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0
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1 /* nas.c --- XEmacs support for the Network Audio System server.
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2 *
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3 * Author: Richard Caley <R.Caley@ed.ac.uk>
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4 *
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5 * Copyright 1994 Free Software Foundation, Inc.
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6 * Copyright 1993 Network Computing Devices, Inc.
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7 *
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8 * Permission to use, copy, modify, distribute, and sell this software and
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9 * its documentation for any purpose is hereby granted without fee, 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, and that the name Network Computing Devices, Inc. not be
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13 * used in advertising or publicity pertaining to distribution of this
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14 * software without specific, written prior permission.
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15 *
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16 * THIS SOFTWARE IS PROVIDED 'AS-IS'. NETWORK COMPUTING DEVICES, INC.,
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17 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT
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18 * LIMITATION ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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19 * PARTICULAR PURPOSE, OR NONINFRINGEMENT. IN NO EVENT SHALL NETWORK
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20 * COMPUTING DEVICES, INC., BE LIABLE FOR ANY DAMAGES WHATSOEVER, INCLUDING
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21 * SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING LOSS OF USE, DATA,
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22 * OR PROFITS, EVEN IF ADVISED OF THE POSSIBILITY THEREOF, AND REGARDLESS OF
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23 * WHETHER IN AN ACTION IN CONTRACT, TORT OR NEGLIGENCE, ARISING OUT OF OR IN
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24 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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25 */
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26
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27 /* Synched up with: Not in FSF. */
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28
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29 /* There are four compile-time options.
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30 *
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31 * XTOOLKIT This will be part of an Xt program.
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32 *
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33 * XTEVENTS The playing will be supervised asynchronously by the Xt event
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34 * loop. If not set, playing will be completed within the call
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35 * to play_file etc.
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36 *
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37 * ROBUST_PLAY Causes errors in nas to be caught. This means that the
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38 * program will attempt not to die if the nas server does.
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39 *
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40 * CACHE_SOUNDS Causes the sounds to be played in buckets in the NAS
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41 * server. They are named by their comment field, or if that is
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42 * empty by the filename, or for play_sound_data by a name made up
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43 * from the sample itself.
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44 */
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45
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46 /* CHANGES:
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47 * 10/8/94, rjc Changed names from netaudio to nas
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48 * Added back asynchronous play if nas library has
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49 * correct error facilities.
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50 * 4/11/94, rjc Added wait_for_sounds to be called when user wants to
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51 * be sure all play has finished.
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375
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52 * 1998-10-01 rlt Added support for WAVE files.
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0
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53 */
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54
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272
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55 #ifdef emacs
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56 #include <config.h>
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57 #include "lisp.h"
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380
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58 #include "sysdep.h"
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59 #include "syssignal.h"
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272
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60 #endif
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61
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380
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62 #include <stdlib.h>
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63 #include <stdarg.h>
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64 #include <string.h>
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65 #include <stdio.h>
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0
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66
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16
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67 #ifdef HAVE_UNISTD_H
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68 #include <unistd.h>
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0
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69 #endif
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70
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71
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272
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72 #undef LITTLE_ENDIAN
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73 #undef BIG_ENDIAN
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0
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74 #include <audio/audiolib.h>
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75 #include <audio/soundlib.h>
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76 #include <audio/snd.h>
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375
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77 #include <audio/wave.h>
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0
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78 #include <audio/fileutil.h>
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79
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80 #ifdef emacs
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81
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82 # define XTOOLKIT
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83 # define XTEVENTS
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84 # define ROBUST_PLAY
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85 # define CACHE_SOUNDS
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86
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87 /*
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88 * For old NAS libraries, force playing to be synchronous
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89 * and declare the long jump point locally.
