music.c
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上传日期:2022-07-21
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文件大小:29k
- /*
- SDL_mixer: An audio mixer library based on the SDL library
- Copyright (C) 1997-2009 Sam Lantinga
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Sam Lantinga
- slouken@libsdl.org
- */
- /* $Id: music.c 5247 2009-11-14 20:44:30Z slouken $ */
- #include <stdlib.h>
- #include <string.h>
- #include <ctype.h>
- #include <assert.h>
- #include "SDL_endian.h"
- #include "SDL_audio.h"
- #include "SDL_timer.h"
- #include "SDL_mixer.h"
- #ifdef CMD_MUSIC
- #include "music_cmd.h"
- #endif
- #ifdef WAV_MUSIC
- #include "wavestream.h"
- #endif
- #ifdef MOD_MUSIC
- #include "music_mod.h"
- #endif
- #ifdef MID_MUSIC
- # ifdef USE_TIMIDITY_MIDI
- # include "timidity.h"
- # endif
- # ifdef USE_NATIVE_MIDI
- # include "native_midi.h"
- # endif
- # if defined(USE_TIMIDITY_MIDI) && defined(USE_NATIVE_MIDI)
- # define MIDI_ELSE else
- # else
- # define MIDI_ELSE
- # endif
- #endif
- #ifdef OGG_MUSIC
- #include "music_ogg.h"
- #endif
- #ifdef MP3_MUSIC
- #include "dynamic_mp3.h"
- #endif
- #ifdef MP3_MAD_MUSIC
- #include "music_mad.h"
- #endif
- #ifdef FLAC_MUSIC
- #include "music_flac.h"
- #endif
- #if defined(MP3_MUSIC) || defined(MP3_MAD_MUSIC)
- static SDL_AudioSpec used_mixer;
- #endif
- int volatile music_active = 1;
- static int volatile music_stopped = 0;
- static int music_loops = 0;
- static char *music_cmd = NULL;
- static Mix_Music * volatile music_playing = NULL;
- static int music_volume = MIX_MAX_VOLUME;
- struct _Mix_Music {
- Mix_MusicType type;
- union {
- #ifdef CMD_MUSIC
- MusicCMD *cmd;
- #endif
- #ifdef WAV_MUSIC
- WAVStream *wave;
- #endif
- #ifdef MOD_MUSIC
- struct MODULE *module;
- #endif
- #ifdef MID_MUSIC
- #ifdef USE_TIMIDITY_MIDI
- MidiSong *midi;
- #endif
- #ifdef USE_NATIVE_MIDI
- NativeMidiSong *nativemidi;
- #endif
- #endif
- #ifdef OGG_MUSIC
- OGG_music *ogg;
- #endif
- #ifdef MP3_MUSIC
- SMPEG *mp3;
- #endif
- #ifdef MP3_MAD_MUSIC
- mad_data *mp3_mad;
- #endif
- #ifdef FLAC_MUSIC
- FLAC_music *flac;
- #endif
- } data;
- Mix_Fading fading;
- int fade_step;
- int fade_steps;
- int error;
- };
- #ifdef MID_MUSIC
- #ifdef USE_TIMIDITY_MIDI
- static int timidity_ok;
- static int samplesize;
- #endif
- #ifdef USE_NATIVE_MIDI
- static int native_midi_ok;
- #endif
- #endif
- /* Used to calculate fading steps */
- static int ms_per_step;
- /* rcg06042009 report available decoders at runtime. */
- static const char **music_decoders = NULL;
- static int num_decoders = 0;
- int Mix_GetNumMusicDecoders(void)
- {
- 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)
- {
- void *ptr = realloc(music_decoders, (num_decoders + 1) * sizeof (const char **));
- if (ptr == NULL) {
- return; /* oh well, go on without it. */
- }
- music_decoders = (const char **) ptr;
- music_decoders[num_decoders++] = decoder;
- }
- /* Local low-level functions prototypes */
- static void music_internal_initialize_volume(void);
