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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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58 #endif
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59
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82
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60 #if __STDC__ || defined (STDC_HEADERS)
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61 # include <stdlib.h>
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62 # include <stdarg.h>
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63 # include <string.h>
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16
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64 #endif
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0
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65
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16
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66 #ifdef HAVE_UNISTD_H
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67 #include <unistd.h>
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0
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68 #endif
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69
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70 #include <stdio.h>
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371
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71 #include "syssignal.h"
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0
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72
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272
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73 #undef LITTLE_ENDIAN
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74 #undef BIG_ENDIAN
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0
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75 #include <audio/audiolib.h>
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76 #include <audio/soundlib.h>
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77 #include <audio/snd.h>
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375
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78 #include <audio/wave.h>
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0
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79 #include <audio/fileutil.h>
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80
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81 #ifdef emacs
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82
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83 # define XTOOLKIT
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84 # define XTEVENTS
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85 # define ROBUST_PLAY
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86 # define CACHE_SOUNDS
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87
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88 /*
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89 * For old NAS libraries, force playing to be synchronous
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90 * and declare the long jump point locally.
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91 */
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92
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93 # if defined (NAS_NO_ERROR_JUMP)
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94
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95 # undef XTEVENTS
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96
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97 # include <setjmp.h>
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98 jmp_buf AuXtErrorJump;
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99 # endif
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100
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101 /* The GETTEXT is correct. --ben */
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102 # define warn(str) warn_when_safe (Qnas, Qwarning, "nas: %s ", GETTEXT (str))
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103
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104 # define play_sound_file nas_play_sound_file
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105 # define play_sound_data nas_play_sound_data
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106 # define wait_for_sounds nas_wait_for_sounds
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107 # define init_play nas_init_play
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108 # define close_down_play nas_close_down_play
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109
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110 #else /* !emacs */
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111 # define warn(str) fprintf (stderr, "%s\n", (str))
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112 # define CONST const
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113 #endif /* emacs */
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114
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115 #ifdef XTOOLKIT
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116 # include <X11/Intrinsic.h>
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117 # include <audio/Xtutil.h>
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118 #endif
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119
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120 #if defined (ROBUST_PLAY)
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121 static AuBool CatchIoErrorAndJump (AuServer *aud);
