AdapterC Temp;
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64 int i;
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65
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66 /* Make sure there's a converter */
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67 if( Data == NULL ) {
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68 SDL_SetError("No converter given");
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69 return(-1);
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70 }
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71
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72 /* Make sure there's data to convert */
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73 if( buffer == NULL ) {
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74 SDL_SetError("No buffer allocated for conversion");
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75 return(-1);
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76 }
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77
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78 /* Set up the conversion and go! */
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79 Temp.buffer = buffer;
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80 Temp.mode = mode;
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81 Temp.filter = &Data->filter;
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82
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83 for( i = 0; Data->adapter[i] != NULL; i++ )
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84 length = (*Data->adapter[i])( Temp, length);
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85
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86 return length;
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87 }
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88
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89 int Sound_ConvertAudio( Sound_AudioCVT *Data )
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90 {
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91 /* !!! FIXME: Try the looping stuff under certain circumstances? --ryan. */
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92 return ConvertAudio( Data, Data->buf, Data->len, 0 );
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93 }
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94
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95
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96 /*-------------------------------------------------------------------------*/
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97 static int expand8BitTo16BitSys( AdapterC Data, int length )
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98 {
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99 int i;
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100 Uint8* inp = Data.buffer;
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101 Uint16* buffer = (Uint16*)Data.buffer;
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102 for( i = length; i--; )
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103 buffer[i] = inp[i]<<8;
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104 return 2*length;
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105 }
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106
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107 static int expand8BitTo16BitWrong( AdapterC Data, int length )
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108 {
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109 int i;
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110 Uint8* inp = Data.buffer;
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111 Uint16* buffer = (Uint16*)Data.buffer;
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112 for( i = length; i--; )
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113 buffer[i] = inp[i];
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114 return 2*length;
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115 }
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116
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117 /*-------------------------------------------------------------------------*/
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118 static int expand16BitToFloat( AdapterC Data, int length )
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119 {
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120 int i;
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121 Sint16* inp = (Sint16*)Data.buffer;
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122 float* buffer = (float*)Data.buffer;
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123 for( i = length>>1; i--; )
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124 buffer[i] = inp[i]*(1./32767);
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125 return 2*length;
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126 }
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127
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128 /*-------------------------------------------------------------------------*/
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129 static int swapBytes( AdapterC Data, int length )
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130 {
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131 /*
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132 * !!! FIXME !!!
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133 *
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134 *
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135 * Use the faster SDL-Macros to swap
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136 * - Frank
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137 */
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138
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139 int i;
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140 Uint16 a,b;
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141 Uint16* buffer = (Uint16*) Data.buffer;
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142 for( i = length>>1; i --; )
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143 {
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144 a = b = buffer[i];
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145 buffer[i] = ( a << 8 ) | ( b >> 8 );
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146 }
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147 return length;
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148 }
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diff changeset
149
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diff changeset
150 /*-------------------------------------------------------------------------*/
360
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diff changeset
151 static int cutFloatTo16Bit( AdapterC Data, int length )
338
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152 {
360
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diff changeset
153 int i;
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diff changeset
154 float* inp = (float*) Data.buffer;
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diff changeset
155 Sint16* buffer = (Sint16*) Data.buffer;
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diff changeset
156 length>>=2;
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diff changeset
157 for( i = 0; i < length; i++ )
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diff changeset
158 {
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diff changeset
159 if( inp[i] > 1. )
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diff changeset
160 buffer[i] = 32767;
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diff changeset
161 else if( inp[i] < -1. )
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diff changeset
162 buffer[i] = -32768;
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diff changeset
163 else
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164 buffer[i] = 32767 * inp[i];
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165 }
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166 return 2*length;
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167 }
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diff changeset
168
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diff changeset
169 /*-------------------------------------------------------------------------*/
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diff changeset
170 static int cut16BitSysTo8Bit( AdapterC Data, int length )
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171 {
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diff changeset
172 int i;
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173 Uint16* inp = (Uint16*) Data.buffer;
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diff changeset
174 Uint8* buffer = Data.buffer;
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175 length >>= 1;
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176 for( i = 0; i < length; i++ )
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177 buffer[i] = inp[i]>>8;
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178 return length;
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179 }
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diff changeset
180
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diff changeset
181 static int cut16BitWrongTo8Bit( AdapterC Data, int length )
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182 {
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diff changeset
183 int i;
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184 Uint16* inp = (Uint16*) Data.buffer;
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185 Uint8* buffer = Data.buffer;
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186 length >>= 1;
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187 for( i = 0; i < length; i++ )
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188 buffer[i] = inp[i] & 0xff;
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diff changeset
189 return length;
338
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190 }
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191
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192 /*-------------------------------------------------------------------------*/
360
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diff changeset
193 static int changeSigned( AdapterC Data, int length, int XOR )
338
7b9a0f3f030e Initial add.
