Mercurial > SDL_sound_CoreAudio
annotate decoders/mod.c @ 54:6df2f69e037e
Fixes by Torbj�rn...now the thing actually works! :) See the CHANGELOG
entry for 09242001 for an explanation of what the problem was.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 24 Sep 2001 07:55:22 +0000 |
| parents | 69d56e196de7 |
| children | b13fafb976be |
| rev | line source |
|---|---|
| 43 | 1 /* |
| 2 * SDL_sound -- An abstract sound format decoding API. | |
| 3 * Copyright (C) 2001 Ryan C. Gordon. | |
| 4 * | |
| 5 * This library is free software; you can redistribute it and/or | |
| 6 * modify it under the terms of the GNU Lesser General Public | |
| 7 * License as published by the Free Software Foundation; either | |
| 8 * version 2.1 of the License, or (at your option) any later version. | |
| 9 * | |
| 10 * This library is distributed in the hope that it will be useful, | |
| 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 * Lesser General Public License for more details. | |
| 14 * | |
| 15 * You should have received a copy of the GNU Lesser General Public | |
| 16 * License along with this library; if not, write to the Free Software | |
| 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 */ | |
| 19 | |
| 20 /* | |
| 21 * Module player - through MikMod - for SDL_sound. | |
| 22 * | |
| 23 * This driver handles anything our subset of MikMod handles. It is based on | |
| 24 * SDL_mixer's MikMod music player. | |
| 25 * | |
| 26 * Please see the file LICENSE in the source's root directory, and the file | |
| 27 * COPYING.LESSER in the mikmod subdirectory. | |
| 28 * | |
| 29 * This file written by Torbjörn Andersson (d91tan@Update.UU.SE) | |
| 30 */ | |
| 31 | |
| 32 #include <stdio.h> | |
| 33 #include <stdlib.h> | |
| 34 #include <string.h> | |
| 35 #include <assert.h> | |
| 36 #include "SDL_sound.h" | |
| 37 #include "mikmod.h" | |
| 38 | |
| 39 #define __SDL_SOUND_INTERNAL__ | |
| 40 #include "SDL_sound_internal.h" | |
| 41 | |
| 42 #if (!defined SOUND_SUPPORTS_MOD) | |
| 43 #error SOUND_SUPPORTS_MOD must be defined. | |
| 44 #endif | |
| 45 | |
| 46 static int MOD_init(void); | |
| 47 static void MOD_quit(void); | |
| 48 static int MOD_open(Sound_Sample *sample, const char *ext); | |
| 49 static void MOD_close(Sound_Sample *sample); | |
| 50 static Uint32 MOD_read(Sound_Sample *sample); | |
| 51 | |
| 52 const Sound_DecoderFunctions __Sound_DecoderFunctions_MOD = | |
| 53 { | |
| 54 { | |
| 55 "MOD", | |
| 56 "Play modules through MikMod", | |
| 57 "Torbjörn Andersson <d91tan@Update.UU.SE>", | |
| 58 "http://www.mikmod.org/" | |
| 59 }, | |
| 60 | |
| 61 MOD_init, /* init() method */ | |
| 62 MOD_quit, /* quit() method */ | |
| 63 MOD_open, /* open() method */ | |
| 64 MOD_close, /* close() method */ | |
| 65 MOD_read /* read() method */ | |
| 66 }; | |
| 67 | |
| 68 /* this is what we store in our internal->decoder_private field... */ | |
| 69 typedef struct { | |
| 70 MODULE *module; | |
| 71 } mod_t; | |
| 72 | |
| 73 | |
| 74 /* Make MikMod read from a RWops... */ | |
| 75 | |
| 76 typedef struct MRWOPSREADER { | |
| 77 MREADER core; | |
| 78 Sound_Sample *sample; | |
| 79 int end; | |
| 80 } MRWOPSREADER; | |
| 81 | |
| 82 static BOOL _mm_RWopsReader_eof(MREADER *reader) | |
| 83 { | |
| 84 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; | |
| 85 Sound_Sample *sample = rwops_reader->sample; | |
| 86 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 87 int pos = SDL_RWtell(internal->rw); | |
| 88 | |
| 89 if (rwops_reader->end == pos) | |
| 90 return(1); | |
