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1 /* linuxplay.c - play a sound file on the speaker
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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 is version 1.3 of linuxplay.c
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5 **
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6 ** Parts of this code were inspired by sunplay.c, which is copyright 1989 by
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7 ** Jef Poskanzer and 1991,92 by Jamie Zawinski; c.f. sunplay.c for further
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8 ** information.
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9 **
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10 ** Permission to use, copy, modify, and distribute this software and its
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11 ** documentation for any purpose and without fee is hereby granted, provided
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12 ** that the above copyright notice appear in all copies and that both that
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13 ** copyright notice and this permission notice appear in supporting
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14 ** documentation. This software is provided "as is" without express or
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15 ** implied warranty.
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16 **
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17 ** Changelog:
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18 ** 1.0 -- first release; supports SunAudio, Wave and RAW file formats
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19 ** detects (and rejects) VOC file format
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20 ** tested with PC-Speaker driver only
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21 ** 1.1 -- fixed bug with playback of stereo Wave files
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22 ** fixed VOC file detection
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23 ** fixed mono/8bit conversion
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24 ** cleaned up mixer programming (c.f. VoxWare-SDK)
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25 ** tested with PC-Speaker driver and with PAS16 soundcard
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26 ** 1.2 -- first (incompatible) attempt at fixing reliable signal handling
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27 ** 1.3 -- changed signal handling to use reliable signals; this is done
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28 ** by including "syssignal.h"; it fixes nasty program crashes
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29 ** when using native sound in TTY mode.
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30 ** added support for DEC audio file format (this is basically the
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31 ** same as Sun audio, but uses little endian format, instead).
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32 ** strip the header from Sun audio and DEC audio files in order to
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33 ** prevent noise at beginning of samples (thanks to Thomas Pundt
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34 ** <pundtt@math.uni-muenster.de> for pointing out this bug and
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35 ** providing information on the file format).
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36 ** added a few more conversion routines.
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37 ** made the code even more tolerant to the limits imposed by some
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38 ** soundcards and try to accept soundfiles even if they are not
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39 ** fully conformant to the standard.
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40 ** 1.4 -- increased header size to 256; I hope there is no sample software
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41 ** that requires this much.
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42 ** added code for converting from signed to unsigned format as
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43 ** some soundcards cannot handle signed 8bit data.
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44 */
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45
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46 /* Synched up with: Not in FSF. */
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47
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48 #define HEADERSZ 256 /* has to be at least as big as the biggest header */
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49 #define SNDBUFSZ 2048 /* has to be at least as big as HEADERSZ */
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50
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51 /* XEmacs beta testers say: undef this by default. */
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52 #undef NOVOLUMECTRLFORMULAW /* Changing the volume for uLaw-encoded
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53 samples sounds very poor; possibly,
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54 this is true only for the PC-Snd
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55 driver, so undefine this symbol at your
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56 discretion */
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57
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58 #ifdef HAVE_CONFIG_H
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59 #include <config.h>
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60 #endif
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61
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62 #include <errno.h>
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63 #include <fcntl.h>
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149
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64 #include SOUNDCARD_H_PATH /* Path computed by configure */
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0
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65 #include <stdio.h>
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66 #include <stdlib.h>
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67 #include <string.h>
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321
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68 #include <fcntl.h>
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0
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69 #include <sys/file.h>
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70 #include <sys/ioctl.h>
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71 #include <sys/signal.h>
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72 #include <unistd.h>
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73
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74 #ifdef LINUXPLAYSTANDALONE
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75 #define perror(str) fprintf(stderr,"audio: %s %s\n",str,strerror(errno));
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76 #define warn(str) fprintf(stderr,"audio: %s\n",str);
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77 #else
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78 #include "lisp.h"
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79 #include "syssignal.h"
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272
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80 #include "sysfile.h"
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0
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81 #define perror(str) message("audio: %s, %s ",str,strerror(errno))
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82 #define warn(str) message("audio: %s ",GETTEXT(str))
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83 #endif
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272
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84
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0
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85 #ifdef __GNUC__
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86 #define UNUSED(x) ((void)(x))
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87 #else
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88 #define UNUSED(x)
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89 #define __inline__
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90 #endif
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91
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98
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92 static void (*sighup_handler)(int);
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93 static void (*sigint_handler)(int);
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0
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94
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95 /* Maintain global variable for keeping parser state information; this struct
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96 is set to zero before the first invocation of the parser. The use of a
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97 global variable prevents multiple concurrent executions of this code, but
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98 this does not happen anyways... */
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272
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99 enum wvState
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100 { wvMain,
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101 wvSubchunk,
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102 wvOutOfBlock,
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103 wvSkipChunk,
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104 wvSoundChunk,