- 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);
- /* Support for hooking when the music has finished */
- static void (*music_finished_hook)(void) = NULL;
- void Mix_HookMusicFinished(void (*music_finished)(void))
- {
- SDL_LockAudio();
- music_finished_hook = music_finished;
- SDL_UnlockAudio();
- }
- /* 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 */
-
- if (!music_internal_playing())
- {
- /* Restart music if it has to loop at a high level */
- if (music_loops && --music_loops)
- {
- Mix_Fading 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;
- }
- /* Mixing function */
- void music_mixer(void *udata, Uint8 *stream, int len)
- {
- 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;
- }
- }
-
- if (music_halt_or_loop() == 0)
- return;
-
-
- switch (music_playing->type) {
- #ifdef CMD_MUSIC
- case MUS_CMD:
- /* The playing is done externally */
- break;
- #endif
- #ifdef WAV_MUSIC
- case MUS_WAV:
- left = WAVStream_PlaySome(stream, len);
- break;
- #endif
- #ifdef MOD_MUSIC
- case MUS_MOD:
- left = MOD_playAudio(music_playing->data.module, stream, len);
- break;
- #endif
- #ifdef MID_MUSIC
- #ifdef USE_TIMIDITY_MIDI
- case MUS_MID:
- if ( timidity_ok ) {
- int samples = len / samplesize;
- Timidity_PlaySome(stream, samples);
- }
- break;
- #endif
- #endif
- #ifdef OGG_MUSIC
- case MUS_OGG:
-
- left = OGG_playAudio(music_playing->data.ogg, stream, len);
- break;
- #endif
- #ifdef FLAC_MUSIC
- case MUS_FLAC:
- left = FLAC_playAudio(music_playing->data.flac, stream, len);
- break;
- #endif
- #ifdef MP3_MUSIC
- case MUS_MP3:
- left = (len - smpeg.SMPEG_playAudio(music_playing->data.mp3, stream, len));
- break;
- #endif
- #ifdef MP3_MAD_MUSIC
- case MUS_MP3_MAD:
- left = mad_getSamples(music_playing->data.mp3_mad, stream, len);
- break;
- #endif
- default:
- /* Unknown music type?? */
- break;
- }
- }
- /* Handle seamless music looping */
- if (left > 0 && left < len && music_halt_or_loop()) {
- music_mixer(udata, stream+(len-left), left);
- }
- }
- /* Initialize the music players with a certain desired audio format */
- int open_music(SDL_AudioSpec *mixer)
- {
- #ifdef WAV_MUSIC
- if ( WAVStream_Init(mixer) == 0 ) {
- add_music_decoder("WAVE");
- }
- #endif
- #ifdef MOD_MUSIC
- if ( MOD_init(mixer) == 0 ) {
- add_music_decoder("MIKMOD");
- }
- #endif
- #ifdef MID_MUSIC
- #ifdef USE_TIMIDITY_MIDI
- 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;
- }
- #endif
- #ifdef USE_NATIVE_MIDI
- #ifdef USE_TIMIDITY_MIDI
- native_midi_ok = !timidity_ok;
- if ( !native_midi_ok ) {
- native_midi_ok = (getenv("SDL_NATIVE_MUSIC") != NULL);
- }
- if ( native_midi_ok )
- #endif
- native_midi_ok = native_midi_detect();
- if ( native_midi_ok )
- add_music_decoder("NATIVEMIDI");
- #endif
- #endif
- #ifdef OGG_MUSIC
- if ( OGG_init(mixer) == 0 ) {
- add_music_decoder("OGG");
- }
- #endif
- #ifdef FLAC_MUSIC
- if ( FLAC_init(mixer) == 0 ) {
- add_music_decoder("FLAC");
- }
- #endif
- #if defined(MP3_MUSIC) || defined(MP3_MAD_MUSIC)
- /* Keep a copy of the mixer */
