Mercurial > SDL_sound_CoreAudio
annotate decoders/mod.c @ 95:4436f4587c9a
Updated.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Tue, 02 Oct 2001 17:23:08 +0000 |
| parents | 230f75fac1d1 |
| children | 6d9fdec2f708 |
| 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 * | |
|
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26 * Please see the file LICENSE in the source's root directory. |
| 43 | 27 * |
| 28 * This file written by Torbjörn Andersson (d91tan@Update.UU.SE) | |
| 29 */ | |
| 30 | |
|
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31 #ifdef SOUND_SUPPORTS_MOD |
|
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32 |
| 43 | 33 #include <stdio.h> |
| 34 #include <stdlib.h> | |
| 35 #include <string.h> | |
| 36 #include <assert.h> | |
| 37 #include "SDL_sound.h" | |
| 38 #include "mikmod.h" | |
| 39 | |
| 40 #define __SDL_SOUND_INTERNAL__ | |
| 41 #include "SDL_sound_internal.h" | |
| 42 | |
| 43 static int MOD_init(void); | |
| 44 static void MOD_quit(void); | |
| 45 static int MOD_open(Sound_Sample *sample, const char *ext); | |
| 46 static void MOD_close(Sound_Sample *sample); | |
| 47 static Uint32 MOD_read(Sound_Sample *sample); | |
| 48 | |
| 49 const Sound_DecoderFunctions __Sound_DecoderFunctions_MOD = | |
| 50 { | |
| 51 { | |
| 52 "MOD", | |
| 53 "Play modules through MikMod", | |
| 54 "Torbjörn Andersson <d91tan@Update.UU.SE>", | |
| 55 "http://www.mikmod.org/" | |
| 56 }, | |
| 57 | |
| 58 MOD_init, /* init() method */ | |
| 59 MOD_quit, /* quit() method */ | |
| 60 MOD_open, /* open() method */ | |
| 61 MOD_close, /* close() method */ | |
| 62 MOD_read /* read() method */ | |
| 63 }; | |
| 64 | |
| 65 /* this is what we store in our internal->decoder_private field... */ | |
| 66 typedef struct { | |
| 67 MODULE *module; | |
| 68 } mod_t; | |
| 69 | |
| 70 | |
| 71 /* Make MikMod read from a RWops... */ | |
| 72 | |
| 73 typedef struct MRWOPSREADER { | |
| 74 MREADER core; | |
| 75 Sound_Sample *sample; | |
| 76 int end; | |
| 77 } MRWOPSREADER; | |
| 78 | |
| 79 static BOOL _mm_RWopsReader_eof(MREADER *reader) | |
| 80 { | |
| 81 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; | |
| 82 Sound_Sample *sample = rwops_reader->sample; | |
| 83 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 84 int pos = SDL_RWtell(internal->rw); | |
| 85 | |
| 86 if (rwops_reader->end == pos) | |
| 87 return(1); | |
| 88 | |
| 89 return(0); | |
| 90 } /* _mm_RWopsReader_eof */ | |
| 91 | |
| 92 | |
| 93 static BOOL _mm_RWopsReader_read(MREADER *reader, void *ptr, size_t size) | |
| 94 { | |
| 95 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; | |
| 96 Sound_Sample *sample = rwops_reader->sample; | |
| 97 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 98 return(SDL_RWread(internal->rw, ptr, size, 1)); | |
| 99 } /* _mm_RWopsReader_Read */ | |
| 100 | |
| 101 | |
| 102 static int _mm_RWopsReader_get(MREADER *reader) | |
| 103 { | |
| 104 char buf; | |
| 105 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; | |
| 106 Sound_Sample *sample = rwops_reader->sample; | |
| 107 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 108 | |
| 109 if (SDL_RWread(internal->rw, &buf, 1, 1) != 1) | |
| 110 return(EOF); | |
| 111 | |
| 112 return((int) buf); | |
