Mercurial > SDL_sound_CoreAudio
annotate decoders/shn.c @ 230:aa4137f121e4
Updated.
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Sat, 19 Jan 2002 03:11:26 +0000 |
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children | 15a3b1a1291c |
rev | line source |
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86 | 1 /* |
2 * SDL_sound -- An abstract sound format decoding API. | |
3 * Copyright (C) 2001 Ryan C. Gordon. | |
4 * | |
5 * This library is free software; you can redistribute it and/or | |
6 * modify it under the terms of the GNU Lesser General Public | |
7 * License as published by the Free Software Foundation; either | |
8 * version 2.1 of the License, or (at your option) any later version. | |
9 * | |
10 * This library is distributed in the hope that it will be useful, | |
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 * Lesser General Public License for more details. | |
14 * | |
15 * You should have received a copy of the GNU Lesser General Public | |
16 * License along with this library; if not, write to the Free Software | |
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 */ | |
19 | |
20 /* | |
21 * Shorten decoder for SDL_sound. | |
22 * | |
23 * This driver handles Shorten-compressed waveforms. Despite the fact that | |
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24 * SHNs tend to be much bigger than MP3s, they are still the de facto |
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25 * standard in online music trading communities. If an MP3 crunches the |
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26 * waveform to 10-20 percent of its original size, SHNs only go to about |
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27 * 50-60%. Why do the Phish fans of the world use this format then? Rabid |
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28 * music traders appreciate the sound quality; SHNs, unlike MP3s, do not |
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29 * throw away any part of the waveform. Yes, there are people that notice |
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30 * this, and further more, they demand it...and if they can't get a good |
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31 * transfer of those larger files over the 'net, they haven't underestimated |
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32 * the bandwidth of CDs travelling the world through the postal system. |
86 | 33 * |
34 * Shorten homepage: http://www.softsound.com/Shorten.html | |
35 * | |
36 * The Shorten format was gleaned from the shorten codebase, by Tony | |
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37 * Robinson and SoftSound Limited. |
86 | 38 * |
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39 * Please see the file COPYING in the source's root directory. |
86 | 40 * |
41 * This file written by Ryan C. Gordon. (icculus@clutteredmind.org) | |
42 */ | |
43 | |
106
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44 #if HAVE_CONFIG_H |
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45 # include <config.h> |
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46 #endif |
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47 |
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48 #ifdef SOUND_SUPPORTS_SHN |
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49 |
86 | 50 #include <stdio.h> |
51 #include <stdlib.h> | |
52 #include <string.h> | |
53 #include <assert.h> | |
54 | |
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55 #include "SDL_sound.h" |
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56 |
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57 #define __SDL_SOUND_INTERNAL__ |
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58 #include "SDL_sound_internal.h" |
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59 |
126 | 60 #ifdef _MSC_VER |
61 # define inline __inline | |
62 #endif | |
86 | 63 |
64 static int SHN_init(void); | |
65 static void SHN_quit(void); | |
66 static int SHN_open(Sound_Sample *sample, const char *ext); | |
67 static void SHN_close(Sound_Sample *sample); | |
68 static Uint32 SHN_read(Sound_Sample *sample); | |
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69 static int SHN_rewind(Sound_Sample *sample); |
86 | 70 |
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71 static const char *extensions_shn[] = { "SHN", NULL }; |
86 | 72 const Sound_DecoderFunctions __Sound_DecoderFunctions_SHN = |
73 { | |
74 { | |
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75 extensions_shn, |
86 | 76 "Shorten-compressed audio data", |
77 "Ryan C. Gordon <icculus@clutteredmind.org>", | |
78 "http://www.icculus.org/SDL_sound/" | |
79 }, | |
80 | |
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81 SHN_init, /* init() method */ |
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82 SHN_quit, /* quit() method */ |
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83 SHN_open, /* open() method */ |
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84 SHN_close, /* close() method */ |
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85 SHN_read, /* read() method */ |
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86 SHN_rewind /* rewind() method */ |
86 | 87 }; |
88 | |
89 | |
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90 #define SHN_BUFSIZ 512 |
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91 |
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92 typedef struct |
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93 { |
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94 Sint32 version; |
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95 Sint32 datatype; |
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96 Sint32 nchan; |
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97 Sint32 blocksize; |
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98 Sint32 maxnlpc; |
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99 Sint32 nmean; |
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100 Sint32 nwrap; |
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101 Sint32 **buffer; |
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102 Sint32 **offset; |
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103 Sint32 *qlpc; |
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104 Sint32 lpcqoffset; |
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105 Sint32 bitshift; |
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106 int nbitget; |
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107 int nbyteget; |
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108 Uint8 *getbuf; |
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109 Uint8 *getbufp; |
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110 Uint32 gbuffer; |
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111 Uint8 *backBuffer; |
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112 Uint32 backBufferSize; |
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113 Uint32 backBufLeft; |
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114 } shn_t; |
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115 |
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116 |
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117 static const Uint32 mask_table[] = |
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118 { |
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119 0x00000000, 0x00000001, 0x00000003, 0x00000007, 0x0000000F, 0x0000001F, |
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120 0x0000003F, 0x0000007F, 0x000000FF, 0x000001FF, 0x000003FF, 0x000007FF, |
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121 0x00000FFF, 0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF, 0x0001FFFF, |
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122 0x0003FFFF, 0x0007FFFF, 0x000FFFFF, 0x001FFFFF, 0x003FFFFF, 0x007FFFFF, |
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123 0x00FFFFFF, 0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF, 0x0FFFFFFF, 0x1FFFFFFF, |
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124 0x3FFFFFFF, 0x7FFFFFFF, 0xFFFFFFFF |
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125 }; |
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126 |
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127 |
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128 static const Uint8 ulaw_outward[13][256] = { |
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129 {127,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,255,254,253,252,251,250,249,248,247,246,245,244,243,242,241,240,239,238,237,236,235,234,233,232,231,230,229,228,227,226,225,224,223,222,221,220,219,218,217,216,215,214,213,212,211,210,209,208,207,206,205,204,203,202,201,200,199,198,197,196,195,194,193,192,191,190,189,188,187,186,185,184,183,182,181,180,179,178,177,176,175,174,173,172,171,170,169,168,167,166,165,164,163,162,161,160,159,158,157,156,155,154,153,152,151,150,149,148,147,146,145,144,143,142,141,140,139,138,137,136,135,134,133,132,131,130,129,128}, |
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130 {112,114,116,118,120,122,124,126,127,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,113,115,117,119,121,123,125,255,253,251,249,247,245,243,241,239,238,237,236,235,234,233,232,231,230,229,228,227,226,225,224,223,222,221,220,219,218,217,216,215,214,213,212,211,210,209,208,207,206,205,204,203,202,201,200,199,198,197,196,195,194,193,192,191,190,189,188,187,186,185,184,183,182,181,180,179,178,177,176,175,174,173,172,171,170,169,168,167,166,165,164,163,162,161,160,159,158,157,156,155,154,153,152,151,150,149,148,147,146,145,144,143,142,141,140,139,138,137,136,135,134,133,132,131,130,129,128,254,252,250,248,246,244,242,240}, |
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131 {96,98,100,102,104,106,108,110,112,113,114,116,117,118,120,121,122,124,125,126,127,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,97,99,101,103,105,107,109,111,115,119,123,255,251,247,243,239,237,235,233,231,229,227,225,223,222,221,220,219,218,217,216,215,214,213,212,211,210,209,208,207,206,205,204,203,202,201,200,199,198,197,196,195,194,193,192,191,190,189,188,187,186,185,184,183,182,181,180,179,178,177,176,175,174,173,172,171,170,169,168,167,166,165,164,163,162,161,160,159,158,157,156,155,154,153,152,151,150,149,148,147,146,145,144,143,142,141,140,139,138,137,136,135,134,133,132,131,130,129,128,254,253,252,250,249,248,246,245,244,242,241,240,238,236,234,232,230,228,226,224}, |
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132 {80,82,84,86,88,90,92,94,96,97,98,100,101,102,104,105,106,108,109,110,112,113,114,115,116,117,118,120,121,122,123,124,125,126,127,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,81,83,85,87,89,91,93,95,99,103,107,111,119,255,247,239,235,231,227,223,221,219,217,215,213,211,209,207,206,205,204,203,202,201,200,199,198,197,196,195,194,193,192,191,190,189,188,187,186,185,184,183,182,181,180,179,178,177,176,175,174,173,172,171,170,169,168,167,166,165,164,163,162,161,160,159,158,157,156,155,154,153,152,151,150,149,148,147,146,145,144,143,142,141,140,139,138,137,136,135,134,133,132,131,130,129,128,254,253,252,251,250,249,248,246,245,244,243,242,241,240,238,237,236,234,233,232,230,229,228,226,225,224,222,220,218,216,214,212,210,208}, |
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133 {64,66,68,70,72,74,76,78,80,81,82,84,85,86,88,89,90,92,93,94,96,97,98,99,100,101,102,104,105,106,107,108,109,110,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,65,67,69,71,73,75,77,79,83,87,91,95,103,111,255,239,231,223,219,215,211,207,205,203,201,199,197,195,193,191,190,189,188,187,186,185,184,183,182,181,180,179,178,177,176,175,174,173,172,171,170,169,168,167,166,165,164,163,162,161,160,159,158,157,156,155,154,153,152,151,150,149,148,147,146,145,144,143,142,141,140,139,138,137,136,135,134,133,132,131,130,129,128,254,253,252,251,250,249,248,247,246,245,244,243,242,241,240,238,237,236,235,234,233,232,230,229,228,227,226,225,224,222,221,220,218,217,216,214,213,212,210,209,208,206,204,202,200,198,196,194,192}, |
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134 {49,51,53,55,57,59,61,63,64,66,67,68,70,71,72,74,75,76,78,79,80,81,82,84,85,86,87,88,89,90,92,93,94,95,96,97,98,99,100,101,102,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,50,52,54,56,58,60,62,65,69,73,77,83,91,103,255,231,219,211,205,201,197,193,190,188,186,184,182,180,178,176,175,174,173,172,171,170,169,168,167,166,165,164,163,162,161,160,159,158,157,156,155,154,153,152,151,150,149,148,147,146,145,144,143,142,141,140,139,138,137,136,135,134,133,132,131,130,129,128,254,253,252,251,250,249,248,247,246,245,244,243,242,241,240,239,238,237,236,235,234,233,232,230,229,228,227,226,225,224,223,222,221,220,218,217,216,215,214,213,212,210,209,208,207,206,204,203,202,200,199,198,196,195,194,192,191,189,187,185,183,181,179,177}, |
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135 {32,34,36,38,40,42,44,46,48,49,51,52,53,55,56,57,59,60,61,63,64,65,66,67,68,70,71,72,73,74,75,76,78,79,80,81,82,83,84,85,86,87,88,89,90,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,33,35,37,39,41,43,45,47,50,54,58,62,69,77,91,255,219,205,197,190,186,182,178,175,173,171,169,167,165,163,161,159,158,157,156,155,154,153,152,151,150,149,148,147,146,145,144,143,142,141,140,139,138,137,136,135,134,133,132,131,130,129,128,254,253,252,251,250,249,248,247,246,245,244,243,242,241,240,239,238,237,236,235,234,233,232,231,230,229,228,227,226,225,224,223,222,221,220,218,217,216,215,214,213,212,211,210,209,208,207,206,204,203,202,201,200,199,198,196,195,194,193,192,191,189,188,187,185,184,183,181,180,179,177,176,174,172,170,168,166,164,162,160}, |