- used_mixer = *mixer;
- add_music_decoder("MP3");
- #endif
- music_playing = NULL;
- music_stopped = 0;
- Mix_VolumeMusic(SDL_MIX_MAXVOLUME);
- /* Calculate the number of ms for each callback */
- ms_per_step = (int) (((float)mixer->samples * 1000.0) / mixer->freq);
- return(0);
- }
- /* 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);
- }
- /* Load a music file */
- Mix_Music *Mix_LoadMUS(const char *file)
- {
- FILE *fp;
- char *ext;
- Uint8 magic[5], moremagic[9];
- Mix_Music *music;
- /* Figure out what kind of file this is */
- fp = fopen(file, "rb");
- if ( (fp == NULL) || !fread(magic, 4, 1, fp) ) {
- if ( fp != NULL ) {
- fclose(fp);
- }
- Mix_SetError("Couldn't read from '%s'", file);
- return(NULL);
- }
- if (!fread(moremagic, 8, 1, fp)) {
- Mix_SetError("Couldn't read from '%s'", file);
- return(NULL);
- }
- magic[4] = ' ';
- moremagic[8] = ' ';
- fclose(fp);
- /* Figure out the file extension, so we can determine the type */
- ext = strrchr(file, '.');
- if ( ext ) ++ext; /* skip the dot in the extension */
- /* Allocate memory for the music structure */
- music = (Mix_Music *)malloc(sizeof(Mix_Music));
- if ( music == NULL ) {
- Mix_SetError("Out of memory");
- return(NULL);
- }
- music->error = 0;
- #ifdef CMD_MUSIC
- if ( music_cmd ) {
- music->type = MUS_CMD;
- music->data.cmd = MusicCMD_LoadSong(music_cmd, file);
- if ( music->data.cmd == NULL ) {
- music->error = 1;
- }
- } else
- #endif
- #ifdef WAV_MUSIC
- /* WAVE files have the magic four bytes "RIFF"
- AIFF files have the magic 12 bytes "FORM" XXXX "AIFF"
- */
- if ( (ext && MIX_string_equals(ext, "WAV")) ||
- ((strcmp((char *)magic, "RIFF") == 0) && (strcmp((char *)(moremagic+4), "WAVE") == 0)) ||
- (strcmp((char *)magic, "FORM") == 0) ) {
- music->type = MUS_WAV;
- music->data.wave = WAVStream_LoadSong(file, (char *)magic);
- if ( music->data.wave == NULL ) {
- Mix_SetError("Unable to load WAV file");
- music->error = 1;
- }
- } else
- #endif
- #ifdef MID_MUSIC
- /* MIDI files have the magic four bytes "MThd" */
- if ( (ext && MIX_string_equals(ext, "MID")) ||
- (ext && MIX_string_equals(ext, "MIDI")) ||
- strcmp((char *)magic, "MThd") == 0 ||
- ( strcmp((char *)magic, "RIFF") == 0 &&
- strcmp((char *)(moremagic+4), "RMID") == 0 ) ) {
- music->type = MUS_MID;
- #ifdef USE_NATIVE_MIDI
- if ( native_midi_ok ) {
- music->data.nativemidi = native_midi_loadsong(file);
- if ( music->data.nativemidi == NULL ) {
- Mix_SetError("%s", native_midi_error());
- music->error = 1;
- }
- } MIDI_ELSE
- #endif
- #ifdef USE_TIMIDITY_MIDI
- if ( timidity_ok ) {
- music->data.midi = Timidity_LoadSong(file);
- if ( music->data.midi == NULL ) {
- Mix_SetError("%s", Timidity_Error());
- music->error = 1;
- }
- } else {
- Mix_SetError("%s", Timidity_Error());
- music->error = 1;
- }
- #endif
- } else
- #endif
- #ifdef OGG_MUSIC
- /* Ogg Vorbis files have the magic four bytes "OggS" */
- if ( (ext && MIX_string_equals(ext, "OGG")) ||
- strcmp((char *)magic, "OggS") == 0 ) {
- music->type = MUS_OGG;
