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428
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1 /* miscplay.c - general routines related to playing sounds
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2 **
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3 ** Copyright (C) 1995,96 by Markus Gutschke (gutschk@math.uni-muenster.de)
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4 ** This was sawed out from version 1.3 of linuxplay.c by
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5 ** Robert Bihlmeyer <robbe@orcus.priv.at>.
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6 **
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7 ** Parts of this code were inspired by sunplay.c, which is copyright 1989 by
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8 ** Jef Poskanzer and 1991,92 by Jamie Zawinski; c.f. sunplay.c for further
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9 ** information.
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10 **
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11 ** Permission to use, copy, modify, and distribute this software and its
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12 ** documentation for any purpose and without fee is hereby granted, provided
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13 ** that the above copyright notice appear in all copies and that both that
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14 ** copyright notice and this permission notice appear in supporting
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15 ** documentation. This software is provided "as is" without express or
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16 ** implied warranty.
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17 */
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18
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19 #ifdef HAVE_CONFIG_H
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20 #include <config.h>
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21 #endif
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22
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23 #include "miscplay.h"
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24 #include "lisp.h"
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25 #include "syssignal.h"
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26 #include "sysfile.h"
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27 #define warn(str) message("audio: %s ",GETTEXT(str))
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28
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29 #include <stdlib.h>
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30
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31 #ifdef __GNUC__
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32 #define UNUSED(x) ((void)(x))
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33 #else
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34 #define UNUSED(x)
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35 #endif
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36
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37 /* Maintain global variable for keeping parser state information; this struct
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38 is set to zero before the first invocation of the parser. The use of a
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39 global variable prevents multiple concurrent executions of this code, but
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40 this does not happen anyways... */
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41 enum wvState
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42 { wvMain,
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43 wvSubchunk,
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44 wvOutOfBlock,
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45 wvSkipChunk,
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46 wvSoundChunk,
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47 wvFatal,
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48 wvFatalNotify
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49 };
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50
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51 static union {
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52 struct {
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53 int align;
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54 enum wvState state;
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55 size_t left;
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56 unsigned char leftover[HEADERSZ];
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57 signed long chunklength;
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58 } wave;
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59 struct {
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60 int align;
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61 int isdata;
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62 int skipping;
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63 size_t left;
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64 unsigned char leftover[HEADERSZ];
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65 } audio;
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66 } parsestate;
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67
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68 /* Use a global buffer as scratch-pad for possible conversions of the
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69 sampling format */
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70 unsigned char miscplay_sndbuf[SNDBUFSZ];
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71
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72 /* Initialize global parser state information to zero */
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73 void reset_parsestate()
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74 {
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75 memset(&parsestate,0,sizeof(parsestate));
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76 }
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77