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105 wvFatal,
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106 wvFatalNotify
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107 };
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108
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0
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109 static union {
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110 struct {
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111 int align;
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272
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112 enum wvState state;
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0
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113 size_t left;
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114 unsigned char leftover[HEADERSZ];
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115 signed long chunklength;
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116 } wave;
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117 struct {
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118 int align;
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119 int isdata;
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120 int skipping;
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121 size_t left;
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122 unsigned char leftover[HEADERSZ];
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123 } audio;
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124 } parsestate;
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125
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126 /* Use a global buffer as scratch-pad for possible conversions of the
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127 sampling format */
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124
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128 unsigned char linuxplay_sndbuf[SNDBUFSZ];
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0
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129
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282
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130 static int mix_fd;
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131 static int audio_vol;
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132 static int audio_fd;
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133 static char *audio_dev = "/dev/dsp";
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0
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134
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135 typedef enum {fmtIllegal,fmtRaw,fmtVoc,fmtWave,fmtSunAudio} fmtType;
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136
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137 /* Intercept SIGINT and SIGHUP in order to close the audio and mixer
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138 devices before terminating sound output; this requires reliable
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139 signals as provided by "syssignal.h" */
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140 static void sighandler(int sig)
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141 {
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142 if (mix_fd > 0) {
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143 if (audio_vol >= 0) {
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144 ioctl(mix_fd,SOUND_MIXER_WRITE_PCM,&audio_vol);
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145 audio_vol = -1; }
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146 if (mix_fd != audio_fd)
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147 close(mix_fd);
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148 mix_fd = -1; }
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149 if (audio_fd > 0) {
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150 ioctl(audio_fd,SNDCTL_DSP_SYNC,NULL);
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151 ioctl(audio_fd,SNDCTL_DSP_RESET,NULL);
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152 close(audio_fd);
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153 audio_fd = -1; }
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154 if (sig == SIGHUP && sighup_handler) sighup_handler(sig);
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155 else if (sig == SIGINT && sigint_handler) sigint_handler(sig);
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156 else exit(1);
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157 }
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158
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159 /* There is no special treatment required for parsing raw data files; we
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160 assume that these files contain data in 8bit unsigned format that
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161 has been sampled at 8kHz; there is no extra header */
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162 static size_t parseraw(void **data,size_t *sz,void **outbuf)
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163 {
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164 int rc = *sz;
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165
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166 *outbuf = *data;
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167 *sz = 0;
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168 return(rc);
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169 }
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170
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171 /* Currently we cannot cope with files in VOC format; if you really need
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172 to play these files, they should be converted by using SOX */
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173 static size_t parsevoc(void **data,size_t *sz,void **outbuf)
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174 {
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175 UNUSED(data);
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176 UNUSED(sz);
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177 UNUSED(outbuf);
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178 return(0);
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179 }
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180
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181 /* We need to perform some look-ahead in order to parse files in WAVE format;
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182 this might require re-partioning of the data segments if headers cross the
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183 boundaries between two read operations. This is done in a two-step way:
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184 first we request a certain amount of bytes... */
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185 static __inline__ int waverequire(void **data,size_t *sz,size_t rq)
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186 {
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187 int rc = 1;
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188
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189 if (rq > HEADERSZ) {
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190 warn("Header size exceeded while parsing WAVE file");
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191 parsestate.wave.state = wvFatal;
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192 *sz = 0;
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193 return(0); }
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194 if ((rq -= parsestate.wave.left) <= 0)
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195 return(rc);
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196 if (rq > *sz) {rq = *sz; rc = 0;}
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197 memcpy(parsestate.wave.leftover+parsestate.wave.left,
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198 *data,rq);
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272
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199 parsestate.wave.left += rq;
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200 (*(unsigned char **)data) += rq;
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201 *sz -= rq;
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0
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202 return(rc);
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203 }
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204
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205 /* ...and next we remove this many bytes from the buffer */
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206 static __inline__ void waveremove(size_t rq)
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207 {
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208 if (parsestate.wave.left <= rq)
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209 parsestate.wave.left = 0;
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210 else {
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211 parsestate.wave.left -= rq;
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212 memmove(parsestate.wave.leftover,
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213 parsestate.wave.leftover+rq,
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214 parsestate.wave.left); }
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215 return;
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216 }
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217
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218 /* Sound files in WAVE format can contain an arbitrary amount of tagged
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219 chunks; this requires quite some effort for parsing the data */