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194 {
360
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195 int i;
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diff changeset
196 Uint32* buffer = (Uint32*) Data.buffer;
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diff changeset
197 for( i = length>>2; i--; )
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diff changeset
198 buffer[i] ^= XOR;
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diff changeset
199 for( i = 4*(length>>2); i < length; i++)
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diff changeset
200 ((Uint8*)buffer)[i] ^= ((Uint8*)&XOR)[i&3];
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diff changeset
201 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
202 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
203
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
204 static int changeSigned16BitSys( AdapterC Data, int length )
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diff changeset
205 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
206 return changeSigned( Data, length, 0x80008000 );
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
207 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
208
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
209 static int changeSigned16BitWrong( AdapterC Data, int length )
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
210 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
211 return changeSigned( Data, length, 0x00800080 );
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Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
212 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
213
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
214 static int changeSigned8Bit( AdapterC Data, int length )
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Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
215 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
216 return changeSigned( Data, length, 0x80808080 );
338
7b9a0f3f030e Initial add.
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parents:
diff changeset
217 }
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
218
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
219 /*-------------------------------------------------------------------------*/
360
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parents: 347
diff changeset
220 static int convertStereoToMonoS16Bit( AdapterC Data, int length )
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
221 {
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
222 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
223 Sint16* buffer = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
224 Sint16* src = (Sint16*) Data.buffer;
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Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
225 length >>= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
226 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
227 buffer[i] = ((int) *(src++) + *(src++) ) >> 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
228 return 2*length;
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Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
229 }
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
230
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
231 static int convertStereoToMonoU16Bit( AdapterC Data, int length )
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Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
232 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
233 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
234 Uint16* buffer = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
235 Uint16* src = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
236 length >>= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
237 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
238 buffer[i] = ((int) *(src++) + *(src++) ) >> 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
239 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
240 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
241
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
242 static int convertStereoToMonoS8Bit( AdapterC Data, int length )
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Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
243 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
244 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
245 Sint8* buffer = (Sint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
246 Sint8* src = (Sint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
247 length >>= 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
248 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
249 buffer[i] = ((int) *(src++) + *(src++) ) >> 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
250 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
251 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
252
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
253 static int convertStereoToMonoU8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
254 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
255 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
256 Uint8* buffer = (Uint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
257 Uint8* src = (Uint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
258 length >>= 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
259 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
260 buffer[i] = ((int) *(src++) + *(src++) ) >> 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
261 return length;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
262 }
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
263
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
264 /*-------------------------------------------------------------------------*/
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
265 static int convertMonoToStereo16Bit( AdapterC Data, int length )
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
266 {
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
267 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
268 Uint16* buffer = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
269 Uint16* dst = (Uint16*)Data.buffer + length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
270 for( i = length>>1; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
271 *(--dst) = *(--dst) = buffer[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
272 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
273 }
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
274
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
275 static int convertMonoToStereo8Bit( AdapterC Data, int length )
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Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
276 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
277 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
278 Uint8* buffer = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
279 Uint8* dst = Data.buffer + 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
280 for( i = length; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
281 *(--dst) = *(--dst) = buffer[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
282 return 2*length;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
283 }
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
284
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
285 /*-------------------------------------------------------------------------*/
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
286 static int minus5dB( AdapterC Data, int length )
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
287 {
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
288 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
289 Sint16* buffer = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
290 for(i = length>>1; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
291 buffer[i]= 38084 * buffer[i] >> 16;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
292 return length;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
293 }
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
294
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
295 /*-------------------------------------------------------------------------*/
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
296 static int doubleRateStereo( AdapterC Data, int length )
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
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297 {
360
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diff changeset
298 length >>= 2;
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diff changeset
299 _doubleRate2( (Sint16*)Data.buffer, Data.mode, length );
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diff changeset
300 return 4*_doubleRate2( (Sint16*)Data.buffer+1, Data.mode, length );
338
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parents:
diff changeset
301 }
7b9a0f3f030e Initial add.
