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428
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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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52 * 1998-10-01 rlt Added support for WAVE files.
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53 */
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54
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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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58 #include "sysdep.h"
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59 #include "syssignal.h"
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60 #endif
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61
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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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66
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67 #ifdef HAVE_UNISTD_H
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68 #include <unistd.h>
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69 #endif
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70
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71
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72 #undef LITTLE_ENDIAN
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73 #undef BIG_ENDIAN
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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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77 #include <audio/wave.h>
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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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432
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149 );
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150 char *
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151 init_play (
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152 #ifdef XTOOLKIT
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153 Display *display
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154 #else
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155 char *server
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156 #endif
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428
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157 )
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158 {
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159 char *err_message;
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432
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160 SIGTYPE (*old_sigpipe) (int);
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428
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161
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162 #ifdef XTOOLKIT
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163 char * server = DisplayString (display);
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164 XtAppContext app_context = XtDisplayToApplicationContext (display);
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165
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166 aud_server = display;
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167 #else
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168
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169 aud_server = server;
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170 #endif
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171
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172 #ifdef ROBUST_PLAY
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173 old_sigpipe = signal (SIGPIPE, sigpipe_handle);
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174 if (setjmp (AuXtErrorJump))
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175 {
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176 signal (SIGPIPE, old_sigpipe);
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177 #ifdef emacs
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178 start_interrupts ();
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179 #endif
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180 return "error in NAS";
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181 }
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182 #endif
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183
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184 #if defined (ROBUST_PLAY) && !defined (NAS_NO_ERROR_JUMP)
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185 AuDefaultIOErrorHandler = CatchIoErrorAndJump;
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186 AuDefaultErrorHandler = CatchErrorAndJump;
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187 #endif
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188
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189 #ifdef emacs
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190 stop_interrupts ();
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191 #endif