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220 static size_t parsewave(void **data,size_t *sz,void **outbuf)
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221 {
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222 for (;;)
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223 switch (parsestate.wave.state) {
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224 case wvMain:
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225 if (!waverequire(data,sz,20))
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226 return(0);
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227 /* Keep compatibility with Linux 68k, etc. by not relying on byte-sex */
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228 parsestate.wave.chunklength = parsestate.wave.leftover[16] +
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229 256*(parsestate.wave.leftover[17] +
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230 256*(parsestate.wave.leftover[18] +
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231 256*parsestate.wave.leftover[19]));
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232 waveremove(20);
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233 parsestate.wave.state = wvSubchunk;
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234 break;
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235 case wvSubchunk:
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236 if (!waverequire(data,sz,parsestate.wave.chunklength))
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237 return(0);
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238 parsestate.wave.align = parsestate.wave.chunklength < 14 ? 1
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239 : parsestate.wave.leftover[12];
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240 if (parsestate.wave.align != 1 &&
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241 parsestate.wave.align != 2 &&
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242 parsestate.wave.align != 4) {
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243 warn("Illegal datawidth detected while parsing WAVE file");
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244 parsestate.wave.state = wvFatal; }
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245 else
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246 parsestate.wave.state = wvOutOfBlock;
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247 waveremove(parsestate.wave.chunklength);
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248 break;
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249 case wvOutOfBlock:
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250 if (!waverequire(data,sz,8))
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251 return(0);
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252 /* Keep compatibility with Linux 68k, etc. by not relying on byte-sex */
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253 parsestate.wave.chunklength = parsestate.wave.leftover[4] +
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254 256*(parsestate.wave.leftover[5] +
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255 256*(parsestate.wave.leftover[6] +
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256 256*(parsestate.wave.leftover[7] & 0x7F)));
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257 if (memcmp(parsestate.wave.leftover,"data",4))
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258 parsestate.wave.state = wvSkipChunk;
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259 else
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260 parsestate.wave.state = wvSoundChunk;
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261 waveremove(8);
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262 break;
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263 case wvSkipChunk:
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264 if (parsestate.wave.chunklength > 0 && *sz > 0 &&
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265 (signed long)*sz < (signed long)parsestate.wave.chunklength) {
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266 parsestate.wave.chunklength -= *sz;
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267 *sz = 0; }
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268 else {
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269 if (parsestate.wave.chunklength > 0 && *sz > 0) {
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270 *sz -= parsestate.wave.chunklength;
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272
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271 (*(unsigned char **)data) += parsestate.wave.chunklength; }
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0
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272 parsestate.wave.state = wvOutOfBlock; }
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273 break;
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274 case wvSoundChunk: {
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275 size_t count,rq;
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276 if (parsestate.wave.left) { /* handle leftover bytes from last
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277 alignment operation */
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278 count = parsestate.wave.left;
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279 rq = HEADERSZ-count;
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272
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280 if (rq > (size_t) parsestate.wave.chunklength)
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0
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281 rq = parsestate.wave.chunklength;
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282 if (!waverequire(data,sz,rq)) {
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283 parsestate.wave.chunklength -= parsestate.wave.left - count;
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284 return(0); }
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285 parsestate.wave.chunklength -= rq;
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286 *outbuf = parsestate.wave.leftover;
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287 parsestate.wave.left = 0;
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288 return(rq); }
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272
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289 if (*sz >= (size_t) parsestate.wave.chunklength) {
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0
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290 count = parsestate.wave.chunklength;
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291 rq = 0; }
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292 else {
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293 count = *sz;
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294 count -= rq = count % parsestate.wave.align; }
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295 *outbuf = *data;
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272
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296 (*(unsigned char **)data) += count;
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297 *sz -= count;
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0
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298 if ((parsestate.wave.chunklength -= count) < parsestate.wave.align) {
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299 parsestate.wave.state = wvOutOfBlock;
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300 /* Some broken software (e.g. SOX) attaches junk to the end of a sound
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301 chunk; so, let's ignore this... */
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302 if (parsestate.wave.chunklength)
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303 parsestate.wave.state = wvSkipChunk; }
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304 else if (rq)
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305 /* align data length to a multiple of datasize; keep additional data
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110
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306 in "leftover" buffer --- this is necessary to ensure proper
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0
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307 functioning of the sndcnv... routines */
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308 waverequire(data,sz,rq);
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309 return(count); }
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310 case wvFatalNotify:
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311 warn("Irrecoverable error while parsing WAVE file");
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312 parsestate.wave.state = wvFatal;
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313 break;
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314 case wvFatal:
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315 default:
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316 *sz = 0;
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317 return(0); }
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318 }
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319
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320 /* Strip the header from files in Sun/DEC audio format; this requires some
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321 extra processing as the header can be an arbitrary size and it might
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322 result in alignment errors for subsequent conversions --- thus we do
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323 some buffering, where needed */
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324 static size_t parsesundecaudio(void **data,size_t *sz,void **outbuf)
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325 {
