Mercurial > SDL_sound_CoreAudio
annotate decoders/shn.c @ 562:7e08477b0fc1
MP3 decoder upgrade work.
Ripped out SMPEG and mpglib support, replaced it with "mpg123.c" and libmpg123.
libmpg123 is a much better version of mpglib, so it should solve all the
problems about MP3's not seeking, or most modern MP3's not playing at all,
etc. Since you no longer have to make a tradeoff with SMPEG for features, and
SMPEG is basically rotting, I removed it from the project.
There is still work to be done with libmpg123...there are MMX, 3DNow, SSE,
Altivec, etc decoders which we don't have enabled at the moment, and the
build system could use some work to make this compile more cleanly, etc.
Still: huge win.
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Fri, 30 Jan 2009 02:44:47 -0500 |
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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 LICENSE.txt in the source's root directory. |
86 | 40 * |
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41 * This file written by Ryan C. Gordon. (icculus@icculus.org) |
86 | 42 */ |
43 | |
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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> | |
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53 #include <math.h> |
86 | 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 |
86 | 60 static int SHN_init(void); |
61 static void SHN_quit(void); | |
62 static int SHN_open(Sound_Sample *sample, const char *ext); | |
63 static void SHN_close(Sound_Sample *sample); | |
64 static Uint32 SHN_read(Sound_Sample *sample); | |
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65 static int SHN_rewind(Sound_Sample *sample); |
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66 static int SHN_seek(Sound_Sample *sample, Uint32 ms); |
86 | 67 |
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68 static const char *extensions_shn[] = { "SHN", NULL }; |
86 | 69 const Sound_DecoderFunctions __Sound_DecoderFunctions_SHN = |
70 { | |
71 { | |
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72 extensions_shn, |
86 | 73 "Shorten-compressed audio data", |
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74 "Ryan C. Gordon <icculus@icculus.org>", |
86 | 75 "http://www.icculus.org/SDL_sound/" |
76 }, | |
77 | |
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78 SHN_init, /* init() method */ |
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79 SHN_quit, /* quit() method */ |
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80 SHN_open, /* open() method */ |
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81 SHN_close, /* close() method */ |
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82 SHN_read, /* read() method */ |
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83 SHN_rewind, /* rewind() method */ |
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84 SHN_seek /* seek() method */ |
86 | 85 }; |
86 | |
87 | |
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88 #define SHN_BUFSIZ 512 |
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89 |
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90 typedef struct |
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91 { |
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92 Sint32 version; |
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93 Sint32 datatype; |
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94 Sint32 nchan; |
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95 Sint32 blocksize; |
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96 Sint32 maxnlpc; |
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97 Sint32 nmean; |
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98 Sint32 nwrap; |
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99 Sint32 **buffer; |
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100 Sint32 **offset; |
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101 Sint32 *qlpc; |
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102 Sint32 lpcqoffset; |
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103 Sint32 bitshift; |
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104 int nbitget; |
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105 int nbyteget; |
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106 Uint8 *getbuf; |
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107 Uint8 *getbufp; |
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108 Uint32 gbuffer; |
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109 Uint8 *backBuffer; |
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110 Uint32 backBufferSize; |
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111 Uint32 backBufLeft; |
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112 Uint32 start_pos; |
101
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113 } shn_t; |
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114 |
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115 |
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116 static const Uint32 mask_table[] = |
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117 { |
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118 0x00000000, 0x00000001, 0x00000003, 0x00000007, 0x0000000F, 0x0000001F, |
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119 0x0000003F, 0x0000007F, 0x000000FF, 0x000001FF, 0x000003FF, 0x000007FF, |
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120 0x00000FFF, 0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF, 0x0001FFFF, |
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121 0x0003FFFF, 0x0007FFFF, 0x000FFFFF, 0x001FFFFF, 0x003FFFFF, 0x007FFFFF, |
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122 0x00FFFFFF, 0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF, 0x0FFFFFFF, 0x1FFFFFFF, |
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123 0x3FFFFFFF, 0x7FFFFFFF, 0xFFFFFFFF |
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124 }; |
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125 |
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126 |
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127 static const Uint8 ulaw_outward[13][256] = { |
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128 {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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129 {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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130 {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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131 {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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132 {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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133 {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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134 {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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135 {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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136 {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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137 {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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138 {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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139 {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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140 {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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141 }; |
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142 |
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143 |
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144 #ifndef MIN_MACRO |
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145 #define MIN_MACRO(a,b) (((a)<(b))?(a):(b)) |
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146 #endif |
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147 |
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148 #ifndef MAX_MACRO |
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149 #define MAX_MACRO(a,b) (((a)>(b))?(a):(b)) |
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150 #endif |
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151 |
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152 #define POSITIVE_ULAW_ZERO 0xff |
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153 #define NEGATIVE_ULAW_ZERO 0x7f |
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154 |
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155 #define CAPMAXSCHAR(x) ((x > 127) ? 127 : x) |
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156 #define CAPMAXUCHAR(x) ((x > 255) ? 255 : x) |
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157 #define CAPMAXSHORT(x) ((x > 32767) ? 32767 : x) |
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158 #define CAPMAXUSHORT(x) ((x > 65535) ? 65535 : x) |
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159 |
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160 #define UNDEFINED_UINT -1 |
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161 #define DEFAULT_BLOCK_SIZE 256 |
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162 #define DEFAULT_V0NMEAN 0 |
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163 #define DEFAULT_V2NMEAN 4 |
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164 #define DEFAULT_MAXNLPC 0 |
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165 #define DEFAULT_NCHAN 1 |