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78 /* Verify that we could fully parse the entire soundfile; this is needed
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79 only for files in WAVE format */
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80 int parse_wave_complete()
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81 {
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82 if (parsestate.wave.state != wvOutOfBlock &&
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83 parsestate.wave.state != wvFatal) {
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84 warn("Unexpected end of WAVE file");
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85 return 0;
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86 } else
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87 return 1;
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88 }
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89
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90 /* There is no special treatment required for parsing raw data files; we
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91 assume that these files contain data in 8bit unsigned format that
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92 has been sampled at 8kHz; there is no extra header */
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93 static size_t parseraw(void **data,size_t *sz,void **outbuf)
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94 {
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95 int rc = *sz;
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96
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97 *outbuf = *data;
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98 *sz = 0;
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99 return(rc);
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100 }
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101
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102 /* Currently we cannot cope with files in VOC format; if you really need
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103 to play these files, they should be converted by using SOX */
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104 static size_t parsevoc(void **data,size_t *sz,void **outbuf)
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105 {
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106 UNUSED(data);
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107 UNUSED(sz);
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108 UNUSED(outbuf);
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109 return(0);
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110 }
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111
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112 /* We need to perform some look-ahead in order to parse files in WAVE format;
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113 this might require re-partioning of the data segments if headers cross the
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114 boundaries between two read operations. This is done in a two-step way:
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115 first we request a certain amount of bytes... */
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442
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116 static inline int waverequire(void **data,size_t *sz,size_t rq)
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428
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117 {
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118 int rc = 1;
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119
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120 if (rq > HEADERSZ) {
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121 warn("Header size exceeded while parsing WAVE file");
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122 parsestate.wave.state = wvFatal;
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123 *sz = 0;
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124 return(0); }
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125 if ((rq -= parsestate.wave.left) <= 0)
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126 return(rc);
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127 if (rq > *sz) {rq = *sz; rc = 0;}
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128 memcpy(parsestate.wave.leftover+parsestate.wave.left,
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129 *data,rq);
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130 parsestate.wave.left += rq;
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131 (*(unsigned char **)data) += rq;
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132 *sz -= rq;
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133 return(rc);
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134 }
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135
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136 /* ...and next we remove this many bytes from the buffer */
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442
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137 static inline void waveremove(size_t rq)
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428
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138 {
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139 if (parsestate.wave.left <= rq)
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140 parsestate.wave.left = 0;
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141 else {
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142 parsestate.wave.left -= rq;
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143 memmove(parsestate.wave.leftover,
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144 parsestate.wave.leftover+rq,
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145 parsestate.wave.left); }
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146 return;
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147 }
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148
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149 /* Sound files in WAVE format can contain an arbitrary amount of tagged
