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music.c
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/*
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SDL_mixer: An audio mixer library based on the SDL library
Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
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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#include "music_mpg.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;
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union {
#ifdef CMD_MUSIC
MusicCMD *cmd;
#endif
#ifdef WAV_MUSIC
WAVStream *wave;
#endif
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#ifdef MODPLUG_MUSIC
modplug_data *modplug;
#endif
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#ifdef MOD_MUSIC
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
FluidSynthMidiSong *fluidsynthmidi;
#endif
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#ifdef USE_NATIVE_MIDI
NativeMidiSong *nativemidi;
#endif
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#endif
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#ifdef OGG_MUSIC
OGG_music *ogg;
#endif
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#ifdef MP3_MUSIC
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mpg_data *mp3_mpg;
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#endif
#ifdef MP3_MAD_MUSIC
mad_data *mp3_mad;
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#endif
#ifdef FLAC_MUSIC
FLAC_music *flac;
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#endif
} data;
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Mix_Fading fading;
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int fade_step;
int fade_steps;
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int error;
};
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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 */
char* soundfont_paths = NULL;
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int Mix_GetNumMusicDecoders(void)
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{
return(num_decoders);
}
const char *Mix_GetMusicDecoder(int index)
{
if ((index < 0) || (index >= num_decoders)) {
return NULL;
}
return(music_decoders[index]);
}
static void add_music_decoder(const char *decoder)
{
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void *ptr = SDL_realloc(music_decoders, (num_decoders + 1) * sizeof (const char *));
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if (ptr == NULL) {
return; /* oh well, go on without it. */
}
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music_decoders = (const char **) ptr;
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music_decoders[num_decoders++] = decoder;
}
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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 */
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static void (SDLCALL *music_finished_hook)(void) = NULL;
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void Mix_HookMusicFinished(void (SDLCALL *music_finished)(void))
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{
SDL_LockAudio();
music_finished_hook = music_finished;
SDL_UnlockAudio();
}
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/* If music isn't playing, halt it if no looping is required, restart it */
/* otherwhise. NOP if the music is playing */
static int music_halt_or_loop (void)
{
/* Restart music if it has to loop */
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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;
}
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#endif
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/* Restart music if it has to loop at a high level */
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if (music_loops) {
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Mix_Fading current_fade;
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if (music_loops > 0) {
--music_loops;
}
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current_fade = music_playing->fading;
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music_internal_play(music_playing, 0.0);
music_playing->fading = current_fade;
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} else {
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music_internal_halt();
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if (music_finished_hook) {
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music_finished_hook();
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}
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return 0;
}
}
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return 1;
}
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/* Mixing function */
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void SDLCALL music_mixer(void *udata, Uint8 *stream, int len)
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{
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int left = 0;
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if ( music_playing && music_active ) {
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/* Handle fading */
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if ( music_playing->fading != MIX_NO_FADING ) {
if ( music_playing->fade_step++ < music_playing->fade_steps ) {
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int volume;
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int fade_step = music_playing->fade_step;
int fade_steps = music_playing->fade_steps;
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if ( music_playing->fading == MIX_FADING_OUT ) {
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volume = (music_volume * (fade_steps-fade_step)) / fade_steps;
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} else { /* Fading in */
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volume = (music_volume * fade_step) / fade_steps;
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}
