/
music.c
1609 lines (1485 loc) · 39.4 KB
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/*
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SDL_mixer: An audio mixer library based on the SDL library
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Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
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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.
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*/
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/* $Id$ */
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#include <stdlib.h>
#include <string.h>
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#include <ctype.h>
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#include <assert.h>
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#include "SDL_endian.h"
#include "SDL_audio.h"
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#include "SDL_timer.h"
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#include "SDL_mixer.h"
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#ifdef CMD_MUSIC
#include "music_cmd.h"
#endif
#ifdef WAV_MUSIC
#include "wavestream.h"
#endif
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#ifdef MODPLUG_MUSIC
#include "music_modplug.h"
#endif
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#ifdef MOD_MUSIC
#include "music_mod.h"
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#endif
#ifdef MID_MUSIC
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# ifdef USE_TIMIDITY_MIDI
# include "timidity.h"
# endif
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# ifdef USE_FLUIDSYNTH_MIDI
# include "fluidsynth.h"
# endif
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# ifdef USE_NATIVE_MIDI
# include "native_midi.h"
# endif
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#endif
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#ifdef OGG_MUSIC
#include "music_ogg.h"
#endif
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#ifdef MP3_MUSIC
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#include "dynamic_mp3.h"
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#endif
#ifdef MP3_MAD_MUSIC
#include "music_mad.h"
#endif
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#ifdef FLAC_MUSIC
#include "music_flac.h"
#endif
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#if defined(MP3_MUSIC) || defined(MP3_MAD_MUSIC)
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static SDL_AudioSpec used_mixer;
#endif
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int volatile music_active = 1;
static int volatile music_stopped = 0;
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static int music_loops = 0;
static char *music_cmd = NULL;
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static Mix_Music * volatile music_playing = NULL;
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static int music_volume = MIX_MAX_VOLUME;
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struct _Mix_Music {
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Mix_MusicType type;
union {
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#ifdef CMD_MUSIC
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MusicCMD *cmd;
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#endif
#ifdef WAV_MUSIC
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WAVStream *wave;
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#endif
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#ifdef MODPLUG_MUSIC
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modplug_data *modplug;
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#endif
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#ifdef MOD_MUSIC
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struct MODULE *module;
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#endif
#ifdef MID_MUSIC
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#ifdef USE_TIMIDITY_MIDI
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MidiSong *midi;
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#endif
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#ifdef USE_FLUIDSYNTH_MIDI
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FluidSynthMidiSong *fluidsynthmidi;
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#endif
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#ifdef USE_NATIVE_MIDI
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NativeMidiSong *nativemidi;
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#endif
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#endif
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#ifdef OGG_MUSIC
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OGG_music *ogg;
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#endif
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#ifdef MP3_MUSIC
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SMPEG *mp3;
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#endif
#ifdef MP3_MAD_MUSIC
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mad_data *mp3_mad;
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#endif
#ifdef FLAC_MUSIC
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FLAC_music *flac;
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#endif
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} data;
Mix_Fading fading;
int fade_step;
int fade_steps;
int error;
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};
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#ifdef MID_MUSIC
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#ifdef USE_TIMIDITY_MIDI
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static int timidity_ok;
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static int samplesize;
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#endif
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#ifdef USE_FLUIDSYNTH_MIDI