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136 {16,18,20,22,24,26,28,30,32,33,34,36,37,38,40,41,42,44,45,46,48,49,50,51,52,53,55,56,57,58,59,60,61,63,64,65,66,67,68,69,70,71,72,73,74,75,76,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,17,19,21,23,25,27,29,31,35,39,43,47,54,62,77,255,205,190,182,175,171,167,163,159,157,155,153,151,149,147,145,143,142,141,140,139,138,137,136,135,134,133,132,131,130,129,128,254,253,252,251,250,249,248,247,246,245,244,243,242,241,240,239,238,237,236,235,234,233,232,231,230,229,228,227,226,225,224,223,222,221,220,219,218,217,216,215,214,213,212,211,210,209,208,207,206,204,203,202,201,200,199,198,197,196,195,194,193,192,191,189,188,187,186,185,184,183,181,180,179,178,177,176,174,173,172,170,169,168,166,165,164,162,161,160,158,156,154,152,150,148,146,144}, |
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137 {2,4,6,8,10,12,14,16,17,18,20,21,22,24,25,26,28,29,30,32,33,34,35,36,37,38,40,41,42,43,44,45,46,48,49,50,51,52,53,54,55,56,57,58,59,60,61,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,0,1,3,5,7,9,11,13,15,19,23,27,31,39,47,62,255,190,175,167,159,155,151,147,143,141,139,137,135,133,131,129,254,253,252,251,250,249,248,247,246,245,244,243,242,241,240,239,238,237,236,235,234,233,232,231,230,229,228,227,226,225,224,223,222,221,220,219,218,217,216,215,214,213,212,211,210,209,208,207,206,205,204,203,202,201,200,199,198,197,196,195,194,193,192,191,189,188,187,186,185,184,183,182,181,180,179,178,177,176,174,173,172,171,170,169,168,166,165,164,163,162,161,160,158,157,156,154,153,152,150,149,148,146,145,144,142,140,138,136,134,132,130,128}, |
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138 {1,2,4,5,6,8,9,10,12,13,14,16,17,18,19,20,21,22,24,25,26,27,28,29,30,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,0,3,7,11,15,23,31,47,255,175,159,151,143,139,135,131,254,253,252,251,250,249,248,247,246,245,244,243,242,241,240,239,238,237,236,235,234,233,232,231,230,229,228,227,226,225,224,223,222,221,220,219,218,217,216,215,214,213,212,211,210,209,208,207,206,205,204,203,202,201,200,199,198,197,196,195,194,193,192,191,190,189,188,187,186,185,184,183,182,181,180,179,178,177,176,174,173,172,171,170,169,168,167,166,165,164,163,162,161,160,158,157,156,155,154,153,152,150,149,148,147,146,145,144,142,141,140,138,137,136,134,133,132,130,129,128}, |
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139 {1,2,3,4,5,6,8,9,10,11,12,13,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,0,7,15,31,255,159,143,135,254,253,252,251,250,249,248,247,246,245,244,243,242,241,240,239,238,237,236,235,234,233,232,231,230,229,228,227,226,225,224,223,222,221,220,219,218,217,216,215,214,213,212,211,210,209,208,207,206,205,204,203,202,201,200,199,198,197,196,195,194,193,192,191,190,189,188,187,186,185,184,183,182,181,180,179,178,177,176,175,174,173,172,171,170,169,168,167,166,165,164,163,162,161,160,158,157,156,155,154,153,152,151,150,149,148,147,146,145,144,142,141,140,139,138,137,136,134,133,132,131,130,129,128}, |
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140 {1,2,3,4,5,6,7,8,9,10,11,12,13,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,0,15,255,143,254,253,252,251,250,249,248,247,246,245,244,243,242,241,240,239,238,237,236,235,234,233,232,231,230,229,228,227,226,225,224,223,222,221,220,219,218,217,216,215,214,213,212,211,210,209,208,207,206,205,204,203,202,201,200,199,198,197,196,195,194,193,192,191,190,189,188,187,186,185,184,183,182,181,180,179,178,177,176,175,174,173,172,171,170,169,168,167,166,165,164,163,162,161,160,159,158,157,156,155,154,153,152,151,150,149,148,147,146,145,144,142,141,140,139,138,137,136,135,134,133,132,131,130,129,128}, |
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141 {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,0,255,254,253,252,251,250,249,248,247,246,245,244,243,242,241,240,239,238,237,236,235,234,233,232,231,230,229,228,227,226,225,224,223,222,221,220,219,218,217,216,215,214,213,212,211,210,209,208,207,206,205,204,203,202,201,200,199,198,197,196,195,194,193,192,191,190,189,188,187,186,185,184,183,182,181,180,179,178,177,176,175,174,173,172,171,170,169,168,167,166,165,164,163,162,161,160,159,158,157,156,155,154,153,152,151,150,149,148,147,146,145,144,143,142,141,140,139,138,137,136,135,134,133,132,131,130,129,128} |
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142 }; |
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143 |
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144 |
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145 #ifndef MIN_MACRO |
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146 #define MIN_MACRO(a,b) (((a)<(b))?(a):(b)) |
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147 #endif |
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148 |
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149 #ifndef MAX_MACRO |
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150 #define MAX_MACRO(a,b) (((a)>(b))?(a):(b)) |
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151 #endif |
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152 |
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153 #define POSITIVE_ULAW_ZERO 0xff |
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154 #define NEGATIVE_ULAW_ZERO 0x7f |
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155 |
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156 #define CAPMAXSCHAR(x) ((x > 127) ? 127 : x) |
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157 #define CAPMAXUCHAR(x) ((x > 255) ? 255 : x) |
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158 #define CAPMAXSHORT(x) ((x > 32767) ? 32767 : x) |
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159 #define CAPMAXUSHORT(x) ((x > 65535) ? 65535 : x) |
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160 |
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161 #define UNDEFINED_UINT -1 |
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162 #define DEFAULT_BLOCK_SIZE 256 |
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163 #define DEFAULT_V0NMEAN 0 |
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164 #define DEFAULT_V2NMEAN 4 |
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165 #define DEFAULT_MAXNLPC 0 |
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166 #define DEFAULT_NCHAN 1 |
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167 #define DEFAULT_NSKIP 0 |
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168 #define DEFAULT_NDISCARD 0 |
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169 #define NBITPERLONG 32 |
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170 #define DEFAULT_MINSNR 256 |
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171 #define DEFAULT_QUANTERROR 0 |
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172 #define MINBITRATE 2.5 |
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173 |
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174 #define MEAN_VERSION0 0 |
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175 #define MEAN_VERSION2 4 |
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176 |
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177 #define SHN_FN_DIFF0 0 |
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178 #define SHN_FN_DIFF1 1 |
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179 #define SHN_FN_DIFF2 2 |
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180 #define SHN_FN_DIFF3 3 |
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181 #define SHN_FN_QUIT 4 |
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182 #define SHN_FN_BLOCKSIZE 5 |
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183 #define SHN_FN_BITSHIFT 6 |
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184 #define SHN_FN_QLPC 7 |
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185 #define SHN_FN_ZERO 8 |
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186 #define SHN_FN_VERBATIM 9 |
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187 |
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188 #define SHN_TYPE_AU1 0 |
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189 #define SHN_TYPE_S8 1 |
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190 #define SHN_TYPE_U8 2 |
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191 #define SHN_TYPE_S16HL 3 |
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192 #define SHN_TYPE_U16HL 4 |
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193 #define SHN_TYPE_S16LH 5 |
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194 #define SHN_TYPE_U16LH 6 |
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195 #define SHN_TYPE_ULAW 7 |
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196 #define SHN_TYPE_AU2 8 |
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197 #define SHN_TYPE_AU3 9 |
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198 #define SHN_TYPE_ALAW 10 |
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199 #define SHN_TYPE_RIFF_WAVE 11 |
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200 #define SHN_TYPE_EOF 12 |
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201 #define SHN_TYPE_GENERIC_ULAW 128 |
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202 #define SHN_TYPE_GENERIC_ALAW 129 |
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203 |
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204 #define SHN_FNSIZE 2 |
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205 #define SHN_CHANNELSIZE 0 |
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206 #define SHN_TYPESIZE 4 |
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207 #define SHN_ULONGSIZE 2 |
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208 #define SHN_NSKIPSIZE 1 |
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209 #define SHN_LPCQSIZE 2 |
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210 #define SHN_LPCQUANT 5 |
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211 #define SHN_XBYTESIZE 7 |
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212 #define SHN_VERBATIM_CKSIZE_SIZE 5 |
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213 #define SHN_VERBATIM_BYTE_SIZE 8 |
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214 #define SHN_ENERGYSIZE 3 |
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215 #define SHN_BITSHIFTSIZE 2 |
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216 |
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217 #define SHN_LPCQOFFSET_VER2 (1 << SHN_LPCQUANT) |
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218 |
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219 |
212
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220 #define SHN_MAGIC 0x676B6A61 /* looks like "ajkg" as chars. */ |
101
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221 |
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222 #ifndef M_LN2 |
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223 #define M_LN2 0.69314718055994530942 |
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224 #endif |
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225 |
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226 #ifndef M_PI |
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227 #define M_PI 3.14159265358979323846 |
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228 #endif |
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229 |
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230 |
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231 static int word_get(shn_t *shn, SDL_RWops *rw, Uint32 *word) |
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232 { |
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233 if (shn->nbyteget < 4) |
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234 { |
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235 shn->nbyteget += SDL_RWread(rw, shn->getbuf, 1, SHN_BUFSIZ); |
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236 BAIL_IF_MACRO(shn->nbyteget < 4, NULL, 0); |
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237 shn->getbufp = shn->getbuf; |
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238 } /* if */ |
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239 |
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240 if (word != NULL) |
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241 { |
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242 *word = (((Sint32) shn->getbufp[0]) << 24) | |
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243 (((Sint32) shn->getbufp[1]) << 16) | |
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244 (((Sint32) shn->getbufp[2]) << 8) | |
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245 (((Sint32) shn->getbufp[3]) ); |
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246 } /* if */ |
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247 |
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248 shn->getbufp += 4; |
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249 shn->nbyteget -= 4; |
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250 |
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251 return(1); |
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252 } /* word_get */ |
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253 |
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254 |
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255 static int uvar_get(int nbin, shn_t *shn, SDL_RWops *rw, Sint32 *word) |
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256 { |
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257 Sint32 result; |
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258 |
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259 if (shn->nbitget == 0) |
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260 { |
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261 BAIL_IF_MACRO(!word_get(shn, rw, &shn->gbuffer), NULL, 0); |
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262 shn->nbitget = 32; |
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263 } /* if */ |
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264 |
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265 for (result = 0; !(shn->gbuffer & (1L << --shn->nbitget)); result++) |