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90 */
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91
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92 # if defined (NAS_NO_ERROR_JUMP)
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93
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94 # undef XTEVENTS
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95
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96 # include <setjmp.h>
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97 jmp_buf AuXtErrorJump;
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98 # endif
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99
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100 /* The GETTEXT is correct. --ben */
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101 # define warn(str) warn_when_safe (Qnas, Qwarning, "nas: %s ", GETTEXT (str))
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102
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103 # define play_sound_file nas_play_sound_file
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104 # define play_sound_data nas_play_sound_data
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105 # define wait_for_sounds nas_wait_for_sounds
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106 # define init_play nas_init_play
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107 # define close_down_play nas_close_down_play
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108
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109 #else /* !emacs */
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110 # define warn(str) fprintf (stderr, "%s\n", (str))
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111 # define CONST const
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112 #endif /* emacs */
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113
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114 #ifdef XTOOLKIT
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115 # include <X11/Intrinsic.h>
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116 # include <audio/Xtutil.h>
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117 #endif
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118
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119 #if defined (ROBUST_PLAY)
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120 static AuBool CatchIoErrorAndJump (AuServer *aud);
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121 static AuBool CatchErrorAndJump (AuServer *aud, AuErrorEvent *event);
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122 SIGTYPE sigpipe_handle (int signo);
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123 #endif
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124
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125 extern Lisp_Object Vsynchronous_sounds;
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126
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127 static Sound SoundOpenDataForReading (unsigned char *data, int length);
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128
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129 static AuServer *aud;
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130
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131 /* count of sounds currently being played. */
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132 static int sounds_in_play;
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133
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134
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135 #ifdef XTOOLKIT
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136 static Display *aud_server;
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137 static XtInputId input_id;
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138 #else
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139 static char *aud_server;
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140 #endif /* XTOOLKIT */
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141
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142 char *
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143 init_play (
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144 #ifdef XTOOLKIT
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145 Display *display
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146 #else
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147 char *server
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148 #endif
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149 )
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150 {
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151 char *err_message;
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152 SIGTYPE (*old_sigpipe) ();
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153
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154 #ifdef XTOOLKIT
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155 char * server = DisplayString (display);
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156 XtAppContext app_context = XtDisplayToApplicationContext (display);
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157
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158 aud_server = display;
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159 #else
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160
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161 aud_server = server;
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162 #endif
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163
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164 #ifdef ROBUST_PLAY
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165 old_sigpipe = signal (SIGPIPE, sigpipe_handle);
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166 if (setjmp (AuXtErrorJump))
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167 {
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168 signal (SIGPIPE, old_sigpipe);
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169 #ifdef emacs
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170 start_interrupts ();
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171 #endif
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172 return "error in NAS";
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173 }
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174 #endif
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175
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176 #if defined (ROBUST_PLAY) && !defined (NAS_NO_ERROR_JUMP)
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177 AuDefaultIOErrorHandler = CatchIoErrorAndJump;
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178 AuDefaultErrorHandler = CatchErrorAndJump;
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179 #endif
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180
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181 #ifdef emacs
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182 stop_interrupts ();
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183 #endif
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184 aud = AuOpenServer (server, 0, NULL, 0, NULL, &err_message);
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185 #ifdef emacs
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186 start_interrupts ();
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187 #endif
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188 if (!aud)
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189 {
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190 #ifdef ROBUST_PLAY
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191 signal (SIGPIPE, old_sigpipe);
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192 #endif
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193 if (err_message == NULL)
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194 return "Can't connect to audio server";
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195 else
