annotate decoders/mod.c @ 203:ce6f870ed446

Updated.
author Ryan C. Gordon <icculus@icculus.org>
date Fri, 04 Jan 2002 06:57:03 +0000
parents 47cc2de2ae36
children
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 - through MikMod - for SDL_sound.
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22 *
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23 * This driver handles anything our subset of MikMod handles. It is based on
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24 * SDL_mixer's MikMod music player.
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25 *
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26 * Please see the file COPYING in the source's root directory.
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27 *
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28 * This file written by Torbjörn Andersson (d91tan@Update.UU.SE)
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29 */
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30
106
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31 #if HAVE_CONFIG_H
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32 # include <config.h>
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33 #endif
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34
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35 #ifdef SOUND_SUPPORTS_MOD
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36
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37 #include <stdio.h>
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38 #include <stdlib.h>
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39 #include <string.h>
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40 #include <assert.h>
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41
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42 #include "SDL_sound.h"
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43
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44 #define __SDL_SOUND_INTERNAL__
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45 #include "SDL_sound_internal.h"
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46
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47 #include "mikmod.h"
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48
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49
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50 static int MOD_init(void);
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51 static void MOD_quit(void);
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52 static int MOD_open(Sound_Sample *sample, const char *ext);
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53 static void MOD_close(Sound_Sample *sample);
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54 static Uint32 MOD_read(Sound_Sample *sample);
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55
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56 static const char *extensions_mikmod[] =
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57 {
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58 "MOD", "IT", "XM", "S3M", "MTM", "669", "STM", "ULT",
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59 "FAR", "MED", "AMF", "DSM", "IMF", "GDM", "STX", "OKT",
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60 NULL
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61 };
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62
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63 const Sound_DecoderFunctions __Sound_DecoderFunctions_MOD =
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64 {
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65 {
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66 extensions_mikmod,
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67 "Play modules through MikMod",
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68 "Torbjörn Andersson <d91tan@Update.UU.SE>",
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69 "http://www.mikmod.org/"
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70 },
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71
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72 MOD_init, /* init() method */
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73 MOD_quit, /* quit() method */
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74 MOD_open, /* open() method */
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75 MOD_close, /* close() method */
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76 MOD_read /* read() method */
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77 };
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78
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79 /* this is what we store in our internal->decoder_private field... */
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80 typedef struct {
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81 MODULE *module;
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82 } mod_t;
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83
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84
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85 /* Make MikMod read from a RWops... */
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86
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87 typedef struct MRWOPSREADER {
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88 MREADER core;
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89 Sound_Sample *sample;
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90 int end;
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91 } MRWOPSREADER;
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92
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93 static BOOL _mm_RWopsReader_eof(MREADER *reader)
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94 {
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95 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader;
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96 Sound_Sample *sample = rwops_reader->sample;
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97 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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98 int pos = SDL_RWtell(internal->rw);
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99
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100 if (rwops_reader->end == pos)
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101 return(1);
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102
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103 return(0);
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104 } /* _mm_RWopsReader_eof */
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105
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106
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107 static BOOL _mm_RWopsReader_read(MREADER *reader, void *ptr, size_t size)
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108 {
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109 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader;
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110 Sound_Sample *sample = rwops_reader->sample;
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111 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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112 return(SDL_RWread(internal->rw, ptr, size, 1));
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113 } /* _mm_RWopsReader_Read */
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114
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115
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116 static int _mm_RWopsReader_get(MREADER *reader)
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117 {
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118 char buf;
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119 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader;
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120 Sound_Sample *sample = rwops_reader->sample;
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121 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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122
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123 if (SDL_RWread(internal->rw, &buf, 1, 1) != 1)
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124 return(EOF);