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266 { |
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267 if (shn->nbitget == 0) |
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268 { |
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269 BAIL_IF_MACRO(!word_get(shn, rw, &shn->gbuffer), NULL, 0); |
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270 shn->nbitget = 32; |
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271 } /* if */ |
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272 } /* for */ |
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273 |
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274 while (nbin != 0) |
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275 { |
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276 if (shn->nbitget >= nbin) |
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277 { |
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278 result = ( (result << nbin) | |
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279 ((shn->gbuffer >> (shn->nbitget - nbin)) & |
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280 mask_table[nbin]) ); |
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281 shn->nbitget -= nbin; |
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282 break; |
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283 } /* if */ |
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284 else |
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285 { |
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286 result = (result << shn->nbitget) | |
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287 (shn->gbuffer & mask_table[shn->nbitget]); |
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288 BAIL_IF_MACRO(!word_get(shn, rw, &shn->gbuffer), NULL, 0); |
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289 nbin -= shn->nbitget; |
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290 shn->nbitget = 32; |
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291 } /* else */ |
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292 } /* while */ |
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293 |
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294 if (word != NULL) |
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295 *word = result; |
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296 |
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297 return(1); |
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298 } /* uvar_get */ |
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299 |
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300 |
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301 static int var_get(int nbin, shn_t *shn, SDL_RWops *rw, Sint32 *word) |
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302 { |
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303 BAIL_IF_MACRO(!uvar_get(nbin + 1, shn, rw, word), NULL, 0); |
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304 |
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305 if ((*word) & 1) |
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306 *word = (Sint32) ~((*word) >> 1); |
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307 else |
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308 *word = (Sint32) ((*word) >> 1); |
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309 |
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310 return(1); |
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311 } /* var_get */ |
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312 |
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313 |
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314 static int ulong_get(shn_t *shn, SDL_RWops *rw, Sint32 *word) |
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315 { |
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316 Sint32 nbit; |
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317 Sint32 retval; |
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318 BAIL_IF_MACRO(!uvar_get(SHN_ULONGSIZE, shn, rw, &nbit), NULL, 0); |
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319 BAIL_IF_MACRO(!uvar_get(nbit, shn, rw, &retval), NULL, 0); |
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320 |
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321 if (word != NULL) |
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322 *word = retval; |
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323 |
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324 return(1); |
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325 } /* ulong_get */ |
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326 |
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327 |
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328 static inline int uint_get(int nbit, shn_t *shn, SDL_RWops *rw, Sint32 *word) |
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329 { |
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330 return((shn->version == 0) ? |
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331 uvar_get(nbit, shn, rw, word) : |
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332 ulong_get(shn, rw, word)); |
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333 } /* uint_get */ |
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334 |
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335 |
86 | 336 static int SHN_init(void) |
337 { | |
338 return(1); /* initialization always successful. */ | |
339 } /* SHN_init */ | |
340 | |
341 | |
342 static void SHN_quit(void) | |
343 { | |
344 /* it's a no-op. */ | |
345 } /* SHN_quit */ | |
346 | |
347 | |
348 /* | |
349 * Look through the whole file for a SHN magic number. This is costly, so | |
350 * it should only be done if the user SWEARS they have a Shorten stream... | |
351 */ | |
352 static inline int extended_shn_magic_search(Sound_Sample *sample) | |
353 { | |
354 SDL_RWops *rw = ((Sound_SampleInternal *) sample->opaque)->rw; | |
355 Uint32 word = 0; | |
356 Uint8 ch; | |
357 | |
358 while (1) | |
359 { | |
360 BAIL_IF_MACRO(SDL_RWread(rw, &ch, sizeof (ch), 1) != 1, NULL, -1); | |
361 word = ((word << 8) & 0xFFFFFF00) | ch; | |
212
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362 if (SDL_SwapBE32(word) == SHN_MAGIC) |
86 | 363 { |
364 BAIL_IF_MACRO(SDL_RWread(rw, &ch, sizeof (ch), 1) != 1, NULL, -1); | |
365 return((int) ch); | |
366 } /* if */ | |
367 } /* while */ | |
368 | |
369 return((int) ch); | |
370 } /* extended_shn_magic_search */ | |
371 | |
372 | |
373 /* look for the magic number in the RWops and see what kind of file this is. */ | |
101
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374 static inline int determine_shn_version(Sound_Sample *sample, const char *ext) |
86 | 375 { |
376 SDL_RWops *rw = ((Sound_SampleInternal *) sample->opaque)->rw; | |
377 Uint32 magic; | |
378 Uint8 ch; | |
379 | |
380 /* | |
381 * Apparently the magic number can start at any byte offset in the file, | |
382 * and we should just discard prior data, but I'm going to restrict it | |
383 * to offset zero for now, so we don't chug down every file that might | |
384 * happen to pass through here. If the extension is explicitly "SHN", we | |
385 * check the whole stream, though. | |
386 */ | |
387 | |
388 if (__Sound_strcasecmp(ext, "shn") == 0) | |
101
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389 return(extended_shn_magic_search(sample)); |
86 | 390 |
391 BAIL_IF_MACRO(SDL_RWread(rw, &magic, sizeof (magic), 1) != 1, NULL, -1); | |
212
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392 BAIL_IF_MACRO(SDL_SwapLE32(magic) != SHN_MAGIC, "SHN: Not a SHN file", -1); |
86 | 393 BAIL_IF_MACRO(SDL_RWread(rw, &ch, sizeof (ch), 1) != 1, NULL, -1); |
394 BAIL_IF_MACRO(ch > 3, "SHN: Unsupported file version", -1); | |
395 | |
396 return((int) ch); | |
397 } /* determine_shn_version */ | |
398 | |
399 | |
101
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400 static int init_shn_offset(Sint32 **offset, int nchan, int nblock, int ftype) |
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401 { |
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402 Sint32 mean = 0; |
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403 int chan; |
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404 |
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405 switch (ftype) |
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406 { |
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407 case SHN_TYPE_AU1: |
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408 case SHN_TYPE_S8: |
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409 case SHN_TYPE_S16HL: |
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410 case SHN_TYPE_S16LH: |
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411 case SHN_TYPE_ULAW: |
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412 case SHN_TYPE_AU2: |
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413 case SHN_TYPE_AU3: |
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414 case SHN_TYPE_ALAW: |
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415 mean = 0; |
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416 break; |
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417 case SHN_TYPE_U8: |
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418 mean = 0x80; |
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419 break; |
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420 case SHN_TYPE_U16HL: |
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421 case SHN_TYPE_U16LH: |
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422 mean = 0x8000; |
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423 break; |
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424 default: |
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425 BAIL_MACRO("SHN: unknown file type", 0); |
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426 } /* switch */ |
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427 |
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428 for(chan = 0; chan < nchan; chan++) |
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429 { |
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430 int i; |
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431 for(i = 0; i < nblock; i++) |
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432 offset[chan][i] = mean; |
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433 } /* for */ |
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434 } /* init_shn_offset */ |
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435 |
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436 |
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437 static inline Uint16 cvt_shnftype_to_sdlfmt(Sint16 shntype) |
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438 { |
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439 switch (shntype) |
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440 { |
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441 case SHN_TYPE_S8: |
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442 return(AUDIO_S8); |
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443 |
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444 case SHN_TYPE_ALAW: |
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445 case SHN_TYPE_ULAW: |
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446 case SHN_TYPE_AU1: |
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447 case SHN_TYPE_AU2: |
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448 case SHN_TYPE_AU3: |
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449 case SHN_TYPE_U8: |
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450 return(AUDIO_U8); |
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451 |
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452 case SHN_TYPE_S16HL: |
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453 return(AUDIO_S16MSB); |
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454 |
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455 case SHN_TYPE_S16LH: |
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456 return(AUDIO_S16LSB); |
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457 |
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458 case SHN_TYPE_U16HL: |
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459 return(AUDIO_U16MSB); |
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460 |
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461 case SHN_TYPE_U16LH: |
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462 return(AUDIO_U16LSB); |
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463 } /* switch */ |
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464 |
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465 return(0); |
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466 } /* cvt_shnftype_to_sdlfmt */ |
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467 |
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468 |
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469 static inline int skip_bits(shn_t *shn, SDL_RWops *rw) |
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470 { |
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471 int i; |
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472 Sint32 skip; |
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473 Sint32 trash; |
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474 |
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475 BAIL_IF_MACRO(!uint_get(SHN_NSKIPSIZE, shn, rw, &skip), NULL, 0); |
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476 for(i = 0; i < skip; i++) |
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477 { |
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478 BAIL_IF_MACRO(!uint_get(SHN_XBYTESIZE, shn, rw, &trash), NULL, 0); |
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479 } /* for */ |
