/
music.c
1610 lines (1486 loc) · 39.4 KB
1
/*
2
SDL_mixer: An audio mixer library based on the SDL library
3
Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
20
21
*/
22
/* $Id$ */
23
24
25
#include <stdlib.h>
#include <string.h>
26
#include <ctype.h>
27
#include <assert.h>
28
29
#include "SDL_endian.h"
#include "SDL_audio.h"
30
#include "SDL_timer.h"
31
32
#include "SDL_mixer.h"
33
#include "mixer.h"
34
35
36
37
38
39
40
#ifdef CMD_MUSIC
#include "music_cmd.h"
#endif
#ifdef WAV_MUSIC
#include "wavestream.h"
#endif
41
42
43
#ifdef MODPLUG_MUSIC
#include "music_modplug.h"
#endif
44
45
#ifdef MOD_MUSIC
#include "music_mod.h"
46
47
#endif
#ifdef MID_MUSIC
48
49
50
# ifdef USE_TIMIDITY_MIDI
# include "timidity.h"
# endif
51
52
53
# ifdef USE_FLUIDSYNTH_MIDI
# include "fluidsynth.h"
# endif
54
55
56
# ifdef USE_NATIVE_MIDI
# include "native_midi.h"
# endif
57
#endif
58
59
60
#ifdef OGG_MUSIC
#include "music_ogg.h"
#endif
61
#ifdef MP3_MUSIC
62
#include "dynamic_mp3.h"
63
64
65
66
#endif
#ifdef MP3_MAD_MUSIC
#include "music_mad.h"
#endif
67
68
69
#ifdef FLAC_MUSIC
#include "music_flac.h"
#endif
70
71
#if defined(MP3_MUSIC) || defined(MP3_MAD_MUSIC)
72
73
74
static SDL_AudioSpec used_mixer;
#endif
76
77
int volatile music_active = 1;
static int volatile music_stopped = 0;
78
79
static int music_loops = 0;
static char *music_cmd = NULL;
80
static Mix_Music * volatile music_playing = NULL;
81
static int music_volume = MIX_MAX_VOLUME;
82
83
struct _Mix_Music {
84
85
Mix_MusicType type;
union {
86
#ifdef CMD_MUSIC
87
MusicCMD *cmd;
88
89
#endif
#ifdef WAV_MUSIC
90
WAVStream *wave;
91
#endif
92
#ifdef MODPLUG_MUSIC
93
modplug_data *modplug;
94
#endif
95
#ifdef MOD_MUSIC
96
struct MODULE *module;
97
98
#endif
#ifdef MID_MUSIC
99
#ifdef USE_TIMIDITY_MIDI
100
MidiSong *midi;
101
#endif
102
#ifdef USE_FLUIDSYNTH_MIDI
103
FluidSynthMidiSong *fluidsynthmidi;
104
#endif
105
#ifdef USE_NATIVE_MIDI
106
NativeMidiSong *nativemidi;
107
#endif
108
#endif
109
#ifdef OGG_MUSIC
110
OGG_music *ogg;
111
#endif
112
#ifdef MP3_MUSIC
113
SMPEG *mp3;
114
115
#endif
#ifdef MP3_MAD_MUSIC
116
mad_data *mp3_mad;
117
118
#endif
#ifdef FLAC_MUSIC
119
FLAC_music *flac;
120
#endif
121
122
123
124
125
} data;
Mix_Fading fading;
int fade_step;
int fade_steps;
int error;
126
};
127
#ifdef MID_MUSIC
128
#ifdef USE_TIMIDITY_MIDI
129
static int timidity_ok;
130
static int samplesize;
131
#endif
132
133
134
#ifdef USE_FLUIDSYNTH_MIDI
static int fluidsynth_ok;
#endif
135
136
137
#ifdef USE_NATIVE_MIDI
static int native_midi_ok;
#endif
138
#endif
139
140
141
142
/* Used to calculate fading steps */
static int ms_per_step;
143
144
145
146
/* rcg06042009 report available decoders at runtime. */
static const char **music_decoders = NULL;
static int num_decoders = 0;
147
148
149
150
151
/* Semicolon-separated SoundFont paths */
#ifdef MID_MUSIC
char* soundfont_paths = NULL;
#endif
152
int Mix_GetNumMusicDecoders(void)
153
{
154
return(num_decoders);
155
156
157
158
}