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166 #define DEFAULT_NSKIP 0 |
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167 #define DEFAULT_NDISCARD 0 |
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168 #define NBITPERLONG 32 |
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169 #define DEFAULT_MINSNR 256 |
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170 #define DEFAULT_QUANTERROR 0 |
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171 #define MINBITRATE 2.5 |
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172 |
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173 #define MEAN_VERSION0 0 |
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174 #define MEAN_VERSION2 4 |
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175 |
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176 #define SHN_FN_DIFF0 0 |
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177 #define SHN_FN_DIFF1 1 |
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178 #define SHN_FN_DIFF2 2 |
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179 #define SHN_FN_DIFF3 3 |
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180 #define SHN_FN_QUIT 4 |
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181 #define SHN_FN_BLOCKSIZE 5 |
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182 #define SHN_FN_BITSHIFT 6 |
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183 #define SHN_FN_QLPC 7 |
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184 #define SHN_FN_ZERO 8 |
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185 #define SHN_FN_VERBATIM 9 |
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186 |
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187 #define SHN_TYPE_AU1 0 |
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188 #define SHN_TYPE_S8 1 |
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189 #define SHN_TYPE_U8 2 |
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190 #define SHN_TYPE_S16HL 3 |
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191 #define SHN_TYPE_U16HL 4 |
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192 #define SHN_TYPE_S16LH 5 |
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193 #define SHN_TYPE_U16LH 6 |
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194 #define SHN_TYPE_ULAW 7 |
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195 #define SHN_TYPE_AU2 8 |
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196 #define SHN_TYPE_AU3 9 |
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197 #define SHN_TYPE_ALAW 10 |
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198 #define SHN_TYPE_RIFF_WAVE 11 |
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199 #define SHN_TYPE_EOF 12 |
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200 #define SHN_TYPE_GENERIC_ULAW 128 |
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201 #define SHN_TYPE_GENERIC_ALAW 129 |
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202 |
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203 #define SHN_FNSIZE 2 |
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204 #define SHN_CHANNELSIZE 0 |
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205 #define SHN_TYPESIZE 4 |
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206 #define SHN_ULONGSIZE 2 |
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207 #define SHN_NSKIPSIZE 1 |
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208 #define SHN_LPCQSIZE 2 |
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209 #define SHN_LPCQUANT 5 |
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210 #define SHN_XBYTESIZE 7 |
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211 #define SHN_VERBATIM_CKSIZE_SIZE 5 |
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212 #define SHN_VERBATIM_BYTE_SIZE 8 |
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213 #define SHN_ENERGYSIZE 3 |
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214 #define SHN_BITSHIFTSIZE 2 |
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215 |
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216 #define SHN_LPCQOFFSET_VER2 (1 << SHN_LPCQUANT) |
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217 |
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218 |
212
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219 #define SHN_MAGIC 0x676B6A61 /* looks like "ajkg" as chars. */ |
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220 |
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221 #ifndef M_LN2 |
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222 #define M_LN2 0.69314718055994530942 |
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223 #endif |
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224 |
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225 #ifndef M_PI |
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226 #define M_PI 3.14159265358979323846 |
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227 #endif |
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228 |
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229 |
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230 static int word_get(shn_t *shn, SDL_RWops *rw, Uint32 *word) |
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231 { |
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232 if (shn->nbyteget < 4) |
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233 { |
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234 shn->nbyteget += SDL_RWread(rw, shn->getbuf, 1, SHN_BUFSIZ); |
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235 BAIL_IF_MACRO(shn->nbyteget < 4, NULL, 0); |
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236 shn->getbufp = shn->getbuf; |
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237 } /* if */ |
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238 |
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239 if (word != NULL) |
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240 { |
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241 *word = (((Sint32) shn->getbufp[0]) << 24) | |
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242 (((Sint32) shn->getbufp[1]) << 16) | |
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243 (((Sint32) shn->getbufp[2]) << 8) | |
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244 (((Sint32) shn->getbufp[3]) ); |
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245 } /* if */ |
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246 |
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247 shn->getbufp += 4; |
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248 shn->nbyteget -= 4; |
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249 |
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250 return(1); |
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251 } /* word_get */ |
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252 |
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253 |
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254 static int uvar_get(int nbin, shn_t *shn, SDL_RWops *rw, Sint32 *word) |
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255 { |
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256 Sint32 result; |
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257 |
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258 if (shn->nbitget == 0) |
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259 { |
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260 BAIL_IF_MACRO(!word_get(shn, rw, &shn->gbuffer), NULL, 0); |
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261 shn->nbitget = 32; |
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262 } /* if */ |
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263 |
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264 for (result = 0; !(shn->gbuffer & (1L << --shn->nbitget)); result++) |
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265 { |
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266 if (shn->nbitget == 0) |
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267 { |
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268 BAIL_IF_MACRO(!word_get(shn, rw, &shn->gbuffer), NULL, 0); |
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269 shn->nbitget = 32; |
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270 } /* if */ |
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271 } /* for */ |
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272 |
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273 while (nbin != 0) |
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274 { |
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275 if (shn->nbitget >= nbin) |
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276 { |
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277 result = ( (result << nbin) | |
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278 ((shn->gbuffer >> (shn->nbitget - nbin)) & |
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279 mask_table[nbin]) ); |
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280 shn->nbitget -= nbin; |
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281 break; |
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282 } /* if */ |
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283 else |
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284 { |
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285 result = (result << shn->nbitget) | |
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286 (shn->gbuffer & mask_table[shn->nbitget]); |
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287 BAIL_IF_MACRO(!word_get(shn, rw, &shn->gbuffer), NULL, 0); |