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480 |
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481 return(1); |
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482 } /* skip_bits */ |
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483 |
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484 |
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485 static Sint32 **shn_long2d(Uint32 n0, Uint32 n1) |
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486 { |
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487 Sint32 **array0; |
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488 Uint32 size = (n0 * sizeof (Sint32 *)) + (n0 * n1 * sizeof (Sint32)); |
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489 |
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490 array0 = (Sint32 **) malloc(size); |
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491 if (array0 != NULL) |
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492 { |
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493 int i; |
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494 Sint32 *array1 = (Sint32 *) (array0 + n0); |
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495 for(i = 0; i < n0; i++) |
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496 array0[i] = array1 + (i * n1); |
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497 } /* if */ |
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498 |
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499 return(array0); |
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500 } /* shn_long2d */ |
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501 |
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502 #define riffID 0x46464952 /* "RIFF", in ascii. */ |
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503 #define waveID 0x45564157 /* "WAVE", in ascii. */ |
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504 #define fmtID 0x20746D66 /* "fmt ", in ascii. */ |
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505 #define dataID 0x61746164 /* "data", in ascii. */ |
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506 |
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507 static int verb_ReadLE32(shn_t *shn, SDL_RWops *rw, Uint32 *word) |
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508 { |
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509 int i; |
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510 Uint8 chars[4]; |
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511 Sint32 byte; |
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512 |
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513 for (i = 0; i < 4; i++) |
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514 { |
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515 if (!uvar_get(SHN_VERBATIM_BYTE_SIZE, shn, rw, &byte)) |
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516 return(0); |
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517 chars[i] = (Uint8) byte; |
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518 } /* for */ |
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519 |
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520 memcpy(word, chars, sizeof (*word)); |
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521 *word = SDL_SwapLE32(*word); |
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522 |
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523 return(1); |
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524 } /* verb_ReadLE32 */ |
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525 |
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526 |
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527 static int verb_ReadLE16(shn_t *shn, SDL_RWops *rw, Uint16 *word) |
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528 { |
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529 int i; |
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530 Uint8 chars[2]; |
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531 Sint32 byte; |
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|
532 |
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533 for (i = 0; i < 2; i++) |
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534 { |
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535 if (!uvar_get(SHN_VERBATIM_BYTE_SIZE, shn, rw, &byte)) |
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536 return(0); |
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537 chars[i] = (Uint8) byte; |
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538 } /* for */ |
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539 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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540 memcpy(word, chars, sizeof (*word)); |
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541 *word = SDL_SwapLE16(*word); |
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|
542 |
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543 return(1); |
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544 } /* verb_ReadLE16 */ |
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|
545 |
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546 |
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547 static inline int parse_riff_header(shn_t *shn, Sound_Sample *sample) |
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548 { |
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549 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; |
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550 SDL_RWops *rw = internal->rw; |
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551 Uint16 u16; |
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552 Uint32 u32; |
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553 Sint32 cklen; |
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554 |
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555 BAIL_IF_MACRO(!uvar_get(SHN_VERBATIM_CKSIZE_SIZE, shn, rw, &cklen), NULL, 0); |
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556 |
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557 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* RIFF header */ |
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558 BAIL_IF_MACRO(u32 != riffID, "SHN: No RIFF header.", 0); |
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559 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* length */ |
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Ryan C. Gordon <icculus@icculus.org>
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560 |
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561 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* WAVE header */ |
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562 BAIL_IF_MACRO(u32 != waveID, "SHN: No WAVE header.", 0); |
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Ryan C. Gordon <icculus@icculus.org>
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563 |
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564 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* 'fmt ' header */ |
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Ryan C. Gordon <icculus@icculus.org>
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565 BAIL_IF_MACRO(u32 != fmtID, "SHN: No 'fmt ' header.", 0); |
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566 |
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567 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* chunksize */ |
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568 BAIL_IF_MACRO(!verb_ReadLE16(shn, rw, &u16), NULL, 0); /* format */ |
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Ryan C. Gordon <icculus@icculus.org>
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569 BAIL_IF_MACRO(!verb_ReadLE16(shn, rw, &u16), NULL, 0); /* channels */ |
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570 sample->actual.channels = u16; |
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Ryan C. Gordon <icculus@icculus.org>
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571 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* sample rate */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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572 sample->actual.rate = u32; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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573 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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574 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* bytespersec */ |
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Ryan C. Gordon <icculus@icculus.org>
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575 BAIL_IF_MACRO(!verb_ReadLE16(shn, rw, &u16), NULL, 0); /* blockalign */ |
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Ryan C. Gordon <icculus@icculus.org>
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576 BAIL_IF_MACRO(!verb_ReadLE16(shn, rw, &u16), NULL, 0); /* bitspersample */ |
c08794028df4
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Ryan C. Gordon <icculus@icculus.org>
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577 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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578 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* 'data' header */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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579 BAIL_IF_MACRO(u32 != dataID, "SHN: No 'data' header.", 0); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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580 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* chunksize */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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581 |
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582 return(1); |
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583 } /* parse_riff_header */ |
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Ryan C. Gordon <icculus@icculus.org>
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584 |
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585 |
86 | 586 static int SHN_open(Sound_Sample *sample, const char *ext) |
587 { | |
588 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
589 SDL_RWops *rw = internal->rw; | |
101
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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590 shn_t _shn; |
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591 shn_t *shn = &_shn; /* malloc and copy later. */ |
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Ryan C. Gordon <icculus@icculus.org>
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592 Sint32 cmd; |
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Ryan C. Gordon <icculus@icculus.org>
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593 Sint32 chan; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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diff
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594 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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595 memset(shn, '\0', sizeof (shn_t)); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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596 shn->getbufp = shn->getbuf = (Uint8 *) malloc(SHN_BUFSIZ); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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diff
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597 shn->datatype = SHN_TYPE_EOF; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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diff
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598 shn->nchan = DEFAULT_NCHAN; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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599 shn->blocksize = DEFAULT_BLOCK_SIZE; |
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600 shn->maxnlpc = DEFAULT_MAXNLPC; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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601 shn->nmean = UNDEFINED_UINT; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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602 shn->version = determine_shn_version(sample, ext); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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diff
changeset
|
603 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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diff
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|
604 if (shn->version == -1) goto shn_open_puke; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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100
diff
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|
605 if (!uint_get(SHN_TYPESIZE, shn, rw, &shn->datatype)) goto shn_open_puke; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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606 if (!uint_get(SHN_CHANNELSIZE, shn, rw, &shn->nchan)) goto shn_open_puke; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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100
diff
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|
607 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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diff
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608 sample->actual.format = cvt_shnftype_to_sdlfmt(shn->datatype); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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609 if (sample->actual.format == 0) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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610 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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611 SDL_SetError(ERR_UNSUPPORTED_FORMAT); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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100