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326 /* There is data left over from the last invocation of this function; join
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327 it with the new data and return a sound chunk that is as big as a
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328 single entry */
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329 if (parsestate.audio.left) {
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272
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330 if (parsestate.audio.left + *sz > (size_t) parsestate.audio.align) {
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0
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331 int count;
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332 memmove(parsestate.audio.leftover + parsestate.audio.left,
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333 *data,
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334 count = parsestate.audio.align - parsestate.audio.left);
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335 *outbuf = parsestate.audio.leftover;
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336 *sz -= count;
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337 *data = (*(char **)data) + count;
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338 parsestate.audio.left = 0;
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339 return(parsestate.audio.align); }
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340 else {
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341 /* We need even more data in order to get one complete single entry! */
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342 memmove(parsestate.audio.leftover + parsestate.audio.left,
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343 *data,
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344 *sz);
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345 *data = (*(char **)data) + *sz;
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346 parsestate.audio.left += *sz;
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347 *sz = 0;
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348 return(0); } }
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349
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350 /* This is the main sound chunk, strip of any extra data that does not fit
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351 the alignment requirements and move these bytes into the leftover buffer*/
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352 if (parsestate.audio.isdata) {
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353 int rc = *sz;
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354 *outbuf = *data;
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355 if ((parsestate.audio.left = rc % parsestate.audio.align) != 0) {
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356 memmove(parsestate.audio.leftover,
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357 (char *)*outbuf + rc - parsestate.audio.left,
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358 parsestate.audio.left);
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359 rc -= parsestate.audio.left; }
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360 *sz = 0;
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361 return(rc); }
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362
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363 /* This is the first invocation of this function; we need to parse the
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364 header information and determine how many bytes we need to skip until
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365 the start of the sound chunk */
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366 if (!parsestate.audio.skipping) {
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272
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367 unsigned char *header = (unsigned char *) *data;
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0
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368 if (*sz < 8) {
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369 warn("Irrecoverable error while parsing Sun/DEC audio file");
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370 return(0); }
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371 /* Keep compatibility with Linux 68k, etc. by not relying on byte-sex */
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372 if (header[3]) { /* Sun audio (big endian) */
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373 parsestate.audio.align = ((header[15] > 2)+1)*header[23];
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374 parsestate.audio.skipping = header[7]+256*(header[6]+256*
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375 (header[5]+256*header[4])); }
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|
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376 else { /* DEC audio (little endian) */
|
|
|
377 parsestate.audio.align = ((header[12] > 2)+1)*header[20];
|
|
|
378 parsestate.audio.skipping = header[4]+256*(header[5]+256*
|
|
|
379 (header[6]+256*header[7])); }}
|
|
|
380
|
|
|
381 /* We are skipping extra data that has been attached to header; most usually
|
|
|
382 this will be just a comment, such as the original filename and/or the
|
|
|
383 creation date. Make sure that we do not return less than one single sound
|
|
|
384 sample entry to the caller; if this happens, rather decide to move those
|
|
|
385 few bytes into the leftover buffer and deal with it later */
|
|
272
|
386 if (*sz >= (size_t) parsestate.audio.skipping) {
|
|
0
|
387 /* Skip just the header information and return the sound chunk */
|
|
|
388 int rc = *sz - parsestate.audio.skipping;
|
|
|
389 *outbuf = (char *)*data + parsestate.audio.skipping;
|
|
|
390 if ((parsestate.audio.left = rc % parsestate.audio.align) != 0) {
|
|
|
391 memmove(parsestate.audio.leftover,
|
|
|
392 (char *)*outbuf + rc - parsestate.audio.left,
|
|
|
393 parsestate.audio.left);
|
|
|
394 rc -= parsestate.audio.left; }
|
|
|
395 *sz = 0;
|
|
|
396 parsestate.audio.skipping = 0;
|
|
|
397 parsestate.audio.isdata++;
|
|
|
398 return(rc); }
|
|
|
399 else {
|
|
|
400 /* Skip everything */
|
|
|
401 parsestate.audio.skipping -= *sz;
|
|
|
402 return(0); }
|
|
|
403 }
|
|
|
404
|
|
|
405 /* If the soundcard could not be set to natively support the data format, we
|
|
|
406 try to do some limited on-the-fly conversion to a different format; if
|
|
|
407 no conversion is needed, though, we can output directly */
|
|
|
408 static size_t sndcnvnop(void **data,size_t *sz,void **outbuf)
|
|
|
409 {
|
|
|
410 int rc = *sz;
|
|
|
411
|
|
|
412 *outbuf = *data;
|
|
|
413 *sz = 0;
|
|
|
414 return(rc);
|
|
|
415 }
|
|
|
416
|
|
|
417 /* Convert 8 bit unsigned stereo data to 8 bit unsigned mono data */
|
|
|
418 static size_t sndcnv8U_2mono(void **data,size_t *sz,void **outbuf)
|
|
|
419 {
|
|
203
|
420 REGISTER unsigned char *src;
|
|
|
421 REGISTER unsigned char *dest;
|
|
0
|
422 int rc,count;
|
|
|
423
|
|
|
424 count = *sz / 2;
|
|
|
425 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
426 else *sz = 0;
|
|
|
427 rc = count;
|
|
272
|
428 src = (unsigned char *) *data;
|
|
0
|
429 *outbuf =
|
|
124
|
430 dest = linuxplay_sndbuf;
|
|
0
|
431 while (count--)
|
|
272
|
432 *dest++ = (unsigned char)(((int)*(src)++ +
|
|
|
433 (int)*(src)++) / 2);
|
|
0
|
434 *data = src;
|
|
|
435 return(rc);
|
|
|
436 }
|
|
|
437
|
|
|
438 /* Convert 8 bit signed stereo data to 8 bit signed mono data */
|
|
|
439 static size_t sndcnv8S_2mono(void **data,size_t *sz,void **outbuf)
|
|
|
440 {
|
|
203
|
441 REGISTER unsigned char *src;
|
|
|
442 REGISTER unsigned char *dest;
|
|
272
|
443 int rc, count;
|
|
0
|
444
|
|
|
445 count = *sz / 2;
|
|
|
446 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
447 else *sz = 0;
|
|
|
448 rc = count;
|
|
272
|
449 src = (unsigned char *) *data;
|
|
0
|
450 *outbuf =
|
|
124
|
451 dest = linuxplay_sndbuf;
|
|
0
|
452 while (count--)
|
|
272
|
453 *dest++ = (unsigned char)(((int)*((signed char *)(src++)) +
|
|
|
454 (int)*((signed char *)(src++))) / 2);
|
|
0
|
455 *data = src;
|
|
|
456 return(rc);
|
|
|
457 }
|
|
|
458
|
|
|
459 /* Convert 8 bit signed stereo data to 8 bit unsigned mono data */
|
|
|
460 static size_t sndcnv2monounsigned(void **data,size_t *sz,void **outbuf)
|
|
|
461 {
|
|
203
|
462 REGISTER unsigned char *src;
|
|
|
463 REGISTER unsigned char *dest;
|
|
0
|
464 int rc,count;
|
|
|
465
|
|
|
466 count = *sz / 2;
|
|
|
467 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
468 else *sz = 0;
|
|
|
469 rc = count;
|
|
272
|
470 src = (unsigned char *) *data;
|
|
0
|
471 *outbuf =
|
|
124
|
472 dest = linuxplay_sndbuf;
|
|
0
|
473 while (count--)
|
|
272
|
474 *dest++ = (unsigned char)(((int)*((signed char *)(src++)) +
|
|
|
475 (int)*((signed char *)(src++))) / 2) ^ 0x80;
|
|
0
|
476 *data = src;
|
|
|
477 return(rc);
|
|
|
478 }
|
|
|
479
|
|
|
480 /* Convert 8 bit signed mono data to 8 bit unsigned mono data */
|
|
|
481 static size_t sndcnv2unsigned(void **data,size_t *sz,void **outbuf)
|
|
|
482 {
|
|
203
|
483 REGISTER unsigned char *src;
|
|
|
484 REGISTER unsigned char *dest;
|
|
0
|
485 int rc,count;
|
|
|
486
|
|
|
487 count = *sz;
|
|
|
488 if (count > SNDBUFSZ) { *sz -= SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
489 else *sz = 0;
|
|
|
490 rc = count;
|
|
272
|
491 src = (unsigned char *) *data;
|
|
0
|
492 *outbuf =
|
|
124
|
493 dest = linuxplay_sndbuf;
|
|
0
|
494 while (count--)
|
|
272
|
495 *dest++ = *(src)++ ^ 0x80;
|
|
0
|
496 *data = src;
|
|
|
497 return(rc);
|
|
|
498 }
|
|
|
499
|
|
|
500 /* Convert a number in the range -32768..32767 to an 8 bit ulaw encoded
|
|
|
501 number --- I hope, I got this conversion right :-) */
|
|
|
502 static __inline__ signed char int2ulaw(int i)
|
|
|
503 {
|
|
|
504 /* Lookup table for fast calculation of number of bits that need shifting*/