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music_internal_volume(volume);
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} else {
if ( music_playing->fading == MIX_FADING_OUT ) {
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music_internal_halt();
if ( music_finished_hook ) {
music_finished_hook();
}
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return;
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}
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music_playing->fading = MIX_NO_FADING;
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}
}
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music_halt_or_loop();
if (!music_internal_playing())
return;
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switch (music_playing->type) {
#ifdef CMD_MUSIC
case MUS_CMD:
/* The playing is done externally */
break;
#endif
#ifdef WAV_MUSIC
case MUS_WAV:
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left = WAVStream_PlaySome(stream, len);
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break;
#endif
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#ifdef MODPLUG_MUSIC
case MUS_MODPLUG:
left = modplug_playAudio(music_playing->data.modplug, stream, len);
break;
#endif
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#ifdef MOD_MUSIC
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case MUS_MOD:
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left = MOD_playAudio(music_playing->data.module, stream, len);
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break;
#endif
#ifdef MID_MUSIC
case MUS_MID:
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#ifdef USE_NATIVE_MIDI
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if ( native_midi_ok ) {
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/* Native midi is handled asynchronously */
goto skip;
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}
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#endif
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#ifdef USE_FLUIDSYNTH_MIDI
if ( fluidsynth_ok ) {
fluidsynth_playsome(music_playing->data.fluidsynthmidi, stream, len);
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goto skip;
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}
#endif
#ifdef USE_TIMIDITY_MIDI
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if ( timidity_ok ) {
int samples = len / samplesize;
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Timidity_PlaySome(stream, samples);
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goto skip;
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}
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#endif
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break;
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#endif
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#ifdef OGG_MUSIC
case MUS_OGG:
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left = OGG_playAudio(music_playing->data.ogg, stream, len);
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break;
#endif
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#ifdef FLAC_MUSIC
case MUS_FLAC:
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left = FLAC_playAudio(music_playing->data.flac, stream, len);
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break;
#endif
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#ifdef MP3_MUSIC
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case MUS_MP3:
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left = mpg_get_samples(music_playing->data.mp3_mpg, stream, len);
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break;
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#endif
#ifdef MP3_MAD_MUSIC
case MUS_MP3_MAD:
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left = mad_getSamples(music_playing->data.mp3_mad, stream, len);
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#endif
default:
/* Unknown music type?? */
break;
}
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}
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skip:
/* Handle seamless music looping */
if (left > 0 && left < len) {
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music_halt_or_loop();
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if (music_internal_playing())
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music_mixer(udata, stream+(len-left), left);
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}
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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 ) {
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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 ) {
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add_music_decoder("MODPLUG");
}
#endif
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#ifdef MOD_MUSIC
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if ( MOD_init(mixer) == 0 ) {
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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;
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if ( Timidity_Init(mixer->freq, mixer->format,
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mixer->channels, mixer->samples) == 0 ) {
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timidity_ok = 1;
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add_music_decoder("TIMIDITY");
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} else {
timidity_ok = 0;
}
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#endif
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#ifdef USE_FLUIDSYNTH_MIDI
if ( fluidsynth_init(mixer) == 0 ) {
fluidsynth_ok = 1;
add_music_decoder("FLUIDSYNTH");
} else {
fluidsynth_ok = 0;
}
#endif
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#ifdef USE_NATIVE_MIDI
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#ifdef USE_FLUIDSYNTH_MIDI
native_midi_ok = !fluidsynth_ok;
if ( native_midi_ok )
#endif
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#ifdef USE_TIMIDITY_MIDI