diff
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612 goto shn_open_puke; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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613 } /* if */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
614 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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615 if (shn->version > 0) |
c08794028df4
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Ryan C. Gordon <icculus@icculus.org>
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616 { |
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617 int rc = uint_get((int) (log((double) DEFAULT_BLOCK_SIZE) / M_LN2), |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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618 shn, rw, &shn->blocksize); |
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parents:
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diff
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|
619 if (!rc) goto shn_open_puke;; |
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Ryan C. Gordon <icculus@icculus.org>
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620 if (!uint_get(SHN_LPCQSIZE, shn, rw, &shn->maxnlpc)) goto shn_open_puke; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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diff
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621 if (!uint_get(0, shn, rw, &shn->nmean)) goto shn_open_puke; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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622 if (!skip_bits(shn, rw)) goto shn_open_puke; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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623 } /* else */ |
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changeset
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624 |
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625 shn->nwrap = (shn->maxnlpc > 3) ? shn->maxnlpc : 3; |
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diff
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626 |
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627 /* grab some space for the input buffer */ |
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628 shn->buffer = shn_long2d((Uint32) shn->nchan, shn->blocksize + shn->nwrap); |
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629 shn->offset = shn_long2d((Uint32) shn->nchan, MAX_MACRO(1, shn->nmean)); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
changeset
|
630 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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631 for (chan = 0; chan < shn->nchan; chan++) |
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632 { |
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633 int i; |
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634 for(i = 0; i < shn->nwrap; i++) |
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635 shn->buffer[chan][i] = 0; |
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636 shn->buffer[chan] += shn->nwrap; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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637 } /* for */ |
86 | 638 |
101
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diff
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639 if (shn->maxnlpc > 0) |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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|
640 { |
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641 shn->qlpc = (int *) malloc((Uint32) (shn->maxnlpc * sizeof (Sint32))); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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642 if (shn->qlpc == NULL) |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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|
643 { |
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644 Sound_SetError(ERR_OUT_OF_MEMORY); |
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645 goto shn_open_puke; |
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646 } /* if */ |
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|
647 } /* if */ |
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changeset
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648 |
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649 if (shn->version > 1) |
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650 shn->lpcqoffset = SHN_LPCQOFFSET_VER2; |
c08794028df4
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Ryan C. Gordon <icculus@icculus.org>
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diff
changeset
|
651 |
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652 init_shn_offset(shn->offset, shn->nchan, |
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653 MAX_MACRO(1, shn->nmean), shn->datatype); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
changeset
|
654 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
655 if ( (!uvar_get(SHN_FNSIZE, shn, rw, &cmd)) || |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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656 (cmd != SHN_FN_VERBATIM) || |
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|
657 (!parse_riff_header(shn, sample)) ) |
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658 { |
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659 if (cmd != SHN_FN_VERBATIM) |
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660 Sound_SetError("SHN: Expected VERBATIM function"); |
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661 |
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662 goto shn_open_puke; |
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663 return(0); |
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664 } /* if */ |
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665 |
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666 shn = (shn_t *) malloc(sizeof (shn_t)); |
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667 if (shn == NULL) |
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668 { |
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669 Sound_SetError(ERR_OUT_OF_MEMORY); |
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670 goto shn_open_puke; |
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671 } /* if */ |
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672 |
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673 memcpy(shn, &_shn, sizeof (shn_t)); |
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674 internal->decoder_private = shn; |
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675 |
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676 SNDDBG(("SHN: Accepting data stream.\n")); |
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677 sample->flags = SOUND_SAMPLEFLAG_NONE; |
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678 return(1); /* we'll handle this data. */ |
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679 |
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680 shn_open_puke: |
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681 if (_shn.getbuf) |
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682 free(_shn.getbuf); |
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683 if (_shn.buffer != NULL) |
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684 free(_shn.buffer); |
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685 if (_shn.offset != NULL) |
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686 free(_shn.offset); |
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687 if (_shn.qlpc != NULL) |
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688 free(_shn.qlpc); |
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689 |
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690 return(0); |
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691 } /* SHN_open */ |
86 | 692 |
693 | |
101
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694 void fix_bitshift(Sint32 *buffer, int nitem, int bitshift, int ftype) |
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695 { |
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696 int i; |
86 | 697 |
101
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698 if (ftype == SHN_TYPE_AU1) |
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699 { |
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700 for (i = 0; i < nitem; i++) |
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701 buffer[i] = ulaw_outward[bitshift][buffer[i] + 128]; |
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702 } /* if */ |
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703 else if (ftype == SHN_TYPE_AU2) |
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|
704 { |
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705 for(i = 0; i < nitem; i++) |
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706 { |
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707 if (buffer[i] >= 0) |
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708 buffer[i] = ulaw_outward[bitshift][buffer[i] + 128]; |
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709 else if (buffer[i] == -1) |
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710 buffer[i] = NEGATIVE_ULAW_ZERO; |
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711 else |
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712 buffer[i] = ulaw_outward[bitshift][buffer[i] + 129]; |
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713 } /* for */ |
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714 } /* else if */ |
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715 else |
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|
716 { |
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717 if (bitshift != 0) |
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718 { |
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719 for(i = 0; i < nitem; i++) |
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720 buffer[i] <<= bitshift; |
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721 } /* if */ |
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722 } /* else */ |
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723 } /* fix_bitshift */ |
86 | 724 |
725 | |
726 static void SHN_close(Sound_Sample *sample) | |
727 { | |
728 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
101
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729 shn_t *shn = (shn_t *) internal->decoder_private; |
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730 |
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731 if (shn->qlpc != NULL) |
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|
732 free(shn->qlpc); |
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|
733 |
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|
734 if (shn->backBuffer != NULL) |
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|
735 free(shn->backBuffer); |
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736 |
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737 if (shn->offset != NULL) |
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|
738 free(shn->offset); |
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|
739 |
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740 if (shn->buffer != NULL) |
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741 free(shn->buffer); |
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|
742 |
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|
743 if (shn->getbuf != NULL) |
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744 free(shn->getbuf); |
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745 |
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746 free(shn); |
86 | 747 } /* SHN_close */ |
748 | |
749 | |
101
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750 /* xLaw conversions... */ |
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751 |
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752 /* adapted by ajr for int input */ |
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753 static Uint8 Slinear2ulaw(int sample) |
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754 { |
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755 /* |
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756 ** This routine converts from linear to ulaw. |
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757 ** |
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758 ** Craig Reese: IDA/Supercomputing Research Center |
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759 ** Joe Campbell: Department of Defense |
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760 ** 29 September 1989 |
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761 ** |
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762 ** References: |
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763 ** 1) CCITT Recommendation G.711 (very difficult to follow) |
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764 ** 2) "A New Digital Technique for Implementation of Any |
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765 ** Continuous PCM Companding Law," Villeret, Michel, |
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766 ** et al. 1973 IEEE Int. Conf. on Communications, Vol 1, |
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767 ** 1973, pg. 11.12-11.17 |
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768 ** 3) MIL-STD-188-113,"Interoperability and Performance Standards |
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769 ** for Analog-to_Digital Conversion Techniques," |
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770 ** 17 February 1987 |
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771 ** |
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772 ** Input: Signed 16 bit linear sample |