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parents:
diff changeset
302
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
303 static int doubleRateMono( AdapterC Data, int length )
338
7b9a0f3f030e Initial add.
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parents:
diff changeset
304 {
360
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diff changeset
305 return 2*_doubleRate1( (Sint16*)Data.buffer, Data.mode, length>>1 );
338
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parents:
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306 }
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
307
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
308 /*-------------------------------------------------------------------------*/
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
309 static int halfRateStereo( AdapterC Data, int length )
338
7b9a0f3f030e Initial add.
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parents:
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310 {
360
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diff changeset
311 length >>= 2;
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diff changeset
312 _halfRate2( (Sint16*)Data.buffer, Data.mode, length );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
313 return 4*_halfRate2( (Sint16*)Data.buffer+1, Data.mode, length );
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
314 }
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
315
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
316 static int halfRateMono( AdapterC Data, int length )
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
317 {
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
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diff changeset
318 return 2*_halfRate2( (Sint16*)Data.buffer, Data.mode, length>>1 );
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
319 }
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
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320
7b9a0f3f030e Initial add.
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parents:
diff changeset
321 /*-------------------------------------------------------------------------*/
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
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parents: 347
diff changeset
322 static int varRateUpStereo( AdapterC Data, int length )
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
323 {
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
324 length >>= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
325 _varRateUp2( (Sint16*)Data.buffer, Data.mode, Data.filter, length );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
326 return 4 * _varRateUp2( (Sint16*)Data.buffer+1,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
327 Data.mode, Data.filter, length );
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
328 }
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
329
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
330 static int varRateUpMono( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
331 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
332 return 2 * _varRateUp1( (Sint16*)Data.buffer,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
333 Data.mode, Data.filter, length>>1 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
334 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
335
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
336 static int varRateDownStereo( AdapterC Data, int length )
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
337 {
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
338 length >>= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
339 _varRateDown2( (Sint16*)Data.buffer, Data.mode, Data.filter, length );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
340 return 2 * _varRateDown2( (Sint16*)Data.buffer+1,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
341 Data.mode, Data.filter, length );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
342 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
343
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
344 static int varRateDownMono( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
345 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
346 return _varRateDown1( (Sint16*)Data.buffer,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
347 Data.mode, Data.filter, length>>1 );
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
348 }
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
349
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
350 /*-------------------------------------------------------------------------*/
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
351 typedef struct{
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
352 Sint16 denominator;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
353 Sint16 numerator;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
354 } Fraction;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
355
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
356 static Fraction findFraction( float Value )
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
357 {
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
358 /* gives a maximal error of 3% and typical less than 0.2% */
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
359 const Uint8 frac[96]={
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
360 1, 2, -1, /* /1 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
361 1, 3, -1, /* /2 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
362 2, 4, 5, -1, /* /3 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
363 3, 5, 7, -1, /* /4 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
364 3, 4, 6, 7, 8, 9, -1, /* /5 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
365 5, 7, 11, -1, /* /6 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
366 4, 5, 6, 8, 9, 10, 11, 12, 13, -1, /* /7 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
367 5, 7, 9, 11, 13, 15, -1, /* /8 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
368 5, 7, 8, 10, 11, 13, 14, 16, -1, /* /9 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
369 7, 9, 11, 13, -1, /* /10 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
370 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, -1, /* /11 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
371 7, 11, 13, -1, /* /12 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
372 7, 8, 9, 10, 11, 12, 14, 15, 16, -1, /* /13 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
373 9, 11, 13, 15, -1, /* /14 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
374 8, 11, 13, 14, 16, -1, /* /15 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
375 9, 11, 13, 15 }; /* /16 */
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
376
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
377
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
378 Fraction Result = {0,0};
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
379 int n,num,den=1;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
380
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
381 float RelErr, BestErr = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
382 if( Value < 31/64. || Value > 64/31. ) return Result;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
383
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
384 for( n = 0; n < sizeof(frac); num=frac[++n] )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
385 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
386 if( num < 0 ) den++;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
387 RelErr = Value * num / den;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
388 RelErr = min( RelErr, 1/RelErr );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