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288 nbin -= shn->nbitget; |
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289 shn->nbitget = 32; |
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290 } /* else */ |
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291 } /* while */ |
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292 |
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293 if (word != NULL) |
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294 *word = result; |
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295 |
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296 return(1); |
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297 } /* uvar_get */ |
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298 |
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299 |
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300 static int var_get(int nbin, shn_t *shn, SDL_RWops *rw, Sint32 *word) |
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301 { |
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302 BAIL_IF_MACRO(!uvar_get(nbin + 1, shn, rw, word), NULL, 0); |
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303 |
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304 if ((*word) & 1) |
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305 *word = (Sint32) ~((*word) >> 1); |
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306 else |
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307 *word = (Sint32) ((*word) >> 1); |
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308 |
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309 return(1); |
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310 } /* var_get */ |
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311 |
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312 |
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313 static int ulong_get(shn_t *shn, SDL_RWops *rw, Sint32 *word) |
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314 { |
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315 Sint32 nbit; |
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316 Sint32 retval; |
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317 BAIL_IF_MACRO(!uvar_get(SHN_ULONGSIZE, shn, rw, &nbit), NULL, 0); |
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318 BAIL_IF_MACRO(!uvar_get(nbit, shn, rw, &retval), NULL, 0); |
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319 |
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320 if (word != NULL) |
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321 *word = retval; |
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322 |
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323 return(1); |
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324 } /* ulong_get */ |
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325 |
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326 |
401
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327 static __inline__ int uint_get(int nbit, shn_t *shn, SDL_RWops *rw, Sint32 *w) |
101
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328 { |
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329 return((shn->version == 0) ? |
401
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330 uvar_get(nbit, shn, rw, w) : |
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331 ulong_get(shn, rw, w)); |
101
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332 } /* uint_get */ |
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333 |
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334 |
86 | 335 static int SHN_init(void) |
336 { | |
337 return(1); /* initialization always successful. */ | |
338 } /* SHN_init */ | |
339 | |
340 | |
341 static void SHN_quit(void) | |
342 { | |
343 /* it's a no-op. */ | |
344 } /* SHN_quit */ | |
345 | |
346 | |
347 /* | |
348 * Look through the whole file for a SHN magic number. This is costly, so | |
349 * it should only be done if the user SWEARS they have a Shorten stream... | |
350 */ | |
401
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351 static __inline__ int extended_shn_magic_search(Sound_Sample *sample) |
86 | 352 { |
353 SDL_RWops *rw = ((Sound_SampleInternal *) sample->opaque)->rw; | |
354 Uint32 word = 0; | |
355 Uint8 ch; | |
356 | |
357 while (1) | |
358 { | |
359 BAIL_IF_MACRO(SDL_RWread(rw, &ch, sizeof (ch), 1) != 1, NULL, -1); | |
360 word = ((word << 8) & 0xFFFFFF00) | ch; | |
212
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361 if (SDL_SwapBE32(word) == SHN_MAGIC) |
86 | 362 { |
363 BAIL_IF_MACRO(SDL_RWread(rw, &ch, sizeof (ch), 1) != 1, NULL, -1); | |
364 return((int) ch); | |
365 } /* if */ | |
366 } /* while */ | |
367 | |
368 return((int) ch); | |
369 } /* extended_shn_magic_search */ | |
370 | |
371 | |
372 /* look for the magic number in the RWops and see what kind of file this is. */ | |
401
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373 static __inline__ int determine_shn_version(Sound_Sample *sample, |
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374 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 | |
242
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400 static void init_shn_offset(Sint32 **offset, int nchan, int nblock, int ftype) |
101
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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: |
387
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425 __Sound_SetError("SHN: unknown file type"); |
245
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426 return; |
101
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427 } /* switch */ |
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428 |
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429 for(chan = 0; chan < nchan; chan++) |
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430 { |
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431 int i; |
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432 for(i = 0; i < nblock; i++) |
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433 offset[chan][i] = mean; |
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434 } /* for */ |
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435 } /* init_shn_offset */ |
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436 |
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437 |
401
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438 static __inline__ Uint16 cvt_shnftype_to_sdlfmt(Sint16 shntype) |
101
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439 { |
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440 switch (shntype) |
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441 { |
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442 case SHN_TYPE_S8: |
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443 return(AUDIO_S8); |
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444 |
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445 case SHN_TYPE_ALAW: |
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446 case SHN_TYPE_ULAW: |
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447 case SHN_TYPE_AU1: |
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448 case SHN_TYPE_AU2: |
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449 case SHN_TYPE_AU3: |
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450 case SHN_TYPE_U8: |
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451 return(AUDIO_U8); |
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452 |
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453 case SHN_TYPE_S16HL: |
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454 return(AUDIO_S16MSB); |
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455 |
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456 case SHN_TYPE_S16LH: |
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457 return(AUDIO_S16LSB); |
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458 |
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459 case SHN_TYPE_U16HL: |
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460 return(AUDIO_U16MSB); |
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461 |
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462 case SHN_TYPE_U16LH: |
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463 return(AUDIO_U16LSB); |
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464 } /* switch */ |
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465 |
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466 return(0); |
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467 } /* cvt_shnftype_to_sdlfmt */ |
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468 |
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469 |
401
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470 static __inline__ int skip_bits(shn_t *shn, SDL_RWops *rw) |
101
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471 { |
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472 int i; |
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473 Sint32 skip; |
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474 Sint32 trash; |
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475 |
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476 BAIL_IF_MACRO(!uint_get(SHN_NSKIPSIZE, shn, rw, &skip), NULL, 0); |
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477 for(i = 0; i < skip; i++) |
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478 { |
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479 BAIL_IF_MACRO(!uint_get(SHN_XBYTESIZE, shn, rw, &trash), NULL, 0); |