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773 ** Output: 8 bit ulaw sample |
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774 */ |
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775 |
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776 #define BIAS 0x84 /* define the add-in bias for 16 bit samples */ |
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777 #define CLIP 32635 |
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778 |
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779 int sign, exponent, mantissa; |
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780 Uint8 ulawbyte; |
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781 static const int exp_lut[256] = {0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3, |
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782 4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4, |
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783 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, |
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784 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, |
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785 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, |
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786 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, |
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787 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, |
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788 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, |
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789 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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790 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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791 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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792 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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793 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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794 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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795 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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796 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7}; |
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797 |
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798 /* Get the sample into sign-magnitude. */ |
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799 if (sample >= 0) |
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800 sign = 0; |
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801 else |
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802 { |
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803 sign = 0x80; |
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804 sample = -sample; |
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805 } /* else */ |
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806 |
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807 /* clip the magnitude */ |
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808 if (sample > CLIP) |
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809 sample = CLIP; |
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810 |
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811 /* Convert from 16 bit linear to ulaw. */ |
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812 sample = sample + BIAS; |
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813 exponent = exp_lut[( sample >> 7 ) & 0xFF]; |
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814 mantissa = (sample >> (exponent + 3)) & 0x0F; |
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815 ulawbyte = ~(sign | (exponent << 4) | mantissa); |
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816 |
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817 return(ulawbyte); |
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818 } /* Slinear2ulaw */ |
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819 |
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820 |
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821 /* this is derived from the Sun code - it is a bit simpler and has int input */ |
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822 #define QUANT_MASK (0xf) /* Quantization field mask. */ |
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823 #define NSEGS (8) /* Number of A-law segments. */ |
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824 #define SEG_SHIFT (4) /* Left shift for segment number. */ |
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825 |
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826 |
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827 static Uint8 Slinear2alaw(Sint32 linear) |
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828 { |
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829 int seg; |
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830 Uint8 aval, mask; |
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831 static const Sint32 seg_aend[NSEGS] = |
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832 { |
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833 0x1f,0x3f,0x7f,0xff,0x1ff,0x3ff,0x7ff,0xfff |
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834 }; |
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835 |
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836 linear >>= 3; |
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837 if(linear >= 0) |
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838 mask = 0xd5; /* sign (7th) bit = 1 */ |
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839 else |
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840 { |
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841 mask = 0x55; /* sign bit = 0 */ |
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842 linear = -linear - 1; |
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843 } /* else */ |
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844 |
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845 /* Convert the scaled magnitude to segment number. */ |
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846 for (seg = 0; (seg < NSEGS) && (linear > seg_aend[seg]); seg++); |
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847 |
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848 /* Combine the sign, segment, and quantization bits. */ |
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849 if (seg >= NSEGS) /* out of range, return maximum value. */ |
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850 return((Uint8) (0x7F ^ mask)); |
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851 |
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852 aval = (Uint8) seg << SEG_SHIFT; |
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853 if (seg < 2) |
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854 aval |= (linear >> 1) & QUANT_MASK; |
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855 else |
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856 aval |= (linear >> seg) & QUANT_MASK; |
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857 |
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858 return (aval ^ mask); |
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859 } /* Slinear2alaw */ |
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860 |
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861 |
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862 /* convert from signed ints to a given type and write */ |
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863 static Uint32 put_to_buffers(Sound_Sample *sample, Uint32 bw) |
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864 { |
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865 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; |
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866 shn_t *shn = (shn_t *) internal->decoder_private; |
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867 int i, chan; |
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868 Sint32 *data0 = shn->buffer[0]; |
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869 Sint32 nitem = shn->blocksize; |
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870 int datasize = ((sample->actual.format & 0xFF) / 8); |
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871 Uint32 bsiz = shn->nchan * nitem * datasize; |
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872 |
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873 assert(shn->backBufLeft == 0); |
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874 |
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875 if (shn->backBufferSize < bsiz) |
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876 { |
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877 void *rc = realloc(shn->backBuffer, bsiz); |
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878 if (rc == NULL) |
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879 { |
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880 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
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881 BAIL_MACRO(ERR_OUT_OF_MEMORY, 0); |
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882 } /* if */ |
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100
diff
changeset
|
883 shn->backBuffer = (Uint8 *) rc; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
884 shn->backBufferSize = bsiz; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
885 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
886 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
887 switch (shn->datatype) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
888 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
889 case SHN_TYPE_AU1: /* leave the conversion to fix_bitshift() */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
890 case SHN_TYPE_AU2: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
891 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
892 Uint8 *writebufp = shn->backBuffer; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
893 if (shn->nchan == 1) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
894 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
895 for (i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
896 *writebufp++ = data0[i]; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
897 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
898 else |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
899 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
900 for (i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
901 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
902 for (chan = 0; chan < shn->nchan; chan++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
903 *writebufp++ = shn->buffer[chan][i]; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
904 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
905 } /* else */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
906 } /* case */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
907 break; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
908 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
909 case SHN_TYPE_U8: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
910 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
911 Uint8 *writebufp = shn->backBuffer; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
912 if (shn->nchan == 1) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
913 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
914 for (i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
915 *writebufp++ = CAPMAXUCHAR(data0[i]); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
916 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
917 else |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
918 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
919 for (i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
920 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
921 for (chan = 0; chan < shn->nchan; chan++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
922 *writebufp++ = CAPMAXUCHAR(shn->buffer[chan][i]); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
923 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
924 } /* else */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
925 } /* case */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
926 break; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
927 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
928 case SHN_TYPE_S8: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
929 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
930 Sint8 *writebufp = (Sint8 *) shn->backBuffer; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
931 if (shn->nchan == 1) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
932 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
933 for(i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
934 *writebufp++ = CAPMAXSCHAR(data0[i]); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
935 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
936 else |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
937 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
938 for(i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
939 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
940 for(chan = 0; chan < shn->nchan; chan++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
941 *writebufp++ = CAPMAXSCHAR(shn->buffer[chan][i]); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
942 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
943 } /* else */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
