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428
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1 /* play.c - play a sound file on the speaker
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2 **
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3 ** Copyright (C) 1989 by Jef Poskanzer.
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4 **
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5 ** Modified 24-May-91 by Jamie Zawinski (for Lucid Emacs).
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6 ** Modified 17-Dec-92 by Jamie Zawinski (largely rewritten for SunOS 4.1.3).
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7 **
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8 ** Permission to use, copy, modify, and distribute this software and its
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9 ** documentation for any purpose and without fee is hereby granted, provided
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10 ** that the above copyright notice appear in all copies and that both that
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11 ** copyright notice and this permission notice appear in supporting
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12 ** documentation. This software is provided "as is" without express or
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13 ** implied warranty.
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14 */
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15
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16 /* Synched up with: Not in FSF. */
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17
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18 #ifdef HAVE_CONFIG_H
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19 #include <config.h>
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20 #endif
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21
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22 #if __STDC__ || defined(STDC_HEADERS)
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23 #include <stdlib.h>
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24 #include <unistd.h>
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25 #include <fcntl.h> /* for open() */
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26 #endif
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27
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28 #include <stdio.h>
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29 #include <string.h>
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30 #ifndef emacs
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31 #include <sys/signal.h>
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32 #endif
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33 #include <sys/fcntl.h>
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34 #include <sys/file.h>
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35
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36 /* libaudio.h includes a header which defines CONST. We temporarily
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37 undefine it in order to eliminate a compiler warning. Yes, this is
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38 a gross hack. */
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39 #undef CONST
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40 #include <multimedia/libaudio.h>
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41 #include <multimedia/audio_device.h>
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42 #undef CONST
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43 #define CONST const
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44
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45 #ifdef emacs
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46 # include <config.h>
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47 # include "lisp.h"
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48 # include "sysdep.h"
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49 # include <errno.h>
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50 #include "syssignal.h"
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51 # define perror(string) \
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52 message("audio: %s, %s ", string, strerror (errno))
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53 # define warn(str) message ("audio: %s ", GETTEXT (str))
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54 #else /* !emacs */
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55 # define warn(str) fprintf (stderr, "%s\n", (str))
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56 #endif /* emacs */
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57
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58 static SIGTYPE (*sighup_handler) (int sig);
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59 static SIGTYPE (*sigint_handler) (int sig);
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60 static SIGTYPE sighandler (int sig);
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61
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62 static int audio_fd;
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63
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64 #define audio_open() open ("/dev/audio", (O_WRONLY | O_NONBLOCK), 0)
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65
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66 static int reset_volume_p, reset_device_p;
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67 static double old_volume;
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68 static Audio_hdr dev_hdr;
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69
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70 void play_sound_file (char *name, int volume);
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71 void play_sound_data (unsigned char *data, int length, int volume);
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72
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73 static int
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74 init_device (int volume, unsigned char *data, int fd,
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75 unsigned int *header_length)
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76 {
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77 #ifdef SUNOS4_0_3
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78 if (header_length) *header_length = 0;
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79 return 0;
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80 #else
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81 Audio_hdr file_hdr;
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82
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83 reset_volume_p = 0;
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84 reset_device_p = 0;
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85
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86 if (data && fd) abort (); /* one or the other */
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87
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88 if (AUDIO_SUCCESS != audio_get_play_config (audio_fd, &dev_hdr))
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89 {
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90 perror ("Not a valid audio device");
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91 return 1;
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92 }
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93
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94 if (AUDIO_SUCCESS != (data
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95 ? audio_decode_filehdr (data, &file_hdr, header_length)
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96 : audio_read_filehdr (fd, &file_hdr, 0, 0)))
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97 {
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98 if (data)
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99 perror ("invalid audio data");
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100 else
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101 perror ("invalid audio file");
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102 return 1;
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103 }
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104
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105 audio_flush_play (audio_fd);
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106
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107 if (0 != audio_cmp_hdr (&dev_hdr, &file_hdr))
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108 {
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109 Audio_hdr new_hdr;
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110 new_hdr = file_hdr;
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111 reset_device_p = 1;
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112 if (AUDIO_SUCCESS != audio_set_play_config (audio_fd, &new_hdr))
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113 {
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114 char buf1 [100], buf2 [100], buf3 [250];
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115 audio_enc_to_str (&file_hdr, buf1);
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116 audio_enc_to_str (&new_hdr, buf2);
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117 sprintf (buf3, "wanted %s, got %s", buf1, buf2);
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118 warn (buf3);
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119 return 1;
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120 }
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121 }
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122
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123 if (volume < 0 || volume > 100)
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124 {
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125 char buf [255];
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126 sprintf (buf, "volume must be between 0 and 100 (not %d)", volume);
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127 warn (buf);
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128 return 1;
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129 }
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130 {
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131 /* set the volume; scale it to 0.0 - 1.0 */
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132 double V = (volume / 100.0);
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133 audio_get_play_gain (audio_fd, &old_volume);
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134 reset_volume_p = 1;
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135 audio_set_play_gain (audio_fd, &V);
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136 }
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137
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138 return 0;
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139 #endif
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140 }
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141
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142
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143 static void
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144 reset_device (int wait_p)
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145 {
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146 if (wait_p)
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147 audio_drain (audio_fd, 1);
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148 else
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149 audio_flush_play (audio_fd);
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150 if (reset_device_p)
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151 audio_set_play_config (audio_fd, &dev_hdr);
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152 if (reset_volume_p)
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153 audio_set_play_gain (audio_fd, &old_volume);
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154 }
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155
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156
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157 void
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158 play_sound_file (char *sound_file, int volume)