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196 return err_message;
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197 }
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198
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199 #if defined (ROBUST_PLAY)
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200 # if defined (NAS_NO_ERROR_JUMP)
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201 aud->funcs.ioerror_handler = CatchIoErrorAndJump;
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202 aud->funcs.error_handler = CatchErrorAndJump;
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203 # else /* !NAS_NO_ERROR_JUMP */
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204 AuDefaultIOErrorHandler = NULL;
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205 AuDefaultErrorHandler = NULL;
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206 # endif
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207 #endif
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208
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209 #ifdef XTEVENTS
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210 input_id = AuXtAppAddAudioHandler (app_context, aud);
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211 #endif
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212
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213 #ifdef CACHE_SOUNDS
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214 AuSetCloseDownMode (aud, AuCloseDownRetainPermanent, NULL);
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215 #endif
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216
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217 #ifdef ROBUST_PLAY
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218 signal (SIGPIPE, old_sigpipe);
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219 #endif
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220
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221 sounds_in_play = 0;
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222
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223 return NULL;
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224 }
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225
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226 void
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227 close_down_play (void)
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228
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229 {
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230 AuCloseServer (aud);
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231 warn ("disconnected from audio server");
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232 }
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233
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234 /********************************************************************\
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235 * *
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236 * Callback which is run when the sound finishes playing. *
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237 * *
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238 \********************************************************************/
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239
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240 static void
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241 doneCB (AuServer *aud,
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242 AuEventHandlerRec *handler,
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243 AuEvent *ev,
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244 AuPointer data)
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245 {
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246 int *in_play_p = (int *) data;
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247
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248 (*in_play_p) --;
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249 }
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250
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251 #ifdef CACHE_SOUNDS
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252
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253 /********************************************************************\
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254 * *
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255 * Play a sound by playing the relevant bucket, if any or *
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256 * downloading it if not. *
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257 * *
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258 \********************************************************************/
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259
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260 static void
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261 do_caching_play (Sound s,
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262 int volume,
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263 unsigned char *buf)
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264
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265 {
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266 AuBucketAttributes *list, b;
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267 AuBucketID id;
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268 int n;
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269
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270 AuSetString (AuBucketDescription (&b),
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271 AuStringLatin1, strlen (SoundComment (s)), SoundComment (s));
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272
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273 list = AuListBuckets (aud, AuCompCommonDescriptionMask, &b, &n, NULL);
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274
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275 if (list == NULL)
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276 {
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277 unsigned char *my_buf;
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278
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279 if (buf==NULL)
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280 {
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281 if ((my_buf=malloc (SoundNumBytes (s)))==NULL)
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282 {
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283 return;
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284 }
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285
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286 if (SoundReadFile (my_buf, SoundNumBytes (s), s) != SoundNumBytes (s))
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287 {
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288 free (my_buf);
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289 return;
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290 }
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291 }
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292 else
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293 my_buf=buf;
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294
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295 id = AuSoundCreateBucketFromData (aud,
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296 s,
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297 my_buf,
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298 AuAccessAllMasks,
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299 NULL,
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300 NULL);
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301 if (buf == NULL)
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302 free (my_buf);
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303 }
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304 else /* found cached sound */