944 } /* case */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
945 break; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
946 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
947 case SHN_TYPE_S16HL: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
948 case SHN_TYPE_S16LH: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
949 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
950 Sint16 *writebufp = (Sint16 *) shn->backBuffer; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
951 if (shn->nchan == 1) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
952 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
953 for (i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
954 *writebufp++ = CAPMAXSHORT(data0[i]); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
955 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
956 else |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
957 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
958 for (i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
959 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
960 for (chan = 0; chan < shn->nchan; chan++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
961 *writebufp++ = CAPMAXSHORT(shn->buffer[chan][i]); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
962 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
963 } /* else */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
964 } /* case */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
965 break; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
966 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
967 case SHN_TYPE_U16HL: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
968 case SHN_TYPE_U16LH: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
969 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
970 Uint16 *writebufp = (Uint16 *) shn->backBuffer; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
971 if (shn->nchan == 1) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
972 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
973 for (i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
974 *writebufp++ = CAPMAXUSHORT(data0[i]); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
975 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
976 else |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
977 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
978 for (i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
979 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
980 for (chan = 0; chan < shn->nchan; chan++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
981 *writebufp++ = CAPMAXUSHORT(shn->buffer[chan][i]); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
982 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
983 } /* else */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
984 } /* case */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
985 break; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
986 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
987 case SHN_TYPE_ULAW: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
988 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
989 Uint8 *writebufp = shn->backBuffer; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
990 if (shn->nchan == 1) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
991 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
992 for(i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
993 *writebufp++ = Slinear2ulaw(CAPMAXSHORT((data0[i] << 3))); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
994 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
995 else |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
996 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
997 for(i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
998 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
999 for(chan = 0; chan < shn->nchan; chan++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1000 *writebufp++ = Slinear2ulaw(CAPMAXSHORT((shn->buffer[chan][i] << 3))); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1001 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1002 } /* else */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1003 } /* case */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1004 break; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1005 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1006 case SHN_TYPE_AU3: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1007 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1008 Uint8 *writebufp = shn->backBuffer; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1009 if (shn->nchan == 1) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1010 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1011 for (i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1012 if(data0[i] < 0) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1013 *writebufp++ = (127 - data0[i]) ^ 0xd5; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1014 else |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1015 *writebufp++ = (data0[i] + 128) ^ 0x55; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1016 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1017 else |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1018 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1019 for (i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1020 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1021 for (chan = 0; chan < shn->nchan; chan++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1022 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1023 if (shn->buffer[chan][i] < 0) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1024 *writebufp++ = (127 - shn->buffer[chan][i]) ^ 0xd5; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1025 else |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1026 *writebufp++ = (shn->buffer[chan][i] + 128) ^ 0x55; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1027 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1028 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1029 } /* else */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1030 } /* case */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1031 break; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1032 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1033 case SHN_TYPE_ALAW: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1034 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1035 Uint8 *writebufp = shn->backBuffer; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1036 if (shn->nchan == 1) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1037 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1038 for (i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1039 *writebufp++ = Slinear2alaw(CAPMAXSHORT((data0[i] << 3))); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1040 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1041 else |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1042 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1043 for (i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1044 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1045 for(chan = 0; chan < shn->nchan; chan++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1046 *writebufp++ = Slinear2alaw(CAPMAXSHORT((shn->buffer[chan][i] << 3))); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1047 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1048 }/* else */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1049 } /* case */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1050 break; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1051 } /* switch */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1052 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1053 i = MIN_MACRO(internal->buffer_size - bw, bsiz); |
126 | 1054 memcpy((char *)internal->buffer + bw, shn->backBuffer, i); |
101
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1055 shn->backBufLeft = bsiz - i; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1056 memcpy(shn->backBuffer, shn->backBuffer + i, shn->backBufLeft); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1057 return(i); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1058 } /* put_to_buffers */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1059 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1060 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1061 #define ROUNDEDSHIFTDOWN(x, n) (((n) == 0) ? (x) : ((x) >> ((n) - 1)) >> 1) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1062 |
86 | 1063 static Uint32 SHN_read(Sound_Sample *sample) |
1064 { | |
101
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1065 Uint32 retval = 0; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1066 Sint32 chan = 0; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1067 Uint32 cpyBytes = 0; |
86 | 1068 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; |
101
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1069 SDL_RWops *rw = internal->rw; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1070 shn_t *shn = (shn_t *) internal->decoder_private; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1071 Sint32 cmd; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1072 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1073 assert(shn->backBufLeft >= 0); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1074 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1075 /* see if there are leftovers to copy... */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1076 if (shn->backBufLeft > 0) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1077 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1078 retval = MIN_MACRO(shn->backBufLeft, internal->buffer_size); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1079 memcpy(internal->buffer, shn->backBuffer, retval); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1080 shn->backBufLeft -= retval; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1081 memcpy(shn->backBuffer, shn->backBuffer + retval, shn->backBufLeft); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1082 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1083 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1084 assert((shn->backBufLeft == 0) || (retval == internal->buffer_size)); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1085 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1086 /* get commands from file and execute them */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1087 while (retval < internal->buffer_size) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1088 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1089 if (!uvar_get(SHN_FNSIZE, shn, rw, &cmd)) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1090 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1091 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1092 return(retval); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1093 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1094 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1095 if (cmd == SHN_FN_QUIT) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1096 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1097 sample->flags |= SOUND_SAMPLEFLAG_EOF; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1098 return(retval); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1099 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1100 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1101 switch(cmd) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1102 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1103 case SHN_FN_ZERO: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1104 case SHN_FN_DIFF0: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1105 case SHN_FN_DIFF1: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1106 case SHN_FN_DIFF2: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1107 case SHN_FN_DIFF3: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1108 case SHN_FN_QLPC: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1109 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1110 Sint32 i; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1111 Sint32 coffset, *cbuffer = shn->buffer[chan]; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1112 Sint32 resn = 0, nlpc, j; |
86 | 1113 |
101
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1114 if (cmd != SHN_FN_ZERO) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1115 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1116 if (!uvar_get(SHN_ENERGYSIZE, shn, rw, &resn)) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1117 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1118 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1119 return(retval); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1120 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1121 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1122 /* version 0 differed in definition of var_get */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1123 if (shn->version == 0) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1124 resn--; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1125 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1126 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1127 /* find mean offset : N.B. this code duplicated */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1128 if (shn->nmean == 0) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1129 coffset = shn->offset[chan][0]; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1130 else |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1131 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1132 Sint32 sum = (shn->version < 2) ? 0 : shn->nmean / 2; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1133 for (i = 0; i < shn->nmean; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1134 sum += shn->offset[chan][i]; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1135 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1136 if (shn->version < 2) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1137 coffset = sum / shn->nmean; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1138 else |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1139 coffset = ROUNDEDSHIFTDOWN(sum / shn->nmean, shn->bitshift); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1140 } /* else */ |