- music->data.ogg = OGG_new(file);
- if ( music->data.ogg == NULL ) {
- music->error = 1;
- }
- } else
- #endif
- #ifdef FLAC_MUSIC
- /* FLAC files have the magic four bytes "fLaC" */
- if ( (ext && MIX_string_equals(ext, "FLAC")) ||
- strcmp((char *)magic, "fLaC") == 0 ) {
- music->type = MUS_FLAC;
- music->data.flac = FLAC_new(file);
- if ( music->data.flac == NULL ) {
- music->error = 1;
- }
- } else
- #endif
- #ifdef MP3_MUSIC
- if ( (ext && MIX_string_equals(ext, "MPG")) ||
- (ext && MIX_string_equals(ext, "MP3")) ||
- (ext && MIX_string_equals(ext, "MPEG")) ||
- (magic[0] == 0xFF && (magic[1] & 0xF0) == 0xF0) ||
- (strncmp((char *)magic, "ID3", 3) == 0) ) {
- if ( Mix_Init(MIX_INIT_MP3) ) {
- SMPEG_Info info;
- music->type = MUS_MP3;
- music->data.mp3 = smpeg.SMPEG_new(file, &info, 0);
- if ( !info.has_audio ) {
- Mix_SetError("MPEG file does not have any audio stream.");
- music->error = 1;
- } else {
- smpeg.SMPEG_actualSpec(music->data.mp3, &used_mixer);
- }
- } else {
- music->error = 1;
- }
- } else
- #endif
- #ifdef MP3_MAD_MUSIC
- if ( (ext && MIX_string_equals(ext, "MPG")) ||
- (ext && MIX_string_equals(ext, "MP3")) ||
- (ext && MIX_string_equals(ext, "MPEG")) ||
- (ext && MIX_string_equals(ext, "MAD")) ||
- (magic[0] == 0xFF && (magic[1] & 0xF0) == 0xF0) ||
- (strncmp((char *)magic, "ID3", 3) == 0) ) {
- music->type = MUS_MP3_MAD;
- music->data.mp3_mad = mad_openFile(file, &used_mixer);
- if (music->data.mp3_mad == 0) {
- Mix_SetError("Could not initialize MPEG stream.");
- music->error = 1;
- }
- } else
- #endif
- #ifdef MOD_MUSIC
- if ( 1 ) {
- music->type = MUS_MOD;
- music->data.module = MOD_new(file);
- if ( music->data.module == NULL ) {
- music->error = 1;
- }
- } else
- #endif
- {
- Mix_SetError("Unrecognized music format");
- music->error = 1;
- }
- if ( music->error ) {
- free(music);
- music = NULL;
- }
- return(music);
- }
- /* Free a music chunk previously loaded */
- void Mix_FreeMusic(Mix_Music *music)
- {
- 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) {
- #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
- #ifdef MOD_MUSIC
- case MUS_MOD:
- MOD_delete(music->data.module);
- break;
- #endif
- #ifdef MID_MUSIC
- case MUS_MID:
- #ifdef USE_NATIVE_MIDI
- if ( native_midi_ok ) {
- native_midi_freesong(music->data.nativemidi);
- } MIDI_ELSE
- #endif
- #ifdef USE_TIMIDITY_MIDI
- if ( timidity_ok ) {
- Timidity_FreeSong(music->data.midi);
- }
- #endif
- break;
- #endif
- #ifdef OGG_MUSIC
- case MUS_OGG:
- OGG_delete(music->data.ogg);
- break;
- #endif
- #ifdef FLAC_MUSIC
- case MUS_FLAC:
- FLAC_delete(music->data.flac);
- break;
- #endif
- #ifdef MP3_MUSIC
- case MUS_MP3:
- smpeg.SMPEG_delete(music->data.mp3);
- break;
- #endif
- #ifdef MP3_MAD_MUSIC
- case MUS_MP3_MAD:
- mad_closeFile(music->data.mp3_mad);
- break;
- #endif
- default:
- /* Unknown music type?? */
- break;
- }
- free(music);
- }
- }
- /* 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);
- }
- /* Play a music chunk. Returns 0, or -1 if there was an error.