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150 chunks; this requires quite some effort for parsing the data */
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151 static size_t parsewave(void **data,size_t *sz,void **outbuf)
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152 {
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153 for (;;)
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154 switch (parsestate.wave.state) {
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155 case wvMain:
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156 if (!waverequire(data,sz,20))
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157 return(0);
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158 /* Keep compatibility with Linux 68k, etc. by not relying on byte-sex */
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159 parsestate.wave.chunklength = parsestate.wave.leftover[16] +
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160 256*(parsestate.wave.leftover[17] +
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161 256*(parsestate.wave.leftover[18] +
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162 256*parsestate.wave.leftover[19]));
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163 waveremove(20);
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164 parsestate.wave.state = wvSubchunk;
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165 break;
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166 case wvSubchunk:
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167 if (!waverequire(data,sz,parsestate.wave.chunklength))
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168 return(0);
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169 parsestate.wave.align = parsestate.wave.chunklength < 14 ? 1
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170 : parsestate.wave.leftover[12];
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171 if (parsestate.wave.align != 1 &&
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172 parsestate.wave.align != 2 &&
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173 parsestate.wave.align != 4) {
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174 warn("Illegal datawidth detected while parsing WAVE file");
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175 parsestate.wave.state = wvFatal; }
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176 else
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177 parsestate.wave.state = wvOutOfBlock;
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178 waveremove(parsestate.wave.chunklength);
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179 break;
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180 case wvOutOfBlock:
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181 if (!waverequire(data,sz,8))
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182 return(0);
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183 /* Keep compatibility with Linux 68k, etc. by not relying on byte-sex */
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184 parsestate.wave.chunklength = parsestate.wave.leftover[4] +
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185 256*(parsestate.wave.leftover[5] +
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186 256*(parsestate.wave.leftover[6] +
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187 256*(parsestate.wave.leftover[7] & 0x7F)));
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188 if (memcmp(parsestate.wave.leftover,"data",4))
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189 parsestate.wave.state = wvSkipChunk;
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190 else
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191 parsestate.wave.state = wvSoundChunk;
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192 waveremove(8);
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193 break;
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194 case wvSkipChunk:
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195 if (parsestate.wave.chunklength > 0 && *sz > 0 &&
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196 (signed long)*sz < (signed long)parsestate.wave.chunklength) {
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197 parsestate.wave.chunklength -= *sz;
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198 *sz = 0; }
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199 else {
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200 if (parsestate.wave.chunklength > 0 && *sz > 0) {
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201 *sz -= parsestate.wave.chunklength;
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202 (*(unsigned char **)data) += parsestate.wave.chunklength; }
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203 parsestate.wave.state = wvOutOfBlock; }
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204 break;
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205 case wvSoundChunk: {
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206 size_t count,rq;
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207 if (parsestate.wave.left) { /* handle leftover bytes from last
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208 alignment operation */
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209 count = parsestate.wave.left;
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210 rq = HEADERSZ-count;
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211 if (rq > (size_t) parsestate.wave.chunklength)
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212 rq = parsestate.wave.chunklength;
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213 if (!waverequire(data,sz,rq)) {
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214 parsestate.wave.chunklength -= parsestate.wave.left - count;
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215 return(0); }
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216 parsestate.wave.chunklength -= rq;
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217 *outbuf = parsestate.wave.leftover;
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218 parsestate.wave.left = 0;
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219 return(rq); }
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220 if (*sz >= (size_t) parsestate.wave.chunklength) {