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480 } /* for */ |
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481 |
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482 return(1); |
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483 } /* skip_bits */ |
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484 |
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485 |
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486 static Sint32 **shn_long2d(Uint32 n0, Uint32 n1) |
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487 { |
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488 Sint32 **array0; |
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489 Uint32 size = (n0 * sizeof (Sint32 *)) + (n0 * n1 * sizeof (Sint32)); |
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490 |
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491 array0 = (Sint32 **) malloc(size); |
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492 if (array0 != NULL) |
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493 { |
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494 int i; |
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495 Sint32 *array1 = (Sint32 *) (array0 + n0); |
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496 for(i = 0; i < n0; i++) |
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497 array0[i] = array1 + (i * n1); |
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498 } /* if */ |
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499 |
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500 return(array0); |
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501 } /* shn_long2d */ |
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502 |
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503 #define riffID 0x46464952 /* "RIFF", in ascii. */ |
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504 #define waveID 0x45564157 /* "WAVE", in ascii. */ |
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505 #define fmtID 0x20746D66 /* "fmt ", in ascii. */ |
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506 #define dataID 0x61746164 /* "data", in ascii. */ |
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507 |
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508 static int verb_ReadLE32(shn_t *shn, SDL_RWops *rw, Uint32 *word) |
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509 { |
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510 int i; |
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511 Uint8 chars[4]; |
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512 Sint32 byte; |
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513 |
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514 for (i = 0; i < 4; i++) |
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515 { |
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516 if (!uvar_get(SHN_VERBATIM_BYTE_SIZE, shn, rw, &byte)) |
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517 return(0); |
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518 chars[i] = (Uint8) byte; |
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519 } /* for */ |
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520 |
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521 memcpy(word, chars, sizeof (*word)); |
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522 *word = SDL_SwapLE32(*word); |
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523 |
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524 return(1); |
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525 } /* verb_ReadLE32 */ |
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526 |
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|
527 |
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528 static int verb_ReadLE16(shn_t *shn, SDL_RWops *rw, Uint16 *word) |
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529 { |
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530 int i; |
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531 Uint8 chars[2]; |
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532 Sint32 byte; |
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533 |
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534 for (i = 0; i < 2; i++) |
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535 { |
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536 if (!uvar_get(SHN_VERBATIM_BYTE_SIZE, shn, rw, &byte)) |
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537 return(0); |
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538 chars[i] = (Uint8) byte; |
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539 } /* for */ |
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|
540 |
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|
541 memcpy(word, chars, sizeof (*word)); |
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|
542 *word = SDL_SwapLE16(*word); |
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543 |
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|
544 return(1); |
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545 } /* verb_ReadLE16 */ |
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546 |
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547 |
401
c42ac9ee2ce4
Fixed "inline" keyword to compile.
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548 static __inline__ int parse_riff_header(shn_t *shn, Sound_Sample *sample) |
101
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549 { |
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550 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; |
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551 SDL_RWops *rw = internal->rw; |
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552 Uint16 u16; |
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553 Uint32 u32; |
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554 Sint32 cklen; |
474
c66080364dff
Most decoders now report total sample play time, now. Technically, this
Ryan C. Gordon <icculus@icculus.org>
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555 Uint32 bytes_per_second; |
101
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556 |
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557 BAIL_IF_MACRO(!uvar_get(SHN_VERBATIM_CKSIZE_SIZE, shn, rw, &cklen), NULL, 0); |
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558 |
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559 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* RIFF header */ |
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560 BAIL_IF_MACRO(u32 != riffID, "SHN: No RIFF header.", 0); |
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561 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* length */ |
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562 |
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563 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* WAVE header */ |
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564 BAIL_IF_MACRO(u32 != waveID, "SHN: No WAVE header.", 0); |
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565 |
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566 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* 'fmt ' header */ |
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567 BAIL_IF_MACRO(u32 != fmtID, "SHN: No 'fmt ' header.", 0); |
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568 |
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569 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* chunksize */ |
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570 BAIL_IF_MACRO(!verb_ReadLE16(shn, rw, &u16), NULL, 0); /* format */ |
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571 BAIL_IF_MACRO(!verb_ReadLE16(shn, rw, &u16), NULL, 0); /* channels */ |
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572 sample->actual.channels = u16; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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573 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* sample rate */ |
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574 sample->actual.rate = u32; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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575 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
576 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* bytespersec */ |
474
c66080364dff
Most decoders now report total sample play time, now. Technically, this
Ryan C. Gordon <icculus@icculus.org>
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577 bytes_per_second = u32; |
101
c08794028df4
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578 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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579 BAIL_IF_MACRO(!verb_ReadLE16(shn, rw, &u16), NULL, 0); /* bitspersample */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
580 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
581 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* 'data' header */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
582 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
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|
583 BAIL_IF_MACRO(!verb_ReadLE32(shn, rw, &u32), NULL, 0); /* chunksize */ |
477
3e705c9180e5
Fixed binary compatibility, added Sound_GetDuration().
Ryan C. Gordon <icculus@icculus.org>
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474
diff
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|
584 internal->total_time = u32 / bytes_per_second * 1000; |
3e705c9180e5
Fixed binary compatibility, added Sound_GetDuration().