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305 {
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306 id = AuBucketIdentifier (list);
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307 AuFreeBucketAttributes (aud, n, list);
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308 }
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309
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310 sounds_in_play++;
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311
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312 AuSoundPlayFromBucket (aud,
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313 id,
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314 AuNone,
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315 AuFixedPointFromFraction (volume, 100),
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316 doneCB, (AuPointer) &sounds_in_play,
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317 1,
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318 NULL, NULL,
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319 NULL, NULL);
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320
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321 }
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322 #endif /* CACHE_SOUNDS */
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323
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324
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325 void
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326 wait_for_sounds (void)
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327
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328 {
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329 AuEvent ev;
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330
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331 while (sounds_in_play>0)
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332 {
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333 AuNextEvent (aud, AuTrue, &ev);
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334 AuDispatchEvent (aud, &ev);
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335 }
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336 }
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337
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338 int
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339 play_sound_file (char *sound_file,
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340 int volume)
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341 {
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342 SIGTYPE (*old_sigpipe) ();
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343
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344 #ifdef ROBUST_PLAY
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345 old_sigpipe=signal (SIGPIPE, sigpipe_handle);
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346 if (setjmp (AuXtErrorJump))
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347 {
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348 signal (SIGPIPE, old_sigpipe);
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349 return 0;
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350 }
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351 #endif
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352
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263
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353 if (aud==NULL) {
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0
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354 if (aud_server != NULL)
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355 {
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356 char *m;
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357 /* attempt to reconect */
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358 if ((m=init_play (aud_server))!= NULL)
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359 {
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360
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361 #ifdef ROBUST_PLAY
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362 signal (SIGPIPE, old_sigpipe);
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363 #endif
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364 return 0;
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365 }
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366 }
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367 else
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368 {
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369 warn ("Attempt to play with no audio init\n");
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370 #ifdef ROBUST_PLAY
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371 signal (SIGPIPE, old_sigpipe);
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372 #endif
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373 return 0;
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374 }
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263
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375 }
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0
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376
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377 #ifndef CACHE_SOUNDS
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378 sounds_in_play++;
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379 AuSoundPlayFromFile (aud,
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380 sound_file,
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381 AuNone,
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382 AuFixedPointFromFraction (volume,100),
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383 doneCB, (AuPointer) &sounds_in_play,
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384 NULL,
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385 NULL,
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386 NULL,
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387 NULL);
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388 #else
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389 /* Cache the sounds in buckets on the server */
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390
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391 {
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392 Sound s;
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393
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394 if ((s = SoundOpenFileForReading (sound_file))==NULL)
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395 {
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396 #ifdef ROBUST_PLAY
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397 signal (SIGPIPE, old_sigpipe);
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398 #endif
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399 return 0;
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400 }
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401
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402 if (SoundComment (s) == NULL || SoundComment (s)[0] == '\0')
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403 {
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404 SoundComment (s) = FileCommentFromFilename (sound_file);
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405 }
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406
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407 do_caching_play (s, volume, NULL);
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408
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409 SoundCloseFile (s);
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410
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411 }
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412 #endif /* CACHE_SOUNDS */
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413
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414 #ifndef XTEVENTS
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415 wait_for_sounds ();
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416 #else