|
|
|
505 static short int t_bits[128] = {
|
|
|
506 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,
|
|
|
507 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,
|
|
|
508 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,
|
|
|
509 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};
|
|
203
|
510 REGISTER int bits,logi;
|
|
0
|
511
|
|
|
512 /* unrolling this condition (hopefully) improves execution speed */
|
|
|
513 if (i < 0) {
|
|
|
514 if ((i = (132-i)) > 0x7FFF) i = 0x7FFF;
|
|
|
515 logi = (i >> ((bits = t_bits[i/256])+4));
|
|
|
516 return((bits << 4 | logi) ^ 0x7F); }
|
|
|
517 else {
|
|
|
518 if ((i = 132+i) > 0x7FFF) i = 0x7FFF;
|
|
|
519 logi = (i >> ((bits = t_bits[i/256])+4));
|
|
|
520 return(~(bits << 4 | logi)); }
|
|
|
521 }
|
|
|
522
|
|
|
523 /* Convert 8 bit ulaw stereo data to 8 bit ulaw mono data */
|
|
|
524 static size_t sndcnvULaw_2mono(void **data,size_t *sz,void **outbuf)
|
|
|
525 {
|
|
|
526
|
|
|
527 static short int ulaw2int[256] = {
|
|
|
528 /* Precomputed lookup table for conversion from ulaw to 15 bit signed */
|
|
|
529 -16062,-15550,-15038,-14526,-14014,-13502,-12990,-12478,
|
|
|
530 -11966,-11454,-10942,-10430, -9918, -9406, -8894, -8382,
|
|
|
531 -7998, -7742, -7486, -7230, -6974, -6718, -6462, -6206,
|
|
|
532 -5950, -5694, -5438, -5182, -4926, -4670, -4414, -4158,
|
|
|
533 -3966, -3838, -3710, -3582, -3454, -3326, -3198, -3070,
|
|
|
534 -2942, -2814, -2686, -2558, -2430, -2302, -2174, -2046,
|
|
|
535 -1950, -1886, -1822, -1758, -1694, -1630, -1566, -1502,
|
|
|
536 -1438, -1374, -1310, -1246, -1182, -1118, -1054, -990,
|
|
|
537 -942, -910, -878, -846, -814, -782, -750, -718,
|
|
|
538 -686, -654, -622, -590, -558, -526, -494, -462,
|
|
|
539 -438, -422, -406, -390, -374, -358, -342, -326,
|
|
|
540 -310, -294, -278, -262, -246, -230, -214, -198,
|
|
|
541 -186, -178, -170, -162, -154, -146, -138, -130,
|
|
|
542 -122, -114, -106, -98, -90, -82, -74, -66,
|
|
|
543 -60, -56, -52, -48, -44, -40, -36, -32,
|
|
|
544 -28, -24, -20, -16, -12, -8, -4, +0,
|
|
|
545 +16062,+15550,+15038,+14526,+14014,+13502,+12990,+12478,
|
|
|
546 +11966,+11454,+10942,+10430, +9918, +9406, +8894, +8382,
|
|
|
547 +7998, +7742, +7486, +7230, +6974, +6718, +6462, +6206,
|
|
|
548 +5950, +5694, +5438, +5182, +4926, +4670, +4414, +4158,
|
|
|
549 +3966, +3838, +3710, +3582, +3454, +3326, +3198, +3070,
|
|
|
550 +2942, +2814, +2686, +2558, +2430, +2302, +2174, +2046,
|
|
|
551 +1950, +1886, +1822, +1758, +1694, +1630, +1566, +1502,
|
|
|
552 +1438, +1374, +1310, +1246, +1182, +1118, +1054, +990,
|
|
|
553 +942, +910, +878, +846, +814, +782, +750, +718,
|
|
|
554 +686, +654, +622, +590, +558, +526, +494, +462,
|
|
|
555 +438, +422, +406, +390, +374, +358, +342, +326,
|
|
|
556 +310, +294, +278, +262, +246, +230, +214, +198,
|
|
|
557 +186, +178, +170, +162, +154, +146, +138, +130,
|
|
|
558 +122, +114, +106, +98, +90, +82, +74, +66,
|
|
|
559 +60, +56, +52, +48, +44, +40, +36, +32,
|
|
|
560 +28, +24, +20, +16, +12, +8, +4, +0};
|
|
|
561
|
|
203
|
562 REGISTER unsigned char *src;
|
|
|
563 REGISTER unsigned char *dest;
|
|
0
|
564 int rc,count;
|
|
|
565
|
|
|
566 count = *sz / 2;
|
|
|
567 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
568 else *sz = 0;
|
|
|
569 rc = count;
|
|
272
|
570 src = (unsigned char *) *data;
|
|
0
|
571 *outbuf =
|
|
124
|
572 dest = linuxplay_sndbuf;
|
|
0
|
573 while (count--)
|
|
|
574 /* it is not possible to directly interpolate between two ulaw encoded
|
|
|
575 data bytes, thus we need to convert to linear format first and later
|
|
|
576 we convert back to ulaw format */
|
|
272
|
577 *dest++ = int2ulaw(ulaw2int[*(src)++] +
|
|
|
578 ulaw2int[*(src)++]);
|
|
|
579 *data = src;
|
|
0
|
580 return(rc);
|
|
|
581 }
|
|
|
582
|
|
|
583 /* Convert 16 bit little endian signed stereo data to 16 bit little endian
|
|
|
584 signed mono data */
|
|
|
585 static size_t sndcnv16_2monoLE(void **data,size_t *sz,void **outbuf)
|
|
|
586 {
|
|
203
|
587 REGISTER unsigned char *src;
|
|
|
588 REGISTER unsigned char *dest;
|
|
0
|
589 int rc,count;
|
|
|
590 signed short i;
|
|
|
591
|
|
|
592 count = *sz / 2;
|
|
|
593 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
594 else *sz = 0;
|
|
|
595 rc = count;
|
|
272
|
596 src = (unsigned char *) *data;
|
|
0
|
597 *outbuf =
|
|
124
|
598 dest = linuxplay_sndbuf;
|
|
0
|
599 for (count /= 2; count--; ) {
|
|
272
|
600 i = ((int)(src[0]) +
|
|
|
601 256*(int)(src[1]) +
|
|
|
602 (int)(src[2]) +
|
|
|
603 256*(int)(src[3])) / 2;
|
|
0
|
604 src += 4;
|
|
|
605 *dest++ = (unsigned char)(i & 0xFF);
|
|
|
606 *dest++ = (unsigned char)((i / 256) & 0xFF); }
|
|
272
|
607 *data = src;
|
|
0
|
608 return(rc);
|
|
|
609 }
|
|
|
610
|
|
|
611 /* Convert 16 bit big endian signed stereo data to 16 bit big endian
|
|
|
612 signed mono data */
|
|
|
613 static size_t sndcnv16_2monoBE(void **data,size_t *sz,void **outbuf)
|
|
|
614 {
|
|
203
|
615 REGISTER unsigned char *src;
|
|
|
616 REGISTER unsigned char *dest;
|
|
0
|
617 int rc,count;
|
|
|
618 signed short i;
|
|
|
619
|
|
|
620 count = *sz / 2;
|
|
|
621 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
622 else *sz = 0;
|
|
|
623 rc = count;
|
|
272
|
624 src = (unsigned char *) *data;
|
|
0
|
625 *outbuf =
|
|
124
|
626 dest = linuxplay_sndbuf;
|
|
0
|
627 for (count /= 2; count--; ) {
|
|
272
|
628 i = ((int)(src[1]) +
|
|
|
629 256*(int)(src[0]) +
|
|
|
630 (int)(src[3]) +
|
|
|
631 256*(int)(src[2])) / 2;
|
|
0
|
632 src += 4;
|
|
|
633 *dest++ = (unsigned char)((i / 256) & 0xFF);
|
|
|
634 *dest++ = (unsigned char)(i & 0xFF); }
|
|
272
|
635 *data = src;
|
|
0
|
636 return(rc);
|
|
|
637 }
|
|
|
638
|
|
|
639 /* Convert 16 bit little endian signed data to 8 bit unsigned data */
|
|
|
640 static size_t sndcnv2byteLE(void **data,size_t *sz,void **outbuf)
|
|
|
641 {
|
|
203
|
642 REGISTER unsigned char *src;
|
|
|
643 REGISTER unsigned char *dest;
|
|
0
|
644 int rc,count;
|
|
|
645
|
|
|
646 count = *sz / 2;
|
|
|
647 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
648 else *sz = 0;
|
|
|
649 rc = count;
|
|
272
|
650 src = (unsigned char *) *data;
|
|
0
|
651 *outbuf =
|
|
124
|
652 dest = linuxplay_sndbuf;
|
|
0
|
653 while (count--) {
|
|
|
654 *dest++ = (unsigned char)(((signed char *)src)[1] ^ (signed char)0x80);
|
|
272
|
655 src += 2;
|
|
|
656 }
|
|
|
657 *data = src;
|
|
0
|
658 return(rc);
|
|
|
659 }
|
|
|
660
|
|
|
661 /* Convert 16 bit big endian signed data to 8 bit unsigned data */
|
|
|
662 static size_t sndcnv2byteBE(void **data,size_t *sz,void **outbuf)
|
|
|
663 {
|
|
203
|
664 REGISTER unsigned char *src;
|
|
|
665 REGISTER unsigned char *dest;
|
|
0
|
666 int rc,count;
|
|
|
667
|
|
|
668 count = *sz / 2;
|
|
|
669 if (count > SNDBUFSZ) { *sz -= 2*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
670 else *sz = 0;
|
|
|
671 rc = count;
|
|
272
|
672 src = (unsigned char *) *data;
|
|
0
|
673 *outbuf =
|
|
124
|
674 dest = linuxplay_sndbuf;
|
|
0
|
675 while (count--) {
|
|
|
676 *dest++ = (unsigned char)(((signed char *)src)[0] ^ (signed char)0x80);
|
|
272
|
677 src += 2;
|
|
|
678 }
|
|
|
679 *data = src;
|
|
0
|
680 return(rc);
|
|
|
681 }
|
|
|
682
|
|
|
683 /* Convert 16 bit little endian signed stereo data to 8 bit unsigned
|
|
|
684 mono data */
|
|
|
685 static size_t sndcnv2monobyteLE(void **data,size_t *sz,void **outbuf)
|
|
|
686 {
|
|
203
|
687 REGISTER unsigned char *src;
|
|
|
688 REGISTER unsigned char *dest;
|
|
0
|
689 int rc,count;
|
|
|
690
|
|
|
691 count = *sz / 4;
|
|
|
692 if (count > SNDBUFSZ) { *sz -= 4*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
693 else *sz = 0;
|
|
|
694 rc = count;
|
|
272
|
695 src = (unsigned char *) *data;
|
|
0
|
696 *outbuf =
|
|
124
|
697 dest = linuxplay_sndbuf;
|
|
0
|
698 while (count--) {
|
|
|
699 *dest++ = (unsigned char)(((int)((signed char *)src)[1] +
|
|
|
700 (int)((signed char *)src)[3]) / 2 ^ 0x80);
|
|
272
|
701 src += 4;
|
|
|
702 }
|
|
|
703 *data = src;
|
|
0
|
704 return(rc);
|
|
|
705 }
|
|
|
706
|
|
|
707 /* Convert 16 bit big endian signed stereo data to 8 bit unsigned
|
|
|
708 mono data */
|
|
|
709 static size_t sndcnv2monobyteBE(void **data,size_t *sz,void **outbuf)
|
|
|
710 {
|
|
203
|
711 REGISTER unsigned char *src;
|
|
|
712 REGISTER unsigned char *dest;
|
|
0
|
713 int rc,count;
|
|
|
714
|
|
|
715 count = *sz / 4;
|
|
|
716 if (count > SNDBUFSZ) { *sz -= 4*SNDBUFSZ; count = SNDBUFSZ; }
|
|
|
717 else *sz = 0;
|
|
|
718 rc = count;
|
|
272
|
719 src = (unsigned char *) *data;
|
|
0
|
720 *outbuf =
|
|
124
|
721 dest = linuxplay_sndbuf;
|
|
0
|
722 while (count--) {
|
|
|
723 *dest++ = (unsigned char)(((int)((signed char *)src)[0] +
|
|
|
724 (int)((signed char *)src)[2]) / 2 ^ 0x80);
|
|
272
|
725 src += 4;
|
|
|
726 }
|
|
|
727 *data = src;
|
|
0
|
728 return(rc);
|
|
|
729 }
|
|
|
730
|
|
|
731 /* Look at the header of the sound file and try to determine the format;
|
|
|
732 we can recognize files in VOC, WAVE, and, Sun/DEC-audio format--- everything
|
|
|
733 else is assumed to be raw 8 bit unsigned data sampled at 8kHz */
|
|
|
734 static fmtType analyze_format(unsigned char *format,int *fmt,int *speed,
|
|
|
735 int *tracks,
|
|
|
736 size_t (**parsesndfile)(void **,size_t *sz,
|
|
|
737 void **))
|
|
|
738 {
|
|
|
739 /* Keep compatibility with Linux 68k, etc. by not relying on byte-sex */
|
|
|
740 if (!memcmp(format,"Creative Voice File\x1A\x1A\x00",22) &&
|
|
|
741 (format[22]+256*format[23]) ==
|
|
|
742 ((0x1233-format[24]-256*format[25])&0xFFFF)) { /* VOC */
|
|
|
743 *fmt = AFMT_U8;
|
|
|
744 *speed = 8000;
|
|
|
745 *tracks = 2;
|
|
|
746 *parsesndfile = parsevoc;
|
|
|
747 return(fmtVoc); }
|
|
|
748 else if (!memcmp(format,"RIFF",4) &&
|
|
|
749 !memcmp(format+8,"WAVEfmt ",8)) { /* WAVE */
|
|
|
750 if (memcmp(format+20,"\001\000\001"/* PCM mono */,4) &&
|
|
|
751 memcmp(format+20,"\001\000\002"/* PCM stereo */,4))
|
|
|
752 return(fmtIllegal);
|
|
|
753 *fmt = (format[32]/(*tracks = format[22])) == 1 ?