| 91 | |
| 92 return(0); | |
| 93 } /* _mm_RWopsReader_eof */ | |
| 94 | |
| 95 | |
| 96 static BOOL _mm_RWopsReader_read(MREADER *reader, void *ptr, size_t size) | |
| 97 { | |
| 98 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; | |
| 99 Sound_Sample *sample = rwops_reader->sample; | |
| 100 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 101 return(SDL_RWread(internal->rw, ptr, size, 1)); | |
| 102 } /* _mm_RWopsReader_Read */ | |
| 103 | |
| 104 | |
| 105 static int _mm_RWopsReader_get(MREADER *reader) | |
| 106 { | |
| 107 char buf; | |
| 108 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; | |
| 109 Sound_Sample *sample = rwops_reader->sample; | |
| 110 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 111 | |
| 112 if (SDL_RWread(internal->rw, &buf, 1, 1) != 1) | |
| 113 return(EOF); | |
| 114 | |
| 115 return((int) buf); | |
| 116 } /* _mm_RWopsReader_get */ | |
| 117 | |
| 118 | |
| 119 static BOOL _mm_RWopsReader_seek(MREADER *reader, long offset, int whence) | |
| 120 { | |
| 121 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; | |
| 122 Sound_Sample *sample = rwops_reader->sample; | |
| 123 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 124 | |
| 125 return(SDL_RWseek(internal->rw, offset, whence)); | |
| 126 } /* _mm_RWopsReader_seek */ | |
| 127 | |
| 128 | |
| 129 static long _mm_RWopsReader_tell(MREADER *reader) | |
| 130 { | |
| 131 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; | |
| 132 Sound_Sample *sample = rwops_reader->sample; | |
| 133 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 134 | |
| 135 return(SDL_RWtell(internal->rw)); | |
| 136 } /* _mm_RWopsReader_tell */ | |
| 137 | |
| 138 | |
| 139 static MREADER *_mm_new_rwops_reader(Sound_Sample *sample) | |
| 140 { | |
| 141 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 142 | |
| 143 MRWOPSREADER *reader = (MRWOPSREADER *) malloc(sizeof (MRWOPSREADER)); | |
| 144 if (reader != NULL) | |
| 145 { | |
| 146 int here; | |
| 147 reader->core.Eof = _mm_RWopsReader_eof; | |
| 148 reader->core.Read = _mm_RWopsReader_read; | |
| 149 reader->core.Get = _mm_RWopsReader_get; | |
| 150 reader->core.Seek = _mm_RWopsReader_seek; | |
| 151 reader->core.Tell = _mm_RWopsReader_tell; | |
| 152 reader->sample = sample; | |
| 153 | |
| 154 /* RWops does not explicitly support an eof check, so we shall find | |
| 155 the end manually - this requires seek support for the RWop */ | |
| 156 here = SDL_RWtell(internal->rw); | |
| 157 reader->end = SDL_RWseek(internal->rw, 0, SEEK_END); | |
| 158 SDL_RWseek(internal->rw, here, SEEK_SET); /* Move back */ | |
| 159 /* !!! FIXME: What happens if the seek fails? */ | |
| 160 } /* if */ | |
| 161 | |
| 162 return((MREADER *) reader); | |
| 163 } /* _mm_new_rwops_reader */ | |
| 164 | |
| 165 | |
| 166 static void _mm_delete_rwops_reader(MREADER *reader) | |
| 167 { | |
| 168 /* SDL_sound will delete the RWops and sample at a higher level... */ | |
| 169 if (reader != NULL) | |
| 170 free(reader); | |
| 171 } /* _mm_delete_rwops_reader */ | |
| 172 | |
| 173 | |
| 174 | |
| 175 static int MOD_init(void) | |
| 176 { | |
|
52
69d56e196de7
going with MikMod defaults (adds more reverb) and only register the "no
Ryan C. Gordon <icculus@icculus.org>
parents:
43
diff
changeset
|
177 MikMod_RegisterDriver(&drv_nos); |
| 43 | 178 MikMod_RegisterAllLoaders(); |
| 179 | |
| 180 /* | |
| 181 * Both DMODE_SOFT_MUSIC and DMODE_16BITS should be set by default, | |
| 182 * so this is just for clarity. I haven't experimented with any of | |