Ryan C. Gordon <icculus@icculus.org>
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|
585 internal->total_time += (u32 % bytes_per_second) * 1000 / bytes_per_second; |
101
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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586 return(1); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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587 } /* parse_riff_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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588 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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589 |
86 | 590 static int SHN_open(Sound_Sample *sample, const char *ext) |
591 { | |
592 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
593 SDL_RWops *rw = internal->rw; | |
101
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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594 shn_t _shn; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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595 shn_t *shn = &_shn; /* malloc and copy later. */ |
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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 Sint32 cmd; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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597 Sint32 chan; |
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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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|
598 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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599 memset(shn, '\0', sizeof (shn_t)); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
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600 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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100
diff
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|
601 shn->datatype = SHN_TYPE_EOF; |
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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|
602 shn->nchan = DEFAULT_NCHAN; |
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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|
603 shn->blocksize = DEFAULT_BLOCK_SIZE; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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|
604 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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100
diff
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|
605 shn->nmean = UNDEFINED_UINT; |
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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|
606 shn->version = determine_shn_version(sample, ext); |
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
changeset
|
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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100
diff
changeset
|
608 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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|
609 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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diff
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|
610 if (!uint_get(SHN_CHANNELSIZE, shn, rw, &shn->nchan)) 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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diff
changeset
|
611 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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|
612 sample->actual.format = cvt_shnftype_to_sdlfmt(shn->datatype); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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|
613 if (sample->actual.format == 0) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
changeset
|
614 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
615 SDL_SetError(ERR_UNSUPPORTED_FORMAT); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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|
616 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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617 } /* if */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
changeset
|
618 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
changeset
|
619 if (shn->version > 0) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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|
620 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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|
621 int rc = uint_get((int) (log((double) DEFAULT_BLOCK_SIZE) / M_LN2), |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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622 shn, rw, &shn->blocksize); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
changeset
|
623 if (!rc) 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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diff
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|
624 if (!uint_get(SHN_LPCQSIZE, shn, rw, &shn->maxnlpc)) 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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diff
changeset
|
625 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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diff
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|
626 if (!skip_bits(shn, rw)) 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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627 } /* else */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
changeset
|
628 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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629 shn->nwrap = (shn->maxnlpc > 3) ? shn->maxnlpc : 3; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
changeset
|
630 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
changeset
|
631 /* grab some space for the input buffer */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
632 shn->buffer = shn_long2d((Uint32) shn->nchan, shn->blocksize + shn->nwrap); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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|
633 shn->offset = shn_long2d((Uint32) shn->nchan, MAX_MACRO(1, shn->nmean)); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
changeset
|
634 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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|
635 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>
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diff
changeset
|
636 { |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
637 int i; |
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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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|
638 for(i = 0; i < shn->nwrap; 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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diff
changeset
|
639 shn->buffer[chan][i] = 0; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
changeset
|
640 shn->buffer[chan] += shn->nwrap; |
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
changeset
|
641 } /* for */ |
86 | 642 |
101
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
changeset
|
643 if (shn->maxnlpc > 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
|
644 { |
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
changeset
|
645 shn->qlpc = (int *) malloc((Uint32) (shn->maxnlpc * sizeof (Sint32))); |
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
changeset
|
646 if (shn->qlpc == NULL) |
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
changeset
|
647 { |
387
fb519e6028e3
Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
Ryan C. Gordon <icculus@icculus.org>
parents:
377
diff
changeset
|
648 __Sound_SetError(ERR_OUT_OF_MEMORY); |
101
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
changeset
|
649 goto shn_open_puke; |
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650 } /* if */ |
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651 } /* if */ |
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652 |
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653 if (shn->version > 1) |
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654 shn->lpcqoffset = SHN_LPCQOFFSET_VER2; |
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655 |
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656 init_shn_offset(shn->offset, shn->nchan, |
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657 MAX_MACRO(1, shn->nmean), shn->datatype); |
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|
658 |
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659 if ( (!uvar_get(SHN_FNSIZE, shn, rw, &cmd)) || |
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660 (cmd != SHN_FN_VERBATIM) || |
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661 (!parse_riff_header(shn, sample)) ) |
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662 { |
387
fb519e6028e3
Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
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663 if (cmd != SHN_FN_VERBATIM) /* the other conditions set error state */ |
fb519e6028e3
Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
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664 __Sound_SetError("SHN: Expected VERBATIM function"); |
101
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665 |
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666 goto shn_open_puke; |
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667 return(0); |
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668 } /* if */ |
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669 |
233
15a3b1a1291c
Kludged implementation of the rewind method.
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670 shn->start_pos = SDL_RWtell(rw); |
15a3b1a1291c
Kludged implementation of the rewind method.
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671 |
101
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672 shn = (shn_t *) malloc(sizeof (shn_t)); |
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673 if (shn == NULL) |
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674 { |
387
fb519e6028e3
Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
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|
675 __Sound_SetError(ERR_OUT_OF_MEMORY); |
101
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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676 goto shn_open_puke; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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677 } /* if */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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678 |
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679 memcpy(shn, &_shn, sizeof (shn_t)); |
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680 internal->decoder_private = shn; |
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681 |
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682 SNDDBG(("SHN: Accepting data stream.\n")); |
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683 sample->flags = SOUND_SAMPLEFLAG_NONE; |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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684 return(1); /* we'll handle this data. */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
685 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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686 shn_open_puke: |
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687 if (_shn.getbuf) |
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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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|
688 free(_shn.getbuf); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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689 if (_shn.buffer != NULL) |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
690 free(_shn.buffer); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
691 if (_shn.offset != NULL) |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
692 free(_shn.offset); |
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693 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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|
694 free(_shn.qlpc); |
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|
695 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
696 return(0); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
697 } /* SHN_open */ |
86 | 698 |
699 | |
233
15a3b1a1291c
Kludged implementation of the rewind method.