389 if( RelErr > BestErr )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
390 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
391 BestErr = RelErr;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
392 Result.denominator = den;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
393 Result.numerator = num;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
394 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
395 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
396 return Result;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
397 }
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
398
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
399 /*-------------------------------------------------------------------------*/
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
400 static float sinc( float x )
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
401 {
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
402 if( x > -1e-24 && x < 1e-24 ) return 1.;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
403 else return sin(x)/x;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
404 }
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
405
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
406 static void calculateVarFilter( Sint16* dst, float Ratio, float phase, float scale )
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
407 {
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
408 const Uint16 KaiserWindow7[]= {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
409 22930, 16292, 14648, 14288, 14470, 14945, 15608, 16404,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
410 17304, 18289, 19347, 20467, 21644, 22872, 24145, 25460,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
411 26812, 28198, 29612, 31052, 32513, 33991, 35482, 36983,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
412 38487, 39993, 41494, 42986, 44466, 45928, 47368, 48782,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
413 50165, 51513, 52821, 54086, 55302, 56466, 57575, 58624,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
414 59610, 60529, 61379, 62156, 62858, 63483, 64027, 64490,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
415 64870, 65165, 65375, 65498, 65535, 65484, 65347, 65124,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
416 64815, 64422, 63946, 63389, 62753, 62039, 61251, 60391 };
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
417 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
418 float w;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
419 const float fg = -.018 + .5 * Ratio;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
420 const float omega = 2 * M_PI * fg;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
421 phase -= 63;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
422 for( i = 0; i < 64; i++)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
423 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
424 w = scale * ( KaiserWindow7[i] * ( i + 1 ));
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
425 dst[i] = w * sinc( omega * (i+phase) );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
426 dst[127-i] = w * sinc( omega * (127-i+phase) );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
427 }
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
428 }
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
429
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
430 typedef struct{
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
431 float scale;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
432 int incr;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
433 } VarFilterMode;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
434
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
435 const VarFilterMode Up = { 0.0211952, -1 };
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
436 const VarFilterMode Down = { 0.0364733, 1 };
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
437
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
438 static void setupVarFilter( VarFilter* filter,
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
439 float Ratio, VarFilterMode Direction )
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
440 {
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
441 int i,n,d;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
442 Fraction IRatio;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
443 float phase;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
444 IRatio = findFraction( Ratio );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
445 Ratio = min( Ratio, 1/Ratio );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
446
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
447 n = IRatio.numerator;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
448 d = IRatio.denominator;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
449 filter->pos_mod = d;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
450
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
451 for( i = 0; i < d; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
452 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
453 if( phase >= n )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
454 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
455 phase -= d;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
456 filter->incr[i] = Direction.incr;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
457 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
458 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
459 filter->incr[i] = 1+Direction.incr;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
460
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
461 calculateVarFilter( filter->c[i], Ratio, phase/(float)n,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
462 Direction.scale );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
463 phase += d;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
464 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
465 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
466
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
467 /*-------------------------------------------------------------------------*/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
468 static void createRateConverter( Sound_AudioCVT *Data, int* fip,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
469 int SrcRate, int DestRate, int Channel )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
470 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
471 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
472
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
473 int VarPos = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
474 int Mono = 2 - Channel;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
475 float Ratio = DestRate;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
476 *fip = -1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
477
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
478
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
479 if( SrcRate < 1 || SrcRate > 1<<18 ||
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
480 DestRate < 1 || DestRate > 1<<18 ) return;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
481 Ratio /= SrcRate;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
482
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
483 if( Ratio > 1.)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
484 VarPos = filter_index++;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
485 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
486 Data->adapter[filter_index++] = minus5dB;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
487
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