static int fluidsynth_ok;
#endif
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#ifdef USE_NATIVE_MIDI
static int native_midi_ok;
#endif
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#endif
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/* Used to calculate fading steps */
static int ms_per_step;
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/* rcg06042009 report available decoders at runtime. */
static const char **music_decoders = NULL;
static int num_decoders = 0;
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/* Semicolon-separated SoundFont paths */
#ifdef MID_MUSIC
char* soundfont_paths = NULL;
#endif
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int Mix_GetNumMusicDecoders(void)
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{
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return(num_decoders);
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}
const char *Mix_GetMusicDecoder(int index)
{
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if ((index < 0) || (index >= num_decoders)) {
return NULL;
}
return(music_decoders[index]);
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}
static void add_music_decoder(const char *decoder)
{
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void *ptr = SDL_realloc((void *)music_decoders, (num_decoders + 1) * sizeof (const char *));
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if (ptr == NULL) {
return; /* oh well, go on without it. */
}
music_decoders = (const char **) ptr;
music_decoders[num_decoders++] = decoder;
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}
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/* Local low-level functions prototypes */
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static void music_internal_initialize_volume(void);
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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);
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/* Support for hooking when the music has finished */
static void (*music_finished_hook)(void) = NULL;
void Mix_HookMusicFinished(void (*music_finished)(void))
{
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SDL_LockAudio();
music_finished_hook = music_finished;
SDL_UnlockAudio();
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}
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/* If music isn't playing, halt it if no looping is required, restart it */
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/* othesrchise. NOP if the music is playing */
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static int music_halt_or_loop (void)
{
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/* Restart music if it has to loop */
if (!music_internal_playing())
{
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#ifdef USE_NATIVE_MIDI
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/* 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;
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if (music_loops > 0) {
--music_loops;
}
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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;
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}
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/* Mixing function */
void music_mixer(void *udata, Uint8 *stream, int len)
{
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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) {
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#ifdef CMD_MUSIC
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case MUS_CMD:
/* The playing is done externally */
break;
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#endif
#ifdef WAV_MUSIC
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case MUS_WAV:
left = WAVStream_PlaySome(stream, len);
break;
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#endif
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#ifdef MODPLUG_MUSIC
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case MUS_MODPLUG:
left = modplug_playAudio(music_playing->data.modplug, stream, len);
break;
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#endif
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#ifdef MOD_MUSIC
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case MUS_MOD:
left = MOD_playAudio(music_playing->data.module, stream, len);
break;
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#endif
#ifdef MID_MUSIC
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case MUS_MID:
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#ifdef USE_NATIVE_MIDI
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if ( native_midi_ok ) {
/* Native midi is handled asynchronously */
goto skip;
}
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#endif
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#ifdef USE_FLUIDSYNTH_MIDI
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if ( fluidsynth_ok ) {
fluidsynth_playsome(music_playing->data.fluidsynthmidi, stream, len);
goto skip;
}
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#endif
#ifdef USE_TIMIDITY_MIDI
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if ( timidity_ok ) {
int samples = len / samplesize;
Timidity_PlaySome(stream, samples);
goto skip;
}
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#endif
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break;
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#endif
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#ifdef OGG_MUSIC
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case MUS_OGG:
left = OGG_playAudio(music_playing->data.ogg, stream, len);
break;
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#endif
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#ifdef FLAC_MUSIC
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case MUS_FLAC:
left = FLAC_playAudio(music_playing->data.flac, stream, len);