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192 aud = AuOpenServer (server, 0, NULL, 0, NULL, &err_message);
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193 #ifdef emacs
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194 start_interrupts ();
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195 #endif
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196 if (!aud)
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197 {
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198 #ifdef ROBUST_PLAY
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199 signal (SIGPIPE, old_sigpipe);
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200 #endif
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201 if (err_message == NULL)
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202 return "Can't connect to audio server";
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203 else
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204 return err_message;
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205 }
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206
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207 #if defined (ROBUST_PLAY)
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208 # if defined (NAS_NO_ERROR_JUMP)
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209 aud->funcs.ioerror_handler = CatchIoErrorAndJump;
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210 aud->funcs.error_handler = CatchErrorAndJump;
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211 # else /* !NAS_NO_ERROR_JUMP */
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212 AuDefaultIOErrorHandler = NULL;
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213 AuDefaultErrorHandler = NULL;
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214 # endif
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215 #endif
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216
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217 #ifdef XTEVENTS
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218 input_id = AuXtAppAddAudioHandler (app_context, aud);
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219 #endif
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220
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221 #ifdef CACHE_SOUNDS
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222 AuSetCloseDownMode (aud, AuCloseDownRetainPermanent, NULL);
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223 #endif
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224
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225 #ifdef ROBUST_PLAY
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226 signal (SIGPIPE, old_sigpipe);
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227 #endif
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228
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229 sounds_in_play = 0;
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230
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231 return NULL;
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232 }
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233
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432
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234 static void
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428
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235 close_down_play (void)
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236
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237 {
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238 AuCloseServer (aud);
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239 warn ("disconnected from audio server");
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240 }
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241
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242 /********************************************************************\
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243 * *
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244 * Callback which is run when the sound finishes playing. *
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245 * *
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246 \********************************************************************/
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247
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248 static void
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432
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249 doneCB (AuServer *auserver,
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428
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250 AuEventHandlerRec *handler,
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251 AuEvent *ev,
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252 AuPointer data)
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253 {
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254 int *in_play_p = (int *) data;
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255