const char *Mix_GetMusicDecoder(int index)
{
159
160
161
162
if ((index < 0) || (index >= num_decoders)) {
return NULL;
}
return(music_decoders[index]);
163
164
165
166
}
static void add_music_decoder(const char *decoder)
{
167
void *ptr = SDL_realloc((void *)music_decoders, (num_decoders + 1) * sizeof (const char *));
168
169
170
171
172
if (ptr == NULL) {
return; /* oh well, go on without it. */
}
music_decoders = (const char **) ptr;
music_decoders[num_decoders++] = decoder;
173
174
}
175
/* Local low-level functions prototypes */
176
static void music_internal_initialize_volume(void);
177
178
179
180
181
static void music_internal_volume(int volume);
static int music_internal_play(Mix_Music *music, double position);
static int music_internal_position(double position);
static int music_internal_playing();
static void music_internal_halt(void);
182
183
184
185
186
187
188
/* Support for hooking when the music has finished */
static void (*music_finished_hook)(void) = NULL;
void Mix_HookMusicFinished(void (*music_finished)(void))
{
189
Mix_LockAudio();
190
music_finished_hook = music_finished;
191
Mix_UnlockAudio();
192
193
194
}
195
/* If music isn't playing, halt it if no looping is required, restart it */
196
/* othesrchise. NOP if the music is playing */
197
198
static int music_halt_or_loop (void)
{
199
200
201
202
/* Restart music if it has to loop */
if (!music_internal_playing())
{
203
#ifdef USE_NATIVE_MIDI
204
205
206
207
208
209
210
211
212
213
/* Native MIDI handles looping internally */
if (music_playing->type == MUS_MID && native_midi_ok) {
music_loops = 0;
}
#endif
/* Restart music if it has to loop at a high level */
if (music_loops)
{
Mix_Fading current_fade;
214
215
216
if (music_loops > 0) {
--music_loops;
}
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
current_fade = music_playing->fading;
music_internal_play(music_playing, 0.0);
music_playing->fading = current_fade;
}
else
{
music_internal_halt();
if (music_finished_hook)
music_finished_hook();
return 0;
}
}
return 1;
232
233
234
235
}
236
237
238
/* Mixing function */
void music_mixer(void *udata, Uint8 *stream, int len)
{
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
int left = 0;
if ( music_playing && music_active ) {
/* Handle fading */
if ( music_playing->fading != MIX_NO_FADING ) {
if ( music_playing->fade_step++ < music_playing->fade_steps ) {
int volume;
int fade_step = music_playing->fade_step;
int fade_steps = music_playing->fade_steps;
if ( music_playing->fading == MIX_FADING_OUT ) {
volume = (music_volume * (fade_steps-fade_step)) / fade_steps;
} else { /* Fading in */
volume = (music_volume * fade_step) / fade_steps;
}
music_internal_volume(volume);
} else {
if ( music_playing->fading == MIX_FADING_OUT ) {
music_internal_halt();
if ( music_finished_hook ) {
music_finished_hook();
}
return;
}
music_playing->fading = MIX_NO_FADING;
}
}
music_halt_or_loop();
if (!music_internal_playing())
return;
switch (music_playing->type) {
272
#ifdef CMD_MUSIC