break;
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#endif
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#ifdef MP3_MUSIC
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case MUS_MP3:
left = (len - smpeg.SMPEG_playAudio(music_playing->data.mp3, stream, len));
break;
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#endif
#ifdef MP3_MAD_MUSIC
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case MUS_MP3_MAD:
left = mad_getSamples(music_playing->data.mp3_mad, stream, len);
break;
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#endif
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default:
/* Unknown music type?? */
break;
}
}
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skip:
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/* Handle seamless music looping */
if (left > 0 && left < len) {
music_halt_or_loop();
if (music_internal_playing())
music_mixer(udata, stream+(len-left), left);
}
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}
/* Initialize the music players with a certain desired audio format */
int open_music(SDL_AudioSpec *mixer)
{
#ifdef WAV_MUSIC
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if ( WAVStream_Init(mixer) == 0 ) {
add_music_decoder("WAVE");
}
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#endif
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#ifdef MODPLUG_MUSIC
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if ( modplug_init(mixer) == 0 ) {
add_music_decoder("MODPLUG");
}
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#endif
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#ifdef MOD_MUSIC
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if ( MOD_init(mixer) == 0 ) {
add_music_decoder("MIKMOD");
}
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#endif
#ifdef MID_MUSIC
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#ifdef USE_TIMIDITY_MIDI
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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;
}
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#endif
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#ifdef USE_FLUIDSYNTH_MIDI
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if ( fluidsynth_init(mixer) == 0 ) {
fluidsynth_ok = 1;
add_music_decoder("FLUIDSYNTH");
} else {
fluidsynth_ok = 0;
}
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#endif
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#ifdef USE_NATIVE_MIDI
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#ifdef USE_FLUIDSYNTH_MIDI
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native_midi_ok = !fluidsynth_ok;
if ( native_midi_ok )
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#endif
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#ifdef USE_TIMIDITY_MIDI
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native_midi_ok = !timidity_ok;
if ( !native_midi_ok ) {
native_midi_ok = (getenv("SDL_NATIVE_MUSIC") != NULL);
}
if ( native_midi_ok )
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#endif
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native_midi_ok = native_midi_detect();
if ( native_midi_ok )
add_music_decoder("NATIVEMIDI");
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#endif
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#endif
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#ifdef OGG_MUSIC
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if ( OGG_init(mixer) == 0 ) {
add_music_decoder("OGG");
}
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#endif
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#ifdef FLAC_MUSIC
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if ( FLAC_init(mixer) == 0 ) {
add_music_decoder("FLAC");
}
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#endif
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#if defined(MP3_MUSIC) || defined(MP3_MAD_MUSIC)
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/* Keep a copy of the mixer */
used_mixer = *mixer;
add_music_decoder("MP3");
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#endif
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music_playing = NULL;
music_stopped = 0;
Mix_VolumeMusic(SDL_MIX_MAXVOLUME);
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/* Calculate the number of ms for each callback */
ms_per_step = (int) (((float)mixer->samples * 1000.0) / mixer->freq);
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return(0);
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}
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/* Portable case-insensitive string compare function */
int MIX_string_equals(const char *str1, const char *str2)
{
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while ( *str1 && *str2 ) {
if ( toupper((unsigned char)*str1) !=
toupper((unsigned char)*str2) )
break;
++str1;
++str2;
}
return (!*str1 && !*str2);
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}
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static int detect_mp3(Uint8 *magic)
{
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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;
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}
/* 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. */
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static Mix_MusicType detect_music_type(SDL_RWops *src)
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{
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Uint8 magic[5];
Uint8 moremagic[9];
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Sint64 start = SDL_RWtell(src);
if (SDL_RWread(src, magic, 1, 4) != 4 || SDL_RWread(src, moremagic, 1, 8) != 8 ) {
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Mix_SetError("Couldn't read from RWops");
return MUS_NONE;
}
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SDL_RWseek(src, start, RW_SEEK_SET);