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256 (*in_play_p) --;
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257 }
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258
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259 #ifdef CACHE_SOUNDS
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260
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261 /********************************************************************\
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262 * *
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263 * Play a sound by playing the relevant bucket, if any or *
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264 * downloading it if not. *
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265 * *
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266 \********************************************************************/
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267
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268 static void
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269 do_caching_play (Sound s,
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270 int volume,
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271 unsigned char *buf)
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272
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273 {
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274 AuBucketAttributes *list, b;
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275 AuBucketID id;
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276 int n;
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277
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278 AuSetString (AuBucketDescription (&b),
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279 AuStringLatin1, strlen (SoundComment (s)), SoundComment (s));
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280
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281 list = AuListBuckets (aud, AuCompCommonDescriptionMask, &b, &n, NULL);
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282
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283 if (list == NULL)
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284 {
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432
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285 AuPointer my_buf;
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428
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286
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287 if (buf==NULL)
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288 {
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432
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289 if ((my_buf= (AuPointer) malloc (SoundNumBytes (s)))==NULL)
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428
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290 {
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291 return;
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292 }
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293
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432
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294 if (SoundReadFile ((char *) my_buf, SoundNumBytes (s), s) != SoundNumBytes (s))
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428
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295 {
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296 free (my_buf);
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297 return;
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298 }
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299 }
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300 else
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432
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301 my_buf = (AuPointer) buf;
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428
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302
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303 id = AuSoundCreateBucketFromData (aud,
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304 s,
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305 my_buf,
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306 AuAccessAllMasks,
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307 NULL,
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308 NULL);
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309 if (buf == NULL)
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310 free (my_buf);
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311 }
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312 else /* found cached sound */
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313 {
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314 id = AuBucketIdentifier (list);
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315 AuFreeBucketAttributes (aud, n, list);
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316 }
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317
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318 sounds_in_play++;
