annotate decoders/modplug.c @ 395:53ce18591f5d

Mutex'd a potential race condition.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 11 Jul 2002 04:56:08 +0000
parents fb519e6028e3
children c66080364dff d0d381a6f2bb
rev   line source
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1 /*
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2 * SDL_sound -- An abstract sound format decoding API.
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3 * Copyright (C) 2001 Ryan C. Gordon.
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4 *
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5 * This library is free software; you can redistribute it and/or
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6 * modify it under the terms of the GNU Lesser General Public
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7 * License as published by the Free Software Foundation; either
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8 * version 2.1 of the License, or (at your option) any later version.
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9 *
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10 * This library is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 * Lesser General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU Lesser General Public
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16 * License along with this library; if not, write to the Free Software
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17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18 */
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19
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20 /*
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21 * Module player for SDL_sound. This driver handles anything that ModPlug does.
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22 *
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23 * ModPlug can be found at http://sourceforge.net/projects/modplug-xmms
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24 *
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25 * An unofficial version of modplug with all C++ dependencies removed is also
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26 * available: http://freecraft.net/snapshots/
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27 * (Look for something like "libmodplug-johns-*.tar.gz")
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28 *
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29 * Please see the file COPYING in the source's root directory.
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30 *
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31 * This file written by Torbjörn Andersson (d91tan@Update.UU.SE)
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32 */
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33
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34 #if HAVE_CONFIG_H
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35 # include <config.h>
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36 #endif
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37
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38 #ifdef SOUND_SUPPORTS_MODPLUG
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39
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40 #include <stdio.h>
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41 #include <stdlib.h>
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42 #include <string.h>
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43
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44 #include "SDL_sound.h"
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45
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46 #define __SDL_SOUND_INTERNAL__
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47 #include "SDL_sound_internal.h"
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48
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49 #include "modplug.h"
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50
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51
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52 static int MODPLUG_init(void);
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53 static void MODPLUG_quit(void);
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54 static int MODPLUG_open(Sound_Sample *sample, const char *ext);
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55 static void MODPLUG_close(Sound_Sample *sample);
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56 static Uint32 MODPLUG_read(Sound_Sample *sample);
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57 static int MODPLUG_rewind(Sound_Sample *sample);
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58 static int MODPLUG_seek(Sound_Sample *sample, Uint32 ms);
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59
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60 static const char *extensions_modplug[] =
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61 {
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62 /* The XMMS plugin is apparently able to load compressed modules as
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63 * well, but libmodplug does not handle this.
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64 */
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65 "669", /* Composer 669 / UNIS 669 module */
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66 "AMF", /* ASYLUM Music Format / Advanced Music Format(DSM) */
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67 "AMS", /* AMS module */
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68 "DBM", /* DigiBooster Pro Module */
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69 "DMF", /* DMF DELUSION DIGITAL MUSIC FILEFORMAT (X-Tracker) */
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70 "DSM", /* DSIK Internal Format module */
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71 "FAR", /* Farandole module */
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72 "IT", /* Impulse Tracker IT file */
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73 "MDL", /* DigiTracker module */
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74 #if 0
211
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75 "J2B", /* Not implemented? What is it anyway? */
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76 #endif
211
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77 "MED", /* OctaMed MED file */
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78 "MOD", /* ProTracker / NoiseTracker MOD/NST file */
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79 "MT2", /* MadTracker 2.0 */
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80 "MTM", /* MTM file */
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81 "OKT", /* Oktalyzer module */
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82 "PTM", /* PTM PolyTracker module */
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83 "PSM", /* PSM module */
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84 "S3M", /* ScreamTracker file */
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85 "STM", /* ST 2.xx */
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86 "ULT",
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87 "UMX",
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88 "XM", /* FastTracker II */
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89 NULL
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90 };
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91
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92 const Sound_DecoderFunctions __Sound_DecoderFunctions_MODPLUG =
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93 {
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94 {
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95 extensions_modplug,
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96 "Play modules through ModPlug",
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97 "Torbjörn Andersson <d91tan@Update.UU.SE>",
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98 "http://modplug-xmms.sourceforge.net/"
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99 },
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100
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101 MODPLUG_init, /* init() method */
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102 MODPLUG_quit, /* quit() method */
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103 MODPLUG_open, /* open() method */
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104 MODPLUG_close, /* close() method */
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105 MODPLUG_read, /* read() method */
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106 MODPLUG_rewind, /* rewind() method */
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107 MODPLUG_seek /* seek() method */
208
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108 };
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109
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110
376
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111 static ModPlug_Settings settings;
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112 static Sound_AudioInfo current_audioinfo;
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113 static unsigned int total_mods_decoding = 0;
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114 static SDL_mutex *modplug_mutex = NULL;
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115
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116 static int MODPLUG_init(void)
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117 {
395
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118 assert(modplug_mutex == NULL);
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119
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120 /*
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121 * The settings will require some experimenting. I've borrowed some
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122 * of them from the XMMS ModPlug plugin.