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417 if (!NILP (Vsynchronous_sounds))
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418 {
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419 wait_for_sounds ();
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420 }
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421 #endif
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422
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423 #ifdef ROBUST_PLAY
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424 signal (SIGPIPE, old_sigpipe);
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425 #endif
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426
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427 return 1;
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428 }
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429
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430 int
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431 play_sound_data (unsigned char *data,
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432 int length,
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433 int volume)
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434 {
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435 Sound s;
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436 int offset;
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437 SIGTYPE (*old_sigpipe) ();
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438
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439 #if !defined (XTEVENTS)
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440 AuEvent ev;
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441 #endif
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442
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443 #ifdef ROBUST_PLAY
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444 old_sigpipe = signal (SIGPIPE, sigpipe_handle);
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445 if (setjmp (AuXtErrorJump) !=0)
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446 {
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447 signal (SIGPIPE, old_sigpipe);
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448 return 0;
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449 }
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450 #endif
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451
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452
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263
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453 if (aud == NULL) {
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0
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454 if (aud_server != NULL)
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455 {
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456 char *m;
|
|
|
457 /* attempt to reconect */
|
|
|
458 if ((m = init_play (aud_server)) != NULL)
|
|
|
459 {
|
|
|
460 #ifdef ROBUST_PLAY
|
|
|
461 signal (SIGPIPE, old_sigpipe);
|
|
|
462 #endif
|
|
|
463 return 0;
|
|
|
464 }
|
|
|
465 }
|
|
|
466 else
|
|
|
467 {
|
|
|
468 warn ("Attempt to play with no audio init\n");
|
|
|
469 #ifdef ROBUST_PLAY
|
|
|
470 signal (SIGPIPE, old_sigpipe);
|
|
|
471 #endif
|
|
|
472 return 0;
|
|
|
473 }
|
|
263
|
474 }
|
|
0
|
475
|
|
|
476 if ((s=SoundOpenDataForReading (data, length))==NULL)
|
|
|
477 {
|
|
|
478 warn ("unknown sound type");
|
|
|
479 #ifdef ROBUST_PLAY
|
|
|
480 signal (SIGPIPE, old_sigpipe);
|
|
|
481 #endif
|
|
|
482 return 0;
|
|
|
483 }
|
|
|
484
|
|
|
485 if (SoundFileFormat (s) == SoundFileFormatSnd)
|
|
|
486 {
|
|
|
487 /* hack, hack */
|
|
|
488 offset = ((SndInfo *) (s->formatInfo))->h.dataOffset;
|
|
|
489 }
|
|
375
|
490 else if (SoundFileFormat (s) == SoundFileFormatWave)
|
|
|
491 {
|
|
|
492 offset = ((WaveInfo *) (s->formatInfo))->dataOffset;
|
|
|
493 }
|
|
0
|
494 else
|
|
|
495 {
|
|
375
|
496 warn ("only understand snd and wave files at the moment");
|
|
0
|
497 SoundCloseFile (s);
|
|
|
498 #ifdef ROBUST_PLAY
|
|
|
499 signal (SIGPIPE, old_sigpipe);
|
|
|
500 #endif
|
|
|
501 return 0;
|
|
|
502 }
|
|
|
503
|
|
|
504 #ifndef CACHE_SOUNDS
|
|
|
505 sounds_in_play++;
|
|
|
506 AuSoundPlayFromData (aud,
|
|
|
507 s,
|
|
|
508 data+offset,
|
|
|
509 AuNone,
|
|
|
510 AuFixedPointFromFraction (volume,100),
|
|
|
511 doneCB, (AuPointer) &sounds_in_play,
|
|
|
512 NULL,
|
|
|
513 NULL,
|
|
|
514 NULL,
|
|
|
515 NULL);
|
|
|
516 #else
|
|
|
517 /* Cache the sounds in buckets on the server */
|
|
|
518
|
|
|
519 {
|
|
|
520 do_caching_play (s, volume, data+offset);
|
|
|
521 }
|
|
|
522 #endif /* CACHE_SOUNDS */
|
|
|
523
|
|
|
524
|
|
|
525 #ifndef XTEVENTS
|
|
|
526 wait_for_sounds ();
|
|
|
527 #else
|
|
|
528 if (!NILP (Vsynchronous_sounds))
|
|
|
529 {
|
|
|
530 wait_for_sounds ();
|
|
|
531 }
|
|
|
532 #endif
|
|
|
533
|
|
|
534 SoundCloseFile (s);
|
|
|
535
|
|
|
536 #ifdef ROBUST_PLAY
|
|
|
537 signal (SIGPIPE, old_sigpipe);
|
|
|
538 #endif
|
|
|
539
|
|
|
540 return 1;
|
|
|
541 }
|
|
|
542
|
|
|
543 #if defined (ROBUST_PLAY)
|
|
|
544
|
|
|
545 /********************************************************************\
|
|
|
546 * *
|
|
|
547 * Code to protect the client from server shutdowns. *
|
|
|
548 * *
|
|
|
549 * This is unbelievably horrible. *
|
|
|
550 * *
|
|
|
551 \********************************************************************/
|
|
|
552
|
|
|
553 static AuBool
|
|
|
554 CatchIoErrorAndJump (AuServer *old_aud)
|
|
|
555 {
|
|
|
556 if (old_aud)
|
|
|
557 warn ("Audio Server connection broken");
|
|
|
558 else
|
|
|
559 warn ("Audio Server connection broken because of signal");
|
|
|
560
|
|
|
561 #ifdef XTEVENTS
|
|
|
562 #ifdef XTOOLKIT
|
|
|
563 {
|
|
|
564 AuXtAppRemoveAudioHandler (aud, input_id);
|
|
|
565 }
|
|
|
566 #endif
|
|
|
567
|
|
|
568 if (aud)
|
|
|
569 AuCloseServer (aud);
|
|
|
570 aud = NULL;
|
|
|
571 sounds_in_play = 0;
|
|
|
572
|
|
|
573 longjmp (AuXtErrorJump, 1);
|
|
|
574
|
|
|
575 #else /* not XTEVENTS */
|
|
|
576
|
|
|
577 if (aud)
|
|
|
578 AuCloseServer (aud);
|
|
|
579 aud = NULL;
|
|
|
580 sounds_in_play = 0;
|
|
|
581 longjmp (AuXtErrorJump, 1);
|
|
|
582
|
|
|
583 #endif /* XTEVENTS */
|
|
375
|
584 return 0;
|
|
0
|
585 }
|
|
|
586
|
|
|
587 SIGTYPE
|
|
|
588 sigpipe_handle (int signo)
|
|
|
589 {
|
|
|
590 CatchIoErrorAndJump (NULL);
|
|
|
591 }
|
|
|
592
|
|
|
593 static AuBool
|
|
|
594 CatchErrorAndJump (AuServer *old_aud,
|
|
|
595 AuErrorEvent *event)
|
|
|
596 {
|
|
|
597 return CatchIoErrorAndJump (old_aud);
|
|
|
598 }
|
|
|
599
|
|
|
600 #endif /* ROBUST_PLAY */
|
|
|
601
|
|
|
602 /********************************************************************\
|
|
|
603 * *
|
|
|
604 * This code is here because the nas Sound library doesn't *
|
|
|
605 * support playing from a file buffered in memory. It's a fairly *
|
|
|
606 * direct translation of the file-based equivalent. *
|
|
|
607 * *
|
|
|
608 * Since we don't have a filename, samples with no comment field *
|
|
|
609 * are named by a section of their content. *
|
|
|
610 * *
|
|
|
611 \********************************************************************/
|
|
|
612
|
|
|
613 /* Create a name from the sound. */
|
|
|
614
|
|
|
615 static char *
|
|
|
616 NameFromData (CONST unsigned char *buf,
|
|
|
617 int len)
|
|
|
618
|
|
|
619 {
|
|
|
620 unsigned char name[9];
|
|
|
621 int i;
|
|
|
622 char *s;
|
|
|
623
|
|
|
624 buf+=len/2;
|
|
|
625 len -= len/2;
|
|
|
626
|
|
|
627 i=0;
|
|
|
628 while (i<8 && len >0)
|
|
|
629 {
|
|
|
630 while (*buf < 32 && len>0)
|
|
|
631 {
|
|
|
632 buf++;
|
|
|
633 len--;
|
|
|
634 }
|
|
|
635 name[i]= *buf;
|
|
|
636 i++;
|
|
|
637 buf++;
|
|
|
638 len--;
|
|
|
639 }
|
|
|
640
|
|
|
641 name[i]='\0';
|
|
|
642
|
|
|
643 if (i==8)
|
|
|
644 {
|
|
|
645 strcpy (s=malloc (10), name);
|
|
|
646 }
|
|
|
647 else
|
|
|
648 {
|
|
|
649 strcpy (s=malloc (15), "short sound");
|
|
|
650 }
|
|
|
651
|
|
|
652 return s;
|
|
|
653 }
|
|
|
654
|
|
|
655 /* Code to do a pseudo-open on a data buffer. Only for snd files at the
|
|
|
656 moment.