273
274
275
case MUS_CMD:
/* The playing is done externally */
break;
276
277
#endif
#ifdef WAV_MUSIC
278
279
280
case MUS_WAV:
left = WAVStream_PlaySome(stream, len);
break;
281
#endif
282
#ifdef MODPLUG_MUSIC
283
284
285
case MUS_MODPLUG:
left = modplug_playAudio(music_playing->data.modplug, stream, len);
break;
286
#endif
287
#ifdef MOD_MUSIC
288
289
290
case MUS_MOD:
left = MOD_playAudio(music_playing->data.module, stream, len);
break;
291
292
#endif
#ifdef MID_MUSIC
293
case MUS_MID:
294
#ifdef USE_NATIVE_MIDI
295
296
297
298
if ( native_midi_ok ) {
/* Native midi is handled asynchronously */
goto skip;
}
299
#endif
300
#ifdef USE_FLUIDSYNTH_MIDI
301
302
303
304
if ( fluidsynth_ok ) {
fluidsynth_playsome(music_playing->data.fluidsynthmidi, stream, len);
goto skip;
}
305
306
#endif
#ifdef USE_TIMIDITY_MIDI
307
308
309
310
311
if ( timidity_ok ) {
int samples = len / samplesize;
Timidity_PlaySome(stream, samples);
goto skip;
}
312
#endif
313
break;
314
#endif
315
#ifdef OGG_MUSIC
316
317
318
319
case MUS_OGG:
left = OGG_playAudio(music_playing->data.ogg, stream, len);
break;
320
#endif
321
#ifdef FLAC_MUSIC
322
323
324
case MUS_FLAC:
left = FLAC_playAudio(music_playing->data.flac, stream, len);
break;
325
#endif
326
#ifdef MP3_MUSIC
327
328
329
case MUS_MP3:
left = (len - smpeg.SMPEG_playAudio(music_playing->data.mp3, stream, len));
break;
330
331
#endif
#ifdef MP3_MAD_MUSIC
332
333
334
case MUS_MP3_MAD:
left = mad_getSamples(music_playing->data.mp3_mad, stream, len);
break;
335
#endif
336
337
338
339
340
default:
/* Unknown music type?? */
break;
}
}
341
342
skip:
343
344
345
346
347
348
/* Handle seamless music looping */
if (left > 0 && left < len) {
music_halt_or_loop();
if (music_internal_playing())
music_mixer(udata, stream+(len-left), left);
}
349
350
351
352
353
354
}
/* Initialize the music players with a certain desired audio format */
int open_music(SDL_AudioSpec *mixer)
{
#ifdef WAV_MUSIC
355
356
357
if ( WAVStream_Init(mixer) == 0 ) {
add_music_decoder("WAVE");
}
358
#endif
359
#ifdef MODPLUG_MUSIC
360
361
362
if ( modplug_init(mixer) == 0 ) {
add_music_decoder("MODPLUG");
}
363
#endif
364
#ifdef MOD_MUSIC
365
366
367
if ( MOD_init(mixer) == 0 ) {
add_music_decoder("MIKMOD");
}
368
369
#endif
#ifdef MID_MUSIC
370
#ifdef USE_TIMIDITY_MIDI
371
372
373
374
375
376
377
378
samplesize = mixer->size / mixer->samples;
if ( Timidity_Init(mixer->freq, mixer->format,
mixer->channels, mixer->samples) == 0 ) {
timidity_ok = 1;
add_music_decoder("TIMIDITY");
} else {
timidity_ok = 0;
}
379
#endif
380
#ifdef USE_FLUIDSYNTH_MIDI
381
382
383
384
385
386
if ( fluidsynth_init(mixer) == 0 ) {
fluidsynth_ok = 1;
add_music_decoder("FLUIDSYNTH");
} else {
fluidsynth_ok = 0;
}
387
#endif
388
#ifdef USE_NATIVE_MIDI
389
#ifdef USE_FLUIDSYNTH_MIDI
390
391
native_midi_ok = !fluidsynth_ok;
if ( native_midi_ok )
392
#endif
393
#ifdef USE_TIMIDITY_MIDI
394
395
396
397
398
native_midi_ok = !timidity_ok;
if ( !native_midi_ok ) {
