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