|
|
|
754 AFMT_U8 : AFMT_S16_LE;
|
|
|
755 /* Keep compatibility with Linux 68k, etc. by not relying on byte-sex */
|
|
|
756 *speed = format[24]+256*(format[25]+256*
|
|
|
757 (format[26]+256*format[27]));
|
|
|
758 *parsesndfile = parsewave;
|
|
|
759 return(fmtWave); }
|
|
|
760 else if (!memcmp(format,".snd",4)) { /* Sun Audio (big endian) */
|
|
|
761 if (format[7]+256*(format[6]+256*(format[5]+256*format[4])) < 24) {
|
|
|
762 *fmt = AFMT_MU_LAW;
|
|
|
763 *speed = 8000;
|
|
|
764 *tracks = 1;
|
|
|
765 *parsesndfile = parsesundecaudio;
|
|
|
766 return(fmtSunAudio); }
|
|
|
767 if (!memcmp(format+12,"\000\000\000\001",4)) *fmt = AFMT_MU_LAW;
|
|
|
768 else if (!memcmp(format+12,"\000\000\000\002",4)) *fmt = AFMT_S8;
|
|
|
769 else if (!memcmp(format+12,"\000\000\000\003",4)) *fmt = AFMT_S16_BE;
|
|
|
770 else return(fmtIllegal);
|
|
|
771 /* Keep compatibility with Linux 68k, etc. by not relying on byte-sex */
|
|
|
772 *speed = format[19]+256*(format[18]+256*
|
|
|
773 (format[17]+256*format[16]));
|
|
|
774 *tracks = format[23];
|
|
|
775 *parsesndfile = parsesundecaudio;
|
|
|
776 return(fmtSunAudio); }
|
|
|
777 else if (!memcmp(format,".sd",4)) { /* DEC Audio (little endian) */
|
|
|
778 if (format[4]+256*(format[5]+256*(format[6]+256*format[7])) < 24) {
|
|
|
779 *fmt = AFMT_MU_LAW;
|
|
|
780 *speed = 8000;
|
|
|
781 *tracks = 1;
|
|
|
782 *parsesndfile = parsesundecaudio;
|
|
|
783 return(fmtSunAudio); }
|
|
|
784 if (!memcmp(format+12,"\001\000\000",4)) *fmt = AFMT_MU_LAW;
|
|
|
785 else if (!memcmp(format+12,"\002\000\000",4)) *fmt = AFMT_S8;
|
|
|
786 else if (!memcmp(format+12,"\003\000\000",4)) *fmt = AFMT_S16_LE;
|
|
|
787 else return(fmtIllegal);
|
|
|
788 /* Keep compatibility with Linux 68k, etc. by not relying on byte-sex */
|
|
|
789 *speed = format[16]+256*(format[17]+256*
|
|
|
790 (format[18]+256*format[19]));
|
|
|
791 *tracks = format[20];
|
|
|
792 *parsesndfile = parsesundecaudio;
|
|
|
793 return(fmtSunAudio); }
|
|
|
794 else {
|
|
|
795 *fmt = AFMT_U8;
|
|
|
796 *speed = 8000;
|
|
|
797 *tracks = 1;
|
|
|
798 *parsesndfile = parseraw;
|
|
|
799 return(fmtRaw); }
|
|
|
800 }
|
|
|
801
|
|
|
802 /* Initialize the soundcard and mixer device with the parameters that we
|
|
|
803 found in the header of the sound file. If the soundcard is not capable of
|
|
|
804 natively supporting the required parameters, then try to set up conversion
|
|
|
805 routines.
|
|
|
806 The difficulty with setting up the sound card is that the parameters are
|
|
|
807 not fully orthogonal; changing one of them might affect some of the
|
|
|
808 others, too. Thus we do quite a lot of double checking; actually most of
|
|
|
809 this is not needed right now, but it will come in handy, if the kernel's
|
|
|
810 sounddriver ever changes or if third-party sounddrivers are used. */
|
|
|
811 static int audio_init(int mixx_fd, int auddio_fd, int fmt, int speed,
|
|
|
812 int tracks, int *volume,
|
|
|
813 size_t (**sndcnv) (void **, size_t *sz, void **))
|
|
|
814 {
|
|
|
815 int i,the_speed,the_stereo,the_fmt;
|
|
|
816
|
|
|
817 *sndcnv = sndcnvnop;
|
|
|
818
|
|
|
819 if (ioctl(auddio_fd,SNDCTL_DSP_SYNC,NULL) < 0) {
|
|
|
820 perror("SNDCTL_DSP_SYNC");
|
|
|
821 return(0); }
|
|
|
822
|
|
|
823 /* Initialize sound hardware with prefered parameters */
|
|
272
|
824
|
|
0
|
825 /* If the sound hardware cannot support 16 bit format or requires a
|
|
|
826 different byte sex then try to drop to 8 bit format */
|
|
129
|
827
|
|
|
828 the_fmt = fmt;
|
|
|
829 if(ioctl(audio_fd,SNDCTL_DSP_SETFMT,&the_fmt) < 0) {
|
|
|
830 perror("SNDCTL_DSP_SETFMT");
|
|
|
831 return(0);
|
|
|
832 }
|
|
|
833
|
|
0
|
834 if (fmt != the_fmt) {
|
|
|
835 if (fmt == AFMT_S16_LE || fmt == AFMT_S16_BE) {
|
|
|
836 *sndcnv = fmt == AFMT_S16_BE ? sndcnv2byteBE : sndcnv2byteLE;
|
|
|
837 if (((i=fmt=AFMT_U8),ioctl(audio_fd,SNDCTL_DSP_SETFMT,&i)) < 0 ||
|
|
|
838 fmt != i || ioctl(audio_fd,SNDCTL_DSP_SETFMT,&the_fmt) < 0 ||
|
|
|
839 fmt != the_fmt) {
|
|
|
840 perror("SNDCTL_DSP_SETFMT");
|
|
|
841 return(0); } }
|
|
209
|
842 else if (fmt == AFMT_MU_LAW && the_fmt == AFMT_U8 ) {
|
|
|
843 /* the kernel will convert for us */ }
|
|
0
|
844 else {
|
|
|
845 perror("SNDCTL_DSP_SETFMT");
|
|
|
846 return(0); } }
|
|
|
847 else if (fmt == AFMT_S8) {
|
|
|
848 *sndcnv = sndcnv2unsigned;
|
|
|
849 if (((i=fmt=AFMT_U8),ioctl(audio_fd,SNDCTL_DSP_SETFMT,&i)) < 0 ||
|
|
|
850 fmt != i || ioctl(audio_fd,SNDCTL_DSP_SETFMT,&the_fmt) < 0 ||
|
|
|
851 fmt != the_fmt) {
|
|
|
852 perror("SNDCTRL_DSP_SETFMT");
|
|
|
853 return(0); } }
|
|
|
854
|
|
129
|
855 /* The PCSP driver does not support reading of the sampling rate via the
|
|
272
|
856 SOUND_PCM_READ_RATE ioctl; determine "the_speed" here */
|
|
129
|
857 the_speed = speed; ioctl(audio_fd,SNDCTL_DSP_SPEED,&the_speed);
|
|
|
858 /* The PCSP driver does not support reading of the mono/stereo flag, thus
|
|
|
859 we assume, that failure to change this mode means we are in mono mode */