native_midi_ok = (getenv("SDL_NATIVE_MUSIC") != NULL);
}
if ( native_midi_ok )
399
#endif
400
401
402
native_midi_ok = native_midi_detect();
if ( native_midi_ok )
add_music_decoder("NATIVEMIDI");
403
#endif
404
#endif
405
#ifdef OGG_MUSIC
406
407
408
if ( OGG_init(mixer) == 0 ) {
add_music_decoder("OGG");
}
409
#endif
410
#ifdef FLAC_MUSIC
411
412
413
if ( FLAC_init(mixer) == 0 ) {
add_music_decoder("FLAC");
}
414
#endif
415
#if defined(MP3_MUSIC) || defined(MP3_MAD_MUSIC)
416
417
418
/* Keep a copy of the mixer */
used_mixer = *mixer;
add_music_decoder("MP3");
419
#endif
420
421
422
423
music_playing = NULL;
music_stopped = 0;
Mix_VolumeMusic(SDL_MIX_MAXVOLUME);
424
425
426
/* Calculate the number of ms for each callback */
ms_per_step = (int) (((float)mixer->samples * 1000.0) / mixer->freq);
427
428
return(0);
429
430
}
431
432
433
/* Portable case-insensitive string compare function */
int MIX_string_equals(const char *str1, const char *str2)
{
434
435
436
437
438
439
440
441
while ( *str1 && *str2 ) {
if ( toupper((unsigned char)*str1) !=
toupper((unsigned char)*str2) )
break;
++str1;
++str2;
}
return (!*str1 && !*str2);
442
443
}
444
445
static int detect_mp3(Uint8 *magic)
{
446
447
448
449
450
451
452
453
454
455
456
457
458
459
if ( strncmp((char *)magic, "ID3", 3) == 0 ) {
return 1;
}
/* Detection code lifted from SMPEG */
if(((magic[0] & 0xff) != 0xff) || // No sync bits
((magic[1] & 0xf0) != 0xf0) || //
((magic[2] & 0xf0) == 0x00) || // Bitrate is 0
((magic[2] & 0xf0) == 0xf0) || // Bitrate is 15
((magic[2] & 0x0c) == 0x0c) || // Frequency is 3
((magic[1] & 0x06) == 0x00)) { // Layer is 4
return(0);
}
return 1;
460
461
462
463
464
465
466
}
/* MUS_MOD can't be auto-detected. If no other format was detected, MOD is
* assumed and MUS_MOD will be returned, meaning that the format might not
* actually be MOD-based.
*
* Returns MUS_NONE in case of errors. */
467
static Mix_MusicType detect_music_type(SDL_RWops *src)
468
{
469
470
471
Uint8 magic[5];
Uint8 moremagic[9];
472
473
Sint64 start = SDL_RWtell(src);
if (SDL_RWread(src, magic, 1, 4) != 4 || SDL_RWread(src, moremagic, 1, 8) != 8 ) {
474
475
476
Mix_SetError("Couldn't read from RWops");
return MUS_NONE;
}
477
SDL_RWseek(src, start, RW_SEEK_SET);
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
magic[4]='\0';
moremagic[8] = '\0';
/* WAVE files have the magic four bytes "RIFF"
AIFF files have the magic 12 bytes "FORM" XXXX "AIFF" */
if (((strcmp((char *)magic, "RIFF") == 0) && (strcmp((char *)(moremagic+4), "WAVE") == 0)) ||
(strcmp((char *)magic, "FORM") == 0)) {
return MUS_WAV;
}
/* Ogg Vorbis files have the magic four bytes "OggS" */
if (strcmp((char *)magic, "OggS") == 0) {
return MUS_OGG;
}
/* FLAC files have the magic four bytes "fLaC" */
if (strcmp((char *)magic, "fLaC") == 0) {
return MUS_FLAC;
}
/* MIDI files have the magic four bytes "MThd" */
if (strcmp((char *)magic, "MThd") == 0) {
return MUS_MID;
}
if (detect_mp3(magic)) {
return MUS_MP3;
}
/* Assume MOD format.