488 while( Ratio > 64./31.)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
489 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
490 Data->adapter[filter_index++] =
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
491 Mono ? doubleRateMono : doubleRateStereo;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
492 Ratio /= 2.;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
493 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
494 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
495 Data->add += _fsize;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
496 }
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
497
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
498 while( Ratio < 31./64. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
499 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
500 Data->adapter[filter_index++] =
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
501 Mono ? halfRateMono : halfRateStereo;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
502 Ratio *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
503 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
504
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
505 if( Ratio > 1. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
506 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
507 setupVarFilter( &Data->filter, Ratio, Up );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
508 Data->adapter[VarPos] =
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
509 Mono ? varRateUpMono : varRateUpStereo;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
510 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
511 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
512 Data->add += _fsize;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
513 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
514 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
515 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
516 setupVarFilter( &Data->filter, Ratio, Down );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
517 Data->adapter[filter_index++] =
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
518 Mono ? varRateDownMono : varRateDownStereo;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
519 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
520 *fip = filter_index;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
521 }
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
522
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
523 /*-------------------------------------------------------------------------*/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
524 static void createFormatConverter16Bit(Sound_AudioCVT *Data, int* fip,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
525 SDL_AudioSpec src, SDL_AudioSpec dst )
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
526 {
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
527 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
528
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
529 if( src.channels == 2 && dst.channels == 1 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
530 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
531 Data->add /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
532 Data->len_mult /= 2;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
533
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
534 if( !IS_SYSENDIAN(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
535 Data->adapter[filter_index++] = swapBytes;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
536
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
537 if( IS_SIGNED(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
538 Data->adapter[filter_index++] = convertStereoToMonoS16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
539 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
540 Data->adapter[filter_index++] = convertStereoToMonoU16Bit;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
541
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
542 if( !IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
543 Data->adapter[filter_index++] = swapBytes;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
544 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
545 else if( IS_SYSENDIAN(src) != IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
546 Data->adapter[filter_index++] = swapBytes;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
547
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
548 if( IS_SIGNED(src) != IS_SIGNED(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
549 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
550 if( IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
551 Data->adapter[filter_index++] = changeSigned16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
552 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
553 Data->adapter[filter_index++] = changeSigned16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
554 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
555
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
556 if( src.channels == 1 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
557 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
558 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
559 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
560 Data->adapter[filter_index++] = convertMonoToStereo16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
561 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
562
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
563 *fip = filter_index;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
564 }
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
565
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
566 /*-------------------------------------------------------------------------*/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
567 static void createFormatConverter8Bit(Sound_AudioCVT *Data, int *fip,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
568 SDL_AudioSpec src, SDL_AudioSpec dst )
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
569 {
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
570 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
571 if( IS_16BIT(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
572 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
573 Data->add /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
574 Data->len_mult /= 2;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
575
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
576 if( IS_SYSENDIAN(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
577 Data->adapter[filter_index++] = cut16BitSysTo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
578 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
579 Data->adapter[filter_index++] = cut16BitWrongTo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
580 }
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
581
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
582 if( src.channels == 2 && dst.channels == 1 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
583 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
584 Data->add /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
585 Data->len_mult /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
586
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
587 if( IS_SIGNED(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
588 Data->adapter[filter_index++] = convertStereoToMonoS8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
589 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
590 Data->adapter[filter_index++] = convertStereoToMonoU8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
591 }
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