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319
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320 AuSoundPlayFromBucket (aud,
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321 id,
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322 AuNone,
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323 AuFixedPointFromFraction (volume, 100),
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324 doneCB, (AuPointer) &sounds_in_play,
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325 1,
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326 NULL, NULL,
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327 NULL, NULL);
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328
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329 }
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330 #endif /* CACHE_SOUNDS */
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331
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332
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432
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333 void wait_for_sounds (void);
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428
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334 void
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335 wait_for_sounds (void)
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336
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337 {
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338 AuEvent ev;
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339
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340 while (sounds_in_play>0)
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341 {
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342 AuNextEvent (aud, AuTrue, &ev);
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343 AuDispatchEvent (aud, &ev);
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344 }
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345 }
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346
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432
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347 int play_sound_file (char *sound_file, int volume);
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428
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348 int
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349 play_sound_file (char *sound_file,
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350 int volume)
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351 {
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432
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352 SIGTYPE (*old_sigpipe) (int);
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428
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353
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354 #ifdef ROBUST_PLAY
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355 old_sigpipe=signal (SIGPIPE, sigpipe_handle);
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356 if (setjmp (AuXtErrorJump))
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357 {
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358 signal (SIGPIPE, old_sigpipe);
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359 return 0;
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360 }
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361 #endif
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362
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363 if (aud==NULL) {
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364 if (aud_server != NULL)
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365 {
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366 char *m;
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367 /* attempt to reconect */
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368 if ((m=init_play (aud_server))!= NULL)
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369 {
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370
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371 #ifdef ROBUST_PLAY
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372 signal (SIGPIPE, old_sigpipe);
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373 #endif
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374 return 0;
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375 }
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376 }
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377 else
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378 {
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379 warn ("Attempt to play with no audio init\n");
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380 #ifdef ROBUST_PLAY
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381 signal (SIGPIPE, old_sigpipe);
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382 #endif
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383 return 0;
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384 }
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385 }