*
* Apparently there is no way to check if the file is really a MOD,
* or there are too many formats supported by MikMod/ModPlug, or
* MikMod/ModPlug does this check by itself. */
return MUS_MOD;
513
514
}
515
516
517
/* Load a music file */
Mix_Music *Mix_LoadMUS(const char *file)
{
518
SDL_RWops *src;
519
520
521
Mix_Music *music;
Mix_MusicType type;
char *ext = strrchr(file, '.');
522
523
#ifdef CMD_MUSIC
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
if ( music_cmd ) {
/* Allocate memory for the music structure */
music = (Mix_Music *)SDL_malloc(sizeof(Mix_Music));
if ( music == NULL ) {
Mix_SetError("Out of memory");
return(NULL);
}
music->error = 0;
music->type = MUS_CMD;
music->data.cmd = MusicCMD_LoadSong(music_cmd, file);
if ( music->data.cmd == NULL ) {
SDL_free(music);
music = NULL;
}
return music;
}
#endif
542
543
src = SDL_RWFromFile(file, "rb");
if ( src == NULL ) {
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
Mix_SetError("Couldn't open '%s'", file);
return NULL;
}
/* Use the extension as a first guess on the file type */
type = MUS_NONE;
ext = strrchr(file, '.');
/* No need to guard these with #ifdef *_MUSIC stuff,
* since we simply call Mix_LoadMUSType_RW() later */
if ( ext ) {
++ext; /* skip the dot in the extension */
if ( MIX_string_equals(ext, "WAV") ) {
type = MUS_WAV;
} else if ( MIX_string_equals(ext, "MID") ||
MIX_string_equals(ext, "MIDI") ||
MIX_string_equals(ext, "KAR") ) {
type = MUS_MID;
} else if ( MIX_string_equals(ext, "OGG") ) {
type = MUS_OGG;
} else if ( MIX_string_equals(ext, "FLAC") ) {
type = MUS_FLAC;
} else if ( MIX_string_equals(ext, "MPG") ||
MIX_string_equals(ext, "MPEG") ||
MIX_string_equals(ext, "MP3") ||
MIX_string_equals(ext, "MAD") ) {
type = MUS_MP3;
}
}
if ( type == MUS_NONE ) {
573
type = detect_music_type(src);
574
575
576
577
}
/* We need to know if a specific error occurs; if not, we'll set a
* generic one, so we clear the current one. */
578
SDL_ClearError();
579
music = Mix_LoadMUSType_RW(src, type, SDL_TRUE);
580
if ( music == NULL && Mix_GetError()[0] == '\0' ) {
581
Mix_SetError("Unrecognized music format");
582
583
}
return music;
584
585
}
586
Mix_Music *Mix_LoadMUS_RW(SDL_RWops *src, int freesrc)
587
{
588
return Mix_LoadMUSType_RW(src, MUS_NONE, freesrc);
589
590
}
591
Mix_Music *Mix_LoadMUSType_RW(SDL_RWops *src, Mix_MusicType type, int freesrc)
592
{
593
Mix_Music *music;
594
Sint64 start;
595
596
if (!src) {
597
598
599
Mix_SetError("RWops pointer is NULL");
return NULL;
}
600
start = SDL_RWtell(src);
601
602
603
604
/* If the caller wants auto-detection, figure out what kind of file
* this is. */
if (type == MUS_NONE) {
605
if ((type = detect_music_type(src)) == MUS_NONE) {
606
607
/* Don't call Mix_SetError() here since detect_music_type()
* does that. */
608
609
610
if (freesrc) {
SDL_RWclose(src);
}
611
612
613
614
615
616
617
618
return NULL;
}
}
/* Allocate memory for the music structure */