- */
- static int music_internal_play(Mix_Music *music, double position)
- {
- int retval = 0;
- /* 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) {
- #ifdef CMD_MUSIC
- case MUS_CMD:
- MusicCMD_Start(music->data.cmd);
- break;
- #endif
- #ifdef WAV_MUSIC
- case MUS_WAV:
- WAVStream_Start(music->data.wave);
- break;
- #endif
- #ifdef MOD_MUSIC
- case MUS_MOD:
- MOD_play(music->data.module);
- /* Player_SetVolume() does nothing before Player_Start() */
- music_internal_initialize_volume();
- break;
- #endif
- #ifdef MID_MUSIC
- case MUS_MID:
- #ifdef USE_NATIVE_MIDI
- if ( native_midi_ok ) {
- native_midi_start(music->data.nativemidi);
- } MIDI_ELSE
- #endif
- #ifdef USE_TIMIDITY_MIDI
- if ( timidity_ok ) {
- Timidity_Start(music->data.midi);
- }
- #endif
- break;
- #endif
- #ifdef OGG_MUSIC
- case MUS_OGG:
- OGG_play(music->data.ogg);
- break;
- #endif
- #ifdef FLAC_MUSIC
- case MUS_FLAC:
- FLAC_play(music->data.flac);
- break;
- #endif
- #ifdef MP3_MUSIC
- 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;
- #endif
- #ifdef MP3_MAD_MUSIC
- case MUS_MP3_MAD:
- mad_start(music->data.mp3_mad);
- break;
- #endif
- default:
- Mix_SetError("Can't play unknown music type");
- retval = -1;
- break;
- }
- /* 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)
- {
- int retval;
- /* Don't play null pointers :-) */
- if ( music == NULL ) {
- Mix_SetError("music parameter was NULL");
- return(-1);
- }
- /* Setup the data */
- if ( ms ) {
- music->fading = MIX_FADING_IN;
- } else {
- music->fading = MIX_NO_FADING;
- }
- music->fade_step = 0;
- music->fade_steps = ms/ms_per_step;
- /* Play the puppy */
- SDL_LockAudio();
- /* If the current music is fading out, wait for the fade to complete */
- while ( music_playing && (music_playing->fading == MIX_FADING_OUT) ) {
- SDL_UnlockAudio();
- SDL_Delay(100);
- SDL_LockAudio();
- }
- music_active = 1;
- music_loops = loops;
- retval = music_internal_play(music, position);
- SDL_UnlockAudio();
- return(retval);
- }
- int Mix_FadeInMusic(Mix_Music *music, int loops, int ms)
- {
- return Mix_FadeInMusicPos(music, loops, ms, 0.0);
- }
- int Mix_PlayMusic(Mix_Music *music, int loops)
- {
- return Mix_FadeInMusicPos(music, loops, 0, 0.0);
- }
- /* Set the playing music position */
- int music_internal_position(double position)
- {
- int retval = 0;
- switch (music_playing->type) {
- #ifdef MOD_MUSIC
- case MUS_MOD:
- MOD_jump_to_time(music_playing->data.module, position);
- break;
- #endif
- #ifdef OGG_MUSIC
- case MUS_OGG:
- OGG_jump_to_time(music_playing->data.ogg, position);
- break;
- #endif
- #ifdef FLAC_MUSIC
- case MUS_FLAC:
- FLAC_jump_to_time(music_playing->data.flac, position);
- break;
- #endif
- #ifdef MP3_MUSIC
- case MUS_MP3:
- if ( position > 0.0 ) {
- smpeg.SMPEG_skip(music_playing->data.mp3, (float)position);
- } else {
- smpeg.SMPEG_rewind(music_playing->data.mp3);
- smpeg.SMPEG_play(music_playing->data.mp3);
- }
- break;
- #endif
- #ifdef MP3_MAD_MUSIC
- case MUS_MP3_MAD:
- mad_seek(music_playing->data.mp3_mad, position);
- break;
- #endif
- default:
- /* TODO: Implement this for other music backends */
- retval = -1;
- break;
- }
- return(retval);
- }
- int Mix_SetMusicPosition(double position)
- {
- int retval;
- SDL_LockAudio();
- if ( music_playing ) {
- retval = music_internal_position(position);
- if ( retval < 0 ) {
- Mix_SetError("Position not implemented for music type");
- }
- } else {