592
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
593 if( IS_SIGNED(src) != IS_SIGNED(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
594 Data->adapter[filter_index++] = changeSigned8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
595
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
596 if( src.channels == 1 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
597 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
598 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
599 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
600 Data->adapter[filter_index++] = convertMonoToStereo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
601 }
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
602
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
603 if( !IS_8BIT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
604 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
605 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
606 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
607 if( IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
608 Data->adapter[filter_index++] = expand8BitTo16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
609 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
610 Data->adapter[filter_index++] = expand8BitTo16BitWrong;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
611 }
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
612
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
613 *fip = filter_index;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
614 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
615
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
616 /*-------------------------------------------------------------------------*/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
617 static void createFormatConverter(Sound_AudioCVT *Data, int *fip,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
618 SDL_AudioSpec src, SDL_AudioSpec dst )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
619 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
620 int filter_index = *fip;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
621
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
622 if( IS_FLOAT(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
623 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
624 Data->adapter[filter_index++] = cutFloatTo16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
625 Data->len_mult /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
626 Data->add /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
627 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
628
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
629 if( IS_8BIT(src) || IS_8BIT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
630 createFormatConverter8Bit( Data, &filter_index, src, dst);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
631 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
632 createFormatConverter16Bit( Data, &filter_index, src, dst);
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
633
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
634 if( IS_FLOAT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
635 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
636 Data->adapter[filter_index++] = expand16BitToFloat;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
637 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
638 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
639 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
640
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
641 *fip = filter_index;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
642 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
643
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
644
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
645 /*-------------------------------------------------------------------------*/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
646 DECLSPEC int BuildAudioCVT(Sound_AudioCVT *Data,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
647 SDL_AudioSpec src, SDL_AudioSpec dst )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
648 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
649 SDL_AudioSpec intrm;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
650 int filter_index = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
651
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
652 if( Data == NULL ) return -1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
653 Data->len_mult = 1.;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
654 Data->add = 0;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
655
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
656 /* Check channels */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
657 if( src.channels < 1 || src.channels > 2 ||
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
658 dst.channels < 1 || dst.channels > 2 ) goto error_exit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
659
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
660 /* If no frequency conversion is needed, go straight to dst format */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
661 if( src.freq == dst.freq )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
662 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
663 createFormatConverter( Data, &filter_index, src, dst );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
664 goto sucess_exit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
665 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
666
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
667 /* Convert to signed 16Bit System-Endian */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
668 intrm.format = AUDIO_S16SYS;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
669 intrm.channels = min( src.channels, dst.channels );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
670 createFormatConverter( Data, &filter_index, src, intrm );
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
671
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
672 /* Do rate conversion */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
673 if( src.channels == 2 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
674 createRateConverter( Data, &filter_index, src.freq, dst.freq, 2 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
675 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
676 createRateConverter( Data, &filter_index, src.freq, dst.freq, 1 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
677 /* propagate error */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
678 if( filter_index < 0 ) goto error_exit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
679
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
680 /* Convert to final format */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
681 createFormatConverter( Data, &filter_index, intrm, dst );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
682
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
683 /* Set up the filter information */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
684 sucess_exit:
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
685 /* !!! FIXME: Is it okay to assign NULL to a function pointer?
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
686 Borland says no. -frank */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
687 Data->adapter[filter_index] = NULL;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
688 return 0;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
689
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
690 error_exit:
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
691 /* !!! FIXME: Is it okay to assign NULL to a function pointer?