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native_midi_ok = !timidity_ok;
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if ( !native_midi_ok ) {
native_midi_ok = (getenv("SDL_NATIVE_MUSIC") != NULL);
}
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if ( native_midi_ok )
#endif
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native_midi_ok = native_midi_detect();
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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 ) {
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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 ) {
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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;
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add_music_decoder("MP3");
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#endif
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music_playing = NULL;
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music_stopped = 0;
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Mix_VolumeMusic(SDL_MIX_MAXVOLUME);
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/* Calculate the number of ms for each callback */
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ms_per_step = (int) (((float)mixer->samples * 1000.0) / mixer->freq);
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return(0);
}
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/* Portable case-insensitive string compare function */
int MIX_string_equals(const char *str1, const char *str2)
{
while ( *str1 && *str2 ) {
if ( toupper((unsigned char)*str1) !=
toupper((unsigned char)*str2) )
break;
++str1;
++str2;
}
return (!*str1 && !*str2);
}
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static int detect_mp3(Uint8 *magic)
{
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;
}
/* 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. */
static Mix_MusicType detect_music_type(SDL_RWops *rw)
{
Uint8 magic[5];
Uint8 moremagic[9];
int start = SDL_RWtell(rw);
if (SDL_RWread(rw, magic, 1, 4) != 4 || SDL_RWread(rw, moremagic, 1, 8) != 8 ) {
Mix_SetError("Couldn't read from RWops");
return MUS_NONE;
}
SDL_RWseek(rw, start, RW_SEEK_SET);
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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/* Load a music file */
Mix_Music *Mix_LoadMUS(const char *file)
{
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SDL_RWops *rw;
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Mix_Music *music;
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Mix_MusicType type;
char *ext = strrchr(file, '.');
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#ifdef CMD_MUSIC
if ( music_cmd ) {
/* Allocate memory for the music structure */
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music = (Mix_Music *)SDL_malloc(sizeof(Mix_Music));
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if ( music == NULL ) {
Mix_SetError("Out of memory");
return(NULL);
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}
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music->error = 0;
music->type = MUS_CMD;
music->data.cmd = MusicCMD_LoadSong(music_cmd, file);
if ( music->data.cmd == NULL ) {
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SDL_free(music);
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music = NULL;
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}
return music;
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}
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#endif
rw = SDL_RWFromFile(file, "rb");
if ( rw == NULL ) {
Mix_SetError("Couldn't open '%s'", file);
return NULL;
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}
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/* Use the extension as a first guess on the file type */
type = MUS_NONE;
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ext = strrchr(file, '.');
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/* 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 ) {
type = detect_music_type(rw);
}
/* 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("");
music = Mix_LoadMUSType_RW(rw, type, SDL_TRUE);
if ( music == NULL && Mix_GetError()[0] == '\0' ) {
SDL_FreeRW(rw);
Mix_SetError("Couldn't open '%s'", file);
}
return music;
}
Mix_Music *Mix_LoadMUS_RW(SDL_RWops *rw)
{
return Mix_LoadMUSType_RW(rw, MUS_NONE, SDL_FALSE);
}
Mix_Music *Mix_LoadMUSType_RW(SDL_RWops *rw, Mix_MusicType type, int freesrc)
{
Mix_Music *music;
if (!rw) {
Mix_SetError("RWops pointer is NULL");
return NULL;
}
/* If the caller wants auto-detection, figure out what kind of file
* this is. */
if (type == MUS_NONE) {
if ((type = detect_music_type(rw)) == MUS_NONE) {
/* Don't call Mix_SetError() here since detect_music_type()
* does that. */
return NULL;
}
}
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/* Allocate memory for the music structure */
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music = (Mix_Music *)SDL_malloc(sizeof(Mix_Music));
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if (music == NULL ) {
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Mix_SetError("Out of memory");
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return NULL;
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}
music->error = 0;
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switch (type) {
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#ifdef WAV_MUSIC
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case MUS_WAV:
/* The WAVE loader needs the first 4 bytes of the header */
{
Uint8 magic[5];
int start = SDL_RWtell(rw);
if (SDL_RWread(rw, magic, 1, 4) != 4) {
Mix_SetError("Couldn't read from RWops");
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SDL_free(music);
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return NULL;
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}
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SDL_RWseek(rw, start, RW_SEEK_SET);