- Mix_SetError("Music isn't playing");
- retval = -1;
- }
- SDL_UnlockAudio();
- return(retval);
- }
- /* Set the music's initial volume */
- static void music_internal_initialize_volume(void)
- {
- if ( music_playing->fading == MIX_FADING_IN ) {
- music_internal_volume(0);
- } else {
- music_internal_volume(music_volume);
- }
- }
- /* Set the music volume */
- static void music_internal_volume(int volume)
- {
- switch (music_playing->type) {
- #ifdef CMD_MUSIC
- case MUS_CMD:
- MusicCMD_SetVolume(volume);
- break;
- #endif
- #ifdef WAV_MUSIC
- case MUS_WAV:
- WAVStream_SetVolume(volume);
- break;
- #endif
- #ifdef MOD_MUSIC
- case MUS_MOD:
- MOD_setvolume(music_playing->data.module, volume);
- break;
- #endif
- #ifdef MID_MUSIC
- case MUS_MID:
- #ifdef USE_NATIVE_MIDI
- if ( native_midi_ok ) {
- native_midi_setvolume(volume);
- } MIDI_ELSE
- #endif
- #ifdef USE_TIMIDITY_MIDI
- if ( timidity_ok ) {
- Timidity_SetVolume(volume);
- }
- #endif
- break;
- #endif
- #ifdef OGG_MUSIC
- case MUS_OGG:
- OGG_setvolume(music_playing->data.ogg, volume);
- break;
- #endif
- #ifdef FLAC_MUSIC
- case MUS_FLAC:
- FLAC_setvolume(music_playing->data.flac, volume);
- break;
- #endif
- #ifdef MP3_MUSIC
- case MUS_MP3:
- smpeg.SMPEG_setvolume(music_playing->data.mp3,(int)(((float)volume/(float)MIX_MAX_VOLUME)*100.0));
- break;
- #endif
- #ifdef MP3_MAD_MUSIC
- case MUS_MP3_MAD:
- mad_setVolume(music_playing->data.mp3_mad, volume);
- break;
- #endif
- default:
- /* Unknown music type?? */
- break;
- }
- }
- int Mix_VolumeMusic(int volume)
- {
- int prev_volume;
- prev_volume = music_volume;
- if ( volume < 0 ) {
- return prev_volume;
- }
- if ( volume > SDL_MIX_MAXVOLUME ) {
- volume = SDL_MIX_MAXVOLUME;
- }
- music_volume = volume;
- SDL_LockAudio();
- if ( music_playing ) {
- music_internal_volume(music_volume);
- }
- SDL_UnlockAudio();
- return(prev_volume);
- }
- /* Halt playing of music */
- static void music_internal_halt(void)
- {
- switch (music_playing->type) {
- #ifdef CMD_MUSIC
- case MUS_CMD:
- MusicCMD_Stop(music_playing->data.cmd);
- break;
- #endif
- #ifdef WAV_MUSIC
- case MUS_WAV:
- WAVStream_Stop();
- break;
- #endif
- #ifdef MOD_MUSIC
- case MUS_MOD:
- MOD_stop(music_playing->data.module);
- break;
- #endif
- #ifdef MID_MUSIC
- case MUS_MID:
- #ifdef USE_NATIVE_MIDI
- if ( native_midi_ok ) {
- native_midi_stop();
- } MIDI_ELSE
- #endif
- #ifdef USE_TIMIDITY_MIDI
- if ( timidity_ok ) {
- Timidity_Stop();
- }
- #endif
- break;
- #endif
- #ifdef OGG_MUSIC
- case MUS_OGG:
- OGG_stop(music_playing->data.ogg);
- break;
- #endif
- #ifdef FLAC_MUSIC
- case MUS_FLAC:
- FLAC_stop(music_playing->data.flac);
- break;
- #endif
- #ifdef MP3_MUSIC
- case MUS_MP3:
- smpeg.SMPEG_stop(music_playing->data.mp3);
- break;
- #endif
- #ifdef MP3_MAD_MUSIC
- case MUS_MP3_MAD:
- mad_stop(music_playing->data.mp3_mad);
- break;
- #endif
- default:
- /* Unknown music type?? */
- return;
- }
- music_playing->fading = MIX_NO_FADING;
- music_playing = NULL;
- }
- int Mix_HaltMusic(void)
- {
- SDL_LockAudio();
- if ( music_playing ) {
- music_internal_halt();
- }
- SDL_UnlockAudio();
- return(0);
- }
- /* Progressively stop the music */
- int Mix_FadeOutMusic(int ms)
- {
- int retval = 0;
- if (ms <= 0) { /* just halt immediately. */
- Mix_HaltMusic();
- return 1;
- }
- SDL_LockAudio();
- if ( music_playing) {
- int fade_steps = (ms + ms_per_step - 1)/ms_per_step;
- if ( music_playing->fading == MIX_NO_FADING ) {