|
|
|
657 */
|
|
|
658
|
|
|
659 static SndInfo *
|
|
|
660 SndOpenDataForReading (CONST char *data,
|
|
|
661 int length)
|
|
|
662
|
|
|
663 {
|
|
|
664 SndInfo *si;
|
|
|
665 int size;
|
|
|
666
|
|
|
667 if (!(si = (SndInfo *) malloc (sizeof (SndInfo))))
|
|
|
668 return NULL;
|
|
|
669
|
|
|
670 si->comment = NULL;
|
|
|
671 si->writing = 0;
|
|
|
672
|
|
|
673 memcpy (&si->h, data, sizeof (SndHeader));
|
|
|
674
|
|
371
|
675 if (LITTLE_ENDIAN)
|
|
0
|
676 {
|
|
|
677 char n;
|
|
|
678
|
|
|
679 swapl (&si->h.magic, n);
|
|
|
680 swapl (&si->h.dataOffset, n);
|
|
|
681 swapl (&si->h.dataSize, n);
|
|
|
682 swapl (&si->h.format, n);
|
|
|
683 swapl (&si->h.sampleRate, n);
|
|
|
684 swapl (&si->h.tracks, n);
|
|
|
685 }
|
|
|
686
|
|
|
687 if (si->h.magic != SND_MAGIC_NUM)
|
|
|
688 {
|
|
|
689 free (si);
|
|
|
690 return NULL;
|
|
|
691 }
|
|
|
692
|
|
|
693 size = si->h.dataOffset - sizeof (SndHeader);
|
|
|
694
|
|
|
695 if (size)
|
|
|
696 {
|
|
|
697 if (!(si->comment = (char *) malloc (size + 1)))
|
|
|
698 {
|
|
|
699 free (si);
|
|
|
700 return NULL;
|
|
|
701 }
|
|
|
702
|
|
|
703 memcpy (si->comment, data+sizeof (SndHeader), size);
|
|
|
704
|
|
|
705 *(si->comment + size) = 0;
|
|
|
706 if (*si->comment == '\0')
|
|
|
707 si->comment =
|
|
|
708 NameFromData (data+si->h.dataOffset, length-si->h.dataOffset);
|
|
|
709 }
|
|
|
710 else
|
|
|
711 si->comment = NameFromData (data+si->h.dataOffset, length-si->h.dataOffset);
|
|
|
712
|
|
|
713 si->h.dataSize = length-si->h.dataOffset;
|
|
|
714
|
|
|
715 si->fp=NULL;
|
|
|
716
|
|
|
717 return si;
|
|
|
718 }
|
|
|
719
|
|
375
|
720 /* Stuff taken from wave.c from NAS. Just like snd files, NAS can't
|
|
|
721 read wave data from memory, so these functions do that for us. */
|
|
|
722
|
|
|
723 #define Err() { return NULL; }
|
|
|
724 #define readFourcc(_f) dread(_f, sizeof(RIFF_FOURCC), 1)
|
|
|
725 #define cmpID(_x, _y) \
|
|
|
726 strncmp((char *) (_x), (char *) (_y), sizeof(RIFF_FOURCC))
|
|
|
727 #define PAD2(_x) (((_x) + 1) & ~1)
|
|
|
728
|
|
|
729 /* These functions here are for faking file I/O from buffer. */
|
|
|
730
|
|
|
731 /* The "file" position */
|
|
|
732 static int file_posn;
|
|
|
733 /* The length of the "file" */
|
|
|
734 static int file_len;
|
|
|
735 /* The actual "file" data. */
|
|
|
736 CONST static char* file_data;
|
|
|
737
|
|
|
738 /* Like fopen, but for a buffer in memory */
|
|
|
739 static void
|
|
|
740 dopen(CONST char* data, int length)
|
|
|
741 {
|
|
|
742 file_data = data;
|
|
|
743 file_len = length;
|
|
|
744 file_posn = 0;
|
|
|
745 }
|
|
|
746
|
|
|
747 /* Like fread, but for a buffer in memory */
|
|
|
748 static int
|
|
|
749 dread(char* buf, int size, int nitems)
|
|
|
750 {
|
|
|
751 int nread;
|
|
|
752
|
|
|
753 nread = size * nitems;
|
|
|
754
|
|
|
755 if (file_posn + nread <= file_len)
|
|
|
756 {
|
|
|
757 memcpy(buf, file_data + file_posn, size * nitems);
|
|
|
758 file_posn += nread;
|
|
|
759 return nitems;
|
|
|
760 }
|
|
|
761 else
|
|
|
762 {
|
|
|
763 return EOF;
|
|
|
764 }
|
|
|
765 }
|
|
|
766
|
|
|
767 /* Like fgetc, but for a buffer in memory */
|
|
|
768 static int
|
|
|