86 | 1141 |
101
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1142 switch (cmd) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1143 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1144 case SHN_FN_ZERO: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1145 for (i = 0; i < shn->blocksize; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1146 cbuffer[i] = 0; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1147 break; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1148 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1149 case SHN_FN_DIFF0: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1150 for(i = 0; i < shn->blocksize; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1151 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1152 if (!var_get(resn, shn, rw, &cbuffer[i])) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1153 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1154 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1155 return(retval); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1156 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1157 cbuffer[i] += coffset; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1158 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1159 break; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1160 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1161 case SHN_FN_DIFF1: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1162 for(i = 0; i < shn->blocksize; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1163 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1164 if (!var_get(resn, shn, rw, &cbuffer[i])) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1165 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1166 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1167 return(retval); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1168 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1169 cbuffer[i] += cbuffer[i - 1]; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1170 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1171 break; |
86 | 1172 |
101
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1173 case SHN_FN_DIFF2: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1174 for (i = 0; i < shn->blocksize; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1175 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1176 if (!var_get(resn, shn, rw, &cbuffer[i])) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1177 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1178 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1179 return(retval); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1180 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1181 cbuffer[i] += (2 * cbuffer[i-1] - cbuffer[i-2]); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1182 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1183 break; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1184 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1185 case SHN_FN_DIFF3: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1186 for (i = 0; i < shn->blocksize; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1187 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1188 if (!var_get(resn, shn, rw, &cbuffer[i])) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1189 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1190 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1191 return(retval); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1192 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1193 cbuffer[i] += 3 * (cbuffer[i - 1] - cbuffer[i - 2]) + cbuffer[i - 3]; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1194 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1195 break; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1196 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1197 case SHN_FN_QLPC: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1198 if (!uvar_get(SHN_LPCQSIZE, shn, rw, &nlpc)) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1199 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1200 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1201 return(retval); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1202 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1203 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1204 for(i = 0; i < nlpc; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1205 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1206 if (!var_get(SHN_LPCQUANT, shn, rw, &shn->qlpc[i])) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1207 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1208 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1209 return(retval); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1210 } /* if */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1211 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1212 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1213 for(i = 0; i < nlpc; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1214 cbuffer[i - nlpc] -= coffset; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1215 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1216 for(i = 0; i < shn->blocksize; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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|
1217 { |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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1218 Sint32 sum = shn->lpcqoffset; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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1219 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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1220 for(j = 0; j < nlpc; j++) |
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1221 sum += shn->qlpc[j] * cbuffer[i - j - 1]; |
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1222 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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1223 if (!var_get(resn, shn, rw, &cbuffer[i])) |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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1224 { |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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1225 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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1226 return(retval); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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1227 } /* if */ |
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1228 cbuffer[i] += (sum >> SHN_LPCQUANT); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
1229 } /* for */ |
86 | 1230 |
101
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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1231 if (coffset != 0) |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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1232 { |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
1233 for(i = 0; i < shn->blocksize; i++) |
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1234 cbuffer[i] += coffset; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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1235 } /* if */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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1236 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
1237 break; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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1238 } /* switch */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
1239 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
1240 /* store mean value if appropriate : N.B. Duplicated code */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
1241 if (shn->nmean > 0) |
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|
1242 { |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
1243 Sint32 sum = (shn->version < 2) ? 0 : shn->blocksize / 2; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
1244 for (i = 0; i < shn->blocksize; i++) |
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|
1245 sum += cbuffer[i]; |
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1246 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
1247 for(i = 1; i < shn->nmean; i++) |
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|
1248 shn->offset[chan][i - 1] = shn->offset[chan][i]; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
1249 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
1250 if (shn->version < 2) |
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|
1251 shn->offset[chan][shn->nmean - 1] = sum / shn->blocksize; |
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1252 else |
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|
1253 shn->offset[chan][shn->nmean - 1] = (sum / shn->blocksize) << shn->bitshift; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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1254 } /* if */ |
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1255 |
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|
1256 /* do the wrap */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
1257 for(i = -shn->nwrap; i < 0; i++) |
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|
1258 cbuffer[i] = cbuffer[i + shn->blocksize]; |
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1259 |
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1260 fix_bitshift(cbuffer, shn->blocksize, shn->bitshift, shn->datatype); |
86 | 1261 |
101
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1262 if (chan == shn->nchan - 1) |
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1263 { |
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|
1264 retval += put_to_buffers(sample, retval); |
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1265 if (sample->flags & SOUND_SAMPLEFLAG_ERROR) |
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1266 return(retval); |
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1267 } /* if */ |
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1268 |
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1269 chan = (chan + 1) % shn->nchan; |
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1270 break; |
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1271 } /* case */ |
86 | 1272 |
101
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1273 case SHN_FN_BLOCKSIZE: |
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1274 if (!uint_get((int) (log((double) shn->blocksize) / M_LN2), |
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|
1275 shn, rw, &shn->blocksize)) |
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1276 { |
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1277 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
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1278 return(retval); |
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|
1279 } /* if */ |
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|
1280 break; |
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|
1281 |
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|
1282 case SHN_FN_BITSHIFT: |
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1283 if (!uvar_get(SHN_BITSHIFTSIZE, shn, rw, &shn->bitshift)) |
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|
1284 { |
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|
1285 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
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|
1286 return(retval); |
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|
1287 } /* if */ |
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|
1288 break; |
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|
1289 |
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|
1290 case SHN_FN_VERBATIM: |
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1291 default: |
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1292 Sound_SetError("SHN: Unhandled function."); |
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1293 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
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1294 return(retval); |
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|
1295 } /* switch */ |
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1296 } /* while */ |
86 | 1297 |
1298 return(retval); | |
1299 } /* SHN_read */ | |
1300 | |
221
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Initial implementation or stubs for rewind method. Other cleanups.
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|
1301 |
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1302 static int SHN_rewind(Sound_Sample *sample) |
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1303 { |
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|
1304 /* !!! FIXME. */ |
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1305 SNDDBG(("SHN_rewind(): Write me!\n")); |
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1306 assert(0); |
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1307 return(0); |
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1308 } /* SHN_rewind */ |
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1309 |
86 | 1310 #endif /* defined SOUND_SUPPORTS_SHN */ |
1311 | |
1312 /* end of shn.c ... */ | |
1313 |