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125
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126 return((int) buf);
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127 } /* _mm_RWopsReader_get */
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128
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129
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130 static BOOL _mm_RWopsReader_seek(MREADER *reader, long offset, int whence)
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131 {
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132 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader;
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133 Sound_Sample *sample = rwops_reader->sample;
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134 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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135
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136 return(SDL_RWseek(internal->rw, offset, whence));
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137 } /* _mm_RWopsReader_seek */
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138
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139
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140 static long _mm_RWopsReader_tell(MREADER *reader)
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141 {
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142 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader;
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143 Sound_Sample *sample = rwops_reader->sample;
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144 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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145
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146 return(SDL_RWtell(internal->rw));
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147 } /* _mm_RWopsReader_tell */
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148
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149
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150 static MREADER *_mm_new_rwops_reader(Sound_Sample *sample)
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151 {
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152 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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153
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154 MRWOPSREADER *reader = (MRWOPSREADER *) malloc(sizeof (MRWOPSREADER));
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155 if (reader != NULL)
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156 {
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157 int here;
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158 reader->core.Eof = _mm_RWopsReader_eof;
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159 reader->core.Read = _mm_RWopsReader_read;
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160 reader->core.Get = _mm_RWopsReader_get;
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161 reader->core.Seek = _mm_RWopsReader_seek;
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162 reader->core.Tell = _mm_RWopsReader_tell;
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163 reader->sample = sample;
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164
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165 /* RWops does not explicitly support an eof check, so we shall find
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166 the end manually - this requires seek support for the RWop */
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167 here = SDL_RWtell(internal->rw);
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168 reader->end = SDL_RWseek(internal->rw, 0, SEEK_END);
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169 SDL_RWseek(internal->rw, here, SEEK_SET); /* Move back */
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parents:
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170 /* !!! FIXME: What happens if the seek fails? */
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171 } /* if */
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Ryan C. Gordon <icculus@icculus.org>
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172
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Ryan C. Gordon <icculus@icculus.org>
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173 return((MREADER *) reader);
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Ryan C. Gordon <icculus@icculus.org>
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174 } /* _mm_new_rwops_reader */
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Ryan C. Gordon <icculus@icculus.org>
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175
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Ryan C. Gordon <icculus@icculus.org>
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176
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Ryan C. Gordon <icculus@icculus.org>
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177 static void _mm_delete_rwops_reader(MREADER *reader)
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Ryan C. Gordon <icculus@icculus.org>
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178 {
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Ryan C. Gordon <icculus@icculus.org>
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179 /* SDL_sound will delete the RWops and sample at a higher level... */
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180 if (reader != NULL)
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Ryan C. Gordon <icculus@icculus.org>
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181 free(reader);
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Ryan C. Gordon <icculus@icculus.org>
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182 } /* _mm_delete_rwops_reader */
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Ryan C. Gordon <icculus@icculus.org>
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183
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Ryan C. Gordon <icculus@icculus.org>
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184
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Ryan C. Gordon <icculus@icculus.org>
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185
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Ryan C. Gordon <icculus@icculus.org>
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186 static int MOD_init(void)
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187 {
52
69d56e196de7 going with MikMod defaults (adds more reverb) and only register the "no
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
188 MikMod_RegisterDriver(&drv_nos);
43
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Ryan C. Gordon <icculus@icculus.org>
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189 MikMod_RegisterAllLoaders();
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Ryan C. Gordon <icculus@icculus.org>
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190
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Ryan C. Gordon <icculus@icculus.org>
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191 /*
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Ryan C. Gordon <icculus@icculus.org>
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192 * Both DMODE_SOFT_MUSIC and DMODE_16BITS should be set by default,
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Ryan C. Gordon <icculus@icculus.org>
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193 * so this is just for clarity. I haven't experimented with any of
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Ryan C. Gordon <icculus@icculus.org>
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194 * the other flags. There are a few which are said to give better
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Ryan C. Gordon <icculus@icculus.org>
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195 * sound quality.
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Ryan C. Gordon <icculus@icculus.org>
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196 */
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197 md_mode |= (DMODE_SOFT_MUSIC | DMODE_16BITS);
120
bd224f22e6b2 Handles sample rate somewhat more robustly.