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122 static AuBool CatchErrorAndJump (AuServer *aud, AuErrorEvent *event);
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123 SIGTYPE sigpipe_handle (int signo);
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124 #endif
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125
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126 extern Lisp_Object Vsynchronous_sounds;
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127
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128 static Sound SoundOpenDataForReading (unsigned char *data, int length);
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129
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130 static AuServer *aud;
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131
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132 /* count of sounds currently being played. */
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133 static int sounds_in_play;
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134
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135
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136 #ifdef XTOOLKIT
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137 static Display *aud_server;
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138 static XtInputId input_id;
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139 #else
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140 static char *aud_server;
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141 #endif /* XTOOLKIT */
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142
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143 char *
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144 init_play (
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145 #ifdef XTOOLKIT
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146 Display *display
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147 #else
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148 char *server
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149 #endif
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150 )
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151 {
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152 char *err_message;
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153 SIGTYPE (*old_sigpipe) ();
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154
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155 #ifdef XTOOLKIT
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156 char * server = DisplayString (display);
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157 XtAppContext app_context = XtDisplayToApplicationContext (display);
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158
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159 aud_server = display;
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160 #else
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161
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162 aud_server = server;
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163 #endif
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164
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165 #ifdef ROBUST_PLAY
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166 old_sigpipe = signal (SIGPIPE, sigpipe_handle);
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167 if (setjmp (AuXtErrorJump))
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168 {
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169 signal (SIGPIPE, old_sigpipe);
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170 #ifdef emacs
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171 start_interrupts ();
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172 #endif
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173 return "error in NAS";
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174 }
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175 #endif
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176
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177 #if defined (ROBUST_PLAY) && !defined (NAS_NO_ERROR_JUMP)
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178 AuDefaultIOErrorHandler = CatchIoErrorAndJump;
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179 AuDefaultErrorHandler = CatchErrorAndJump;
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180 #endif
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181
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182 #ifdef emacs
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183 stop_interrupts ();
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184 #endif
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185 aud = AuOpenServer (server, 0, NULL, 0, NULL, &err_message);
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186 #ifdef emacs
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187 start_interrupts ();
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188 #endif
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189 if (!aud)
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190 {
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191 #ifdef ROBUST_PLAY
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192 signal (SIGPIPE, old_sigpipe);
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193 #endif
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194 if (err_message == NULL)
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195 return "Can't connect to audio server";