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221 count = parsestate.wave.chunklength;
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222 rq = 0; }
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223 else {
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224 count = *sz;
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225 count -= rq = count % parsestate.wave.align; }
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226 *outbuf = *data;
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227 (*(unsigned char **)data) += count;
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228 *sz -= count;
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229 if ((parsestate.wave.chunklength -= count) < parsestate.wave.align) {
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230 parsestate.wave.state = wvOutOfBlock;
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231 /* Some broken software (e.g. SOX) attaches junk to the end of a sound
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232 chunk; so, let's ignore this... */
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233 if (parsestate.wave.chunklength)
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234 parsestate.wave.state = wvSkipChunk; }
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235 else if (rq)
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236 /* align data length to a multiple of datasize; keep additional data
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237 in "leftover" buffer --- this is necessary to ensure proper
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238 functioning of the sndcnv... routines */
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239 waverequire(data,sz,rq);
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240 return(count); }
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241 case wvFatalNotify:
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242 warn("Irrecoverable error while parsing WAVE file");
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243 parsestate.wave.state = wvFatal;
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244 break;
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245 case wvFatal:
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246 default:
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247 *sz = 0;
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248 return(0); }
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249 }
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250
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251 /* Strip the header from files in Sun/DEC audio format; this requires some
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252 extra processing as the header can be an arbitrary size and it might
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253 result in alignment errors for subsequent conversions --- thus we do
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254 some buffering, where needed */
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255 static size_t parsesundecaudio(void **data,size_t *sz,void **outbuf)
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256 {
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257 /* There is data left over from the last invocation of this function; join
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258 it with the new data and return a sound chunk that is as big as a
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259 single entry */
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260 if (parsestate.audio.left) {
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261 if (parsestate.audio.left + *sz > (size_t) parsestate.audio.align) {
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262 int count;
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263 memmove(parsestate.audio.leftover + parsestate.audio.left,
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264 *data,
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265 count = parsestate.audio.align - parsestate.audio.left);
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266 *outbuf = parsestate.audio.leftover;
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267 *sz -= count;
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268 *data = (*(char **)data) + count;
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269 parsestate.audio.left = 0;
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270 return(parsestate.audio.align); }
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271 else {
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272 /* We need even more data in order to get one complete single entry! */
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273 memmove(parsestate.audio.leftover + parsestate.audio.left,
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274 *data,
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275 *sz);
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276 *data = (*(char **)data) + *sz;
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277 parsestate.audio.left += *sz;
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278 *sz = 0;
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279 return(0); } }
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280
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281 /* This is the main sound chunk, strip of any extra data that does not fit
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282 the alignment requirements and move these bytes into the leftover buffer*/
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283 if (parsestate.audio.isdata) {
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284 int rc = *sz;
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285 *outbuf = *data;
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286 if ((parsestate.audio.left = rc % parsestate.audio.align) != 0) {
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287 memmove(parsestate.audio.leftover,
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288 (char *)*outbuf + rc - parsestate.audio.left,
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289 parsestate.audio.left);