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159 {
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160 int rrtn, wrtn;
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161 unsigned char buf [255];
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162 int file_fd;
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163
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164 audio_fd = audio_open ();
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165
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166 if (audio_fd < 0)
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167 {
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168 perror ("open /dev/audio");
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169 return;
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170 }
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171
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172 /* where to find the proto for signal()... */
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173 sighup_handler = (SIGTYPE (*) (int)) signal (SIGHUP, sighandler);
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174 sigint_handler = (SIGTYPE (*) (int)) signal (SIGINT, sighandler);
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175
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176 file_fd = open (sound_file, O_RDONLY, 0);
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177 if (file_fd < 0)
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178 {
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179 perror (sound_file);
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180 goto END_OF_PLAY;
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181 }
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182
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183 if (init_device (volume, (unsigned char *) 0, file_fd, (unsigned int *) 0))
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184 goto END_OF_PLAY;
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185
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186 while (1)
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187 {
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188 rrtn = read (file_fd, (char *) buf, sizeof (buf));
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189 if (rrtn < 0)
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190 {
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191 perror ("read");
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192 goto END_OF_PLAY;
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193 }
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194 if (rrtn == 0)
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195 break;
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196
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197 while (1)
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198 {
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199 wrtn = write (audio_fd, (char *) buf, rrtn);
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200 if (wrtn < 0)
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201 {
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202 perror ("write");
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203 goto END_OF_PLAY;
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204 }
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205 if (wrtn != 0)
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206 break;
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207
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208 if (AUDIO_ERR_INTERRUPTED == audio_drain (audio_fd, 1))
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209 goto END_OF_PLAY;
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210 }
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211 if (wrtn != rrtn)
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212 {
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213 char warn_buf [255];
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214 sprintf (warn_buf, "play: rrtn = %d, wrtn = %d", rrtn, wrtn);
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215 warn (warn_buf);
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216 goto END_OF_PLAY;
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217 }
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218 }
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219
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220 END_OF_PLAY:
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221
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222 if (file_fd > 0)
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223 close (file_fd);
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224
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225 if (audio_fd > 0)
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226 {
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227 reset_device (1);
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228 close (audio_fd);
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229 }
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230
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231 signal (SIGHUP, sighup_handler);
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232 signal (SIGINT, sigint_handler);
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233 }
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234
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235
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236 void
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237 play_sound_data (unsigned char *data, int length, int volume)
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238 {
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239 int wrtn, start = 0;
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240 unsigned int ilen;
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241
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242 audio_fd = -1;
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243
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244 if (length == 0) return;
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245
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246 /* this is just to get a better error message */
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247 if (strncmp (".snd\0", (char *) data, 4))
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248 {
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249 warn ("Not valid audio data (bad magic number)");
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250 goto END_OF_PLAY;
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251 }
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252 if (length <= sizeof (Audio_hdr))
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253 {
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254 warn ("Not valid audio data (too short)");
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255 goto END_OF_PLAY;
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256 }
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257
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258 audio_fd = audio_open ();
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259 if (audio_fd < 0)
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260 {
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261 perror ("open /dev/audio");
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262 return;
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263 }
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264
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265 /* where to find the proto for signal()... */
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266 sighup_handler = (SIGTYPE (*) (int)) signal (SIGHUP, sighandler);
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267 sigint_handler = (SIGTYPE (*) (int)) signal (SIGINT, sighandler);
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268
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269 if (init_device (volume, data, 0, &ilen))
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270 goto END_OF_PLAY;
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271
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272 data += (ilen<<2);
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273 length -= (ilen<<2);
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274 if (length <= 1)
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275 goto END_OF_PLAY;
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276
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277 while (1)
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278 {
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279 wrtn = write (audio_fd, (char *) (data+start), length-start);
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280 if (wrtn < 0)
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281 {
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282 perror ("write");
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283 goto END_OF_PLAY;
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284 }
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285 if (wrtn != 0)
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286 {
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287 start += wrtn;
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288 break;
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289 }
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290 if (AUDIO_ERR_INTERRUPTED == audio_drain (audio_fd, 1))
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291 goto END_OF_PLAY;
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292 }
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293 if (wrtn != length)
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294 {
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295 char buf [255];
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296 sprintf (buf, "play: rrtn = %d, wrtn = %d", length, wrtn);
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297 warn (buf);
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298 goto END_OF_PLAY;
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299 }
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300
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301 END_OF_PLAY:
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302
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303 if (audio_fd > 0)
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304 {
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305 reset_device (1);
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306 close (audio_fd);
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307 }
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308
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309 signal (SIGHUP, sighup_handler);
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310 signal (SIGINT, sigint_handler);
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311 }
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312
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313 /* #### sigcontext doesn't exist in Solaris. This should be updated
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314 to be correct for Solaris. */
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315 static void
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316 sighandler (int sig)
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317 {
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318 if (audio_fd > 0)
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319 {
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320 reset_device (0);
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321 close (audio_fd);
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322 }
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323 if (sig == SIGHUP && sighup_handler)
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324 sighup_handler (sig);
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325 else if (sig == SIGINT && sigint_handler)
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326 sigint_handler (sig);
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327 else
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328 exit (1);
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329 }
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