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196 else
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197 return err_message;
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198 }
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199
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200 #if defined (ROBUST_PLAY)
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201 # if defined (NAS_NO_ERROR_JUMP)
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202 aud->funcs.ioerror_handler = CatchIoErrorAndJump;
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203 aud->funcs.error_handler = CatchErrorAndJump;
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204 # else /* !NAS_NO_ERROR_JUMP */
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205 AuDefaultIOErrorHandler = NULL;
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206 AuDefaultErrorHandler = NULL;
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207 # endif
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208 #endif
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209
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210 #ifdef XTEVENTS
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211 input_id = AuXtAppAddAudioHandler (app_context, aud);
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212 #endif
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213
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214 #ifdef CACHE_SOUNDS
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215 AuSetCloseDownMode (aud, AuCloseDownRetainPermanent, NULL);
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216 #endif
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217
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218 #ifdef ROBUST_PLAY
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219 signal (SIGPIPE, old_sigpipe);
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220 #endif
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221
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222 sounds_in_play = 0;
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223
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224 return NULL;
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225 }
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226
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227 void
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228 close_down_play (void)
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229
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230 {
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231 AuCloseServer (aud);
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232 warn ("disconnected from audio server");
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233 }
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234
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235 /********************************************************************\
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236 * *
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237 * Callback which is run when the sound finishes playing. *
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238 * *
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239 \********************************************************************/
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240
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241 static void
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242 doneCB (AuServer *aud,
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243 AuEventHandlerRec *handler,
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244 AuEvent *ev,
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245 AuPointer data)
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246 {
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247 int *in_play_p = (int *) data;
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248
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249 (*in_play_p) --;
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250 }
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251
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252 #ifdef CACHE_SOUNDS
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253
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254 /********************************************************************\
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255 * *
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256 * Play a sound by playing the relevant bucket, if any or *
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257 * downloading it if not. *
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258 * *
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259 \********************************************************************/
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260
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261 static void
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262 do_caching_play (Sound s,
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263 int volume,
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264 unsigned char *buf)
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265
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266 {
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267 AuBucketAttributes *list, b;
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268 AuBucketID id;
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269 int n;