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290 rc -= parsestate.audio.left; }
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291 *sz = 0;
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292 return(rc); }
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293
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294 /* This is the first invocation of this function; we need to parse the
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295 header information and determine how many bytes we need to skip until
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296 the start of the sound chunk */
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297 if (!parsestate.audio.skipping) {
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298 unsigned char *header = (unsigned char *) *data;
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299 if (*sz < 8) {
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300 warn("Irrecoverable error while parsing Sun/DEC audio file");
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301 return(0); }
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302 /* Keep compatibility with Linux 68k, etc. by not relying on byte-sex */
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303 if (header[3]) { /* Sun audio (big endian) */
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304 parsestate.audio.align = ((header[15] > 2)+1)*header[23];
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305 parsestate.audio.skipping = header[7]+256*(header[6]+256*
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306 (header[5]+256*header[4])); }
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307 else { /* DEC audio (little endian) */
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308 parsestate.audio.align = ((header[12] > 2)+1)*header[20];
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309 parsestate.audio.skipping = header[4]+256*(header[5]+256*
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310 (header[6]+256*header[7])); }}
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311
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312 /* We are skipping extra data that has been attached to header; most usually
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313 this will be just a comment, such as the original filename and/or the
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314 creation date. Make sure that we do not return less than one single sound
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315 sample entry to the caller; if this happens, rather decide to move those
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316 few bytes into the leftover buffer and deal with it later */
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317 if (*sz >= (size_t) parsestate.audio.skipping) {
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318 /* Skip just the header information and return the sound chunk */
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319 int rc = *sz - parsestate.audio.skipping;
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320 *outbuf = (char *)*data + parsestate.audio.skipping;
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321 if ((parsestate.audio.left = rc % parsestate.audio.align) != 0) {
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322 memmove(parsestate.audio.leftover,
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323 (char *)*outbuf + rc - parsestate.audio.left,
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324 parsestate.audio.left);
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325 rc -= parsestate.audio.left; }
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326 *sz = 0;
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327 parsestate.audio.skipping = 0;
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328 parsestate.audio.isdata++;
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329 return(rc); }
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330 else {
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331 /* Skip everything */
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332 parsestate.audio.skipping -= *sz;
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333 return(0); }
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334 }
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335
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336 /* If the soundcard could not be set to natively support the data format, we
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337 try to do some limited on-the-fly conversion to a different format; if
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338 no conversion is needed, though, we can output directly */
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339 size_t sndcnvnop(void **data,size_t *sz,void **outbuf)
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340 {
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341 int rc = *sz;
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342
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343 *outbuf = *data;
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344 *sz = 0;
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345 return(rc);
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346 }
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347
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348 /* Convert 8 bit unsigned stereo data to 8 bit unsigned mono data */
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349 size_t sndcnv8U_2mono(void **data,size_t *sz,void **outbuf)
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350 {
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351 REGISTER unsigned char *src;
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352 REGISTER unsigned char *dest;
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353 int rc,count;
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354
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355 count = *sz / 2;
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356 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
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357 else *sz = 0;
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358 rc = count;