- music_playing->fade_step = 0;
- } else {
- int step;
- int old_fade_steps = music_playing->fade_steps;
- if ( music_playing->fading == MIX_FADING_OUT ) {
- step = music_playing->fade_step;
- } else {
- step = old_fade_steps
- - music_playing->fade_step + 1;
- }
- music_playing->fade_step = (step * fade_steps)
- / old_fade_steps;
- }
- music_playing->fading = MIX_FADING_OUT;
- music_playing->fade_steps = fade_steps;
- retval = 1;
- }
- SDL_UnlockAudio();
- return(retval);
- }
- Mix_Fading Mix_FadingMusic(void)
- {
- Mix_Fading fading = MIX_NO_FADING;
- SDL_LockAudio();
- if ( music_playing ) {
- fading = music_playing->fading;
- }
- SDL_UnlockAudio();
- return(fading);
- }
- /* Pause/Resume the music stream */
- void Mix_PauseMusic(void)
- {
- music_active = 0;
- }
- void Mix_ResumeMusic(void)
- {
- music_active = 1;
- }
- void Mix_RewindMusic(void)
- {
- Mix_SetMusicPosition(0.0);
- }
- int Mix_PausedMusic(void)
- {
- return (music_active == 0);
- }
- /* Check the status of the music */
- static int music_internal_playing()
- {
- int playing = 1;
- switch (music_playing->type) {
- #ifdef CMD_MUSIC
- case MUS_CMD:
- if (!MusicCMD_Active(music_playing->data.cmd)) {
- playing = 0;
- }
- break;
- #endif
- #ifdef WAV_MUSIC
- case MUS_WAV:
- if ( ! WAVStream_Active() ) {
- playing = 0;
- }
- break;
- #endif
- #ifdef MOD_MUSIC
- case MUS_MOD:
- if ( ! MOD_playing(music_playing->data.module) ) {
- playing = 0;
- }
- break;
- #endif
- #ifdef MID_MUSIC
- case MUS_MID:
- #ifdef USE_NATIVE_MIDI
- if ( native_midi_ok ) {
- if ( ! native_midi_active() )
- playing = 0;
- } MIDI_ELSE
- #endif
- #ifdef USE_TIMIDITY_MIDI
- if ( timidity_ok ) {
- if ( ! Timidity_Active() )
- playing = 0;
- }
- #endif
- break;
- #endif
- #ifdef OGG_MUSIC
- case MUS_OGG:
- if ( ! OGG_playing(music_playing->data.ogg) ) {
- playing = 0;
- }
- break;
- #endif
- #ifdef FLAC_MUSIC
- case MUS_FLAC:
- if ( ! FLAC_playing(music_playing->data.flac) ) {
- playing = 0;
- }
- break;
- #endif
- #ifdef MP3_MUSIC
- case MUS_MP3:
- if ( smpeg.SMPEG_status(music_playing->data.mp3) != SMPEG_PLAYING )
- playing = 0;
- break;
- #endif
- #ifdef MP3_MAD_MUSIC
- case MUS_MP3_MAD:
- if (!mad_isPlaying(music_playing->data.mp3_mad)) {
- playing = 0;
- }
- break;
- #endif
- default:
- playing = 0;
- break;
- }
- return(playing);
- }
- int Mix_PlayingMusic(void)
- {
- int playing = 0;
- SDL_LockAudio();
- if ( music_playing ) {
- playing = music_internal_playing();
- }
- SDL_UnlockAudio();
- return(playing);
- }
- /* Set the external music playback command */
- int Mix_SetMusicCMD(const char *command)
- {
- Mix_HaltMusic();
- if ( music_cmd ) {
- free(music_cmd);
- music_cmd = NULL;
- }
- if ( command ) {
- music_cmd = (char *)malloc(strlen(command)+1);
- if ( music_cmd == NULL ) {
- return(-1);
- }
- strcpy(music_cmd, command);
- }
- return(0);
- }
- int Mix_SetSynchroValue(int i)
- {
- /* Not supported by any players at this time */
- return(-1);
- }
- int Mix_GetSynchroValue(void)
- {
- /* Not supported by any players at this time */
- return(-1);
- }
- /* Uninitialize the music players */
- void close_music(void)
- {
- Mix_HaltMusic();
- #ifdef CMD_MUSIC
- Mix_SetMusicCMD(NULL);
- #endif
- #ifdef MOD_MUSIC
- MOD_exit();
- #endif
- #ifdef MID_MUSIC
- # ifdef USE_TIMIDITY_MIDI
- Timidity_Close();
- # endif
- #endif
- /* rcg06042009 report available decoders at runtime. */
- free(music_decoders);
- music_decoders = NULL;
- num_decoders = 0;