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270
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271 AuSetString (AuBucketDescription (&b),
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272 AuStringLatin1, strlen (SoundComment (s)), SoundComment (s));
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273
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274 list = AuListBuckets (aud, AuCompCommonDescriptionMask, &b, &n, NULL);
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275
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276 if (list == NULL)
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277 {
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278 unsigned char *my_buf;
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279
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280 if (buf==NULL)
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281 {
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282 if ((my_buf=malloc (SoundNumBytes (s)))==NULL)
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283 {
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284 return;
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285 }
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286
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287 if (SoundReadFile (my_buf, SoundNumBytes (s), s) != SoundNumBytes (s))
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288 {
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289 free (my_buf);
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290 return;
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291 }
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292 }
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293 else
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294 my_buf=buf;
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295
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296 id = AuSoundCreateBucketFromData (aud,
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297 s,
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298 my_buf,
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299 AuAccessAllMasks,
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300 NULL,
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301 NULL);
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302 if (buf == NULL)
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303 free (my_buf);
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304 }
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305 else /* found cached sound */
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306 {
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307 id = AuBucketIdentifier (list);
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308 AuFreeBucketAttributes (aud, n, list);
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309 }
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310
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311 sounds_in_play++;
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312
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313 AuSoundPlayFromBucket (aud,
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314 id,
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315 AuNone,
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316 AuFixedPointFromFraction (volume, 100),
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317 doneCB, (AuPointer) &sounds_in_play,
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318 1,
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319 NULL, NULL,
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320 NULL, NULL);
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321
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322 }
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323 #endif /* CACHE_SOUNDS */
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324
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325
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326 void
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327 wait_for_sounds (void)
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328
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329 {
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330 AuEvent ev;
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331
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332 while (sounds_in_play>0)
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333 {
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334 AuNextEvent (aud, AuTrue, &ev);
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335 AuDispatchEvent (aud, &ev);
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336 }
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337 }
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338
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339 int
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340 play_sound_file (char *sound_file,
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341 int volume)
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342 {
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343 SIGTYPE (*old_sigpipe) ();
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344
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345 #ifdef ROBUST_PLAY
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346 old_sigpipe=signal (SIGPIPE, sigpipe_handle);
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347 if (setjmp (AuXtErrorJump))
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348 {