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123 */
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124 settings.mFlags = MODPLUG_ENABLE_OVERSAMPLING;
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125
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126 #ifndef _WIN32_WCE
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127 settings.mFlags |= MODPLUG_ENABLE_NOISE_REDUCTION |
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128 MODPLUG_ENABLE_REVERB |
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129 MODPLUG_ENABLE_MEGABASS |
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130 MODPLUG_ENABLE_SURROUND;
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131
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132 settings.mReverbDepth = 30;
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133 settings.mReverbDelay = 100;
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134 settings.mBassAmount = 40;
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135 settings.mBassRange = 30;
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136 settings.mSurroundDepth = 20;
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137 settings.mSurroundDelay = 20;
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138 #endif
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139
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140 settings.mChannels = 2;
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141 settings.mBits = 16;
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142 settings.mFrequency = 44100;
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143 settings.mResamplingMode = MODPLUG_RESAMPLE_FIR;
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144 settings.mLoopCount = 0;
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145
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146 current_audioinfo.channels = 2;
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147 current_audioinfo.rate = 44100;
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148 current_audioinfo.format = AUDIO_S16SYS;
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149 total_mods_decoding = 0;
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150
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151 modplug_mutex = SDL_CreateMutex();
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152
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153 ModPlug_SetSettings(&settings);
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154 return(1); /* success. */
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155 } /* MODPLUG_init */
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156
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157
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158 static void MODPLUG_quit(void)
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159 {
376
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diff changeset
160 assert(total_mods_decoding == 0);
395
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diff changeset
161
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diff changeset
162 if (modplug_mutex != NULL)
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diff changeset
163 {
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diff changeset
164 SDL_DestroyMutex(modplug_mutex);
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diff changeset
165 modplug_mutex = NULL;
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166 } /* if */
208
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167 } /* MODPLUG_quit */
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168
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diff changeset
169
221
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170 /*
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171 * Most MOD files I've seen have tended to be a few hundred KB, even if some
208
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172 * of them were much smaller than that.
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173 */
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174 #define CHUNK_SIZE 65536
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175
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176 static int MODPLUG_open(Sound_Sample *sample, const char *ext)
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177 {
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178 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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parents:
diff changeset
179 ModPlugFile *module;
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180 Uint8 *data;
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181 size_t size;
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182 Uint32 retval;
211
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183 int has_extension = 0;
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184 int i;
208
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185
221
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diff changeset
186 /*
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187 * Apparently ModPlug's loaders are too forgiving. They gladly accept
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188 * streams that they shouldn't. For now, rely on file extension instead.
211
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189 */
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190 for (i = 0; extensions_modplug[i] != NULL; i++)
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diff changeset
191 {
221
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192 if (__Sound_strcasecmp(ext, extensions_modplug[i]) == 0)
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diff changeset
193 {
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diff changeset
194 has_extension = 1;
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diff changeset
195 break;
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196 } /* if */
211
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197 } /* for */
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198
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199 if (!has_extension)
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diff changeset
200 {
221
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201 SNDDBG(("MODPLUG: Unrecognized file type: %s\n", ext));
387
fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
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202 BAIL_MACRO("MODPLUG: Not a module file.", 0);
221
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diff changeset
203 } /* if */
211
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204
376
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205 /*
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206 * ModPlug needs the entire stream in one big chunk. I don't like it,
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207 * but I don't think there's any way around it.
208
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208 */
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209 data = (Uint8 *) malloc(CHUNK_SIZE);
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210 BAIL_IF_MACRO(data == NULL, ERR_OUT_OF_MEMORY, 0);
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211 size = 0;
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212
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213 do
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214 {
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215 retval = SDL_RWread(internal->rw, &data[size], 1, CHUNK_SIZE);
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216 size += retval;
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217 if (retval == CHUNK_SIZE)
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diff changeset
218 {
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219 data = (Uint8 *) realloc(data, size + CHUNK_SIZE);
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220 BAIL_IF_MACRO(data == NULL, ERR_OUT_OF_MEMORY, 0);
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221 } /* if */
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222 } while (retval > 0);
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223
376
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224 /*
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225 * It's only safe to change these settings when there're
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226 * no other mods being decoded...