Ryan C. Gordon <icculus@icculus.org>
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221
diff
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|
700 static void fix_bitshift(Sint32 *buffer, int nitem, int bitshift, int ftype) |
101
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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701 { |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
702 int i; |
86 | 703 |
101
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
704 if (ftype == SHN_TYPE_AU1) |
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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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|
705 { |
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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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|
706 for (i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
707 buffer[i] = ulaw_outward[bitshift][buffer[i] + 128]; |
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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|
708 } /* if */ |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
709 else if (ftype == SHN_TYPE_AU2) |
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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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|
710 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
711 for(i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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|
712 { |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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100
diff
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|
713 if (buffer[i] >= 0) |
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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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|
714 buffer[i] = ulaw_outward[bitshift][buffer[i] + 128]; |
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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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|
715 else if (buffer[i] == -1) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
716 buffer[i] = NEGATIVE_ULAW_ZERO; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
717 else |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
718 buffer[i] = ulaw_outward[bitshift][buffer[i] + 129]; |
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|
719 } /* for */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
720 } /* else if */ |
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|
721 else |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
changeset
|
722 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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|
723 if (bitshift != 0) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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100
diff
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|
724 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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|
725 for(i = 0; i < nitem; i++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
726 buffer[i] <<= bitshift; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
727 } /* if */ |
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|
728 } /* else */ |
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|
729 } /* fix_bitshift */ |
86 | 730 |
731 | |
732 static void SHN_close(Sound_Sample *sample) | |
733 { | |
734 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
101
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
735 shn_t *shn = (shn_t *) internal->decoder_private; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
736 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
737 if (shn->qlpc != NULL) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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100
diff
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|
738 free(shn->qlpc); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
739 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
740 if (shn->backBuffer != NULL) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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diff
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|
741 free(shn->backBuffer); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
742 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
743 if (shn->offset != NULL) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
744 free(shn->offset); |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
745 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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changeset
|
746 if (shn->buffer != NULL) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
747 free(shn->buffer); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
748 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
749 if (shn->getbuf != NULL) |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
750 free(shn->getbuf); |
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|
751 |
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
752 free(shn); |
86 | 753 } /* SHN_close */ |
754 | |
755 | |
101
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Fully implemented. Needs testing, but it works on the Grateful Dead show I
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|
756 /* xLaw conversions... */ |
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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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|
757 |
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|
758 /* adapted by ajr for int input */ |
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|
759 static Uint8 Slinear2ulaw(int sample) |
c08794028df4
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|
760 { |
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|
761 /* |
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|
762 ** This routine converts from linear to ulaw. |
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|
763 ** |
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|
764 ** Craig Reese: IDA/Supercomputing Research Center |
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|
765 ** Joe Campbell: Department of Defense |
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|
766 ** 29 September 1989 |
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767 ** |
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|
768 ** References: |
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|
769 ** 1) CCITT Recommendation G.711 (very difficult to follow) |
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770 ** 2) "A New Digital Technique for Implementation of Any |
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771 ** Continuous PCM Companding Law," Villeret, Michel, |
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772 ** et al. 1973 IEEE Int. Conf. on Communications, Vol 1, |
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773 ** 1973, pg. 11.12-11.17 |
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774 ** 3) MIL-STD-188-113,"Interoperability and Performance Standards |
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775 ** for Analog-to_Digital Conversion Techniques," |
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776 ** 17 February 1987 |
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777 ** |
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778 ** Input: Signed 16 bit linear sample |
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779 ** Output: 8 bit ulaw sample |
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780 */ |
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781 |
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782 #define BIAS 0x84 /* define the add-in bias for 16 bit samples */ |
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783 #define CLIP 32635 |
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784 |
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785 int sign, exponent, mantissa; |
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786 Uint8 ulawbyte; |
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787 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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788 4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4, |
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789 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, |
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790 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, |
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791 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, |
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792 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, |
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793 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, |
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794 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, |
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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 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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798 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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799 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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800 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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801 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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802 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7}; |
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803 |
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804 /* Get the sample into sign-magnitude. */ |
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805 if (sample >= 0) |
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806 sign = 0; |
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807 else |
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808 { |
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809 sign = 0x80; |
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810 sample = -sample; |
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811 } /* else */ |
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812 |
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813 /* clip the magnitude */ |
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814 if (sample > CLIP) |
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815 sample = CLIP; |
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816 |
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817 /* Convert from 16 bit linear to ulaw. */ |
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818 sample = sample + BIAS; |
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819 exponent = exp_lut[( sample >> 7 ) & 0xFF]; |
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820 mantissa = (sample >> (exponent + 3)) & 0x0F; |
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821 ulawbyte = ~(sign | (exponent << 4) | mantissa); |
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822 |
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823 return(ulawbyte); |
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824 } /* Slinear2ulaw */ |
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825 |
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826 |
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827 /* this is derived from the Sun code - it is a bit simpler and has int input */ |
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828 #define QUANT_MASK (0xf) /* Quantization field mask. */ |
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829 #define NSEGS (8) /* Number of A-law segments. */ |
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830 #define SEG_SHIFT (4) /* Left shift for segment number. */ |
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831 |
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832 |
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833 static Uint8 Slinear2alaw(Sint32 linear) |
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834 { |
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835 int seg; |
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836 Uint8 aval, mask; |
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837 static const Sint32 seg_aend[NSEGS] = |
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838 { |
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839 0x1f,0x3f,0x7f,0xff,0x1ff,0x3ff,0x7ff,0xfff |
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840 }; |
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841 |
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842 linear >>= 3; |
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843 if(linear >= 0) |
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844 mask = 0xd5; /* sign (7th) bit = 1 */ |
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845 else |
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846 { |
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847 mask = 0x55; /* sign bit = 0 */ |
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848 linear = -linear - 1; |
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849 } /* else */ |
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850 |
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851 /* Convert the scaled magnitude to segment number. */ |
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852 for (seg = 0; (seg < NSEGS) && (linear > seg_aend[seg]); seg++); |
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853 |
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854 /* Combine the sign, segment, and quantization bits. */ |
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855 if (seg >= NSEGS) /* out of range, return maximum value. */ |
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856 return((Uint8) (0x7F ^ mask)); |
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857 |
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858 aval = (Uint8) seg << SEG_SHIFT; |
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859 if (seg < 2) |
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860 aval |= (linear >> 1) & QUANT_MASK; |
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861 else |
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862 aval |= (linear >> seg) & QUANT_MASK; |
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863 |
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864 return (aval ^ mask); |
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865 } /* Slinear2alaw */ |
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866 |
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867 |
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868 /* convert from signed ints to a given type and write */ |
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869 static Uint32 put_to_buffers(Sound_Sample *sample, Uint32 bw) |
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870 { |
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871 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; |
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872 shn_t *shn = (shn_t *) internal->decoder_private; |