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359 src = (unsigned char *) *data;
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360 *outbuf =
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361 dest = miscplay_sndbuf;
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362 while (count--)
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452
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363 {
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364 *dest++ = (unsigned char)(((int)*(src) +
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365 (int)*(src+1)) / 2);
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366 src += 2;
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367 }
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428
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368 *data = src;
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369 return(rc);
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370 }
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371
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372 /* Convert 8 bit signed stereo data to 8 bit signed mono data */
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373 size_t sndcnv8S_2mono(void **data,size_t *sz,void **outbuf)
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374 {
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375 REGISTER unsigned char *src;
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376 REGISTER unsigned char *dest;
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377 int rc, count;
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378
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379 count = *sz / 2;
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380 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
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381 else *sz = 0;
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382 rc = count;
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383 src = (unsigned char *) *data;
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384 *outbuf =
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385 dest = miscplay_sndbuf;
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386 while (count--)
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444
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387 {
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|
|
388 *dest++ = (unsigned char)(((int)*((signed char *)(src)) +
|
|
|
389 (int)*((signed char *)(src+1))) / 2);
|
|
|
390 src += 2;
|
|
|
391 }
|
|
428
|
392 *data = src;
|
|
|
393 return(rc);
|
|
|
394 }
|
|
|
395
|
|
|
396 /* Convert 8 bit signed stereo data to 8 bit unsigned mono data */
|
|
|
397 size_t sndcnv2monounsigned(void **data,size_t *sz,void **outbuf)
|
|
|
398 {
|
|
|
399 REGISTER unsigned char *src;
|
|
|
400 REGISTER unsigned char *dest;
|
|
|
401 int rc,count;
|
|
|
402
|
|
|
403 count = *sz / 2;
|
|
|
404 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
405 else *sz = 0;
|
|
|
406 rc = count;
|
|
|
407 src = (unsigned char *) *data;
|
|
|
408 *outbuf =
|
|
|
409 dest = miscplay_sndbuf;
|
|
|
410 while (count--)
|
|
444
|
411 {
|
|
|
412 *dest++ = (unsigned char)(((int)*((signed char *)(src)) +
|
|
|
413 (int)*((signed char *)(src+1))) / 2) ^ 0x80;
|
|
|
414 src += 2;
|
|
|
415 }
|
|
428
|
416 *data = src;
|
|
|
417 return(rc);
|
|
|
418 }
|
|
|
419
|
|
|
420 /* Convert 8 bit signed mono data to 8 bit unsigned mono data */
|
|
|
421 size_t sndcnv2unsigned(void **data,size_t *sz,void **outbuf)
|
|
|
422 {
|
|
|
423 REGISTER unsigned char *src;
|
|
|
424 REGISTER unsigned char *dest;
|
|
|
425 int rc,count;
|
|
|
426
|
|
|
427 count = *sz;
|
|
|
428 if (count > SNDBUFSZ) { *sz -= SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
429 else *sz = 0;
|
|
|
430 rc = count;
|
|
|
431 src = (unsigned char *) *data;
|
|
|
432 *outbuf =
|
|
|
433 dest = miscplay_sndbuf;
|
|
|
434 while (count--)
|
|
|
435 *dest++ = *(src)++ ^ 0x80;
|
|
|
436 *data = src;
|
|
|
437 return(rc);
|
|
|
438 }
|
|
|
439
|
|
|
440 /* Convert a number in the range -32768..32767 to an 8 bit ulaw encoded
|
|
|
441 number --- I hope, I got this conversion right :-) */
|
|
442
|
442 static inline signed char int2ulaw(int i)
|
|
428
|
443 {
|
|
|
444 /* Lookup table for fast calculation of number of bits that need shifting*/
|
|
|
445 static short int t_bits[128] = {
|
|
|
446 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
|
|
|
447 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
|
|
|
448 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
|
|
|
449 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7};
|
|
|
450 REGISTER int bits,logi;
|
|
|
451
|
|
|
452 /* unrolling this condition (hopefully) improves execution speed */
|
|
|
453 if (i < 0) {
|
|
|
454 if ((i = (132-i)) > 0x7FFF) i = 0x7FFF;
|
|
|
455 logi = (i >> ((bits = t_bits[i/256])+4));
|
|
|
456 return((bits << 4 | logi) ^ 0x7F); }
|
|
|
457 else {
|
|
|
458 if ((i = 132+i) > 0x7FFF) i = 0x7FFF;
|
|
|
459 logi = (i >> ((bits = t_bits[i/256])+4));
|
|
|
460 return(~(bits << 4 | logi)); }
|
|
|
461 }
|
|
|
462
|
|
|
463 /* Convert from 8 bit ulaw mono to 8 bit linear mono */
|
|
|
464 size_t sndcnvULaw_2linear(void **data,size_t *sz,void **outbuf)
|
|
|
465 {
|
|
|
466 /* conversion table stolen from Linux's ulaw.h */
|
|
|
467 static unsigned char ulaw_dsp[] = {
|
|
|
468 3, 7, 11, 15, 19, 23, 27, 31,
|
|
|
469 35, 39, 43, 47, 51, 55, 59, 63,
|
|
|
470 66, 68, 70, 72, 74, 76, 78, 80,
|
|
|
471 82, 84, 86, 88, 90, 92, 94, 96,
|
|
|
472 98, 99, 100, 101, 102, 103, 104, 105,
|
|
|
473 106, 107, 108, 109, 110, 111, 112, 113,
|
|
|
474 113, 114, 114, 115, 115, 116, 116, 117,
|
|
|
475 117, 118, 118, 119, 119, 120, 120, 121,
|
|
|
476 121, 121, 122, 122, 122, 122, 123, 123,
|
|
|
477 123, 123, 124, 124, 124, 124, 125, 125,
|
|
|
478 125, 125, 125, 125, 126, 126, 126, 126,
|
|
|
479 126, 126, 126, 126, 127, 127, 127, 127,
|
|
|
480 127, 127, 127, 127, 127, 127, 127, 127,
|
|
|
481 128, 128, 128, 128, 128, 128, 128, 128,
|
|
|
482 128, 128, 128, 128, 128, 128, 128, 128,
|
|
|
483 128, 128, 128, 128, 128, 128, 128, 128,
|
|
|
484 253, 249, 245, 241, 237, 233, 229, 225,
|
|
|
485 221, 217, 213, 209, 205, 201, 197, 193,
|
|
|