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349 signal (SIGPIPE, old_sigpipe);
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350 return 0;
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351 }
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352 #endif
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353
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263
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354 if (aud==NULL) {
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0
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355 if (aud_server != NULL)
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356 {
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357 char *m;
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358 /* attempt to reconect */
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359 if ((m=init_play (aud_server))!= NULL)
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360 {
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361
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362 #ifdef ROBUST_PLAY
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363 signal (SIGPIPE, old_sigpipe);
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364 #endif
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365 return 0;
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366 }
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367 }
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368 else
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369 {
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370 warn ("Attempt to play with no audio init\n");
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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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263
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376 }
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0
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377
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378 #ifndef CACHE_SOUNDS
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379 sounds_in_play++;
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380 AuSoundPlayFromFile (aud,
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381 sound_file,
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382 AuNone,
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383 AuFixedPointFromFraction (volume,100),
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384 doneCB, (AuPointer) &sounds_in_play,
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385 NULL,
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386 NULL,
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387 NULL,
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388 NULL);
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389 #else
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390 /* Cache the sounds in buckets on the server */
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391
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392 {
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393 Sound s;
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394
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395 if ((s = SoundOpenFileForReading (sound_file))==NULL)
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396 {
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397 #ifdef ROBUST_PLAY
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398 signal (SIGPIPE, old_sigpipe);
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399 #endif
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400 return 0;
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401 }
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402
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403 if (SoundComment (s) == NULL || SoundComment (s)[0] == '\0')
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404 {
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405 SoundComment (s) = FileCommentFromFilename (sound_file);
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406 }
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407
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408 do_caching_play (s, volume, NULL);
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409
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410 SoundCloseFile (s);
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411
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412 }
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413 #endif /* CACHE_SOUNDS */
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414
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415 #ifndef XTEVENTS
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416 wait_for_sounds ();
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417 #else
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418 if (!NILP (Vsynchronous_sounds))
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419 {
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420 wait_for_sounds ();
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421 }
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422 #endif
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423
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424 #ifdef ROBUST_PLAY
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425 signal (SIGPIPE, old_sigpipe);
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426 #endif
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427