music = (Mix_Music *)SDL_malloc(sizeof(Mix_Music));
if (music == NULL ) {
Mix_SetError("Out of memory");
619
620
621
if (freesrc) {
SDL_RWclose(src);
}
622
623
return NULL;
}
624
music->error = 1;
625
626
switch (type) {
627
#ifdef WAV_MUSIC
628
case MUS_WAV:
629
630
631
632
music->type = MUS_WAV;
music->data.wave = WAVStream_LoadSong_RW(src, freesrc);
if (music->data.wave) {
music->error = 0;
633
634
}
break;
635
#endif
636
#ifdef OGG_MUSIC
637
638
case MUS_OGG:
music->type = MUS_OGG;
639
640
641
music->data.ogg = OGG_new_RW(src, freesrc);
if (music->data.ogg) {
music->error = 0;
642
643
}
break;
644
#endif
645
#ifdef FLAC_MUSIC
646
647
case MUS_FLAC:
music->type = MUS_FLAC;
648
649
650
music->data.flac = FLAC_new_RW(src, freesrc);
if (music->data.flac) {
music->error = 0;
651
652
}
break;
653
#endif
654
#ifdef MP3_MUSIC
655
case MUS_MP3:
656
if (Mix_Init(MIX_INIT_MP3)) {
657
658
SMPEG_Info info;
music->type = MUS_MP3;
659
660
music->data.mp3 = smpeg.SMPEG_new_rwops(src, &info, freesrc, 0);
if (!info.has_audio) {
661
Mix_SetError("MPEG file does not have any audio stream.");
662
663
664
smpeg.SMPEG_delete(music->data.mp3);
/* Deleting the MP3 closed the source if desired */
freesrc = SDL_FALSE;
665
666
} else {
smpeg.SMPEG_actualSpec(music->data.mp3, &used_mixer);
667
music->error = 0;
668
669
670
}
}
break;
671
#elif defined(MP3_MAD_MUSIC)
672
673
case MUS_MP3:
music->type = MUS_MP3_MAD;
674
675
676
677
music->data.mp3_mad = mad_openFileRW(src, &used_mixer, freesrc);
if (music->data.mp3_mad) {
music->error = 0;
} else {
678
679
680
Mix_SetError("Could not initialize MPEG stream.");
}
break;
682
#ifdef MID_MUSIC
683
684
case MUS_MID:
music->type = MUS_MID;
685
#ifdef USE_NATIVE_MIDI
686
687
688
689
690
691
if (native_midi_ok) {
SDL_RWseek(src, start, RW_SEEK_SET);
music->data.nativemidi = native_midi_loadsong_RW(src, freesrc);
if (music->data.nativemidi) {
music->error = 0;
} else {
692
693
694
695
Mix_SetError("%s", native_midi_error());
}
break;
}
696
697
#endif
#ifdef USE_FLUIDSYNTH_MIDI
698
699
700
701
702
if (fluidsynth_ok) {
SDL_RWseek(src, start, RW_SEEK_SET);
music->data.fluidsynthmidi = fluidsynth_loadsong_RW(src, freesrc);
if (music->data.fluidsynthmidi) {
music->error = 0;
703
704
705
}
break;
}
706
707
#endif
#ifdef USE_TIMIDITY_MIDI
708
709
710
711
712
713
if (timidity_ok) {
SDL_RWseek(src, start, RW_SEEK_SET);
music->data.midi = Timidity_LoadSong_RW(src, freesrc);
if (music->data.midi) {
music->error = 0;
} else {
714
715
716
717
718
719
720
Mix_SetError("%s", Timidity_Error());
}
} else {
Mix_SetError("%s", Timidity_Error());
}
#endif
break;
721
722
#endif
#if defined(MODPLUG_MUSIC) || defined(MOD_MUSIC)
723
case MUS_MOD:
724
#ifdef MODPLUG_MUSIC
725
726
if (music->error) {
SDL_RWseek(src, start, RW_SEEK_SET);
727
music->type = MUS_MODPLUG;
728
729
music->data.modplug = modplug_new_RW(src, freesrc);
if (music->data.modplug) {
730
731
732
music->error = 0;
}
}
733
#endif
734
#ifdef MOD_MUSIC