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386
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387 #ifndef CACHE_SOUNDS
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388 sounds_in_play++;
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389 AuSoundPlayFromFile (aud,
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390 sound_file,
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391 AuNone,
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392 AuFixedPointFromFraction (volume,100),
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393 doneCB, (AuPointer) &sounds_in_play,
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394 NULL,
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395 NULL,
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396 NULL,
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397 NULL);
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398 #else
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399 /* Cache the sounds in buckets on the server */
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400
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401 {
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402 Sound s;
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403
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404 if ((s = SoundOpenFileForReading (sound_file))==NULL)
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405 {
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406 #ifdef ROBUST_PLAY
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407 signal (SIGPIPE, old_sigpipe);
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408 #endif
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409 return 0;
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410 }
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411
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412 if (SoundComment (s) == NULL || SoundComment (s)[0] == '\0')
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413 {
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414 SoundComment (s) = FileCommentFromFilename (sound_file);
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415 }
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416
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417 do_caching_play (s, volume, NULL);
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418
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419 SoundCloseFile (s);
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420
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421 }
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422 #endif /* CACHE_SOUNDS */
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423
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424 #ifndef XTEVENTS
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425 wait_for_sounds ();
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426 #else
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427 if (!NILP (Vsynchronous_sounds))
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428 {
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429 wait_for_sounds ();
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430 }
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431 #endif
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432
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433 #ifdef ROBUST_PLAY
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434 signal (SIGPIPE, old_sigpipe);
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435 #endif
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436
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437 return 1;
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438 }
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439
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432
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440 int play_sound_data (unsigned char *data, int length, int volume);
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428
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441 int
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442 play_sound_data (unsigned char *data,
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443 int length,
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444 int volume)
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445 {
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446 Sound s;
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447 int offset;
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432
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448 SIGTYPE (*old_sigpipe) (int);
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428
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449
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450 #if !defined (XTEVENTS)
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451 AuEvent ev;
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452 #endif
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453