magic[4] = '\0';
music->type = MUS_WAV;
music->data.wave = WAVStream_LoadSong_RW(rw, (char *)magic, freesrc);
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}
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if (music->data.wave == NULL) {
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music->error = 1;
}
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break;
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#endif
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#ifdef OGG_MUSIC
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case MUS_OGG:
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music->type = MUS_OGG;
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music->data.ogg = OGG_new_RW(rw, freesrc);
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if ( music->data.ogg == NULL ) {
music->error = 1;
}
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break;
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#endif
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#ifdef FLAC_MUSIC
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case MUS_FLAC:
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music->type = MUS_FLAC;
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music->data.flac = FLAC_new_RW(rw, freesrc);
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if ( music->data.flac == NULL ) {
music->error = 1;
}
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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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music->type = MUS_MP3;
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music->data.mp3_mpg = mpg_new_rw(rw, &used_mixer, freesrc);
if (!music->data.mp3_mpg) {
Mix_SetError("Could not initialize MPEG stream.");
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music->error = 1;
}
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} else {
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music->error = 1;
662
}
663
664
665
break;
#elif defined(MP3_MAD_MUSIC)
case MUS_MP3:
666
music->type = MUS_MP3_MAD;
667
music->data.mp3_mad = mad_openFileRW(rw, &used_mixer, freesrc);
668
if (music->data.mp3_mad == 0) {
669
Mix_SetError("Could not initialize MPEG stream.");
670
671
music->error = 1;
}
672
break;
674
675
676
677
678
679
#ifdef MID_MUSIC
case MUS_MID:
music->type = MUS_MID;
#ifdef USE_NATIVE_MIDI
if ( native_midi_ok ) {
music->data.nativemidi = native_midi_loadsong_RW(rw, freesrc);
680
681
682
if ( music->data.nativemidi == NULL ) {
Mix_SetError("%s", native_midi_error());
music->error = 1;
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
}
break;
}
#endif
#ifdef USE_FLUIDSYNTH_MIDI
if ( fluidsynth_ok ) {
music->data.fluidsynthmidi = fluidsynth_loadsong_RW(rw, freesrc);
if ( music->data.fluidsynthmidi == NULL ) {
music->error = 1;
}
break;
}
#endif
#ifdef USE_TIMIDITY_MIDI
if ( timidity_ok ) {
music->data.midi = Timidity_LoadSong_RW(rw, freesrc);
if ( music->data.midi == NULL ) {
Mix_SetError("%s", Timidity_Error());
music->error = 1;
}
} else {
Mix_SetError("%s", Timidity_Error());
705
706
music->error = 1;
}
707
708
709
710
711
712
713
714
715
716
717
718
719
720
#endif
break;
#endif
#if defined(MODPLUG_MUSIC) || defined(MOD_MUSIC)
case MUS_MOD:
music->error = 1;
#ifdef MODPLUG_MUSIC
if ( music->error ) {
music->type = MUS_MODPLUG;
music->data.modplug = modplug_new_RW(rw, freesrc);
if ( music->data.modplug ) {
music->error = 0;
}
}
721
#endif
722
#ifdef MOD_MUSIC
723
724
725
726
727
728
if ( music->error ) {
music->type = MUS_MOD;
music->data.module = MOD_new_RW(rw, freesrc);
if ( music->data.module ) {
music->error = 0;
}
729
730
}
#endif
731
732
733
734
break;
#endif
default:
735
Mix_SetError("Unrecognized music format");
736
music->error = 1;
737
} /* switch (want) */
738
739
if (music->error) {
740
SDL_free(music);
741
music = NULL;
742
743
744
745
746
747
748
749
}
return(music);
}
/* Free a music chunk previously loaded */
void Mix_FreeMusic(Mix_Music *music)
{
if ( music ) {
750
751
752
753
754
755
756
757
758
759
760
/* 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();
761
}
762
}
763
SDL_UnlockAudio();
764
765
766
767
768
769
770
771
772
773
774
switch (music->type) {
#ifdef CMD_MUSIC
case MUS_CMD:
MusicCMD_FreeSong(music->data.cmd);
break;
#endif
#ifdef WAV_MUSIC
case MUS_WAV:
WAVStream_FreeSong(music->data.wave);
break;
#endif
775
776
777
778
779
#ifdef MODPLUG_MUSIC
case MUS_MODPLUG:
modplug_delete(music->data.modplug);
break;
#endif
780
#ifdef MOD_MUSIC
781
case MUS_MOD:
782
MOD_delete(music->data.module);
783
784
785
786
break;
#endif
#ifdef MID_MUSIC
case MUS_MID:
787
#ifdef USE_NATIVE_MIDI
788
if ( native_midi_ok ) {
789
native_midi_freesong(music->data.nativemidi);
790
791
792
793
794
795
796
797
goto skip;
}
#endif
#ifdef USE_FLUIDSYNTH_MIDI
if ( fluidsynth_ok ) {
fluidsynth_freesong(music->data.fluidsynthmidi);
goto skip;
}
798
#endif
799
#ifdef USE_TIMIDITY_MIDI
800
801
if ( timidity_ok ) {
Timidity_FreeSong(music->data.midi);
802
goto skip;
803
}
804
#endif
805
806
break;
#endif
807
808
809
810
811
#ifdef OGG_MUSIC
case MUS_OGG:
OGG_delete(music->data.ogg);
break;
#endif
812
813
814
815
816
#ifdef FLAC_MUSIC
case MUS_FLAC:
FLAC_delete(music->data.flac);
break;
#endif
817
#ifdef MP3_MUSIC
818
case MUS_MP3:
819
mpg_delete(music->data.mp3_mpg);
820
break;
821
822
823
824
825
#endif
#ifdef MP3_MAD_MUSIC
case MUS_MP3_MAD:
mad_closeFile(music->data.mp3_mad);
break;
826
827
828
829
830
#endif
default:
/* Unknown music type?? */
break;
}
831
832
skip:
833
SDL_free(music);
834
835
836
}
}
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
/* 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)
{
Mix_MusicType type = MUS_NONE;
if ( music ) {
type = music->type;
} else {
SDL_LockAudio();
if ( music_playing ) {
type = music_playing->type;
}
SDL_UnlockAudio();
}
return(type);
}
856
857
858
/* Play a music chunk. Returns 0, or -1 if there was an error.