486 190, 188, 186, 184, 182, 180, 178, 176,
|
|
|
487 174, 172, 170, 168, 166, 164, 162, 160,
|
|
|
488 158, 157, 156, 155, 154, 153, 152, 151,
|
|
|
489 150, 149, 148, 147, 146, 145, 144, 143,
|
|
|
490 143, 142, 142, 141, 141, 140, 140, 139,
|
|
|
491 139, 138, 138, 137, 137, 136, 136, 135,
|
|
|
492 135, 135, 134, 134, 134, 134, 133, 133,
|
|
|
493 133, 133, 132, 132, 132, 132, 131, 131,
|
|
|
494 131, 131, 131, 131, 130, 130, 130, 130,
|
|
|
495 130, 130, 130, 130, 129, 129, 129, 129,
|
|
|
496 129, 129, 129, 129, 129, 129, 129, 129,
|
|
|
497 128, 128, 128, 128, 128, 128, 128, 128,
|
|
|
498 128, 128, 128, 128, 128, 128, 128, 128,
|
|
|
499 128, 128, 128, 128, 128, 128, 128, 128,
|
|
|
500 };
|
|
|
501 unsigned char *p=(unsigned char *)*data;
|
|
|
502
|
|
|
503 *outbuf = *data;
|
|
|
504 while ((*sz)--)
|
|
444
|
505 {
|
|
|
506 *p = ulaw_dsp[*p];
|
|
|
507 p++;
|
|
|
508 }
|
|
428
|
509 *sz = 0;
|
|
|
510 *data = p;
|
|
|
511 return p - (unsigned char *)*outbuf;
|
|
|
512 }
|
|
|
513
|
|
|
514 /* Convert 8 bit ulaw stereo data to 8 bit ulaw mono data */
|
|
|
515 size_t sndcnvULaw_2mono(void **data,size_t *sz,void **outbuf)
|
|
|
516 {
|
|
|
517
|
|
|
518 static short int ulaw2int[256] = {
|
|
|
519 /* Precomputed lookup table for conversion from ulaw to 15 bit signed */
|
|
|
520 -16062,-15550,-15038,-14526,-14014,-13502,-12990,-12478,
|
|
|
521 -11966,-11454,-10942,-10430, -9918, -9406, -8894, -8382,
|
|
|
522 -7998, -7742, -7486, -7230, -6974, -6718, -6462, -6206,
|
|
|
523 -5950, -5694, -5438, -5182, -4926, -4670, -4414, -4158,
|
|
|
524 -3966, -3838, -3710, -3582, -3454, -3326, -3198, -3070,
|
|
|
525 -2942, -2814, -2686, -2558, -2430, -2302, -2174, -2046,
|
|
|
526 -1950, -1886, -1822, -1758, -1694, -1630, -1566, -1502,
|
|
|
527 -1438, -1374, -1310, -1246, -1182, -1118, -1054, -990,
|
|
|
528 -942, -910, -878, -846, -814, -782, -750, -718,
|
|
|
529 -686, -654, -622, -590, -558, -526, -494, -462,
|
|
|
530 -438, -422, -406, -390, -374, -358, -342, -326,
|
|
|
531 -310, -294, -278, -262, -246, -230, -214, -198,
|
|
|
532 -186, -178, -170, -162, -154, -146, -138, -130,
|
|
|
533 -122, -114, -106, -98, -90, -82, -74, -66,
|
|
|
534 -60, -56, -52, -48, -44, -40, -36, -32,
|
|
|
535 -28, -24, -20, -16, -12, -8, -4, +0,
|
|
|
536 +16062,+15550,+15038,+14526,+14014,+13502,+12990,+12478,
|
|
|
537 +11966,+11454,+10942,+10430, +9918, +9406, +8894, +8382,
|
|
|
538 +7998, +7742, +7486, +7230, +6974, +6718, +6462, +6206,
|
|
|
539 +5950, +5694, +5438, +5182, +4926, +4670, +4414, +4158,
|
|
|
540 +3966, +3838, +3710, +3582, +3454, +3326, +3198, +3070,
|
|
|
541 +2942, +2814, +2686, +2558, +2430, +2302, +2174, +2046,
|
|
|
542 +1950, +1886, +1822, +1758, +1694, +1630, +1566, +1502,
|
|
|
543 +1438, +1374, +1310, +1246, +1182, +1118, +1054, +990,
|
|
|
544 +942, +910, +878, +846, +814, +782, +750, +718,
|
|
|
545 +686, +654, +622, +590, +558, +526, +494, +462,
|
|
|
546 +438, +422, +406, +390, +374, +358, +342, +326,
|
|
|
547 +310, +294, +278, +262, +246, +230, +214, +198,
|
|
|
548 +186, +178, +170, +162, +154, +146, +138, +130,
|
|
|
549 +122, +114, +106, +98, +90, +82, +74, +66,
|
|
|
550 +60, +56, +52, +48, +44, +40, +36, +32,
|
|
|
551 +28, +24, +20, +16, +12, +8, +4, +0};
|
|
|
552
|
|
|
553 REGISTER unsigned char *src;
|
|
|
554 REGISTER unsigned char *dest;
|
|
|
555 int rc,count;
|
|
|
556
|
|
|
557 count = *sz / 2;
|
|
|
558 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
559 else *sz = 0;
|
|
|
560 rc = count;
|
|
|
561 src = (unsigned char *) *data;
|
|
|
562 *outbuf =
|
|
|
563 dest = miscplay_sndbuf;
|
|
|
564 while (count--)
|
|
444
|
565 {
|
|
|
566 /* it is not possible to directly interpolate between two ulaw encoded
|
|
|
567 data bytes, thus we need to convert to linear format first and later
|
|
|
568 we convert back to ulaw format */
|
|
|
569 *dest++ = int2ulaw(ulaw2int[*src] +
|
|
|
570 ulaw2int[*(src+1)]);
|
|
|
571 src += 2;
|
|
|
572 }
|
|
428
|
573 *data = src;
|
|
|
574 return(rc);
|
|
|
575 }
|
|
|
576
|
|
|
577 size_t sndcnv16swap(void **data,size_t *sz,void **outbuf)
|
|
|
578 {
|
|
|
579 size_t cnt = *sz / 2;
|
|
|
580 unsigned short *p;
|
|
|
581
|
|
|
582 *outbuf = *data;
|
|
|
583 p = (unsigned short *) *outbuf;
|
|
444
|
584 while (cnt--)
|
|
|
585 {
|
|
|
586 *p = ((*p & 0x00ff) << 8) | (*p >> 8);
|
|
|
587 p++;
|
|
|
588 }
|
|
428
|
589 *data = p;
|
|
|
590 cnt = *sz;
|
|
|
591 *sz = 0;
|
|
|
592 return cnt;
|
|
|
593 }
|
|
|
594
|
|
|
595 /* Convert 16 bit little endian signed stereo data to 16 bit little endian
|
|
|
596 signed mono data */
|
|
|
597 size_t sndcnv16_2monoLE(void **data,size_t *sz,void **outbuf)
|
|
|
598 {
|
|
|
599 REGISTER unsigned char *src;
|
|
|
600 REGISTER unsigned char *dest;
|
|
|
601 int rc,count;
|
|
|
602 signed short i;
|
|
|
603
|
|
|
604 count = *sz / 2;
|
|
|
605 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
606 else *sz = 0;
|
|
|
607 rc = count;
|
|
|
608 src = (unsigned char *) *data;
|
|
|
609 *outbuf =
|
|
|
610 dest = miscplay_sndbuf;
|
|
|
611 for (count /= 2; count--; ) {
|
|
|
612 i = ((int)(src[0]) +
|
|
|
613 256*(int)(src[1]) +
|
|
|
614 (int)(src[2]) +
|
|
|
615 256*(int)(src[3])) / 2;
|
|
|
616 src += 4;
|
|
|
617 *dest++ = (unsigned char)(i & 0xFF);
|
|
|
618 *dest++ = (unsigned char)((i / 256) & 0xFF); }
|
|
|
619 *data = src;
|
|
|
620 return(rc);
|
|
|
621 }
|
|
|
622
|
|
|
623 /* Convert 16 bit big endian signed stereo data to 16 bit big endian
|
|
|
624 signed mono data */
|
|
|
625 size_t sndcnv16_2monoBE(void **data,size_t *sz,void **outbuf)
|
|
|
626 {
|
|
|
627 REGISTER unsigned char *src;
|
|
|
628 REGISTER unsigned char *dest;
|
|
|
629 int rc,count;
|
|
|
630 signed short i;
|
|
|
631
|
|
|
632 count = *sz / 2;
|
|
|
633 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
634 else *sz = 0;
|
|
|
635 rc = count;
|
|
|
636 src = (unsigned char *) *data;
|
|
|
637 *outbuf =
|
|
|
638 dest = miscplay_sndbuf;
|
|
|
639 for (count /= 2; count--; ) {
|
|
|
640 i = ((int)(src[1]) +
|
|
|
641 256*(int)(src[0]) +
|
|
|
642 (int)(src[3]) +
|
|
|
643 256*(int)(src[2])) / 2;
|
|
|
644 src += 4;
|
|
|
645 *dest++ = (unsigned char)((i / 256) & 0xFF);
|
|
|
646 *dest++ = (unsigned char)(i & 0xFF); }
|
|
|
647 *data = src;
|
|
|
648 return(rc);
|
|
|
649 }
|
|
|
650
|
|
|