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|
|
454 #ifdef ROBUST_PLAY
|
|
|
455 old_sigpipe = signal (SIGPIPE, sigpipe_handle);
|
|
|
456 if (setjmp (AuXtErrorJump) !=0)
|
|
|
457 {
|
|
|
458 signal (SIGPIPE, old_sigpipe);
|
|
|
459 return 0;
|
|
|
460 }
|
|
|
461 #endif
|
|
|
462
|
|
|
463
|
|
|
464 if (aud == NULL) {
|
|
|
465 if (aud_server != NULL)
|
|
|
466 {
|
|
|
467 char *m;
|
|
|
468 /* attempt to reconect */
|
|
|
469 if ((m = init_play (aud_server)) != NULL)
|
|
|
470 {
|
|
|
471 #ifdef ROBUST_PLAY
|
|
|
472 signal (SIGPIPE, old_sigpipe);
|
|
|
473 #endif
|
|
|
474 return 0;
|
|
|
475 }
|
|
|
476 }
|
|
|
477 else
|
|
|
478 {
|
|
|
479 warn ("Attempt to play with no audio init\n");
|
|
|
480 #ifdef ROBUST_PLAY
|
|
|
481 signal (SIGPIPE, old_sigpipe);
|
|
|
482 #endif
|
|
|
483 return 0;
|
|
|
484 }
|
|
|
485 }
|
|
|
486
|
|
|
487 if ((s=SoundOpenDataForReading (data, length))==NULL)
|
|
|
488 {
|
|
|
489 warn ("unknown sound type");
|
|
|
490 #ifdef ROBUST_PLAY
|
|
|
491 signal (SIGPIPE, old_sigpipe);
|
|
|
492 #endif
|
|
|
493 return 0;
|
|
|
494 }
|
|
|
495
|
|
|
496 if (SoundFileFormat (s) == SoundFileFormatSnd)
|
|
|
497 {
|
|
|
498 /* hack, hack */
|
|
|
499 offset = ((SndInfo *) (s->formatInfo))->h.dataOffset;
|
|
|
500 }
|
|
|
501 else if (SoundFileFormat (s) == SoundFileFormatWave)
|
|
|
502 {
|
|
|
503 offset = ((WaveInfo *) (s->formatInfo))->dataOffset;
|
|
|
504 }
|
|
|
505 else
|
|
|
506 {
|
|
|
507 warn ("only understand snd and wave files at the moment");
|
|
|
508 SoundCloseFile (s);
|
|
|
509 #ifdef ROBUST_PLAY
|
|
|
510 signal (SIGPIPE, old_sigpipe);
|
|
|
511 #endif
|
|
|
512 return 0;
|
|
|
513 }
|
|
|
514
|
|
|
515 #ifndef CACHE_SOUNDS
|
|
|
516 sounds_in_play++;
|
|
|
517 AuSoundPlayFromData (aud,
|
|
|
518 s,
|
|
|
519 data+offset,
|
|
|
520 AuNone,
|
|
|
521 AuFixedPointFromFraction (volume,100),
|
|
|
522 doneCB, (AuPointer) &sounds_in_play,
|
|
|
523 NULL,
|
|
|
524 NULL,
|
|
|
525 NULL,
|
|
|
526 NULL);
|
|
|
527 #else
|
|
|
528 /* Cache the sounds in buckets on the server */
|
|
|
529
|
|
|
530 {
|
|
|
531 do_caching_play (s, volume, data+offset);
|
|
|
532 }
|
|
|
533 #endif /* CACHE_SOUNDS */
|
|
|
534
|
|
|
535
|
|
|
536 #ifndef XTEVENTS
|
|
|
537 wait_for_sounds ();
|
|
|
538 #else
|
|
|
539 if (!NILP (Vsynchronous_sounds))
|
|
|
540 {
|
|
|
541 wait_for_sounds ();
|
|
|
542 }
|
|
|
543 #endif
|
|
|
544
|
|
|
545 SoundCloseFile (s);
|
|
|
546
|
|
|
547 #ifdef ROBUST_PLAY
|
|
|
548 signal (SIGPIPE, old_sigpipe);
|
|
|
549 #endif
|
|
|
550
|
|
|
551 return 1;
|
|
|
552 }
|
|
|
553
|
|
|
554 #if defined (ROBUST_PLAY)
|
|
|
555
|
|
|
556 /********************************************************************\
|
|
|
557 * *
|
|
|
558 * Code to protect the client from server shutdowns. *
|
|
|
559 * *
|
|
|
560 * This is unbelievably horrible. *
|
|
|
561 * *
|
|
|
562 \********************************************************************/
|
|
|
563
|
|
|
564 static AuBool
|
|
|
565 CatchIoErrorAndJump (AuServer *old_aud)
|
|
|
566 {
|
|
|
567 if (old_aud)
|
|
|
568 warn ("Audio Server connection broken");
|
|
|
569 else
|
|
|
570 warn ("Audio Server connection broken because of signal");
|
|
|
571
|
|
|
572 #ifdef XTEVENTS
|
|
|
573 #ifdef XTOOLKIT
|
|
|
574 {
|
|
|
575 AuXtAppRemoveAudioHandler (aud, input_id);
|
|
|
576 }
|
|
|
577 #endif
|
|
|
578
|
|
|
579 if (aud)
|
|
|
580 AuCloseServer (aud);
|
|
|
581 aud = NULL;
|
|
|
582 sounds_in_play = 0;
|
|
|
583
|
|
|
584 longjmp (AuXtErrorJump, 1);
|
|
|
585
|
|
|
586 #else /* not XTEVENTS */
|
|
|
587
|
|
|
588 if (aud)
|
|
|
589 AuCloseServer (aud);
|
|
|
590 aud = NULL;
|
|
|
591 sounds_in_play = 0;
|
|
|
592 longjmp (AuXtErrorJump, 1);
|
|
|
593
|
|
|
594 #endif /* XTEVENTS */
|
|
|
595 return 0;
|
|
|
596 }
|
|
|
597
|
|
|
598 SIGTYPE
|
|
|
599 sigpipe_handle (int signo)
|
|
|
600 {
|
|
|
601 CatchIoErrorAndJump (NULL);
|
|
|
602 }
|
|
|
603
|
|
|
604 static AuBool
|
|
|
605 CatchErrorAndJump (AuServer *old_aud,
|
|
|
606 AuErrorEvent *event)
|
|
|
607 {
|
|
|
608 return CatchIoErrorAndJump (old_aud);
|
|
|
609 }
|
|
|
610
|
|
|
611 #endif /* ROBUST_PLAY */
|
|
|
612
|
|
|
613 /********************************************************************\
|
|
|
614 * *
|
|
|
615 * This code is here because the nas Sound library doesn't *
|
|
|
616 * support playing from a file buffered in memory. It's a fairly *
|
|
|
617 * direct translation of the file-based equivalent. *
|
|
|
618 * *
|
|
|
619 * Since we don't have a filename, samples with no comment field *
|
|
|
620 * are named by a section of their content. *
|
|
|
621 * *
|
|
|
622 \********************************************************************/
|
|
|
623
|
|
|
624 /* Create a name from the sound. */
|
|
|
625
|
|
|
626 static char *
|
|
432
|
627 NameFromData (CONST char *buf,
|
|
428
|
628 int len)
|
|
|
629
|
|
|
630 {
|
|
432
|
631 char name[9];
|
|
428
|
632 int i;
|
|
|
633 char *s;
|
|
|
634
|
|
|
635 buf+=len/2;
|
|
|
636 len -= len/2;
|
|
|
637
|
|
|
638 i=0;
|
|
|
639 while (i<8 && len >0)
|
|
|
640 {
|
|
|
641 while (*buf < 32 && len>0)