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428 return 1;
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429 }
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430
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431 int
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432 play_sound_data (unsigned char *data,
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433 int length,
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434 int volume)
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435 {
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436 Sound s;
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437 int offset;
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438 SIGTYPE (*old_sigpipe) ();
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439
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440 #if !defined (XTEVENTS)
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441 AuEvent ev;
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442 #endif
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443
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444 #ifdef ROBUST_PLAY
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445 old_sigpipe = signal (SIGPIPE, sigpipe_handle);
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446 if (setjmp (AuXtErrorJump) !=0)
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447 {
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448 signal (SIGPIPE, old_sigpipe);
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449 return 0;
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450 }
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451 #endif
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452
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453
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263
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454 if (aud == NULL) {
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0
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455 if (aud_server != NULL)
|
|
|
456 {
|
|
|
457 char *m;
|
|
|
458 /* attempt to reconect */
|
|
|
459 if ((m = init_play (aud_server)) != NULL)
|
|
|
460 {
|
|
|
461 #ifdef ROBUST_PLAY
|
|
|
462 signal (SIGPIPE, old_sigpipe);
|
|
|
463 #endif
|
|
|
464 return 0;
|
|
|
465 }
|
|
|
466 }
|
|
|
467 else
|
|
|
468 {
|
|
|
469 warn ("Attempt to play with no audio init\n");
|
|
|
470 #ifdef ROBUST_PLAY
|
|
|
471 signal (SIGPIPE, old_sigpipe);
|
|
|
472 #endif
|
|
|
473 return 0;
|
|
|
474 }
|
|
263
|
475 }
|
|
0
|
476
|
|
|
477 if ((s=SoundOpenDataForReading (data, length))==NULL)
|
|
|
478 {
|
|
|
479 warn ("unknown sound type");
|
|
|
480 #ifdef ROBUST_PLAY
|
|
|
481 signal (SIGPIPE, old_sigpipe);
|
|
|
482 #endif
|
|
|
483 return 0;
|
|
|
484 }
|
|
|
485
|
|
|
486 if (SoundFileFormat (s) == SoundFileFormatSnd)
|
|
|
487 {
|
|
|
488 /* hack, hack */
|
|
|
489 offset = ((SndInfo *) (s->formatInfo))->h.dataOffset;
|
|
|
490 }
|
|
375
|
491 else if (SoundFileFormat (s) == SoundFileFormatWave)
|
|
|
492 {
|
|
|
493 offset = ((WaveInfo *) (s->formatInfo))->dataOffset;
|
|
|
494 }
|
|
0
|
495 else
|
|
|
496 {
|
|
375
|
497 warn ("only understand snd and wave files at the moment");
|
|
0
|
498 SoundCloseFile (s);
|
|
|
499 #ifdef ROBUST_PLAY
|
|
|
500 signal (SIGPIPE, old_sigpipe);
|
|
|
501 #endif
|
|
|
502 return 0;
|
|
|
503 }
|
|
|
504
|
|
|
505 #ifndef CACHE_SOUNDS
|
|
|
506 sounds_in_play++;
|
|
|
507 AuSoundPlayFromData (aud,
|
|
|
508 s,
|
|
|
509 data+offset,
|
|
|
510 AuNone,
|
|
|
511 AuFixedPointFromFraction (volume,100),
|
|
|
512 doneCB, (AuPointer) &sounds_in_play,
|
|
|
513 NULL,
|
|
|
514 NULL,
|
|
|
515 NULL,
|
|
|
516 NULL);
|
|
|
517 #else
|
|
|
518 /* Cache the sounds in buckets on the server */
|
|
|
519
|
|
|
520 {
|
|
|
521 do_caching_play (s, volume, data+offset);
|
|
|
522 }
|
|
|
523 #endif /* CACHE_SOUNDS */
|
|
|
524
|
|
|
525
|
|
|
526 #ifndef XTEVENTS
|
|
|
527 wait_for_sounds ();
|
|
|
528 #else
|
|
|
529 if (!NILP (Vsynchronous_sounds))
|
|
|
530 {
|
|
|
531 wait_for_sounds ();
|
|
|
532 }
|
|
|
533 #endif
|
|
|
534
|
|
|
535 SoundCloseFile (s);
|
|
|
536
|
|
|
537 #ifdef ROBUST_PLAY
|
|
|
538 signal (SIGPIPE, old_sigpipe);
|
|
|
539 #endif
|
|
|
540
|
|
|
541 return 1;
|
|
|
542 }
|
|
|
543
|
|
|
544 #if defined (ROBUST_PLAY)
|
|
|
545
|
|
|
546 /********************************************************************\
|
|
|
547 * *
|
|
|
548 * Code to protect the client from server shutdowns. *
|
|
|
549 * *
|
|
|
550 * This is unbelievably horrible. *
|
|
|
551 * *
|
|
|
552 \********************************************************************/
|
|
|
553
|
|
|
554 static AuBool
|
|
|
555 CatchIoErrorAndJump (AuServer *old_aud)
|
|
|
556 {
|
|
|
557 if (old_aud)
|
|
|
558 warn ("Audio Server connection broken");
|
|
|
559 else
|
|
|
560 warn ("Audio Server connection broken because of signal");
|
|
|
561
|
|
|
562 #ifdef XTEVENTS
|
|
|
563 #ifdef XTOOLKIT
|
|
|
564 {
|
|
|
565 AuXtAppRemoveAudioHandler (aud, input_id);
|
|
|
566 }
|
|
|
567 #endif
|
|
|
568
|
|
|
569 if (aud)
|
|
|
570 AuCloseServer (aud);
|
|
|
571 aud = NULL;
|
|
|
572 sounds_in_play = 0;
|
|
|
573
|
|
|
574 longjmp (AuXtErrorJump, 1);
|
|
|
575
|
|
|
576 #else /* not XTEVENTS */
|
|
|
577
|
|
|
578 if (aud)
|
|
|
579 AuCloseServer (aud);
|
|
|
580 aud = NULL;
|
|
|
581 sounds_in_play = 0;
|
|
|
582 longjmp (AuXtErrorJump, 1);
|
|
|
583
|
|
|
584 #endif /* XTEVENTS */
|
|
375
|
585 return 0;
|
|
0
|
586 }
|
|
|
587
|
|
|
588 SIGTYPE
|
|
|
589 sigpipe_handle (int signo)
|
|
|
590 {
|
|
|