651 /* Convert 16 bit little endian signed data to 8 bit unsigned data */
|
|
|
652 size_t sndcnv2byteLE(void **data,size_t *sz,void **outbuf)
|
|
|
653 {
|
|
|
654 REGISTER unsigned char *src;
|
|
|
655 REGISTER unsigned char *dest;
|
|
|
656 int rc,count;
|
|
|
657
|
|
|
658 count = *sz / 2;
|
|
|
659 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
660 else *sz = 0;
|
|
|
661 rc = count;
|
|
|
662 src = (unsigned char *) *data;
|
|
|
663 *outbuf =
|
|
|
664 dest = miscplay_sndbuf;
|
|
|
665 while (count--) {
|
|
|
666 *dest++ = (unsigned char)(((signed char *)src)[1] ^ (signed char)0x80);
|
|
|
667 src += 2;
|
|
|
668 }
|
|
|
669 *data = src;
|
|
|
670 return(rc);
|
|
|
671 }
|
|
|
672
|
|
|
673 /* Convert 16 bit big endian signed data to 8 bit unsigned data */
|
|
|
674 size_t sndcnv2byteBE(void **data,size_t *sz,void **outbuf)
|
|
|
675 {
|
|
|
676 REGISTER unsigned char *src;
|
|
|
677 REGISTER unsigned char *dest;
|
|
|
678 int rc,count;
|
|
|
679
|
|
|
680 count = *sz / 2;
|
|
|
681 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
682 else *sz = 0;
|
|
|
683 rc = count;
|
|
|
684 src = (unsigned char *) *data;
|
|
|
685 *outbuf =
|
|
|
686 dest = miscplay_sndbuf;
|
|
|
687 while (count--) {
|
|
|
688 *dest++ = (unsigned char)(((signed char *)src)[0] ^ (signed char)0x80);
|
|
|
689 src += 2;
|
|
|
690 }
|
|
|
691 *data = src;
|
|
|
692 return(rc);
|
|
|
693 }
|
|
|
694
|
|
|
695 /* Convert 16 bit little endian signed stereo data to 8 bit unsigned
|
|
|
696 mono data */
|
|
|
697 size_t sndcnv2monobyteLE(void **data,size_t *sz,void **outbuf)
|
|
|
698 {
|
|
|
699 REGISTER unsigned char *src;
|
|
|
700 REGISTER unsigned char *dest;
|
|
|
701 int rc,count;
|
|
|
702
|
|
|
703 count = *sz / 4;
|
|
|
704 if (count > SNDBUFSZ) { *sz -= 4*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
705 else *sz = 0;
|
|
|
706 rc = count;
|
|
|
707 src = (unsigned char *) *data;
|
|
|
708 *outbuf =
|
|
|
709 dest = miscplay_sndbuf;
|
|
|
710 while (count--) {
|
|
|
711 *dest++ = (unsigned char)(((int)((signed char *)src)[1] +
|
|
|
712 (int)((signed char *)src)[3]) / 2 ^ 0x80);
|
|
|
713 src += 4;
|
|
|
714 }
|
|
|
715 *data = src;
|
|
|
716 return(rc);
|
|
|
717 }
|
|
|
718
|
|
|
719 /* Convert 16 bit big endian signed stereo data to 8 bit unsigned
|
|
|
720 mono data */
|
|
|
721 size_t sndcnv2monobyteBE(void **data,size_t *sz,void **outbuf)
|
|
|
722 {
|
|
|
723 REGISTER unsigned char *src;
|
|
|
724 REGISTER unsigned char *dest;
|
|
|
725 int rc,count;
|
|
|
726
|
|
|
727 count = *sz / 4;
|
|
|
728 if (count > SNDBUFSZ) { *sz -= 4*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
729 else *sz = 0;
|
|
|
730 rc = count;
|
|
|
731 src = (unsigned char *) *data;
|
|
|
732 *outbuf =
|
|
|
733 dest = miscplay_sndbuf;
|
|
|
734 while (count--) {
|
|
|
735 *dest++ = (unsigned char)(((int)((signed char *)src)[0] +
|
|
|
736 (int)((signed char *)src)[2]) / 2 ^ 0x80);
|
|
|
737 src += 4;
|
|
|
738 }
|
|
|
739 *data = src;
|
|
|
740 return(rc);
|
|
|
741 }
|
|
|
742
|
|
|
743 /* Look at the header of the sound file and try to determine the format;
|
|
|
744 we can recognize files in VOC, WAVE, and, Sun/DEC-audio format--- everything
|
|
|
745 else is assumed to be raw 8 bit unsigned data sampled at 8kHz */
|
|
|
746 fmtType analyze_format(unsigned char *format,int *fmt,int *speed,
|
|
|
747 int *tracks,
|
|
|
748 size_t (**parsesndfile)(void **,size_t *sz,
|
|
|
749 void **))
|
|
|
750 {
|
|
|
751 /* Keep compatibility with Linux 68k, etc. by not relying on byte-sex */
|
|
|
752 if (!memcmp(format,"Creative Voice File\x1A\x1A\x00",22) &&
|
|
|
753 (format[22]+256*format[23]) ==
|
|
|
754 ((0x1233-format[24]-256*format[25])&0xFFFF)) { /* VOC */
|
|
|
755 *fmt = AFMT_U8;
|
|
|
756 *speed = 8000;
|
|
|
757 *tracks = 2;
|
|
|
758 *parsesndfile = parsevoc;
|
|
|
759 return(fmtVoc); }
|
|
|
760 else if (!memcmp(format,"RIFF",4) &&
|
|
|
761 !memcmp(format+8,"WAVEfmt ",8)) { /* WAVE */
|
|
|
762 if (memcmp(format+20,"\001\000\001"/* PCM mono */,4) &&
|
|
|
763 memcmp(format+20,"\001\000\002"/* PCM stereo */,4))
|
|
|
764 return(fmtIllegal);
|
|
|
765 *fmt = (format[32]/(*tracks = format[22])) == 1 ?
|
|
|
766 AFMT_U8 : AFMT_S16_LE;
|
|
|
767 /* Keep compatibility with Linux 68k, etc. by not relying on byte-sex */
|
|
|
768 *speed = format[24]+256*(format[25]+256*
|
|
|
769 (format[26]+256*format[27]));
|
|
|
770 *parsesndfile = parsewave;
|
|
|
771 return(fmtWave); }
|
|
|
772 else if (!memcmp(format,".snd",4)) { /* Sun Audio (big endian) */
|
|
|
773 if (format[7]+256*(format[6]+256*(format[5]+256*format[4])) < 24) {
|
|
|
774 *fmt = AFMT_MU_LAW;
|
|
|
775 *speed = 8000;
|
|
|
776 *tracks = 1;
|
|
|
777 *parsesndfile = parsesundecaudio;
|
|
|
778 return(fmtSunAudio); }
|
|
|
779 if (!memcmp(format+12,"\000\000\000\001",4)) *fmt = AFMT_MU_LAW;
|
|
|
780 else if (!memcmp(format+12,"\000\000\000\002",4)) *fmt = AFMT_S8;
|
|
|
781 else if (!memcmp(format+12,"\000\000\000\003",4)) *fmt = AFMT_S16_BE;
|
|
|
782 else return(fmtIllegal);
|
|
|
783 /* Keep compatibility with Linux 68k, etc. by not relying on byte-sex */
|
|
|
784 *speed = format[19]+256*(format[18]+256*
|
|
|
785 (format[17]+256*format[16]));
|
|
|
786 *tracks = format[23];
|
|
|
787 *parsesndfile = parsesundecaudio;
|
|
|
788 return(fmtSunAudio); }
|
|
|
789 else if (!memcmp(format,".sd",4)) { /* DEC Audio (little endian) */
|
|
|
790 if (format[4]+256*(format[5]+256*(format[6]+256*format[7])) < 24) {
|
|
|
791 *fmt = AFMT_MU_LAW;
|
|
|
792 *speed = 8000;
|
|
|
793 *tracks = 1;
|
|
|
794 *parsesndfile = parsesundecaudio;
|
|
|
795 return(fmtSunAudio); }
|
|
|
796 if (!memcmp(format+12,"\001\000\000",4)) *fmt = AFMT_MU_LAW;
|
|
|
797 else if (!memcmp(format+12,"\002\000\000",4)) *fmt = AFMT_S8;
|
|
|
798 else if (!memcmp(format+12,"\003\000\000",4)) *fmt = AFMT_S16_LE;
|
|
|
799 else return(fmtIllegal);
|
|
|
800 /* Keep compatibility with Linux 68k, etc. by not relying on byte-sex */
|
|
|
801 *speed = format[16]+256*(format[17]+256*
|
|
|
802 (format[18]+256*format[19]));
|
|
|
803 *tracks = format[20];
|
|
|
804 *parsesndfile = parsesundecaudio;
|
|
|
805 return(fmtSunAudio); }
|
|
|
806 else {
|
|
|
807 *fmt = AFMT_U8;
|
|
|
808 *speed = 8000;
|
|
|
809 *tracks = 1;
|
|
|
810 *parsesndfile = parseraw;
|
|
|
811 return(fmtRaw); }
|
|
|
812 }
|