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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;
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}
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/* Load a music file */
Mix_Music *Mix_LoadMUS(const char *file)
{
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SDL_RWops *src;
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Mix_Music *music;
Mix_MusicType type;
char *ext = strrchr(file, '.');
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#ifdef CMD_MUSIC
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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
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src = SDL_RWFromFile(file, "rb");
if ( src == NULL ) {
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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 ) {
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type = detect_music_type(src);
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}
/* We need to know if a specific error occurs; if not, we'll set a
* generic one, so we clear the current one. */
Mix_SetError("");
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music = Mix_LoadMUSType_RW(src, type, SDL_TRUE);
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if ( music == NULL && Mix_GetError()[0] == '\0' ) {
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Mix_SetError("Unrecognized music format");
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}
return music;
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}
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Mix_Music *Mix_LoadMUS_RW(SDL_RWops *src, int freesrc)
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{
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return Mix_LoadMUSType_RW(src, MUS_NONE, freesrc);
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}
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Mix_Music *Mix_LoadMUSType_RW(SDL_RWops *src, Mix_MusicType type, int freesrc)
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{
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Mix_Music *music;
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Sint64 start;
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if (!src) {
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Mix_SetError("RWops pointer is NULL");
return NULL;
}
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start = SDL_RWtell(src);
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/* If the caller wants auto-detection, figure out what kind of file
* this is. */
if (type == MUS_NONE) {
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if ((type = detect_music_type(src)) == MUS_NONE) {
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/* Don't call Mix_SetError() here since detect_music_type()
* does that. */
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if (freesrc) {
SDL_RWclose(src);
}
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return NULL;
}
}
/* Allocate memory for the music structure */
music = (Mix_Music *)SDL_malloc(sizeof(Mix_Music));
if (music == NULL ) {
Mix_SetError("Out of memory");
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if (freesrc) {
SDL_RWclose(src);
}
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return NULL;
}
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music->error = 1;
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switch (type) {
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#ifdef WAV_MUSIC
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case MUS_WAV:
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music->type = MUS_WAV;
music->data.wave = WAVStream_LoadSong_RW(src, freesrc);
if (music->data.wave) {
music->error = 0;
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}
break;
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#endif
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#ifdef OGG_MUSIC
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case MUS_OGG:
music->type = MUS_OGG;
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music->data.ogg = OGG_new_RW(src, freesrc);
if (music->data.ogg) {
music->error = 0;
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}
break;
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#endif
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#ifdef FLAC_MUSIC
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case MUS_FLAC:
music->type = MUS_FLAC;
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music->data.flac = FLAC_new_RW(src, freesrc);
if (music->data.flac) {
music->error = 0;
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}
break;
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#endif
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#ifdef MP3_MUSIC
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case MUS_MP3:
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if (Mix_Init(MIX_INIT_MP3)) {
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SMPEG_Info info;
music->type = MUS_MP3;
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music->data.mp3 = smpeg.SMPEG_new_rwops(src, &info, freesrc, 0);
if (!info.has_audio) {
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Mix_SetError("MPEG file does not have any audio stream.");
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smpeg.SMPEG_delete(music->data.mp3);
/* Deleting the MP3 closed the source if desired */
freesrc = SDL_FALSE;
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} else {
smpeg.SMPEG_actualSpec(music->data.mp3, &used_mixer);
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music->error = 0;
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}
}
break;
670
#elif defined(MP3_MAD_MUSIC)
671
672
case MUS_MP3:
music->type = MUS_MP3_MAD;
673
674
675
676
music->data.mp3_mad = mad_openFileRW(src, &used_mixer, freesrc);
if (music->data.mp3_mad) {
music->error = 0;
} else {