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diff changeset
198 md_mixfreq = 0;
43
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199
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Ryan C. Gordon <icculus@icculus.org>
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200 BAIL_IF_MACRO(MikMod_Init(""), MikMod_strerror(MikMod_errno), 0);
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Ryan C. Gordon <icculus@icculus.org>
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201
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Ryan C. Gordon <icculus@icculus.org>
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202 return(1); /* success. */
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Ryan C. Gordon <icculus@icculus.org>
parents:
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203 } /* MOD_init */
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Ryan C. Gordon <icculus@icculus.org>
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204
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
205
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Ryan C. Gordon <icculus@icculus.org>
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206 static void MOD_quit(void)
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Ryan C. Gordon <icculus@icculus.org>
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207 {
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Ryan C. Gordon <icculus@icculus.org>
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208 MikMod_Exit();
120
bd224f22e6b2 Handles sample rate somewhat more robustly.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
209 md_mixfreq = 0;
43
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Ryan C. Gordon <icculus@icculus.org>
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210 } /* MOD_quit */
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
211
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Ryan C. Gordon <icculus@icculus.org>
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212
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Ryan C. Gordon <icculus@icculus.org>
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213 static int MOD_open(Sound_Sample *sample, const char *ext)
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Ryan C. Gordon <icculus@icculus.org>
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214 {
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Ryan C. Gordon <icculus@icculus.org>
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215 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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Ryan C. Gordon <icculus@icculus.org>
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216 MREADER *reader;
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
217 mod_t *m;
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
218
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Ryan C. Gordon <icculus@icculus.org>
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219 m = (mod_t *) malloc(sizeof(mod_t));
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Ryan C. Gordon <icculus@icculus.org>
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220 BAIL_IF_MACRO(m == NULL, ERR_OUT_OF_MEMORY, 0);
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Ryan C. Gordon <icculus@icculus.org>
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221 reader = _mm_new_rwops_reader(sample);
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Ryan C. Gordon <icculus@icculus.org>
parents:
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222 BAIL_IF_MACRO(reader == NULL, ERR_OUT_OF_MEMORY, 0);
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Ryan C. Gordon <icculus@icculus.org>
parents:
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223 m->module = Player_LoadGeneric(reader, 64, 0);
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Ryan C. Gordon <icculus@icculus.org>
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224 _mm_delete_rwops_reader(reader);
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Ryan C. Gordon <icculus@icculus.org>
parents:
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225 BAIL_IF_MACRO(m->module == NULL, "MOD: Not a module file.", 0);
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
226
120
bd224f22e6b2 Handles sample rate somewhat more robustly.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
227 if (md_mixfreq == 0)
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diff changeset
228 md_mixfreq = (!sample->desired.rate) ? 44100 : sample->desired.rate;
bd224f22e6b2 Handles sample rate somewhat more robustly.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
229
43
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Ryan C. Gordon <icculus@icculus.org>
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230 sample->actual.channels = 2;
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
231 sample->actual.rate = md_mixfreq;
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Ryan C. Gordon <icculus@icculus.org>
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232 sample->actual.format = AUDIO_S16SYS;
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
233 internal->decoder_private = (void *) m;
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
234
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
235 Player_Start(m->module);
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
236 Player_SetPosition(0);
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Ryan C. Gordon <icculus@icculus.org>
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237
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
238 /* !!! FIXME: A little late to be giving this information... */
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Ryan C. Gordon <icculus@icculus.org>
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239 sample->flags = SOUND_SAMPLEFLAG_NEEDSEEK;
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
240
62
b13fafb976be Changed _D macro to DBGSND.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
241 SNDDBG(("MOD: Accepting data stream\n"));
43
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Ryan C. Gordon <icculus@icculus.org>
parents:
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242 return(1); /* we'll handle this data. */
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
243 } /* MOD_open */
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
244
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Ryan C. Gordon <icculus@icculus.org>
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245
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
246 static void MOD_close(Sound_Sample *sample)
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
247 {
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
248 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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Ryan C. Gordon <icculus@icculus.org>
parents:
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249 mod_t *m = (mod_t *) internal->decoder_private;
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Ryan C. Gordon <icculus@icculus.org>
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250
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
251 Player_Free(m->module);
92
6252979e2453 Fixed a memory leak in the close() method.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
252 free(m);
43
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
253 } /* MOD_close */
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Ryan C. Gordon <icculus@icculus.org>
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254
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
255
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
256 static Uint32 MOD_read(Sound_Sample *sample)
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
257 {
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
258 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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Ryan C. Gordon <icculus@icculus.org>
parents:
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259 mod_t *m = (mod_t *) internal->decoder_private;
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
260
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
261 /* Switch to the current module, stopping any previous one. */
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
262 Player_Start(m->module);
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
263 if (!Player_Active())
e5082972f9bc Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
264 {
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
265 sample->flags |= SOUND_SAMPLEFLAG_EOF;
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
266 return(0);
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
267 } /* if */
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
268 return((Uint32) VC_WriteBytes(internal->buffer, internal->buffer_size));
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
269 } /* MOD_read */
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
270
64
40006625142a Changes in preparation of autoconf support.
Ryan C. Gordon <icculus@icculus.org>
parents: 62
diff changeset
271 #endif /* SOUND_SUPPORTS_MOD */
40006625142a Changes in preparation of autoconf support.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
272
43
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
273
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
274 /* end of mod.c ... */
e5082972f9bc Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
275