annotate decoders/modplug.c @ 348:4b46cf359136

Updated.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 23 May 2002 12:51:01 +0000
parents 498240aa76f1
children f72fd79d6e76
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 * Please see the file COPYING in the source's root directory.
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24 *
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25 * This file written by Torbjörn Andersson (d91tan@Update.UU.SE)
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26 */
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27
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28 #if HAVE_CONFIG_H
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29 # include <config.h>
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30 #endif
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31
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32 #ifdef SOUND_SUPPORTS_MODPLUG
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33
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34 #include <stdio.h>
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35 #include <stdlib.h>
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36 #include <string.h>
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37 #include <assert.h>
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38
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39 #include "SDL_sound.h"
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40
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41 #define __SDL_SOUND_INTERNAL__
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42 #include "SDL_sound_internal.h"
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43
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44 #include "modplug.h"
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45
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46
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47 static int MODPLUG_init(void);
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48 static void MODPLUG_quit(void);
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49 static int MODPLUG_open(Sound_Sample *sample, const char *ext);
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50 static void MODPLUG_close(Sound_Sample *sample);
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51 static Uint32 MODPLUG_read(Sound_Sample *sample);
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52 static int MODPLUG_rewind(Sound_Sample *sample);
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53 static int MODPLUG_seek(Sound_Sample *sample, Uint32 ms);
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54
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55 static const char *extensions_modplug[] =
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56 {
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57 /* The XMMS plugin is apparently able to load compressed modules as
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58 * well, but libmodplug does not handle this.
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59 */
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60 "669", /* Composer 669 / UNIS 669 module */
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61 "AMF", /* ASYLUM Music Format / Advanced Music Format(DSM) */
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62 "AMS", /* AMS module */
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63 "DBM", /* DigiBooster Pro Module */
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64 "DMF", /* DMF DELUSION DIGITAL MUSIC FILEFORMAT (X-Tracker) */
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65 "DSM", /* DSIK Internal Format module */
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66 "FAR", /* Farandole module */
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67 "IT", /* Impulse Tracker IT file */
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68 "MDL", /* DigiTracker module */
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69 #if 0
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70 "J2B", /* Not implemented? What is it anyway? */
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71 #endif
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72 "MED", /* OctaMed MED file */
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73 "MOD", /* ProTracker / NoiseTracker MOD/NST file */
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74 "MT2", /* MadTracker 2.0 */
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75 "MTM", /* MTM file */
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76 "OKT", /* Oktalyzer module */
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77 "PTM", /* PTM PolyTracker module */
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78 "PSM", /* PSM module */
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79 "S3M", /* ScreamTracker file */
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80 "STM", /* ST 2.xx */
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81 "ULT",
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82 "UMX",
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83 "XM", /* FastTracker II */
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84 NULL
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85 };
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86
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87 const Sound_DecoderFunctions __Sound_DecoderFunctions_MODPLUG =
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88 {
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89 {
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90 extensions_modplug,
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91 "Play modules through ModPlug",
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92 "Torbjörn Andersson <d91tan@Update.UU.SE>",
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93 "http://modplug-xmms.sourceforge.net/"
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94 },
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95
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96 MODPLUG_init, /* init() method */
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97 MODPLUG_quit, /* quit() method */
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98 MODPLUG_open, /* open() method */
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99 MODPLUG_close, /* close() method */
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100 MODPLUG_read, /* read() method */
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101 MODPLUG_rewind, /* rewind() method */
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102 MODPLUG_seek /* seek() method */
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103 };
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104
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105
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106 static int MODPLUG_init(void)
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107 {
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108 ModPlug_Settings settings;
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109
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110 /* The settings will require some experimenting. I've borrowed some
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111 * of them from the XMMS ModPlug plugin.
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112 */
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113 settings.mFlags =
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114 MODPLUG_ENABLE_OVERSAMPLING
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115 | MODPLUG_ENABLE_NOISE_REDUCTION
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116 | MODPLUG_ENABLE_REVERB
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117 | MODPLUG_ENABLE_MEGABASS
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118 | MODPLUG_ENABLE_SURROUND;
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119 settings.mChannels = 2;
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120 settings.mBits = 16;
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121 settings.mFrequency = 44100;
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122 settings.mResamplingMode = MODPLUG_RESAMPLE_FIR;
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123 settings.mReverbDepth = 30;
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124 settings.mReverbDelay = 100;
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125 settings.mBassAmount = 40;
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126 settings.mBassRange = 30;
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127 settings.mSurroundDepth = 20;
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128 settings.mSurroundDelay = 20;
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129 settings.mLoopCount = 0;
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130
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131 ModPlug_SetSettings(&settings);
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132 return(1); /* success. */
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133 } /* MODPLUG_init */
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134
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135
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136 static void MODPLUG_quit(void)
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137 {
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138 /* it's a no-op. */
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139 } /* MODPLUG_quit */
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140
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141
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142 /*
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143 * Most MOD files I've seen have tended to be a few hundred KB, even if some
208
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144 * of them were much smaller than that.