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227 */
395
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diff changeset
228 if (modplug_mutex != NULL)
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229 SDL_LockMutex(modplug_mutex);
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230
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231 if (total_mods_decoding > 0)
376
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232 {
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233 /* other mods decoding: use the same settings they are. */
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234 memcpy(&sample->actual, &current_audioinfo, sizeof (Sound_AudioInfo));
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235 } /* if */
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diff changeset
236 else
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diff changeset
237 {
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238 /* no other mods decoding: define the new ModPlug output settings. */
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239 memcpy(&sample->actual, &sample->desired, sizeof (Sound_AudioInfo));
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diff changeset
240 if (sample->actual.rate == 0)
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diff changeset
241 sample->actual.rate = 44100;
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diff changeset
242 if (sample->actual.channels == 0)
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diff changeset
243 sample->actual.channels = 2;
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diff changeset
244 if (sample->actual.format == 0)
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diff changeset
245 sample->actual.format = AUDIO_S16SYS;
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diff changeset
246
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diff changeset
247 memcpy(&current_audioinfo, &sample->actual, sizeof (Sound_AudioInfo));
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diff changeset
248 settings.mChannels=sample->actual.channels;
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diff changeset
249 settings.mFrequency=sample->actual.rate;
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diff changeset
250 settings.mBits = sample->actual.format & 0xFF;
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diff changeset
251 ModPlug_SetSettings(&settings);
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diff changeset
252 } /* else */
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diff changeset
253
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diff changeset
254 /*
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255 * The buffer may be a bit too large, but that doesn't matter. I think
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diff changeset
256 * it's safe to free it as soon as ModPlug_Load() is finished anyway.
208
32376317eedb Initial adds.
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parents:
diff changeset
257 */
32376317eedb Initial adds.
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diff changeset
258 module = ModPlug_Load((void *) data, size);
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diff changeset
259 free(data);
395
53ce18591f5d Mutex'd a potential race condition.
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diff changeset
260 if (module == NULL)
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diff changeset
261 {
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diff changeset
262 if (modplug_mutex != NULL)
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diff changeset
263 SDL_UnlockMutex(modplug_mutex);
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diff changeset
264
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diff changeset
265 BAIL_MACRO("MODPLUG: Not a module file.", 0);
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diff changeset
266 } /* if */
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diff changeset
267
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diff changeset
268 total_mods_decoding++;
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diff changeset
269
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diff changeset
270 if (modplug_mutex != NULL)
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diff changeset
271 SDL_UnlockMutex(modplug_mutex);
208
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272
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273 SNDDBG(("MODPLUG: [%d ms] %s\n",
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parents:
diff changeset
274 ModPlug_GetLength(module), ModPlug_GetName(module)));
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275
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diff changeset
276 internal->decoder_private = (void *) module;
312
498240aa76f1 Seek implementations.
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diff changeset
277 sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
208
32376317eedb Initial adds.
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parents:
diff changeset
278
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diff changeset
279 SNDDBG(("MODPLUG: Accepting data stream\n"));
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parents:
diff changeset
280 return(1); /* we'll handle this data. */
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diff changeset
281 } /* MODPLUG_open */
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282
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283
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parents:
diff changeset
284 static void MODPLUG_close(Sound_Sample *sample)
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parents:
diff changeset
285 {
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diff changeset
286 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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diff changeset
287 ModPlugFile *module = (ModPlugFile *) internal->decoder_private;
395
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diff changeset
288
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diff changeset
289 if (modplug_mutex != NULL)
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diff changeset
290 SDL_LockMutex(modplug_mutex);
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diff changeset
291
376
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diff changeset
292 total_mods_decoding--;
208
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diff changeset
293
395
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diff changeset
294 if (modplug_mutex != NULL)
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diff changeset
295 SDL_UnlockMutex(modplug_mutex);
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diff changeset
296
208
32376317eedb Initial adds.
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diff changeset
297 ModPlug_Unload(module);
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parents:
diff changeset
298 } /* MODPLUG_close */
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diff changeset
299
32376317eedb Initial adds.
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parents:
diff changeset
300
32376317eedb Initial adds.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
301 static Uint32 MODPLUG_read(Sound_Sample *sample)
32376317eedb Initial adds.
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parents:
diff changeset
302 {
32376317eedb Initial adds.
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parents:
diff changeset
303 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
32376317eedb Initial adds.
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parents:
diff changeset
304 ModPlugFile *module = (ModPlugFile *) internal->decoder_private;
32376317eedb Initial adds.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
305 int retval;
32376317eedb Initial adds.
Ryan C. Gordon <icculus@icculus.org>
parents:
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306
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307 retval = ModPlug_Read(module, internal->buffer, internal->buffer_size);
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308 if (retval == 0)
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309 sample->flags |= SOUND_SAMPLEFLAG_EOF;
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310 return(retval);
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311 } /* MODPLUG_read */
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312
221
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313
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314 static int MODPLUG_rewind(Sound_Sample *sample)
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315 {
231
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316 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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317 ModPlugFile *module = (ModPlugFile *) internal->decoder_private;
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318
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319 ModPlug_Seek(module, 0);
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320 return(1);
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321 } /* MODPLUG_rewind */
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322
306
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323
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324 static int MODPLUG_seek(Sound_Sample *sample, Uint32 ms)
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325 {
312
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326 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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327 ModPlugFile *module = (ModPlugFile *) internal->decoder_private;
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328
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329 /* Assume that this will work. */
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330 ModPlug_Seek(module, ms);
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331 return(1);
306
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332 } /* MODPLUG_seek */
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333
208
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334 #endif /* SOUND_SUPPORTS_MODPLUG */
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335
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336
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337 /* end of modplug.c ... */