769 dgetc()
|
|
|
770 {
|
|
|
771 int ch;
|
|
|
772
|
|
|
773 if (file_posn < file_len)
|
|
|
774 return file_data[file_posn++];
|
|
|
775 else
|
|
|
776 return -1;
|
|
|
777 }
|
|
|
778
|
|
|
779 /* Like fseek, but for a buffer in memory */
|
|
|
780 static int
|
|
|
781 dseek(long offset, int from)
|
|
|
782 {
|
|
|
783 if (from == 0)
|
|
|
784 file_posn = offset;
|
|
|
785 else if (from == 1)
|
|
|
786 file_posn += offset;
|
|
|
787 else if (from == 2)
|
|
|
788 file_posn = file_len + offset;
|
|
|
789
|
|
|
790 return 0;
|
|
|
791 }
|
|
|
792
|
|
|
793 /* Like ftell, but for a buffer in memory */
|
|
|
794 static int
|
|
|
795 dtell()
|
|
|
796 {
|
|
|
797 return file_posn;
|
|
|
798 }
|
|
|
799
|
|
|
800 /* Data buffer analogs for FileReadS and FileReadL in NAS. */
|
|
|
801
|
|
|
802 static unsigned short
|
|
|
803 DataReadS(int swapit)
|
|
|
804 {
|
|
|
805 unsigned short us;
|
|
|
806
|
|
|
807 dread(&us, 2, 1);
|
|
|
808 if (swapit)
|
|
|
809 us = FileSwapS(us);
|
|
|
810 return us;
|
|
|
811 }
|
|
|
812
|
|
|
813 static AuUint32
|
|
|
814 DataReadL(int swapit)
|
|
|
815 {
|
|
|
816 AuUint32 ul;
|
|
|
817
|
|
|
818 dread(&ul, 4, 1);
|
|
|
819 if (swapit)
|
|
|
820 ul = FileSwapL(ul);
|
|
|
821 return ul;
|
|
|
822 }
|
|
|
823
|
|
|
824 static int
|
|
|
825 readChunk(RiffChunk *c)
|
|
|
826 {
|
|
|
827 int status;
|
|
|
828 char n;
|
|
|
829
|
|
|
830 if ((status = dread(c, sizeof(RiffChunk), 1)))
|
|
|
831 if (BIG_ENDIAN)
|
|
|
832 swapl(&c->ckSize, n);
|
|
|
833
|
|
|
834 return status;
|
|
|
835 }
|
|
|
836
|
|
|
837 /* A very straight-forward translation of WaveOpenFileForReading to
|
|
|
838 read the wave data from a buffer in memory. */
|
|
|
839
|
|
|
840 static WaveInfo *
|
|
|
841 WaveOpenDataForReading(CONST char *data,
|
|
|
842 int length)
|
|
|
843 {
|
|
|
844 RiffChunk ck;
|
|
|
845 RIFF_FOURCC fourcc;
|
|
|
846 AuInt32 fileSize;
|
|
|
847 WaveInfo *wi;
|
|
|
848
|
|
|
849
|
|
|
850 if (!(wi = (WaveInfo *) malloc(sizeof(WaveInfo))))
|
|
|
851 return NULL;
|
|
|
852
|
|
|
853 wi->comment = NULL;
|
|
|
854 wi->dataOffset = wi->format = wi->writing = 0;
|
|
|
855
|
|
|
856 dopen(data, length);
|
|
|
857
|
|
|
858 if (!readChunk(&ck) ||
|
|
|
859 cmpID(&ck.ckID, RIFF_RiffID) ||
|
|
|
860 !readFourcc(&fourcc) ||
|
|
|
861 cmpID(&fourcc, RIFF_WaveID))
|
|
|
862 Err();
|
|
|
863
|
|
|
864 fileSize = PAD2(ck.ckSize) - sizeof(RIFF_FOURCC);
|
|
|
865
|
|
|
866 while (fileSize >= sizeof(RiffChunk))
|
|
|
867 {
|
|
|
868 if (!readChunk(&ck))
|
|
|
869 Err();
|
|
|
870
|
|
|
871 fileSize -= sizeof(RiffChunk) + PAD2(ck.ckSize);
|
|
|
872
|
|
|
873 /* LIST chunk */
|
|
|
874 if (!cmpID(&ck.ckID, RIFF_ListID))
|
|
|
875 {
|
|
|
876 if (!readFourcc(&fourcc))
|
|
|
877 Err();
|
|
|
878
|
|
|
879 /* INFO chunk */
|
|
|
880 if (!cmpID(&fourcc, RIFF_ListInfoID))
|
|
|
881 {
|
|
|
882 ck.ckSize -= sizeof(RIFF_FOURCC);
|
|
|
883
|
|
|
884 while (ck.ckSize)
|
|
|
885 {
|
|
|
886 RiffChunk c;
|
|
|
887
|
|
|
888 if (!readChunk(&c))
|
|
|
889 Err();
|
|
|
890
|
|
|
891 /* ICMT chunk */
|
|
|
892 if (!cmpID(&c.ckID, RIFF_InfoIcmtID))
|
|
|
893 {
|
|
|
894 if (!(wi->comment = (char *) malloc(c.ckSize)) ||