- }
- Mix_Music *Mix_LoadMUS_RW(SDL_RWops *rw)
- {
- Uint8 magic[5]; /*Apparently there is no way to check if the file is really a MOD,*/
- /* or there are too many formats supported by MikMod or MikMod does */
- /* this check by itself. If someone implements other formats (e.g. MP3) */
- /* the check can be uncommented */
- Uint8 moremagic[9];
- Mix_Music *music;
- int start;
- if (!rw) {
- Mix_SetError("RWops pointer is NULL");
- return NULL;
- }
- /* Figure out what kind of file this is */
- 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 NULL;
- }
- SDL_RWseek(rw, start, RW_SEEK_SET);
- magic[4]=' ';
- moremagic[8] = ' ';
- /* Allocate memory for the music structure */
- music=(Mix_Music *)malloc(sizeof(Mix_Music));
- if (music==NULL ) {
- Mix_SetError("Out of memory");
- return(NULL);
- }
- music->error = 0;
- #ifdef WAV_MUSIC
- /* 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) ) {
- music->type = MUS_WAV;
- music->data.wave = WAVStream_LoadSong_RW(rw, (char *)magic);
- if ( music->data.wave == NULL ) {
- music->error = 1;
- }
- } else
- #endif
- #ifdef OGG_MUSIC
- /* Ogg Vorbis files have the magic four bytes "OggS" */
- if ( strcmp((char *)magic, "OggS") == 0 ) {
- music->type = MUS_OGG;
- music->data.ogg = OGG_new_RW(rw);
- if ( music->data.ogg == NULL ) {
- music->error = 1;
- }
- } else
- #endif
- #ifdef FLAC_MUSIC
- /* FLAC files have the magic four bytes "fLaC" */
- if ( strcmp((char *)magic, "fLaC") == 0 ) {
- music->type = MUS_FLAC;
- music->data.flac = FLAC_new_RW(rw);
- if ( music->data.flac == NULL ) {
- music->error = 1;
- }
- } else
- #endif
- #ifdef MP3_MUSIC
- if ( ( magic[0] == 0xFF && (magic[1] & 0xF0) == 0xF0) || ( strncmp((char *)magic, "ID3", 3) == 0 ) ) {
- if ( Mix_Init(MIX_INIT_MP3) ) {
- SMPEG_Info info;
- music->type = MUS_MP3;
- music->data.mp3 = smpeg.SMPEG_new_rwops(rw, &info, 0);
- if ( !info.has_audio ) {
- Mix_SetError("MPEG file does not have any audio stream.");
- music->error = 1;
- } else {
- smpeg.SMPEG_actualSpec(music->data.mp3, &used_mixer);
- }
- } else {
- music->error = 1;
- }
- } else
- #endif
- #ifdef MP3_MAD_MUSIC
- if ( ( magic[0] == 0xFF && (magic[1] & 0xF0) == 0xF0) || ( strncmp((char *)magic, "ID3", 3) == 0 ) ) {
- music->type = MUS_MP3_MAD;
- music->data.mp3_mad = mad_openFileRW(rw, &used_mixer);
- if (music->data.mp3_mad == 0) {
- Mix_SetError("Could not initialize MPEG stream.");
- music->error = 1;
- }
- } else
- #endif
- #ifdef MID_MUSIC
- /* MIDI files have the magic four bytes "MThd" */
- if ( strcmp((char *)magic, "MThd") == 0 ) {
- music->type = MUS_MID;
- #ifdef USE_NATIVE_MIDI
- if ( native_midi_ok ) {
- music->data.nativemidi = native_midi_loadsong_RW(rw);
- if ( music->data.nativemidi == NULL ) {
- Mix_SetError("%s", native_midi_error());
- music->error = 1;
- }
- } MIDI_ELSE
- #endif
- #ifdef USE_TIMIDITY_MIDI
- if ( timidity_ok ) {
- music->data.midi = Timidity_LoadSong_RW(rw);
- if ( music->data.midi == NULL ) {
- Mix_SetError("%s", Timidity_Error());
- music->error = 1;
- }
- } else {
- Mix_SetError("%s", Timidity_Error());
- music->error = 1;
- }
- #endif
- } else
- #endif
- #ifdef MOD_MUSIC
- if (1) {
- music->type=MUS_MOD;
- music->data.module = MOD_new_RW(rw);
- if ( music->data.module == NULL ) {
- music->error = 1;
- }
- } else
- #endif
- {
- Mix_SetError("Unrecognized music format");
- music->error=1;
- }
- if (music->error) {
- free(music);
- music=NULL;
- }
- return(music);
- }