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873 int i, 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
|
874 Sint32 *data0 = shn->buffer[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
|
875 Sint32 nitem = shn->blocksize; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
876 int datasize = ((sample->actual.format & 0xFF) / 8); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
877 Uint32 bsiz = shn->nchan * nitem * datasize; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
878 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
879 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
|
880 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
881 if (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
|
882 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
883 void *rc = realloc(shn->backBuffer, 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
|
884 if (rc == NULL) |
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 { |
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 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
|
887 BAIL_MACRO(ERR_OUT_OF_MEMORY, 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
|
888 } /* 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
|
889 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
|
890 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
|
891 } /* 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
|
892 |
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 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
|
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 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
|
896 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
|
897 { |
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 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
|
899 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
|
900 { |
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 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
|
902 *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
|
903 } /* 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
|
904 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
|
905 { |
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 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
|
907 { |
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 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
|
909 *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
|
910 } /* 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
|
911 } /* 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
|
912 } /* 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
|
913 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
|
914 |
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 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
|
916 { |
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 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
|
918 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
|
919 { |
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 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
|
921 *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
|
922 } /* 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
|
923 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
|
924 { |
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 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
|
926 { |
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 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
|
928 *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
|
929 } /* 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
|
930 } /* 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
|
931 } /* 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
|
932 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
|
933 |
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 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
|
935 { |
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 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
|
937 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
|
938 { |
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 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
|
940 *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
|
941 } /* 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
|
942 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
|
943 { |
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 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
|
945 { |
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 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
|
947 *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
|
948 } /* 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
|
949 } /* 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
|
950 } /* 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
|
951 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
|
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 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
|
954 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
|
955 { |
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 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
|
957 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
|
958 { |
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 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
|
960 *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
|
961 } /* 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
|
962 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
|
963 { |
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 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
|
965 { |
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 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
|
967 *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
|
968 } /* 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
|
969 } /* 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
|
970 } /* 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
|
971 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
|
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 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
|
974 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
|
975 { |
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 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
|
977 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
|
978 { |
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 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
|
980 *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
|
981 } /* 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
|
982 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
|
983 { |
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 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
|
985 { |
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 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
|
987 *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
|
988 } /* 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
|
989 } /* 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
|
990 } /* 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
|
991 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
|
992 |
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 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
|
994 { |
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 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
|
996 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
|
997 { |
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 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
|
999 *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
|
1000 } /* 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
|
1001 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
|
1002 { |
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 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
|
1004 { |
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 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
|
1006 *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
|
1007 } /* 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
|
1008 } /* 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
|
1009 } /* 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
|
1010 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
|
1011 |
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 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
|
1013 { |
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 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
|
1015 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
|
1016 { |
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 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
|
1018 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
|
1019 *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
|
1020 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
|
1021 *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
|
1022 } /* 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
|
1023 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
|
1024 { |
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 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
|
1026 { |
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 (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
|
1028 { |
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 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
|
1030 *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
|
1031 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
|
1032 *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
|
1033 } /* 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
|
1034 } /* 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
|
1035 } /* 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
|
1036 } /* 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
|
1037 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
|
1038 |
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 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
|
1040 { |
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 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
|
1042 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
|
1043 { |
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 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
|
1045 *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
|
1046 } /* 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
|
1047 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
|
1048 { |
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 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
|
1050 { |
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 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
|
1052 *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
|
1053 } /* 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
|
1054 }/* 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
|
1055 } /* 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
|
1056 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
|
1057 } /* 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
|
1058 |
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 i = MIN_MACRO(internal->buffer_size - bw, bsiz); |
126 | 1060 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
|
1061 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
|
1062 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
|
1063 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
|
1064 } /* 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
|
1065 |
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 |
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 #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
|
1068 |
86 | 1069 static Uint32 SHN_read(Sound_Sample *sample) |
1070 { | |
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
|
1071 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
|
1072 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
|
1073 Uint32 cpyBytes = 0; |
86 | 1074 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
|
1075 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
|
1076 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
|
1077 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
|
1078 |
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 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
|
1080 |
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 /* 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
|
1082 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
|
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 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
|
1085 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
|
1086 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
|
1087 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
|
1088 } /* 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
|
1089 |
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 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
|
1091 |
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 /* 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
|
1093 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
|
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 (!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
|
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_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
|
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 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
|
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 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
|
1104 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
|
1105 } /* 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
|
1106 |
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 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
|
1108 { |
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 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
|
1110 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
|
1111 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
|
1112 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
|
1113 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
|
1114 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
|
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 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
|
1117 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
|
1118 Sint32 resn = 0, nlpc, j; |
86 | 1119 |
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
|
1120 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
|
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 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
|
1123 { |
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 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
|
1125 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
|
1126 } /* 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
|
1127 |
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 /* 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
|
1129 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