735
736
if (music->error) {
SDL_RWseek(src, start, RW_SEEK_SET);
737
music->type = MUS_MOD;
738
739
music->data.module = MOD_new_RW(src, freesrc);
if (music->data.module) {
740
741
742
music->error = 0;
}
}
743
#endif
744
break;
745
746
#endif
747
748
default:
Mix_SetError("Unrecognized music format");
749
break;
750
} /* switch (want) */
751
752
753
if (music->error) {
SDL_free(music);
754
755
756
757
758
759
if (freesrc) {
SDL_RWclose(src);
} else {
SDL_RWseek(src, start, RW_SEEK_SET);
}
music = NULL;
760
}
761
return music;
762
763
764
765
766
}
/* Free a music chunk previously loaded */
void Mix_FreeMusic(Mix_Music *music)
{
767
768
if ( music ) {
/* Stop the music if it's currently playing */
769
Mix_LockAudio();
770
771
772
if ( music == music_playing ) {
/* Wait for any fade out to finish */
while ( music->fading == MIX_FADING_OUT ) {
773
Mix_UnlockAudio();
774
SDL_Delay(100);
775
Mix_LockAudio();
776
777
778
779
780
}
if ( music == music_playing ) {
music_internal_halt();
}
}
781
Mix_UnlockAudio();
782
switch (music->type) {
783
#ifdef CMD_MUSIC
784
785
786
case MUS_CMD:
MusicCMD_FreeSong(music->data.cmd);
break;
787
788
#endif
#ifdef WAV_MUSIC
789
790
791
case MUS_WAV:
WAVStream_FreeSong(music->data.wave);
break;
792
#endif
793
#ifdef MODPLUG_MUSIC
794
795
796
case MUS_MODPLUG:
modplug_delete(music->data.modplug);
break;
797
#endif
798
#ifdef MOD_MUSIC
799
800
801
case MUS_MOD:
MOD_delete(music->data.module);
break;
802
803
#endif
#ifdef MID_MUSIC
804
case MUS_MID:
805
#ifdef USE_NATIVE_MIDI
806
807
808
809
if ( native_midi_ok ) {
native_midi_freesong(music->data.nativemidi);
goto skip;
}
810
811
#endif
#ifdef USE_FLUIDSYNTH_MIDI
812
813
814
815
if ( fluidsynth_ok ) {
fluidsynth_freesong(music->data.fluidsynthmidi);
goto skip;
}
816
#endif
817
#ifdef USE_TIMIDITY_MIDI
818
819
820
821
if ( timidity_ok ) {
Timidity_FreeSong(music->data.midi);
goto skip;
}
822
#endif
823
break;
824
#endif
825
#ifdef OGG_MUSIC
826
827
828
case MUS_OGG:
OGG_delete(music->data.ogg);
break;
829
#endif
830
#ifdef FLAC_MUSIC
831
832
833
case MUS_FLAC:
FLAC_delete(music->data.flac);
break;
834
#endif
835
#ifdef MP3_MUSIC
836
837
838
case MUS_MP3:
smpeg.SMPEG_delete(music->data.mp3);
break;
839
840
#endif
#ifdef MP3_MAD_MUSIC
841
842
843
case MUS_MP3_MAD:
mad_closeFile(music->data.mp3_mad);
break;
844
#endif
845
846
847
848
default:
/* Unknown music type?? */
break;
}
849
850
skip:
851
852
SDL_free(music);
}
853
854
}
855
856
857
858
859
/* Find out the music format of a mixer music, or the currently playing
music, if 'music' is NULL.
*/
Mix_MusicType Mix_GetMusicType(const Mix_Music *music)
{
860
861
862
863
864
Mix_MusicType type = MUS_NONE;
if ( music ) {
type = music->type;
} else {
865
Mix_LockAudio();
866
867
868
if ( music_playing ) {
type = music_playing->type;
}
869
Mix_UnlockAudio();
870
871
}
return(type);
872
873
}
874
875
876
/* Play a music chunk. Returns 0, or -1 if there was an error.