|
|
|
860 if (((i = (the_stereo = tracks)-1),ioctl(audio_fd,SNDCTL_DSP_STEREO,&i)) < 0)
|
|
|
861 the_stereo = 1;
|
|
|
862
|
|
0
|
863 /* Try to request stereo playback (if needed); if this cannot be supported
|
|
|
864 by the hardware, then install conversion routines for mono playback */
|
|
|
865
|
|
|
866 /* This ioctl will fail if we use the PCSP driver; thus the value of
|
|
|
867 "the_stereo" is still unchanged */
|
|
|
868 ioctl(audio_fd,SOUND_PCM_READ_CHANNELS,&the_stereo);
|
|
|
869 if (tracks != the_stereo) {
|
|
|
870 if (tracks == 2) {
|
|
|
871 tracks = 1;
|
|
|
872 *sndcnv = *sndcnv == sndcnv2byteLE ? sndcnv2monobyteLE :
|
|
|
873 *sndcnv == sndcnv2byteBE ? sndcnv2monobyteBE :
|
|
|
874 *sndcnv == sndcnv2unsigned ? sndcnv2monounsigned :
|
|
|
875 the_fmt == AFMT_S16_LE ? sndcnv16_2monoLE :
|
|
|
876 the_fmt == AFMT_S16_BE ? sndcnv16_2monoBE :
|
|
|
877 the_fmt == AFMT_S8 ? sndcnv8S_2mono :
|
|
|
878 the_fmt == AFMT_U8 ? sndcnv8U_2mono :
|
|
|
879 the_fmt == AFMT_MU_LAW ? sndcnvULaw_2mono : NULL;
|
|
|
880 if (*sndcnv == NULL) { /* this should not happen */
|
|
|
881 perror("SNDCTL_DSP_STEREO");
|
|
|
882 return(0); }
|
|
|
883 /* Switch to mono mode */
|
|
|
884 if (((i = 0),ioctl(audio_fd,SNDCTL_DSP_STEREO,&i)) < 0 || i) {
|
|
|
885 perror("SNDCTL_DSP_STEREO");
|
|
|
886 return(0); }
|
|
|
887 /* Now double check that everything is set as expected */
|
|
|
888 if (((i = AFMT_QUERY),ioctl(audio_fd,SNDCTL_DSP_SETFMT,&i)) < 0 ||
|
|
|
889 (i != the_fmt &&
|
|
|
890 (((i=the_fmt),ioctl(audio_fd,SNDCTL_DSP_SETFMT,&i)) < 0 ||
|
|
|
891 i != the_fmt ||
|
|
|
892 ((i = AFMT_QUERY),ioctl(audio_fd,SNDCTL_DSP_SETFMT,&i)) < 0 ||
|
|
|
893 i != the_fmt)) ||
|
|
|
894 (ioctl(audio_fd,SOUND_PCM_READ_CHANNELS,&i) >= 0 &&
|
|
|
895 i != 1)) {
|
|
|
896 /* There was no way that we could set the soundcard to a meaningful
|
|
|
897 mode */
|
|
|
898 perror("SNDCTL_DSP_SETFMT and SNDCTL_DSP_STEREO");
|
|
|
899 return(0); } }
|
|
|
900 else {
|
|
|
901 /* Somebody set the soundcard to stereo even though we requested
|
|
|
902 mono; this should not happen... */
|
|
|
903 if (((i = the_stereo = tracks),ioctl(audio_fd,SNDCTL_DSP_STEREO,&i))<0 ||
|
|
|
904 i != the_stereo-1) {
|
|
|
905 perror("SNDCTL_DSP_STEREO");
|
|
|
906 return(0); }
|
|
|
907 if (((i = AFMT_QUERY),ioctl(audio_fd,SNDCTL_DSP_SETFMT,&i)) < 0 ||
|
|
|
908 i != the_fmt) {
|
|
|
909 perror("SNDCTL_DSP_SETFMT");
|
|
|
910 return(0); } } }
|
|
|
911
|
|
|
912 /* Fail if deviations from desired sampling frequency are too big */
|
|
|
913
|
|
|
914 /* This ioctl will fail if we use the PCSP driver; thus the value of
|
|
|
915 "the_speed" is still unchanged */
|
|
|
916 ioctl(audio_fd,SOUND_PCM_READ_RATE,&the_speed);
|
|
|
917 if (speed*14 < the_speed*10 || speed*6 > the_speed*10) {
|
|
|
918 char buffer[256];
|
|
|
919 sprintf(buffer,"SNDCTL_DSP_SPEED (req: %d, rtn: %d)",speed,the_speed);
|
|
|
920 perror(buffer);
|
|
|
921 return(0); }
|
|
272
|
922
|
|
0
|
923 /* Use the mixer device for setting the playback volume */
|
|
|
924 if (mixx_fd > 0) {
|
|
|
925 int vol = *volume & 0xFF;
|
|
|
926 if (ioctl(mixx_fd,SOUND_MIXER_READ_PCM,volume) < 0)
|
|
|
927 *volume = -1;
|
|
|
928 if (vol < 0) vol = 0; else if (vol > 100) vol = 100;
|
|
|
929 #ifdef NOVOLUMECTRLFORMULAW
|
|
|
930 if (fmt == AFMT_MU_LAW)
|
|
|
931 vol = 100;
|
|
|
932 #endif
|
|
|
933 vol |= 256*vol;
|
|
|
934 /* Do not signal an error, if volume control is unavailable! */
|
|
|
935 ioctl(mixx_fd,SOUND_MIXER_WRITE_PCM,&vol); }
|
|
|
936
|
|
|
937 #if defined(LINUXPLAYSTANDALONE) && 1
|
|
|
938 /* Debugging output is displayed only when compiled as stand-alone version */
|
|
|
939 {int the_volume;
|
|
|
940 the_fmt = AFMT_QUERY;
|
|
|
941 ioctl(audio_fd,SNDCTL_DSP_SETFMT,&the_fmt);
|
|
|
942 ioctl(auddio_fd,SOUND_PCM_READ_CHANNELS,&the_stereo);
|
|
|
943 ioctl(auddio_fd,SOUND_PCM_READ_RATE,&the_speed);
|
|
|
944 ioctl(mixx_fd,SOUND_MIXER_READ_PCM,&the_volume);
|
|
|
945 fprintf(stderr,"%s, %s, %dHz, L:%d/R:%d\n",
|
|
|
946 the_fmt == AFMT_MU_LAW ? "AFMT_MU_LAW" :
|
|
|
947 the_fmt == AFMT_A_LAW ? "AFMT_A_LAW" :
|
|
|
948 the_fmt == AFMT_IMA_ADPCM ? "AFMT_IMA_ADPCM" :
|
|
|
949 the_fmt == AFMT_U8 ? "AFMT_U8" :
|
|
|
950 the_fmt == AFMT_S16_LE ? "AFMT_S16_LE" :
|
|
|
951 the_fmt == AFMT_S16_BE ? "AFMT_S16_BE" :
|
|
|
952 the_fmt == AFMT_S8 ? "AFMT_S8" :
|
|
|
953 the_fmt == AFMT_U16_LE ? "AFMT_U16_LE" :
|
|
|
954 the_fmt == AFMT_U16_BE ? "AFMT_U16_BE" :
|
|
|
955 the_fmt == AFMT_MPEG ? "AFMT_MPEG" :
|
|
|
956 "AFMT_???",
|
|
|
957 the_stereo == 2 ? "stereo" : "mono",
|
|
|
958 the_speed,
|
|
|
959 the_volume / 256, the_volume % 256); }
|
|
|
960 #endif
|
|
|
961
|
|
|
962 return(1);
|
|
|
963 }
|
|
|
964
|
|
|
965 /* XEmacs requires code both for playback of pre-loaded data and for playback
|
|
|
966 from a soundfile; we use one function for both cases */
|
|
|
967 static void linux_play_data_or_file(int fd,unsigned char *data,
|
|
|
968 int length,int volume)
|
|
|
969 {
|