|
|
|
642 {
|
|
|
643 buf++;
|
|
|
644 len--;
|
|
|
645 }
|
|
|
646 name[i]= *buf;
|
|
|
647 i++;
|
|
|
648 buf++;
|
|
|
649 len--;
|
|
|
650 }
|
|
|
651
|
|
|
652 name[i]='\0';
|
|
|
653
|
|
|
654 if (i==8)
|
|
|
655 {
|
|
432
|
656 strcpy (s = (char *) malloc (10), name);
|
|
428
|
657 }
|
|
|
658 else
|
|
|
659 {
|
|
432
|
660 strcpy (s = (char *) malloc (15), "short sound");
|
|
428
|
661 }
|
|
|
662
|
|
|
663 return s;
|
|
|
664 }
|
|
|
665
|
|
|
666 /* Code to do a pseudo-open on a data buffer. Only for snd files at the
|
|
|
667 moment.
|
|
|
668 */
|
|
|
669
|
|
|
670 static SndInfo *
|
|
|
671 SndOpenDataForReading (CONST char *data,
|
|
|
672 int length)
|
|
|
673
|
|
|
674 {
|
|
|
675 SndInfo *si;
|
|
|
676 int size;
|
|
|
677
|
|
|
678 if (!(si = (SndInfo *) malloc (sizeof (SndInfo))))
|
|
|
679 return NULL;
|
|
|
680
|
|
|
681 si->comment = NULL;
|
|
|
682 si->writing = 0;
|
|
|
683
|
|
|
684 memcpy (&si->h, data, sizeof (SndHeader));
|
|
|
685
|
|
|
686 if (LITTLE_ENDIAN)
|
|
|
687 {
|
|
|
688 char n;
|
|
|
689
|
|
|
690 swapl (&si->h.magic, n);
|
|
|
691 swapl (&si->h.dataOffset, n);
|
|
|
692 swapl (&si->h.dataSize, n);
|
|
|
693 swapl (&si->h.format, n);
|
|
|
694 swapl (&si->h.sampleRate, n);
|
|
|
695 swapl (&si->h.tracks, n);
|
|
|
696 }
|
|
|
697
|
|
|
698 if (si->h.magic != SND_MAGIC_NUM)
|
|
|
699 {
|
|
|
700 free (si);
|
|
|
701 return NULL;
|
|
|
702 }
|
|
|
703
|
|
|
704 size = si->h.dataOffset - sizeof (SndHeader);
|
|
|
705
|
|
|
706 if (size)
|
|
|
707 {
|
|
|
708 if (!(si->comment = (char *) malloc (size + 1)))
|
|
|
709 {
|
|
|
710 free (si);
|
|
|
711 return NULL;
|
|
|
712 }
|
|
|
713
|
|
|
714 memcpy (si->comment, data+sizeof (SndHeader), size);
|
|
|
715
|
|
|
716 *(si->comment + size) = 0;
|
|
|
717 if (*si->comment == '\0')
|
|
|
718 si->comment =
|
|
|
719 NameFromData (data+si->h.dataOffset, length-si->h.dataOffset);
|
|
|
720 }
|
|
|
721 else
|
|
|
722 si->comment = NameFromData (data+si->h.dataOffset, length-si->h.dataOffset);
|
|
|
723
|
|
|
724 si->h.dataSize = length-si->h.dataOffset;
|
|
|
725
|
|
|
726 si->fp=NULL;
|
|
|
727
|
|
|
728 return si;
|
|
|
729 }
|
|
|
730
|
|
|
731 /* Stuff taken from wave.c from NAS. Just like snd files, NAS can't
|
|
|
732 read wave data from memory, so these functions do that for us. */
|
|
|
733
|
|
|
734 #define Err() { return NULL; }
|
|
|
735 #define readFourcc(_f) dread(_f, sizeof(RIFF_FOURCC), 1)
|
|
|
736 #define cmpID(_x, _y) \
|
|
|
737 strncmp((char *) (_x), (char *) (_y), sizeof(RIFF_FOURCC))
|
|
|
738 #define PAD2(_x) (((_x) + 1) & ~1)
|
|
|
739
|
|
|
740 /* These functions here are for faking file I/O from buffer. */
|
|
|
741
|
|
|
742 /* The "file" position */
|
|
432
|
743 static size_t file_posn;
|
|
428
|
744 /* The length of the "file" */
|
|
432
|
745 static size_t file_len;
|
|
428
|
746 /* The actual "file" data. */
|
|
432
|
747 static CONST void* file_data;
|
|
428
|
748
|
|
|
749 /* Like fopen, but for a buffer in memory */
|
|
|
750 static void
|
|
432
|
751 dopen (CONST void* data, size_t length)
|
|
428
|
752 {
|
|
|
753 file_data = data;
|
|
|
754 file_len = length;
|
|
|
755 file_posn = 0;
|
|
|
756 }
|
|
|
757
|
|
|
758 /* Like fread, but for a buffer in memory */
|
|
|
759 static int
|
|
432
|
760 dread (void* buf, size_t size, size_t nitems)
|
|
428
|
761 {
|
|
432
|
762 size_t nread = size * nitems;
|
|
428
|
763
|
|
|
764 if (file_posn + nread <= file_len)
|
|
|
765 {
|
|
432
|
766 memcpy(buf, (char *) file_data + file_posn, size * nitems);
|
|
428
|
767 file_posn += nread;
|
|
|
768 return nitems;
|
|
|
769 }
|
|
|
770 else
|
|
|
771 {
|
|
|
772 return EOF;
|
|
|
773 }
|
|
|
774 }
|
|
|
775
|
|
|
776 /* Like fgetc, but for a buffer in memory */
|
|
|
777 static int
|
|
432
|
778 dgetc (void)
|
|
428
|
779 {
|
|
|
780 if (file_posn < file_len)
|
|
432
|
781 return ((char *)file_data)[file_posn++];
|
|
428
|
782 else
|
|
|
783 return -1;
|
|
|
784 }
|
|
|
785
|
|
|
786 /* Like fseek, but for a buffer in memory */
|
|
|
787 static int
|
|
432
|
788 dseek (long offset, int from)
|
|
428
|
789 {
|
|
|
790 if (from == 0)
|
|
|
791 file_posn = offset;
|
|
|
792 else if (from == 1)
|
|
|
793 file_posn += offset;
|
|
|
794 else if (from == 2)
|
|
|
795 file_posn = file_len + offset;
|
|
|
796
|
|
|
797 return 0;
|
|
|
798 }
|
|
|
799
|
|
|
800 /* Like ftell, but for a buffer in memory */
|
|
432
|
801 static long
|
|
428
|
802 dtell()
|
|
|
803 {
|
|
|
804 return file_posn;
|
|
|
805 }
|
|
|
806
|
|
|
807 /* Data buffer analogs for FileReadS and FileReadL in NAS. */
|
|
|
808
|
|
|
809 static unsigned short
|
|
|
810 DataReadS(int swapit)
|
|
|
811 {
|
|
|
812 unsigned short us;
|
|
|
813
|
|
|
814 dread(&us, 2, 1);
|
|
|
815 if (swapit)
|
|
|
816 us = FileSwapS(us);
|
|
|
817 return us;
|
|
|
818 }
|
|
|
819
|
|
|
820 static AuUint32
|
|
|
821 DataReadL(int swapit)
|
|
|
822 {
|
|
|
823 AuUint32 ul;
|
|
|
824
|
|
|
825 dread(&ul, 4, 1);
|
|
|
826 if (swapit)
|
|
|
827 ul = FileSwapL(ul);
|
|
|
828 return ul;
|
|
|
829 }
|
|
|
830
|
|
|
831 static int
|
|
|
832 readChunk(RiffChunk *c)
|