| 183 * the other flags. There are a few which are said to give better | |
| 184 * sound quality. | |
| 185 */ | |
| 186 md_mode |= (DMODE_SOFT_MUSIC | DMODE_16BITS); | |
|
52
69d56e196de7
going with MikMod defaults (adds more reverb) and only register the "no
Ryan C. Gordon <icculus@icculus.org>
parents:
43
diff
changeset
|
187 |
|
69d56e196de7
going with MikMod defaults (adds more reverb) and only register the "no
Ryan C. Gordon <icculus@icculus.org>
parents:
43
diff
changeset
|
188 #if 0 |
| 43 | 189 /* |
| 190 * SDL_mixer used to set these, but I don't know... is there | |
| 191 * something wrong with the defaults? Actually, the only difference | |
| 192 * from the defaults is md_reverb, which is usually 6. | |
| 193 */ | |
| 194 md_device = 0; /* Selects sound driver. 0 = autodetect */ | |
| 195 md_volume = 96; /* Overall sound volume, 0 - 128 */ | |
| 196 md_musicvolume = 128; /* Module volume, 0 - 128 */ | |
| 197 md_sndfxvolume = 128; /* Sound effect volume, 0 - 128 */ | |
| 198 md_pansep = 128; /* Stereo channels separation, 0 - 128 */ | |
| 199 md_reverb = 0; /* Sound reverbation, 0 - 15 */ | |
| 200 #endif | |
| 201 | |
| 202 BAIL_IF_MACRO(MikMod_Init(""), MikMod_strerror(MikMod_errno), 0); | |
| 203 | |
| 204 return(1); /* success. */ | |
| 205 } /* MOD_init */ | |
| 206 | |
| 207 | |
| 208 static void MOD_quit(void) | |
| 209 { | |
| 210 MikMod_Exit(); | |
| 211 } /* MOD_quit */ | |
| 212 | |
| 213 | |
| 214 static int MOD_open(Sound_Sample *sample, const char *ext) | |
| 215 { | |
| 216 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 217 MREADER *reader; | |
| 218 mod_t *m; | |
| 219 | |
| 220 m = (mod_t *) malloc(sizeof(mod_t)); | |
| 221 BAIL_IF_MACRO(m == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 222 reader = _mm_new_rwops_reader(sample); | |
| 223 BAIL_IF_MACRO(reader == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 224 m->module = Player_LoadGeneric(reader, 64, 0); | |
| 225 _mm_delete_rwops_reader(reader); | |
| 226 BAIL_IF_MACRO(m->module == NULL, "MOD: Not a module file.", 0); | |
| 227 | |
| 228 md_mixfreq = sample->desired.rate; | |
| 229 sample->actual.channels = 2; | |
| 230 sample->actual.rate = md_mixfreq; | |
| 231 sample->actual.format = AUDIO_S16SYS; | |
| 232 internal->decoder_private = (void *) m; | |
| 233 | |
| 234 Player_Start(m->module); | |
| 235 Player_SetPosition(0); | |
| 236 | |
| 237 /* !!! FIXME: A little late to be giving this information... */ | |
| 238 sample->flags = SOUND_SAMPLEFLAG_NEEDSEEK; | |
| 239 | |
| 240 _D(("MOD: Accepting data stream\n")); | |
| 241 return(1); /* we'll handle this data. */ | |
| 242 } /* MOD_open */ | |
| 243 | |
| 244 | |
| 245 static void MOD_close(Sound_Sample *sample) | |
| 246 { | |
| 247 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 248 mod_t *m = (mod_t *) internal->decoder_private; | |
| 249 | |
| 250 Player_Free(m->module); | |
| 251 } /* MOD_close */ | |
| 252 | |
| 253 | |
| 254 static Uint32 MOD_read(Sound_Sample *sample) | |
| 255 { | |
| 256 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 257 mod_t *m = (mod_t *) internal->decoder_private; | |
| 258 | |
| 259 /* Switch to the current module, stopping any previous one. */ | |
| 260 Player_Start(m->module); | |
| 261 if (!Player_Active()) | |
| 262 { | |
| 263 sample->flags |= SOUND_SAMPLEFLAG_EOF; | |
| 264 return(0); | |
| 265 } /* if */ | |
| 266 return((Uint32) VC_WriteBytes(internal->buffer, internal->buffer_size)); | |
| 267 } /* MOD_read */ | |
| 268 | |
| 269 | |
| 270 /* end of mod.c ... */ | |
| 271 |