|
|
|
895 !dread(wi->comment, c.ckSize, 1))
|
|
|
896 Err();
|
|
|
897
|
|
|
898 if (c.ckSize & 1)
|
|
|
899 dgetc(); /* eat the pad byte */
|
|
|
900 }
|
|
|
901 else
|
|
|
902 /* skip unknown chunk */
|
|
|
903 dseek(PAD2(c.ckSize), 1);
|
|
|
904
|
|
|
905 ck.ckSize -= sizeof(RiffChunk) + PAD2(c.ckSize);
|
|
|
906 }
|
|
|
907 }
|
|
|
908 else
|
|
|
909 /* skip unknown chunk */
|
|
|
910 dseek(PAD2(ck.ckSize) - sizeof(RIFF_FOURCC), 1);
|
|
|
911 }
|
|
|
912 /* wave format chunk */
|
|
|
913 else if (!cmpID(&ck.ckID, RIFF_WaveFmtID) && !wi->format)
|
|
|
914 {
|
|
|
915 AuInt32 dummy;
|
|
|
916
|
|
|
917 wi->format = DataReadS(BIG_ENDIAN);
|
|
|
918 wi->channels = DataReadS(BIG_ENDIAN);
|
|
|
919 wi->sampleRate = DataReadL(BIG_ENDIAN);
|
|
|
920
|
|
|
921 /* we don't care about the next two fields */
|
|
|
922 dummy = DataReadL(BIG_ENDIAN);
|
|
|
923 dummy = DataReadS(BIG_ENDIAN);
|
|
|
924
|
|
|
925 if (wi->format != RIFF_WAVE_FORMAT_PCM)
|
|
|
926 Err();
|
|
|
927
|
|
|
928 wi->bitsPerSample = DataReadS(BIG_ENDIAN);
|
|
|
929
|
|
|
930 /* skip any other format specific fields */
|
|
|
931 dseek(PAD2(ck.ckSize - 16), 1);
|
|
|
932 }
|
|
|
933 /* wave data chunk */
|
|
|
934 else if (!cmpID(&ck.ckID, RIFF_WaveDataID) && !wi->dataOffset)
|
|
|
935 {
|
|
|
936 long endOfFile;
|
|
|
937
|
|
|
938 wi->dataOffset = dtell();
|
|
|
939 wi->dataSize = ck.ckSize;
|
|
|
940 dseek(0, 2);
|
|
|
941 endOfFile = dtell();
|
|
|
942
|
|
|
943 /* seek past the data */
|
|
|
944 if (dseek(wi->dataOffset + PAD2(ck.ckSize), 0) ||
|
|
|
945 dtell() > endOfFile)
|
|
|
946 {
|
|
|
947 /* the seek failed, assume the size is bogus */
|
|
|
948 dseek(0, 2);
|
|
|
949 wi->dataSize = dtell() - wi->dataOffset;
|
|
|
950 }
|
|
|
951
|
|
|
952 wi->dataOffset -= sizeof(long);
|
|
|
953 }
|
|
|
954 else
|
|
|
955 /* skip unknown chunk */
|
|
|
956 dseek(PAD2(ck.ckSize), 1);
|
|
|
957 }
|
|
|
958
|
|
|
959 if (!wi->dataOffset)
|
|
|
960 Err();
|
|
|
961
|
|
|
962 wi->numSamples = wi->dataSize / wi->channels / (wi->bitsPerSample >> 3);
|
|
|
963
|
|
|
964 if (!wi->comment)
|
|
|
965 wi->comment = NameFromData (data + wi->dataOffset,
|
|
|
966 length - wi->dataOffset);
|
|
|
967
|
|
|
968 wi->fp = NULL;
|
|
|
969
|
|
|
970 return wi;
|
|
|
971 }
|
|
|
972
|
|
|
973
|
|
0
|
974 static Sound
|
|
|
975 SoundOpenDataForReading (unsigned char *data,
|
|
|
976 int length)
|
|
|
977
|
|
|
978 {
|
|
|
979 Sound s;
|
|
|
980
|
|
|
981 if (!(s = (Sound) malloc (sizeof (SoundRec))))
|
|
|
982 return NULL;
|
|
|
983
|
|
375
|
984 if ((s->formatInfo = SndOpenDataForReading (data, length)) != NULL)
|
|
0
|
985 {
|
|
375
|
986 if (!(SoundFileInfo[SoundFileFormatSnd].toSound) (s))
|
|
|
987 {
|
|
|
988 SndCloseFile (s->formatInfo);
|
|
|
989 free (s);
|
|
|
990 return NULL;
|
|
|
991 }
|
|
0
|
992 }
|
|
375
|
993 else if ((s->formatInfo = WaveOpenDataForReading (data, length)) != NULL)
|
|
0
|
994 {
|
|
375
|
995 if (!(SoundFileInfo[SoundFileFormatWave].toSound) (s))
|
|
|
996 {
|
|
|
997 WaveCloseFile (s->formatInfo);
|
|
|
998 free (s);
|
|
|
999 return NULL;
|
|
|
1000 }
|
|
0
|
1001 }
|
|
|
1002
|
|
|
1003 return s;
|
|
|
1004 }
|
|
|
1005
|