|
1130 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
|
1131 } /* 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
|
1132 |
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 /* 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
|
1134 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
|
1135 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
|
1136 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
|
1137 { |
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 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
|
1139 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
|
1140 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
|
1141 |
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 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
|
1143 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
|
1144 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
|
1145 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
|
1146 } /* else */ |
86 | 1147 |
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
|
1148 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
|
1149 { |
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 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
|
1151 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
|
1152 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
|
1153 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
|
1154 |
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 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
|
1156 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
|
1157 { |
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 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
|
1159 { |
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 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
|
1161 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
|
1162 } /* 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
|
1163 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
|
1164 } /* 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
|
1165 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
|
1166 |
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 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
|
1168 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
|
1169 { |
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 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
|
1171 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1172 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
|
1173 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
|
1174 } /* 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
|
1175 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
|
1176 } /* 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
|
1177 break; |
86 | 1178 |
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
|
1179 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
|
1180 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
|
1181 { |
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 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
|
1183 { |
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 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
|
1185 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
|
1186 } /* 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
|
1187 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
|
1188 } /* 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
|
1189 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
|
1190 |
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 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
|
1192 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
|
1193 { |
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 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
|
1195 { |
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 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
|
1197 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
|
1198 } /* 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
|
1199 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
|
1200 } /* 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
|
1201 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
|
1202 |
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 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
|
1204 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
|
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 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
|
1207 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
|
1208 } /* 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
|
1209 |
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 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
|
1211 { |
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 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
|
1213 { |
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 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
|
1215 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
|
1216 } /* 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
|
1217 } /* 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
|
1218 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1219 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
|
1220 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
|
1221 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1222 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
|
1223 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1224 Sint32 sum = shn->lpcqoffset; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1225 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1226 for(j = 0; j < nlpc; j++) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1227 sum += shn->qlpc[j] * cbuffer[i - j - 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
|
1228 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1229 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
|
1230 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1231 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
|
1232 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
|
1233 } /* 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
|
1234 cbuffer[i] += (sum >> SHN_LPCQUANT); |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1235 } /* for */ |
86 | 1236 |
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
|
1237 if (coffset != 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
|
1238 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1239 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
|
1240 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
|
1241 } /* 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
|
1242 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1243 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
|
1244 } /* 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
|
1245 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1246 /* store mean value if appropriate : N.B. Duplicated code */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1247 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
|
1248 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1249 Sint32 sum = (shn->version < 2) ? 0 : shn->blocksize / 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
|
1250 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
|
1251 sum += 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
|
1252 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1253 for(i = 1; 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
|
1254 shn->offset[chan][i - 1] = 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
|
1255 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1256 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
|
1257 shn->offset[chan][shn->nmean - 1] = sum / shn->blocksize; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1258 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
|
1259 shn->offset[chan][shn->nmean - 1] = (sum / shn->blocksize) << 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
|
1260 } /* 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
|
1261 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1262 /* do the wrap */ |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1263 for(i = -shn->nwrap; i < 0; 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
|
1264 cbuffer[i] = cbuffer[i + shn->blocksize]; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1265 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1266 fix_bitshift(cbuffer, shn->blocksize, shn->bitshift, shn->datatype); |
86 | 1267 |
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
|
1268 if (chan == 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
|
1269 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1270 retval += put_to_buffers(sample, 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
|
1271 if (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
|
1272 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
|
1273 } /* 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
|
1274 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1275 chan = (chan + 1) % shn->nchan; |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1276 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
|
1277 } /* case */ |
86 | 1278 |
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
|
1279 case SHN_FN_BLOCKSIZE: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1280 if (!uint_get((int) (log((double) shn->blocksize) / M_LN2), |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1281 shn, rw, &shn->blocksize)) |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1282 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1283 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
|
1284 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
|
1285 } /* 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
|
1286 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
|
1287 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1288 case SHN_FN_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
|
1289 if (!uvar_get(SHN_BITSHIFTSIZE, shn, rw, &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
|
1290 { |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1291 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
|
1292 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
|
1293 } /* 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
|
1294 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
|
1295 |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1296 case SHN_FN_VERBATIM: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1297 default: |
c08794028df4
Fully implemented. Needs testing, but it works on the Grateful Dead show I
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
1298 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
387
fb519e6028e3
Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
Ryan C. Gordon <icculus@icculus.org>
parents:
377
diff
changeset
|
1299 BAIL_MACRO("SHN: Unhandled function.", retval); |
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
|
1300 } /* 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
|
1301 } /* while */ |
86 | 1302 |
1303 return(retval); | |
1304 } /* SHN_read */ | |
1305 | |
221
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
212
diff
changeset
|
1306 |
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
212
diff
changeset
|
1307 static int SHN_rewind(Sound_Sample *sample) |
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
212
diff
changeset
|
1308 { |
233
15a3b1a1291c
Kludged implementation of the rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents:
221
diff
changeset
|
1309 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; |
15a3b1a1291c
Kludged implementation of the rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents:
221
diff
changeset
|
1310 shn_t *shn = (shn_t *) internal->decoder_private; |
15a3b1a1291c
Kludged implementation of the rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents:
221
diff
changeset
|
1311 |
15a3b1a1291c
Kludged implementation of the rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents:
221
diff
changeset
|
1312 #if 0 |
15a3b1a1291c
Kludged implementation of the rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents:
221
diff
changeset
|
1313 int rc = SDL_RWseek(internal->rw, shn->start_pos, SEEK_SET); |
15a3b1a1291c
Kludged implementation of the rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents:
221
diff
changeset
|
1314 BAIL_IF_MACRO(rc != shn->start_pos, ERR_IO_ERROR, 0); |
15a3b1a1291c
Kludged implementation of the rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents:
221
diff
changeset
|
1315 /* !!! FIXME: set state. */ |
15a3b1a1291c
Kludged implementation of the rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents:
221
diff
changeset
|
1316 return(1); |
15a3b1a1291c
Kludged implementation of the rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents:
221
diff
changeset
|
1317 #else |
15a3b1a1291c
Kludged implementation of the rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents:
221
diff
changeset
|
1318 /* |
15a3b1a1291c
Kludged implementation of the rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents:
221
diff
changeset
|
1319 * !!! FIXME: This is really unacceptable; state should be reset and |
15a3b1a1291c
Kludged implementation of the rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents:
221
diff
changeset
|
1320 * !!! FIXME: the RWops should be pointed to the start of the data |
15a3b1a1291c
Kludged implementation of the rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents:
221
diff
changeset
|
1321 * !!! FIXME: to decode. The below kludge adds unneeded overhead and |
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Kludged implementation of the rewind method.
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1322 * !!! FIXME: risk of failure. |
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1323 */ |
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1324 BAIL_IF_MACRO(SDL_RWseek(internal->rw, 0, SEEK_SET) != 0, ERR_IO_ERROR, 0); |
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1325 SHN_close(sample); |
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1326 return(SHN_open(sample, "SHN")); |
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1327 #endif |
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1328 } /* SHN_rewind */ |
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1329 |
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1330 |
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1331 static int SHN_seek(Sound_Sample *sample, Uint32 ms) |
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1332 { |
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1333 /* |
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1334 * (This CAN be done for SHNs that have a seek table at the end of the |
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1335 * stream, btw.) |
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1336 */ |
351 | 1337 BAIL_MACRO("SHN: Seeking not implemented", 0); |
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1338 } /* SHN_seek */ |
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1339 |
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1340 |
86 | 1341 #endif /* defined SOUND_SUPPORTS_SHN */ |
1342 | |
1343 /* end of shn.c ... */ | |
1344 |