591 CatchIoErrorAndJump (NULL);
|
|
|
592 }
|
|
|
593
|
|
|
594 static AuBool
|
|
|
595 CatchErrorAndJump (AuServer *old_aud,
|
|
|
596 AuErrorEvent *event)
|
|
|
597 {
|
|
|
598 return CatchIoErrorAndJump (old_aud);
|
|
|
599 }
|
|
|
600
|
|
|
601 #endif /* ROBUST_PLAY */
|
|
|
602
|
|
|
603 /********************************************************************\
|
|
|
604 * *
|
|
|
605 * This code is here because the nas Sound library doesn't *
|
|
|
606 * support playing from a file buffered in memory. It's a fairly *
|
|
|
607 * direct translation of the file-based equivalent. *
|
|
|
608 * *
|
|
|
609 * Since we don't have a filename, samples with no comment field *
|
|
|
610 * are named by a section of their content. *
|
|
|
611 * *
|
|
|
612 \********************************************************************/
|
|
|
613
|
|
|
614 /* Create a name from the sound. */
|
|
|
615
|
|
|
616 static char *
|
|
|
617 NameFromData (CONST unsigned char *buf,
|
|
|
618 int len)
|
|
|
619
|
|
|
620 {
|
|
|
621 unsigned char name[9];
|
|
|
622 int i;
|
|
|
623 char *s;
|
|
|
624
|
|
|
625 buf+=len/2;
|
|
|
626 len -= len/2;
|
|
|
627
|
|
|
628 i=0;
|
|
|
629 while (i<8 && len >0)
|
|
|
630 {
|
|
|
631 while (*buf < 32 && len>0)
|
|
|
632 {
|
|
|
633 buf++;
|
|
|
634 len--;
|
|
|
635 }
|
|
|
636 name[i]= *buf;
|
|
|
637 i++;
|
|
|
638 buf++;
|
|
|
639 len--;
|
|
|
640 }
|
|
|
641
|
|
|
642 name[i]='\0';
|
|
|
643
|
|
|
644 if (i==8)
|
|
|
645 {
|
|
|
646 strcpy (s=malloc (10), name);
|
|
|
647 }
|
|
|
648 else
|
|
|
649 {
|
|
|
650 strcpy (s=malloc (15), "short sound");
|
|
|
651 }
|
|
|
652
|
|
|
653 return s;
|
|
|
654 }
|
|
|
655
|
|
|
656 /* Code to do a pseudo-open on a data buffer. Only for snd files at the
|
|
|
657 moment.
|
|
|
658 */
|
|
|
659
|
|
|
660 static SndInfo *
|
|
|
661 SndOpenDataForReading (CONST char *data,
|
|
|
662 int length)
|
|
|
663
|
|
|
664 {
|
|
|
665 SndInfo *si;
|
|
|
666 int size;
|
|
|
667
|
|
|
668 if (!(si = (SndInfo *) malloc (sizeof (SndInfo))))
|
|
|
669 return NULL;
|
|
|
670
|
|
|
671 si->comment = NULL;
|
|
|
672 si->writing = 0;
|
|
|
673
|
|
|
674 memcpy (&si->h, data, sizeof (SndHeader));
|
|
|
675
|
|
371
|
676 if (LITTLE_ENDIAN)
|
|
0
|
677 {
|
|
|
678 char n;
|
|
|
679
|
|
|
680 swapl (&si->h.magic, n);
|
|
|
681 swapl (&si->h.dataOffset, n);
|
|
|
682 swapl (&si->h.dataSize, n);
|
|
|
683 swapl (&si->h.format, n);
|
|
|
684 swapl (&si->h.sampleRate, n);
|
|
|
685 swapl (&si->h.tracks, n);
|
|
|
686 }
|
|
|
687
|
|
|
688 if (si->h.magic != SND_MAGIC_NUM)
|
|
|
689 {
|
|
|
690 free (si);
|
|
|
691 return NULL;
|
|
|
692 }
|
|
|
693
|
|
|
694 size = si->h.dataOffset - sizeof (SndHeader);
|
|
|
695
|
|
|
696 if (size)
|
|
|
697 {
|
|
|
698 if (!(si->comment = (char *) malloc (size + 1)))
|
|
|
699 {
|
|
|
700 free (si);
|
|
|
701 return NULL;
|
|
|
702 }
|
|
|
703
|
|
|
704 memcpy (si->comment, data+sizeof (SndHeader), size);
|
|
|
705
|
|
|
706 *(si->comment + size) = 0;
|
|
|
707 if (*si->comment == '\0')
|
|
|
708 si->comment =
|
|
|
709 NameFromData (data+si->h.dataOffset, length-si->h.dataOffset);
|
|
|
710 }
|
|
|
711 else
|
|
|
712 si->comment = NameFromData (data+si->h.dataOffset, length-si->h.dataOffset);
|
|
|
713
|
|
|
714 si->h.dataSize = length-si->h.dataOffset;
|
|
|
715
|
|
|
716 si->fp=NULL;
|
|
|
717
|
|
|
718 return si;
|
|
|
719 }
|
|
|
720
|
|
375
|
721 /* Stuff taken from wave.c from NAS. Just like snd files, NAS can't
|
|
|
722 read wave data from memory, so these functions do that for us. */
|
|
|
723
|
|
|
724 #define Err() { return NULL; }
|
|
|
725 #define readFourcc(_f) dread(_f, sizeof(RIFF_FOURCC), 1)
|
|
|
726 #define cmpID(_x, _y) \
|
|
|
727 strncmp((char *) (_x), (char *) (_y), sizeof(RIFF_FOURCC))
|
|
|
728 #define PAD2(_x) (((_x) + 1) & ~1)
|
|
|
729
|
|
|
730 /* These functions here are for faking file I/O from buffer. */
|
|
|
731
|
|
|
732 /* The "file" position */
|
|
|
733 static int file_posn;
|
|
|
734 /* The length of the "file" */
|
|
|
735 static int file_len;
|
|
|
736 /* The actual "file" data. */
|
|
|
737 CONST static char* file_data;
|
|
|
738
|
|
|
739 /* Like fopen, but for a buffer in memory */
|
|
|
740 static void
|
|
|
741 dopen(CONST char* data, int length)
|
|
|
742 {
|
|
|
743 file_data = data;
|
|
|
744 file_len = length;
|
|
|
745 file_posn = 0;
|
|
|
746 }
|
|
|
747
|
|
|
748 /* Like fread, but for a buffer in memory */
|
|
|
749 static int
|
|
|
750 dread(char* buf, int size, int nitems)
|
|
|
751 {
|
|
|
752 int nread;
|
|
|
753
|
|
|
754 nread = size * nitems;
|
|
|
755
|
|
|
756 if (file_posn + nread <= file_len)
|
|
|
757 {
|
|
|
758 memcpy(buf, file_data + file_posn, size * nitems);
|
|
|
759 file_posn += nread;
|
|
|
760 return nitems;
|
|
|
761 }
|
|
|
762 else
|
|
|
763 {
|
|
|
764 return EOF;
|
|
|
765 }
|
|
|
766 }
|
|
|
767
|
|
|
768 /* Like fgetc, but for a buffer in memory */
|
|
|
769 static int
|
|
|
770 dgetc()
|
|
|
771 {
|
|
|
772 int ch;
|
|
|
773
|
|
|
774 if (file_posn < file_len)
|
|
|
775 return file_data[file_posn++];
|
|
|
776 else
|
|
|
777 return -1;
|
|
|
778 }
|
|
|
779
|
|
|
780 /* Like fseek, but for a buffer in memory */
|
|
|
781 static int
|
|
|
782 dseek(long offset, int from)
|
|
|
783 {
|
|
|
784 if (from == 0)
|
|
|
785 file_posn = offset;
|
|
|
786 else if (from == 1)
|
|
|
787 file_posn += offset;
|
|
|
788 else if (from == 2)
|
|
|
789 file_posn = file_len + offset;
|
|
|
790
|
|
|
791 return 0;
|
|
|
792 }
|
|
|
793
|
|
|
794 /* Like ftell, but for a buffer in memory */
|
|
|
795 static int
|
|
|
796 dtell()
|
|
|
797 {
|
|
|
798 return file_posn;
|
|
|
799 }
|
|
|
800