| 113 } /* _mm_RWopsReader_get */ | |
| 114 | |
| 115 | |
| 116 static BOOL _mm_RWopsReader_seek(MREADER *reader, long offset, int whence) | |
| 117 { | |
| 118 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; | |
| 119 Sound_Sample *sample = rwops_reader->sample; | |
| 120 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 121 | |
| 122 return(SDL_RWseek(internal->rw, offset, whence)); | |
| 123 } /* _mm_RWopsReader_seek */ | |
| 124 | |
| 125 | |
| 126 static long _mm_RWopsReader_tell(MREADER *reader) | |
| 127 { | |
| 128 MRWOPSREADER *rwops_reader = (MRWOPSREADER *) reader; | |
| 129 Sound_Sample *sample = rwops_reader->sample; | |
| 130 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 131 | |
| 132 return(SDL_RWtell(internal->rw)); | |
| 133 } /* _mm_RWopsReader_tell */ | |
| 134 | |
| 135 | |
| 136 static MREADER *_mm_new_rwops_reader(Sound_Sample *sample) | |
| 137 { | |
| 138 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 139 | |
| 140 MRWOPSREADER *reader = (MRWOPSREADER *) malloc(sizeof (MRWOPSREADER)); | |
| 141 if (reader != NULL) | |
| 142 { | |
| 143 int here; | |
| 144 reader->core.Eof = _mm_RWopsReader_eof; | |
| 145 reader->core.Read = _mm_RWopsReader_read; | |
| 146 reader->core.Get = _mm_RWopsReader_get; | |
| 147 reader->core.Seek = _mm_RWopsReader_seek; | |
| 148 reader->core.Tell = _mm_RWopsReader_tell; | |
| 149 reader->sample = sample; | |
| 150 | |
| 151 /* RWops does not explicitly support an eof check, so we shall find | |
| 152 the end manually - this requires seek support for the RWop */ | |
| 153 here = SDL_RWtell(internal->rw); | |
| 154 reader->end = SDL_RWseek(internal->rw, 0, SEEK_END); | |
| 155 SDL_RWseek(internal->rw, here, SEEK_SET); /* Move back */ | |
| 156 /* !!! FIXME: What happens if the seek fails? */ | |
| 157 } /* if */ | |
| 158 | |
| 159 return((MREADER *) reader); | |
| 160 } /* _mm_new_rwops_reader */ | |
| 161 | |
| 162 | |
| 163 static void _mm_delete_rwops_reader(MREADER *reader) | |
| 164 { | |
| 165 /* SDL_sound will delete the RWops and sample at a higher level... */ | |
| 166 if (reader != NULL) | |
| 167 free(reader); | |
| 168 } /* _mm_delete_rwops_reader */ | |
| 169 | |
| 170 | |
| 171 | |
| 172 static int MOD_init(void) | |
| 173 { | |
|
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174 MikMod_RegisterDriver(&drv_nos); |
| 43 | 175 MikMod_RegisterAllLoaders(); |
| 176 | |
| 177 /* | |
| 178 * Both DMODE_SOFT_MUSIC and DMODE_16BITS should be set by default, | |
| 179 * so this is just for clarity. I haven't experimented with any of | |
| 180 * the other flags. There are a few which are said to give better | |
| 181 * sound quality. | |
| 182 */ | |
| 183 md_mode |= (DMODE_SOFT_MUSIC | DMODE_16BITS); | |
|
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
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184 |
|
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going with MikMod defaults (adds more reverb) and only register the "no
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185 #if 0 |
| 43 | 186 /* |
| 187 * SDL_mixer used to set these, but I don't know... is there | |
| 188 * something wrong with the defaults? Actually, the only difference | |
| 189 * from the defaults is md_reverb, which is usually 6. | |
| 190 */ | |