677
678
679
Mix_SetError("Could not initialize MPEG stream.");
}
break;
681
#ifdef MID_MUSIC
682
683
case MUS_MID:
music->type = MUS_MID;
684
#ifdef USE_NATIVE_MIDI
685
686
687
688
689
690
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 {
691
692
693
694
Mix_SetError("%s", native_midi_error());
}
break;
}
695
696
#endif
#ifdef USE_FLUIDSYNTH_MIDI
697
698
699
700
701
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;
702
703
704
}
break;
}
705
706
#endif
#ifdef USE_TIMIDITY_MIDI
707
708
709
710
711
712
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 {
713
714
715
716
717
718
719
Mix_SetError("%s", Timidity_Error());
}
} else {
Mix_SetError("%s", Timidity_Error());
}
#endif
break;
720
721
#endif
#if defined(MODPLUG_MUSIC) || defined(MOD_MUSIC)
722
case MUS_MOD:
723
#ifdef MODPLUG_MUSIC
724
725
if (music->error) {
SDL_RWseek(src, start, RW_SEEK_SET);
726
music->type = MUS_MODPLUG;
727
728
music->data.modplug = modplug_new_RW(src, freesrc);
if (music->data.modplug) {
729
730
731
music->error = 0;
}
}
732
#endif
733
#ifdef MOD_MUSIC
734
735
if (music->error) {
SDL_RWseek(src, start, RW_SEEK_SET);
736
music->type = MUS_MOD;
737
738
music->data.module = MOD_new_RW(src, freesrc);
if (music->data.module) {
739
740
741
music->error = 0;
}
}
742
#endif
743
break;
744
745
#endif
746
747
default:
Mix_SetError("Unrecognized music format");
748
break;
749
} /* switch (want) */
750
751
752
if (music->error) {
SDL_free(music);
753
754
755
756
757
758
if (freesrc) {
SDL_RWclose(src);
} else {
SDL_RWseek(src, start, RW_SEEK_SET);
}
music = NULL;
759
}
760
return music;
761
762
763
764
765
}
/* Free a music chunk previously loaded */
void Mix_FreeMusic(Mix_Music *music)
{
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
if ( music ) {
/* Stop the music if it's currently playing */
SDL_LockAudio();
if ( music == music_playing ) {
/* Wait for any fade out to finish */
while ( music->fading == MIX_FADING_OUT ) {
SDL_UnlockAudio();
SDL_Delay(100);
SDL_LockAudio();
}
if ( music == music_playing ) {
music_internal_halt();
}
}
SDL_UnlockAudio();
switch (music->type) {
782
#ifdef CMD_MUSIC
783
784
785
case MUS_CMD:
MusicCMD_FreeSong(music->data.cmd);
break;
786
787
#endif
#ifdef WAV_MUSIC
788
789
790
case MUS_WAV:
WAVStream_FreeSong(music->data.wave);
break;
791
#endif
792
#ifdef MODPLUG_MUSIC
793
794
795
case MUS_MODPLUG:
modplug_delete(music->data.modplug);
break;
796
#endif
797
#ifdef MOD_MUSIC
798
799
800
case MUS_MOD:
MOD_delete(music->data.module);
break;
801
802
#endif
#ifdef MID_MUSIC
803
case MUS_MID:
804
#ifdef USE_NATIVE_MIDI
805
806
807
808
if ( native_midi_ok ) {
native_midi_freesong(music->data.nativemidi);
goto skip;
}
809
810
#endif
#ifdef USE_FLUIDSYNTH_MIDI
811
812
813
814
if ( fluidsynth_ok ) {
fluidsynth_freesong(music->data.fluidsynthmidi);
goto skip;
}
815
#endif
816
#ifdef USE_TIMIDITY_MIDI
817
818
819
820
if ( timidity_ok ) {
Timidity_FreeSong(music->data.midi);
goto skip;
}
821
#endif
822
break;
823
#endif
824
#ifdef OGG_MUSIC
825
826
827
case MUS_OGG:
OGG_delete(music->data.ogg);
break;
828
#endif
829
#ifdef FLAC_MUSIC
830
831
832
case MUS_FLAC:
FLAC_delete(music->data.flac);
break;
833
#endif
834
#ifdef MP3_MUSIC
835
836
837
case MUS_MP3:
smpeg.SMPEG_delete(music->data.mp3);
break;
838
839
#endif
#ifdef MP3_MAD_MUSIC
840
841
842
case MUS_MP3_MAD:
mad_closeFile(music->data.mp3_mad);
break;
843
#endif
844
845
846
847
default:
/* Unknown music type?? */
break;
}
848
849
skip:
850
851
SDL_free(music);
}
852
853
}
854
855
856
857
858
/* 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)
{
859
860
861
862
863
864
865
866
867
868
869
870
Mix_MusicType type = MUS_NONE;
if ( music ) {
type = music->type;
} else {
SDL_LockAudio();
if ( music_playing ) {
type = music_playing->type;
}
SDL_UnlockAudio();
}
return(type);
871
872
}
873
874
875
/* Play a music chunk. Returns 0, or -1 if there was an error.
*/
static int music_internal_play(Mix_Music *music, double position)
876
{
877
int retval = 0;
878
879
#if defined(__MACOSX__) && defined(USE_NATIVE_MIDI)
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
/* 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) {
903
#ifdef CMD_MUSIC
904
905
906
case MUS_CMD:
MusicCMD_Start(music->data.cmd);
break;
907
908
#endif
#ifdef WAV_MUSIC
909
910
911
case MUS_WAV:
WAVStream_Start(music->data.wave);
break;
912
#endif
913
#ifdef MODPLUG_MUSIC
914
915
916
917
918
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;
919
#endif
920
#ifdef MOD_MUSIC
921
922
923
924
925
case MUS_MOD:
MOD_play(music->data.module);
/* Player_SetVolume() does nothing before Player_Start() */
music_internal_initialize_volume();
break;
926
927
#endif
#ifdef MID_MUSIC
928
case MUS_MID:
929
#ifdef USE_NATIVE_MIDI
930
931
932
933
if ( native_midi_ok ) {
native_midi_start(music->data.nativemidi, music_loops);
goto skip;
}
934
935
#endif
#ifdef USE_FLUIDSYNTH_MIDI
936
937
938
939
if (fluidsynth_ok ) {
fluidsynth_start(music->data.fluidsynthmidi);
goto skip;
}
940
#endif
941
#ifdef USE_TIMIDITY_MIDI
942
943
944
945
if ( timidity_ok ) {
Timidity_Start(music->data.midi);
goto skip;
}
946
#endif
947
break;
948
#endif
949
#ifdef OGG_MUSIC
950
951
952
case MUS_OGG:
OGG_play(music->data.ogg);
break;
953
#endif
954
#ifdef FLAC_MUSIC
955
956
957
case MUS_FLAC:
FLAC_play(music->data.flac);
break;
958
#endif
959
#ifdef MP3_MUSIC
960
961
962
963
964
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;
965
966
#endif
#ifdef MP3_MAD_MUSIC
967
968
969
case MUS_MP3_MAD:
mad_start(music->data.mp3_mad);
break;
970
#endif
971
972
973
974
975
default:
Mix_SetError("Can't play unknown music type");
retval = -1;
break;
}
976
977
skip:
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
/* 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);
995
996
}
int Mix_FadeInMusicPos(Mix_Music *music, int loops, int ms, double position)
997
{
998
999
1000
int retval;
if ( ms_per_step == 0 ) {