|
|
970 size_t (*parsesndfile)(void **dayta,size_t *sz,void **outbuf);
|
|
|
971 size_t (*sndcnv)(void **dayta,size_t *sz,void **);
|
|
|
972 fmtType ffmt;
|
|
|
973 int fmt,speed,tracks;
|
|
|
974 unsigned char *pptr,*optr,*cptr,*sptr;
|
|
|
975 int wrtn,rrtn,crtn,prtn;
|
|
|
976
|
|
|
977 /* We need to read at least the header information before we can start
|
|
|
978 doing anything */
|
|
233
|
979 if (!data || length < HEADERSZ) {
|
|
0
|
980 if (fd < 0) return;
|
|
|
981 else {
|
|
124
|
982 length = read(fd,linuxplay_sndbuf,SNDBUFSZ);
|
|
0
|
983 if (length < HEADERSZ)
|
|
|
984 return;
|
|
124
|
985 data = linuxplay_sndbuf;
|
|
0
|
986 length = SNDBUFSZ; }
|
|
233
|
987 }
|
|
0
|
988
|
|
|
989 ffmt = analyze_format(data,&fmt,&speed,&tracks,&parsesndfile);
|
|
|
990
|
|
|
991 if (ffmt != fmtRaw && ffmt != fmtSunAudio && ffmt != fmtWave) {
|
|
|
992 warn("Unsupported file format (neither RAW, nor Sun/DECAudio, nor WAVE)");
|
|
|
993 return; }
|
|
|
994
|
|
|
995 /* The VoxWare-SDK discourages opening /dev/audio; opening /dev/dsp and
|
|
|
996 properly intializing it via ioctl() is prefered */
|
|
282
|
997 if ((audio_fd=open(audio_dev,
|
|
0
|
998 (O_WRONLY|O_NDELAY),0)) < 0) {
|
|
|
999 perror(audio_dev);
|
|
|
1000 if (mix_fd > 0 && mix_fd != audio_fd) { close(mix_fd); mix_fd = -1; }
|
|
|
1001 return; }
|
|
|
1002
|
|
|
1003 /* The VoxWare-SDK discourages direct manipulation of the mixer device as
|
|
|
1004 this could lead to problems, when multiple sound cards are installed */
|
|
|
1005 mix_fd = audio_fd;
|
|
|
1006
|
|
98
|
1007 sighup_handler = signal(SIGHUP, sighandler);
|
|
|
1008 sigint_handler = signal(SIGINT, sighandler);
|
|
0
|
1009
|
|
|
1010 if (!audio_init(mix_fd,audio_fd,fmt,speed,tracks,&volume,&sndcnv))
|
|
|
1011 goto END_OF_PLAY;
|
|
|
1012 audio_vol = volume;
|
|
|
1013
|
|
|
1014 /* Initialize global parser state information to zero */
|
|
|
1015 memset(&parsestate,0,sizeof(parsestate));
|
|
|
1016
|
|
|
1017 /* Mainloop: read a block of data, parse its contents, perform all
|
|
110
|
1018 the necessary conversions and output it to the sound
|
|
0
|
1019 device; repeat until all data has been processed */
|
|
|
1020 rrtn = length;
|
|
|
1021 do {
|
|
272
|
1022 for (pptr = data; (prtn = parsesndfile((void **)&pptr,(size_t *)&rrtn,
|
|
0
|
1023 (void **)&optr)) > 0; )
|
|
272
|
1024 for (cptr = optr; (crtn = sndcnv((void **)&cptr,(size_t *) &prtn,
|
|
0
|
1025 (void **)&sptr)) > 0; ) {
|
|
|
1026 for (;;) {
|
|
|
1027 if ((wrtn = write(audio_fd,sptr,crtn)) < 0) {
|
|
|
1028 perror("write"); goto END_OF_PLAY; }
|
|
|
1029 else if (wrtn) break;
|
|
|
1030 else if (ioctl(audio_fd,SNDCTL_DSP_SYNC,NULL) < 0) {
|
|
|
1031 perror("SNDCTL_DSP_SYNC"); goto END_OF_PLAY; } }
|
|
|
1032 if (wrtn != crtn) {
|
|
|
1033 char buf[255];
|
|
|
1034 sprintf(buf,"play: crtn = %d, wrtn = %d",crtn,wrtn);
|
|
|
1035 warn(buf);
|
|
|
1036 goto END_OF_PLAY; } }
|
|
|
1037 if (fd >= 0) {
|
|
124
|
1038 if ((rrtn = read(fd,linuxplay_sndbuf,SNDBUFSZ)) < 0) {
|
|
0
|
1039 perror("read"); goto END_OF_PLAY; } }
|
|
|
1040 else
|
|
|
1041 break;
|
|
|
1042 } while (rrtn > 0);
|
|
|
1043
|
|
|
1044 /* Verify that we could fully parse the entire soundfile; this is needed
|
|
|
1045 only for files in WAVE format */
|
|
|
1046 if (ffmt == fmtWave && parsestate.wave.state != wvOutOfBlock &&
|
|
|
1047 parsestate.wave.state != wvFatal)
|
|
|
1048 warn("Unexpected end of WAVE file");
|
|
|
1049
|
|
|
1050 END_OF_PLAY:
|
|
|
1051 /* Now cleanup all used resources */
|
|
|
1052
|
|
|
1053 ioctl(audio_fd,SNDCTL_DSP_SYNC,NULL);
|
|
|
1054 ioctl(audio_fd,SNDCTL_DSP_RESET,NULL);
|
|
|
1055
|
|
|
1056 signal(SIGHUP,sighup_handler);
|
|
|
1057 signal(SIGINT,sigint_handler);
|
|
|
1058
|
|
|
1059 if (mix_fd > 0) {
|
|
|
1060 if (audio_vol >= 0) {
|
|
|
1061 ioctl(mix_fd,SOUND_MIXER_WRITE_PCM,&audio_vol);
|
|
|
1062 audio_vol = -1; }
|
|
|
1063 if (mix_fd != audio_fd)
|
|
|
1064 close(mix_fd);
|
|
|
1065 mix_fd = -1; }
|
|
|
1066
|
|
|
1067 close(audio_fd);
|
|
|
1068 audio_fd = -1;
|
|
|
1069
|
|
|
1070 return;
|
|
|
1071 }
|
|
|
1072
|
|
|
1073 /* Call "linux_play_data_or_file" with the appropriate parameters for
|
|
|
1074 playing a soundfile */
|
|
|
1075 void play_sound_file (char *sound_file, int volume);
|
|
|
1076 void play_sound_file (char *sound_file, int volume)
|
|
|
1077 {
|
|
|
1078 int fd;
|
|
|
1079
|
|
|
1080 if ((fd=open(sound_file,O_RDONLY,0)) < 0) {
|
|
|
1081 perror(sound_file);
|
|
|
1082 return; }
|
|
|
1083 linux_play_data_or_file(fd,NULL,0,volume);
|
|
|
1084 close(fd);
|
|
|
1085 return;
|
|
|
1086 }
|
|
|
1087
|
|
|
1088 /* Call "linux_play_data_or_file" with the appropriate parameters for
|
|
|
1089 playing pre-loaded data */
|
|
|
1090 void play_sound_data (unsigned char *data, int length, int volume);
|
|
|
1091 void play_sound_data (unsigned char *data, int length, int volume)
|
|
|
1092 {
|
|
|
1093 linux_play_data_or_file(-1,data,length,volume);
|
|
|
1094 return;
|
|
|
1095 }
|