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
692 Borland says no. -frank */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
693 Data->adapter[0] = NULL;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
694 return -1;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
695 }
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
696
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
697 /*-------------------------------------------------------------------------*/
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
698 static char *fmt_to_str(Uint16 fmt)
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
699 {
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
700 switch (fmt)
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
701 {
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
702 case AUDIO_U8: return " U8";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
703 case AUDIO_S8: return " S8";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
704 case AUDIO_U16MSB: return "U16MSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
705 case AUDIO_S16MSB: return "S16MSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
706 case AUDIO_U16LSB: return "U16LSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
707 case AUDIO_S16LSB: return "S16LSB";
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
708 }
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
709 return "??????";
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
710 }
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
711
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
712 #define AdapterDesc(x) { x, #x }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
713
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
714 static void show_AudioCVT( Sound_AudioCVT *Data )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
715 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
716 int i,j;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
717 const struct{ int (*adapter) ( AdapterC, int); Sint8 *name; }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
718 AdapterDescription[] = {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
719 AdapterDesc(expand8BitTo16BitSys),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
720 AdapterDesc(expand8BitTo16BitWrong),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
721 AdapterDesc(expand16BitToFloat),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
722 AdapterDesc(swapBytes),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
723 AdapterDesc(cut16BitSysTo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
724 AdapterDesc(cut16BitWrongTo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
725 AdapterDesc(cutFloatTo16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
726 AdapterDesc(changeSigned16BitSys),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
727 AdapterDesc(changeSigned16BitWrong),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
728 AdapterDesc(changeSigned8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
729 AdapterDesc(convertStereoToMonoS16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
730 AdapterDesc(convertStereoToMonoU16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
731 AdapterDesc(convertStereoToMonoS8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
732 AdapterDesc(convertStereoToMonoU8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
733 AdapterDesc(convertMonoToStereo16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
734 AdapterDesc(convertMonoToStereo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
735 AdapterDesc(minus5dB),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
736 AdapterDesc(doubleRateStereo),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
737 AdapterDesc(doubleRateMono),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
738 AdapterDesc(halfRateStereo),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
739 AdapterDesc(halfRateMono),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
740 AdapterDesc(varRateUpStereo),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
741 AdapterDesc(varRateUpMono),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
742 AdapterDesc(varRateDownStereo),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
743 AdapterDesc(varRateDownMono),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
744 { NULL, "----------NULL-----------" }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
745 };
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
746 const int AdapterDescMax = sizeof(AdapterDescription)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
747 / sizeof(*AdapterDescription);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
748
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
749 fprintf( stderr, "\nAdapter List: \n" );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
750 for( i = 0; i < 32; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
751 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
752 for( j = 0; j < AdapterDescMax; j++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
753 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
754 if( Data->adapter[i] == AdapterDescription[j].adapter )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
755 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
756 fprintf( stderr, " %s\n", AdapterDescription[j].name );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
757 if( Data->adapter[i] == NULL ) return;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
758 goto cont;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
759 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
760 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
761 fprintf( stderr, " Error: unknown adapter\n" );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
762 cont:
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
763 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
764 fprintf( stderr, " Error: NULL adapter missing\n" );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
765 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
766
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
767
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
768 int Sound_BuildAudioCVT(Sound_AudioCVT *Data,
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
769 Uint16 src_format, Uint8 src_channels, int src_rate,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
770 Uint16 dst_format, Uint8 dst_channels, int dst_rate)
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
771 {
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
772 SDL_AudioSpec src, dst;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
773 int ret;
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
774
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
775 fprintf (stderr,
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
776 "Sound_BuildAudioCVT() :\n"
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
777 "-----------------------\n"
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
778 "format: %s -> %s\n"
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
779 "channels: %6d -> %6d\n"
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
780 "rate: %6d -> %6d\n",
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
781 fmt_to_str (src_format), fmt_to_str (dst_format),
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
782 src_channels, dst_channels,
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
783 src_rate, dst_rate);
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
784
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
785 src.format = src_format;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
786 src.channels = src_channels;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
787 src.freq = src_rate;
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
788
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
789 dst.format = dst_format;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
790 dst.channels = dst_channels;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
791 dst.freq = dst_rate;
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
792
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
793 ret = BuildAudioCVT( Data, src, dst );
347
778cee61e1be Mono-to-stereo fixes, more fprintf debugging output.
Ryan C. Gordon <icculus@icculus.org>
parents: 342
diff changeset
794
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
795 show_AudioCVT( Data );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
796 fprintf (stderr, "\n"
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
797 "return value: %d \n", ret );
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
798
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 347
diff changeset
799 return ret;
342
fbbb1f25b944 Cleanups by Torbj�rn.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
800 }