*/
static int music_internal_play(Mix_Music *music, double position)
859
{
860
861
int retval = 0;
862
#if defined(__MACOSX__) && defined(USE_NATIVE_MIDI)
863
864
/* This fixes a bug with native MIDI on Mac OS X, where you
can't really stop and restart MIDI from the audio callback.
865
*/
866
867
868
869
if ( music == music_playing && music->type == MUS_MID && native_midi_ok ) {
/* Just a seek suffices to restart playing */
music_internal_position(position);
return 0;
870
}
871
#endif
872
873
874
875
876
877
/* Note the music we're playing */
if ( music_playing ) {
music_internal_halt();
}
music_playing = music;
878
879
/* Set the initial volume */
880
881
if ( music->type != MUS_MOD ) {
music_internal_initialize_volume();
882
883
884
}
/* Set up for playback */
885
886
switch (music->type) {
#ifdef CMD_MUSIC
887
888
889
case MUS_CMD:
MusicCMD_Start(music->data.cmd);
break;
890
891
#endif
#ifdef WAV_MUSIC
892
893
894
case MUS_WAV:
WAVStream_Start(music->data.wave);
break;
895
#endif
896
897
898
899
900
901
902
#ifdef MODPLUG_MUSIC
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;
#endif
903
#ifdef MOD_MUSIC
904
case MUS_MOD:
905
MOD_play(music->data.module);
906
907
/* Player_SetVolume() does nothing before Player_Start() */
music_internal_initialize_volume();
908
break;
909
910
#endif
#ifdef MID_MUSIC
911
case MUS_MID:
912
#ifdef USE_NATIVE_MIDI
913
if ( native_midi_ok ) {
914
native_midi_start(music->data.nativemidi, music_loops);
915
916
917
918
919
920
921
922
goto skip;
}
#endif
#ifdef USE_FLUIDSYNTH_MIDI
if (fluidsynth_ok ) {
fluidsynth_start(music->data.fluidsynthmidi);
goto skip;
}
923
#endif
924
#ifdef USE_TIMIDITY_MIDI
925
926
if ( timidity_ok ) {
Timidity_Start(music->data.midi);
927
goto skip;
928
}
929
#endif
930
break;
931
#endif
932
#ifdef OGG_MUSIC
933
934
935
case MUS_OGG:
OGG_play(music->data.ogg);
break;
936
#endif
937
938
939
940
941
#ifdef FLAC_MUSIC
case MUS_FLAC:
FLAC_play(music->data.flac);
break;
#endif
942
#ifdef MP3_MUSIC
943
case MUS_MP3:
944
mpg_start(music->data.mp3_mpg);
945
break;
946
947
948
949
950
#endif
#ifdef MP3_MAD_MUSIC
case MUS_MP3_MAD:
mad_start(music->data.mp3_mad);
break;
951
#endif
952
953
954
955
default:
Mix_SetError("Can't play unknown music type");
retval = -1;
break;
956
}
957
958
skip:
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
/* 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);
}
int Mix_FadeInMusicPos(Mix_Music *music, int loops, int ms, double position)
978
{
979
980
int retval;
981
982
983
984
985
if ( ms_per_step == 0 ) {
SDL_SetError("Audio device hasn't been opened");
return(-1);
}
986
987
/* Don't play null pointers :-) */
if ( music == NULL ) {
988
Mix_SetError("music parameter was NULL");
989
990
return(-1);
}
991
992
993
994
995
996
/* Setup the data */
if ( ms ) {
music->fading = MIX_FADING_IN;
} else {
music->fading = MIX_NO_FADING;
997
}
998
999
music->fade_step = 0;
music->fade_steps = ms/ms_per_step;
1000