*/
static int music_internal_play(Mix_Music *music, double position)
877
{
878
int retval = 0;
879
880
#if defined(__MACOSX__) && defined(USE_NATIVE_MIDI)
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
/* This fixes a bug with native MIDI on Mac OS X, where you
can't really stop and restart MIDI from the audio callback.
*/
if ( music == music_playing && music->type == MUS_MID && native_midi_ok ) {
/* Just a seek suffices to restart playing */
music_internal_position(position);
return 0;
}
#endif
/* Note the music we're playing */
if ( music_playing ) {
music_internal_halt();
}
music_playing = music;
/* Set the initial volume */
if ( music->type != MUS_MOD ) {
music_internal_initialize_volume();
}
/* Set up for playback */
switch (music->type) {
904
#ifdef CMD_MUSIC
905
906
907
case MUS_CMD:
MusicCMD_Start(music->data.cmd);
break;
908
909
#endif
#ifdef WAV_MUSIC
910
911
912
case MUS_WAV:
WAVStream_Start(music->data.wave);
break;
913
#endif
914
#ifdef MODPLUG_MUSIC
915
916
917
918
919
case MUS_MODPLUG:
/* can't set volume until file is loaded, so finally set it now */
music_internal_initialize_volume();
modplug_play(music->data.modplug);
break;
920
#endif
921
#ifdef MOD_MUSIC
922
923
924
925
926
case MUS_MOD:
MOD_play(music->data.module);
/* Player_SetVolume() does nothing before Player_Start() */
music_internal_initialize_volume();
break;
927
928
#endif
#ifdef MID_MUSIC
929
case MUS_MID:
930
#ifdef USE_NATIVE_MIDI
931
932
933
934
if ( native_midi_ok ) {
native_midi_start(music->data.nativemidi, music_loops);
goto skip;
}
935
936
#endif
#ifdef USE_FLUIDSYNTH_MIDI
937
938
939
940
if (fluidsynth_ok ) {
fluidsynth_start(music->data.fluidsynthmidi);
goto skip;
}
941
#endif
942
#ifdef USE_TIMIDITY_MIDI
943
944
945
946
if ( timidity_ok ) {
Timidity_Start(music->data.midi);
goto skip;
}
947
#endif
948
break;
949
#endif
950
#ifdef OGG_MUSIC
951
952
953
case MUS_OGG:
OGG_play(music->data.ogg);
break;
954
#endif
955
#ifdef FLAC_MUSIC
956
957
958
case MUS_FLAC:
FLAC_play(music->data.flac);
break;
959
#endif
960
#ifdef MP3_MUSIC
961
962
963
964
965
case MUS_MP3:
smpeg.SMPEG_enableaudio(music->data.mp3,1);
smpeg.SMPEG_enablevideo(music->data.mp3,0);
smpeg.SMPEG_play(music_playing->data.mp3);
break;
966
967
#endif
#ifdef MP3_MAD_MUSIC
968
969
970
case MUS_MP3_MAD:
mad_start(music->data.mp3_mad);
break;
971
#endif
972
973
974
975
976
default:
Mix_SetError("Can't play unknown music type");
retval = -1;
break;
}
977
978
skip:
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
/* Set the playback position, note any errors if an offset is used */
if ( retval == 0 ) {
if ( position > 0.0 ) {
if ( music_internal_position(position) < 0 ) {
Mix_SetError("Position not implemented for music type");
retval = -1;
}
} else {
music_internal_position(0.0);
}
}
/* If the setup failed, we're not playing any music anymore */
if ( retval < 0 ) {
music_playing = NULL;
}
return(retval);
996
997
}
int Mix_FadeInMusicPos(Mix_Music *music, int loops, int ms, double position)
998
{
999
1000
int retval;