|
|
|
801 /* Data buffer analogs for FileReadS and FileReadL in NAS. */
|
|
|
802
|
|
|
803 static unsigned short
|
|
|
804 DataReadS(int swapit)
|
|
|
805 {
|
|
|
806 unsigned short us;
|
|
|
807
|
|
|
808 dread(&us, 2, 1);
|
|
|
809 if (swapit)
|
|
|
810 us = FileSwapS(us);
|
|
|
811 return us;
|
|
|
812 }
|
|
|
813
|
|
|
814 static AuUint32
|
|
|
815 DataReadL(int swapit)
|
|
|
816 {
|
|
|
817 AuUint32 ul;
|
|
|
818
|
|
|
819 dread(&ul, 4, 1);
|
|
|
820 if (swapit)
|
|
|
821 ul = FileSwapL(ul);
|
|
|
822 return ul;
|
|
|
823 }
|
|
|
824
|
|
|
825 static int
|
|
|
826 readChunk(RiffChunk *c)
|
|
|
827 {
|
|
|
828 int status;
|
|
|
829 char n;
|
|
|
830
|
|
|
831 if ((status = dread(c, sizeof(RiffChunk), 1)))
|
|
|
832 if (BIG_ENDIAN)
|
|
|
833 swapl(&c->ckSize, n);
|
|
|
834
|
|
|
835 return status;
|
|
|
836 }
|
|
|
837
|
|
|
838 /* A very straight-forward translation of WaveOpenFileForReading to
|
|
|
839 read the wave data from a buffer in memory. */
|
|
|
840
|
|
|
841 static WaveInfo *
|
|
|
842 WaveOpenDataForReading(CONST char *data,
|
|
|
843 int length)
|
|
|
844 {
|
|
|
845 RiffChunk ck;
|
|
|
846 RIFF_FOURCC fourcc;
|
|
|
847 AuInt32 fileSize;
|
|
|
848 WaveInfo *wi;
|
|
|
849
|
|
|
850
|
|
|
851 if (!(wi = (WaveInfo *) malloc(sizeof(WaveInfo))))
|
|
|
852 return NULL;
|
|
|
853
|
|
|
854 wi->comment = NULL;
|
|
|
855 wi->dataOffset = wi->format = wi->writing = 0;
|
|
|
856
|
|
|
857 dopen(data, length);
|
|
|
858
|
|
|
859 if (!readChunk(&ck) ||
|
|
|
860 cmpID(&ck.ckID, RIFF_RiffID) ||
|
|
|
861 !readFourcc(&fourcc) ||
|
|
|
862 cmpID(&fourcc, RIFF_WaveID))
|
|
|
863 Err();
|
|
|
864
|
|
|
865 fileSize = PAD2(ck.ckSize) - sizeof(RIFF_FOURCC);
|
|
|
866
|
|
|
867 while (fileSize >= sizeof(RiffChunk))
|
|
|
868 {
|
|
|
869 if (!readChunk(&ck))
|
|
|
870 Err();
|
|
|
871
|
|
|
872 fileSize -= sizeof(RiffChunk) + PAD2(ck.ckSize);
|
|
|
873
|
|
|
874 /* LIST chunk */
|
|
|
875 if (!cmpID(&ck.ckID, RIFF_ListID))
|
|
|
876 {
|
|
|
877 if (!readFourcc(&fourcc))
|
|
|
878 Err();
|
|
|
879
|
|
|
880 /* INFO chunk */
|
|
|
881 if (!cmpID(&fourcc, RIFF_ListInfoID))
|
|
|
882 {
|
|
|
883 ck.ckSize -= sizeof(RIFF_FOURCC);
|
|
|
884
|
|
|
885 while (ck.ckSize)
|
|
|
886 {
|
|
|
887 RiffChunk c;
|
|
|
888
|
|
|
889 if (!readChunk(&c))
|
|
|
890 Err();
|
|
|
891
|
|
|
892 /* ICMT chunk */
|
|
|
893 if (!cmpID(&c.ckID, RIFF_InfoIcmtID))
|
|
|
894 {
|
|
|
895 if (!(wi->comment = (char *) malloc(c.ckSize)) ||
|
|
|
896 !dread(wi->comment, c.ckSize, 1))
|
|
|
897 Err();
|
|
|
898
|
|
|
899 if (c.ckSize & 1)
|
|
|
900 dgetc(); /* eat the pad byte */
|
|
|
901 }
|
|
|
902 else
|
|
|
903 /* skip unknown chunk */
|
|
|
904 dseek(PAD2(c.ckSize), 1);
|
|
|
905
|
|
|
906 ck.ckSize -= sizeof(RiffChunk) + PAD2(c.ckSize);
|
|
|
907 }
|
|
|
908 }
|
|
|
909 else
|
|
|
910 /* skip unknown chunk */
|
|
|
911 dseek(PAD2(ck.ckSize) - sizeof(RIFF_FOURCC), 1);
|
|
|
912 }
|
|
|
913 /* wave format chunk */
|
|
|
914 else if (!cmpID(&ck.ckID, RIFF_WaveFmtID) && !wi->format)
|
|
|
915 {
|
|
|
916 AuInt32 dummy;
|
|
|
917
|
|
|
918 wi->format = DataReadS(BIG_ENDIAN);
|
|
|
919 wi->channels = DataReadS(BIG_ENDIAN);
|
|
|
920 wi->sampleRate = DataReadL(BIG_ENDIAN);
|
|
|
921
|
|
|
922 /* we don't care about the next two fields */
|
|
|
923 dummy = DataReadL(BIG_ENDIAN);
|
|
|
924 dummy = DataReadS(BIG_ENDIAN);
|
|
|
925
|
|
|
926 if (wi->format != RIFF_WAVE_FORMAT_PCM)
|
|
|
927 Err();
|
|
|
928
|
|
|
929 wi->bitsPerSample = DataReadS(BIG_ENDIAN);
|
|
|
930
|
|
|
931 /* skip any other format specific fields */
|
|
|
932 dseek(PAD2(ck.ckSize - 16), 1);
|
|
|
933 }
|
|
|
934 /* wave data chunk */
|
|
|
935 else if (!cmpID(&ck.ckID, RIFF_WaveDataID) && !wi->dataOffset)
|
|
|
936 {
|
|
|
937 long endOfFile;
|
|
|
938
|
|
|
939 wi->dataOffset = dtell();
|
|
|
940 wi->dataSize = ck.ckSize;
|
|
|
941 dseek(0, 2);
|
|
|
942 endOfFile = dtell();
|
|
|
943
|
|
|
944 /* seek past the data */
|
|
|
945 if (dseek(wi->dataOffset + PAD2(ck.ckSize), 0) ||
|
|
|
946 dtell() > endOfFile)
|
|
|
947 {
|
|
|
948 /* the seek failed, assume the size is bogus */
|
|
|
949 dseek(0, 2);
|
|
|
950 wi->dataSize = dtell() - wi->dataOffset;
|
|
|
951 }
|
|
|
952
|
|
|
953 wi->dataOffset -= sizeof(long);
|
|
|
954 }
|
|
|
955 else
|
|
|
956 /* skip unknown chunk */
|
|
|
957 dseek(PAD2(ck.ckSize), 1);
|
|
|
958 }
|
|
|
959
|
|
|
960 if (!wi->dataOffset)
|
|
|
961 Err();
|
|
|
962
|
|
|
963 wi->numSamples = wi->dataSize / wi->channels / (wi->bitsPerSample >> 3);
|
|
|
964
|
|
|
965 if (!wi->comment)
|
|
|
966 wi->comment = NameFromData (data + wi->dataOffset,
|
|
|
967 length - wi->dataOffset);
|
|
|
968
|
|
|
969 wi->fp = NULL;
|
|
|
970
|
|
|
971 return wi;
|
|
|
972 }
|
|
|
973
|
|
|
974
|
|
0
|
975 static Sound
|
|
|
976 SoundOpenDataForReading (unsigned char *data,
|
|
|
977 int length)
|
|
|
978
|
|
|
979 {
|
|
|
980 Sound s;
|
|
|
981
|
|
|
982 if (!(s = (Sound) malloc (sizeof (SoundRec))))
|
|
|
983 return NULL;
|
|
|
984
|
|
375
|
985 if ((s->formatInfo = SndOpenDataForReading (data, length)) != NULL)
|
|
0
|
986 {
|
|
375
|
987 if (!(SoundFileInfo[SoundFileFormatSnd].toSound) (s))
|
|
|
988 {
|
|
|
989 SndCloseFile (s->formatInfo);
|
|
|
990 free (s);
|
|
|
991 return NULL;
|
|
|
992 }
|
|
0
|
993 }
|
|
375
|
994 else if ((s->formatInfo = WaveOpenDataForReading (data, length)) != NULL)
|
|
0
|
995 {
|
|
375
|
996 if (!(SoundFileInfo[SoundFileFormatWave].toSound) (s))
|
|
|
997 {
|
|
|
998 WaveCloseFile (s->formatInfo);
|
|
|
999 free (s);
|
|
|
1000 return NULL;
|
|
|
1001 }
|
|
0
|
1002 }
|
|
|
1003
|
|
|
1004 return s;
|
|
|
1005 }
|
|
|
1006
|