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145 */
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146 #define CHUNK_SIZE 65536
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147
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148 static int MODPLUG_open(Sound_Sample *sample, const char *ext)
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149 {
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150 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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151 ModPlugFile *module;
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152 Uint8 *data;
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153 size_t size;
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154 Uint32 retval;
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155 int has_extension = 0;
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156 int i;
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157
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158 /*
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159 * Apparently ModPlug's loaders are too forgiving. They gladly accept
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160 * streams that they shouldn't. For now, rely on file extension instead.
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161 */
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162 for (i = 0; extensions_modplug[i] != NULL; i++)
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163 {
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164 if (__Sound_strcasecmp(ext, extensions_modplug[i]) == 0)
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165 {
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166 has_extension = 1;
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167 break;
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168 } /* if */
211
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169 } /* for */
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170
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171 if (!has_extension)
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172 {
221
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173 SNDDBG(("MODPLUG: Unrecognized file type: %s\n", ext));
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174 Sound_SetError("MODPLUG: Not a module file.");
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175 return(0);
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176 } /* if */
211
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177
208
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178 /* ModPlug needs the entire stream in one big chunk. I don't like it,
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179 * but I don't think there's any way around it.
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180 */
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181 data = (Uint8 *) malloc(CHUNK_SIZE);
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182 BAIL_IF_MACRO(data == NULL, ERR_OUT_OF_MEMORY, 0);
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183 size = 0;
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184
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185 do
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186 {
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187 retval = SDL_RWread(internal->rw, &data[size], 1, CHUNK_SIZE);
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188 size += retval;
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189 if (retval == CHUNK_SIZE)
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190 {
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191 data = (Uint8 *) realloc(data, size + CHUNK_SIZE);
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192 BAIL_IF_MACRO(data == NULL, ERR_OUT_OF_MEMORY, 0);
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193 } /* if */
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194 } while (retval > 0);
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195
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196 /* The buffer may be a bit too large, but that doesn't matter. I think
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197 * it's safe to free it as soon as ModPlug_Load() is finished anyway.
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198 */
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199 module = ModPlug_Load((void *) data, size);
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200 free(data);
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201 BAIL_IF_MACRO(module == NULL, "MODPLUG: Not a module file.", 0);
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202
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203 SNDDBG(("MODPLUG: [%d ms] %s\n",
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204 ModPlug_GetLength(module), ModPlug_GetName(module)));
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205
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206 sample->actual.channels = 2;
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207 sample->actual.rate = 44100;
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208 sample->actual.format = AUDIO_S16SYS;
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209
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210 internal->decoder_private = (void *) module;
312
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211 sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
208
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212
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213 SNDDBG(("MODPLUG: Accepting data stream\n"));
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214 return(1); /* we'll handle this data. */
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215 } /* MODPLUG_open */
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216
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217
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218 static void MODPLUG_close(Sound_Sample *sample)
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219 {
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220 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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221 ModPlugFile *module = (ModPlugFile *) internal->decoder_private;
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222
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223 ModPlug_Unload(module);
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224 } /* MODPLUG_close */
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225
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226
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227 static Uint32 MODPLUG_read(Sound_Sample *sample)
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228 {
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229 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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230 ModPlugFile *module = (ModPlugFile *) internal->decoder_private;
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231 int retval;
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232
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233 retval = ModPlug_Read(module, internal->buffer, internal->buffer_size);
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234 if (retval == 0)
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235 sample->flags |= SOUND_SAMPLEFLAG_EOF;
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236 return(retval);
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237 } /* MODPLUG_read */
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238
221
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239
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240 static int MODPLUG_rewind(Sound_Sample *sample)
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241 {
231
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242 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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243 ModPlugFile *module = (ModPlugFile *) internal->decoder_private;
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244
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245 ModPlug_Seek(module, 0);
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246 return(1);
221
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247 } /* MODPLUG_rewind */
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248
306
c97be6e1bd27 Added framework for Sound_Seek() support.
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249
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250 static int MODPLUG_seek(Sound_Sample *sample, Uint32 ms)
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251 {
312
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252 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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253 ModPlugFile *module = (ModPlugFile *) internal->decoder_private;
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254
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255 /* Assume that this will work. */
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256 ModPlug_Seek(module, ms);
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257 return(1);
306
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258 } /* MODPLUG_seek */
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259
208
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260 #endif /* SOUND_SUPPORTS_MODPLUG */
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261
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262
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263 /* end of modplug.c ... */