| 191 md_device = 0; /* Selects sound driver. 0 = autodetect */ | |
| 192 md_volume = 96; /* Overall sound volume, 0 - 128 */ | |
| 193 md_musicvolume = 128; /* Module volume, 0 - 128 */ | |
| 194 md_sndfxvolume = 128; /* Sound effect volume, 0 - 128 */ | |
| 195 md_pansep = 128; /* Stereo channels separation, 0 - 128 */ | |
| 196 md_reverb = 0; /* Sound reverbation, 0 - 15 */ | |
| 197 #endif | |
| 198 | |
| 199 BAIL_IF_MACRO(MikMod_Init(""), MikMod_strerror(MikMod_errno), 0); | |
| 200 | |
| 201 return(1); /* success. */ | |
| 202 } /* MOD_init */ | |
| 203 | |
| 204 | |
| 205 static void MOD_quit(void) | |
| 206 { | |
| 207 MikMod_Exit(); | |
| 208 } /* MOD_quit */ | |
| 209 | |
| 210 | |
| 211 static int MOD_open(Sound_Sample *sample, const char *ext) | |
| 212 { | |
| 213 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 214 MREADER *reader; | |
| 215 mod_t *m; | |
| 216 | |
| 217 m = (mod_t *) malloc(sizeof(mod_t)); | |
| 218 BAIL_IF_MACRO(m == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 219 reader = _mm_new_rwops_reader(sample); | |
| 220 BAIL_IF_MACRO(reader == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 221 m->module = Player_LoadGeneric(reader, 64, 0); | |
| 222 _mm_delete_rwops_reader(reader); | |
| 223 BAIL_IF_MACRO(m->module == NULL, "MOD: Not a module file.", 0); | |
| 224 | |
| 225 md_mixfreq = sample->desired.rate; | |
| 226 sample->actual.channels = 2; | |
| 227 sample->actual.rate = md_mixfreq; | |
| 228 sample->actual.format = AUDIO_S16SYS; | |
| 229 internal->decoder_private = (void *) m; | |
| 230 | |
| 231 Player_Start(m->module); | |
| 232 Player_SetPosition(0); | |
| 233 | |
| 234 /* !!! FIXME: A little late to be giving this information... */ | |
| 235 sample->flags = SOUND_SAMPLEFLAG_NEEDSEEK; | |
| 236 | |
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237 SNDDBG(("MOD: Accepting data stream\n")); |
| 43 | 238 return(1); /* we'll handle this data. */ |
| 239 } /* MOD_open */ | |
| 240 | |
| 241 | |
| 242 static void MOD_close(Sound_Sample *sample) | |
| 243 { | |
| 244 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 245 mod_t *m = (mod_t *) internal->decoder_private; | |
| 246 | |
| 247 Player_Free(m->module); | |
|
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248 free(m); |
| 43 | 249 } /* MOD_close */ |
| 250 | |
| 251 | |
| 252 static Uint32 MOD_read(Sound_Sample *sample) | |
| 253 { | |
| 254 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 255 mod_t *m = (mod_t *) internal->decoder_private; | |
| 256 | |
| 257 /* Switch to the current module, stopping any previous one. */ | |
| 258 Player_Start(m->module); | |
| 259 if (!Player_Active()) | |
| 260 { | |
| 261 sample->flags |= SOUND_SAMPLEFLAG_EOF; | |
| 262 return(0); | |
| 263 } /* if */ | |
| 264 return((Uint32) VC_WriteBytes(internal->buffer, internal->buffer_size)); | |
| 265 } /* MOD_read */ | |
| 266 | |
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64
40006625142a
Changes in preparation of autoconf support.
Ryan C. Gordon <icculus@icculus.org>
parents:
62
diff
changeset
|
267 #endif /* SOUND_SUPPORTS_MOD */ |
|
40006625142a
Changes in preparation of autoconf support.
Ryan C. Gordon <icculus@icculus.org>
parents:
62
diff
changeset
|
268 |
| 43 | 269 |
| 270 /* end of mod.c ... */ | |
| 271 |