|
|
833 {
|
|
|
834 int status;
|
|
|
835 char n;
|
|
|
836
|
|
|
837 if ((status = dread(c, sizeof(RiffChunk), 1)))
|
|
|
838 if (BIG_ENDIAN)
|
|
|
839 swapl(&c->ckSize, n);
|
|
|
840
|
|
|
841 return status;
|
|
|
842 }
|
|
|
843
|
|
|
844 /* A very straight-forward translation of WaveOpenFileForReading to
|
|
|
845 read the wave data from a buffer in memory. */
|
|
|
846
|
|
|
847 static WaveInfo *
|
|
|
848 WaveOpenDataForReading(CONST char *data,
|
|
|
849 int length)
|
|
|
850 {
|
|
|
851 RiffChunk ck;
|
|
|
852 RIFF_FOURCC fourcc;
|
|
|
853 AuInt32 fileSize;
|
|
|
854 WaveInfo *wi;
|
|
|
855
|
|
|
856
|
|
|
857 if (!(wi = (WaveInfo *) malloc(sizeof(WaveInfo))))
|
|
|
858 return NULL;
|
|
|
859
|
|
|
860 wi->comment = NULL;
|
|
|
861 wi->dataOffset = wi->format = wi->writing = 0;
|
|
|
862
|
|
|
863 dopen(data, length);
|
|
|
864
|
|
|
865 if (!readChunk(&ck) ||
|
|
|
866 cmpID(&ck.ckID, RIFF_RiffID) ||
|
|
|
867 !readFourcc(&fourcc) ||
|
|
|
868 cmpID(&fourcc, RIFF_WaveID))
|
|
|
869 Err();
|
|
|
870
|
|
|
871 fileSize = PAD2(ck.ckSize) - sizeof(RIFF_FOURCC);
|
|
|
872
|
|
|
873 while (fileSize >= sizeof(RiffChunk))
|
|
|
874 {
|
|
|
875 if (!readChunk(&ck))
|
|
|
876 Err();
|
|
|
877
|
|
|
878 fileSize -= sizeof(RiffChunk) + PAD2(ck.ckSize);
|
|
|
879
|
|
|
880 /* LIST chunk */
|
|
|
881 if (!cmpID(&ck.ckID, RIFF_ListID))
|
|
|
882 {
|
|
|
883 if (!readFourcc(&fourcc))
|
|
|
884 Err();
|
|
|
885
|
|
|
886 /* INFO chunk */
|
|
|
887 if (!cmpID(&fourcc, RIFF_ListInfoID))
|
|
|
888 {
|
|
|
889 ck.ckSize -= sizeof(RIFF_FOURCC);
|
|
|
890
|
|
|
891 while (ck.ckSize)
|
|
|
892 {
|
|
|
893 RiffChunk c;
|
|
|
894
|
|
|
895 if (!readChunk(&c))
|
|
|
896 Err();
|
|
|
897
|
|
|
898 /* ICMT chunk */
|
|
|
899 if (!cmpID(&c.ckID, RIFF_InfoIcmtID))
|
|
|
900 {
|
|
|
901 if (!(wi->comment = (char *) malloc(c.ckSize)) ||
|
|
|
902 !dread(wi->comment, c.ckSize, 1))
|
|
|
903 Err();
|
|
|
904
|
|
|
905 if (c.ckSize & 1)
|
|
|
906 dgetc(); /* eat the pad byte */
|
|
|
907 }
|
|
|
908 else
|
|
|
909 /* skip unknown chunk */
|
|
|
910 dseek(PAD2(c.ckSize), 1);
|
|
|
911
|
|
|
912 ck.ckSize -= sizeof(RiffChunk) + PAD2(c.ckSize);
|
|
|
913 }
|
|
|
914 }
|
|
|
915 else
|
|
|
916 /* skip unknown chunk */
|
|
|
917 dseek(PAD2(ck.ckSize) - sizeof(RIFF_FOURCC), 1);
|
|
|
918 }
|
|
|
919 /* wave format chunk */
|
|
|
920 else if (!cmpID(&ck.ckID, RIFF_WaveFmtID) && !wi->format)
|
|
|
921 {
|
|
|
922 AuInt32 dummy;
|
|
|
923
|
|
|
924 wi->format = DataReadS(BIG_ENDIAN);
|
|
|
925 wi->channels = DataReadS(BIG_ENDIAN);
|
|
|
926 wi->sampleRate = DataReadL(BIG_ENDIAN);
|
|
|
927
|
|
|
928 /* we don't care about the next two fields */
|
|
|
929 dummy = DataReadL(BIG_ENDIAN);
|
|
|
930 dummy = DataReadS(BIG_ENDIAN);
|
|
|
931
|
|
|
932 if (wi->format != RIFF_WAVE_FORMAT_PCM)
|
|
|
933 Err();
|
|
|
934
|
|
|
935 wi->bitsPerSample = DataReadS(BIG_ENDIAN);
|
|
|
936
|
|
|
937 /* skip any other format specific fields */
|
|
|
938 dseek(PAD2(ck.ckSize - 16), 1);
|
|
|
939 }
|
|
|
940 /* wave data chunk */
|
|
|
941 else if (!cmpID(&ck.ckID, RIFF_WaveDataID) && !wi->dataOffset)
|
|
|
942 {
|
|
|
943 long endOfFile;
|
|
|
944
|
|
|
945 wi->dataOffset = dtell();
|
|
|
946 wi->dataSize = ck.ckSize;
|
|
|
947 dseek(0, 2);
|
|
|
948 endOfFile = dtell();
|
|
|
949
|
|
|
950 /* seek past the data */
|
|
|
951 if (dseek(wi->dataOffset + PAD2(ck.ckSize), 0) ||
|
|
|
952 dtell() > endOfFile)
|
|
|
953 {
|
|
|
954 /* the seek failed, assume the size is bogus */
|
|
|
955 dseek(0, 2);
|
|
|
956 wi->dataSize = dtell() - wi->dataOffset;
|
|
|
957 }
|
|
|
958
|
|
|
959 wi->dataOffset -= sizeof(long);
|
|
|
960 }
|
|
|
961 else
|
|
|
962 /* skip unknown chunk */
|
|
|
963 dseek(PAD2(ck.ckSize), 1);
|
|
|
964 }
|
|
|
965
|
|
|
966 if (!wi->dataOffset)
|
|
|
967 Err();
|
|
|
968
|
|
|
969 wi->numSamples = wi->dataSize / wi->channels / (wi->bitsPerSample >> 3);
|
|
|
970
|
|
|
971 if (!wi->comment)
|
|
|
972 wi->comment = NameFromData (data + wi->dataOffset,
|
|
|
973 length - wi->dataOffset);
|
|
|
974
|
|
|
975 wi->fp = NULL;
|
|
|
976
|
|
|
977 return wi;
|
|
|
978 }
|
|
|
979
|
|
|
980
|
|
|
981 static Sound
|
|
|
982 SoundOpenDataForReading (unsigned char *data,
|
|
|
983 int length)
|
|
|
984
|
|
|
985 {
|
|
|
986 Sound s;
|
|
|
987
|
|
|
988 if (!(s = (Sound) malloc (sizeof (SoundRec))))
|
|
|
989 return NULL;
|
|
|
990
|
|
432
|
991 if ((s->formatInfo = SndOpenDataForReading ((char *) data, length)) != NULL)
|
|
428
|
992 {
|
|
432
|
993 if (!((int(*)(Sound))(SoundFileInfo[SoundFileFormatSnd].toSound)) (s))
|
|
428
|
994 {
|
|
432
|
995 SndCloseFile ((SndInfo *) (s->formatInfo));
|
|
428
|
996 free (s);
|
|
|
997 return NULL;
|
|
|
998 }
|
|
|
999 }
|
|
432
|
1000 else if ((s->formatInfo = WaveOpenDataForReading ((char *) data, length)) != NULL)
|
|
428
|
1001 {
|
|
432
|
1002 if (!((int(*)(Sound))(SoundFileInfo[SoundFileFormatWave].toSound)) (s))
|
|
428
|
1003 {
|
|
432
|
1004 WaveCloseFile ((WaveInfo *) (s->formatInfo));
|
|
428
|
1005 free (s);
|
|
|
1006 return NULL;
|
|
|
1007 }
|
|
|
1008 }
|
|
|
1009
|
|
|
1010 return s;
|
|
|
1011 }
|
