void MainManager::initSDLmixer()
{
log_.i("Initializing SDL_mixer");
int mixFlags = MIX_INIT_FLAC;
int mixFlagsInit = Mix_Init(mixFlags);
if ((mixFlagsInit & mixFlags) != mixFlags)
throw log_.exception("Failed to initialize SDL_mixer", Mix_GetError);
if( Mix_OpenAudio( 22050, MIX_DEFAULT_FORMAT, 2, 1024 ) == -1 )
throw log_.exception("Failed to aquire sound device", Mix_GetError);
atexit(Mix_CloseAudio);
atexit(Mix_Quit);
// Write version information to log
SDL_version compiled;
SDL_MIXER_VERSION(&compiled);
logSDLVersion("SDL_mixer", compiled, *Mix_Linked_Version());
// Write music decoder information to log
const int nMusicDecoders = Mix_GetNumMusicDecoders();
std::stringstream ss;
if (nMusicDecoders > 0)
ss << Mix_GetMusicDecoder(0);
for (int i = 1 ; i < nMusicDecoders ; ++i) {
ss << ", " << Mix_GetMusicDecoder(i) << Log::end;
}
log_.d() << "Music decoders (" << nMusicDecoders << "): "
<< ss.str() << Log::end;
// Write audio decoder information to log
const int nChunkDecoders = Mix_GetNumChunkDecoders();
ss.str(std::string(""));
if (nChunkDecoders > 0)
ss << Mix_GetChunkDecoder(0);
for (int i = 1 ; i < nChunkDecoders ; ++i) {
ss << ", " << Mix_GetChunkDecoder(i) << Log::end;
}
log_.d() << "Audio decoders (" << nChunkDecoders << "): "
<< ss.str() << Log::end;
(void)Mix_VolumeMusic(MIX_MAX_VOLUME);
(void)Mix_Volume(-1, MIX_MAX_VOLUME);
// (void)Mix_VolumeMusic(MIX_MAX_VOLUME);
log_.d() << "Music Volume level: "
<< 100.0f * (float)Mix_VolumeMusic(-1) / MIX_MAX_VOLUME << "%"
<< Log::end;
// TODO swarminglogic, 2014-02-08: Move to audio configuration setting.
// Setting 64 channels to be played simulatenously
Mix_AllocateChannels(64);
}
static void report_decoders(void)
{
int i, total;
printf("Supported decoders...\n");
total = Mix_GetNumChunkDecoders();
for (i = 0; i < total; i++) {
fprintf(stderr, " - chunk decoder: %s\n", Mix_GetChunkDecoder(i));
}
total = Mix_GetNumMusicDecoders();
for (i = 0; i < total; i++) {
fprintf(stderr, " - music decoder: %s\n", Mix_GetMusicDecoder(i));
}
}
void logSDLMixerMediaInfo(std::ostream& out)
{
// Write music decoder information
const int nMusicDecoders = Mix_GetNumMusicDecoders();
out << "Music decoders (" << nMusicDecoders << "): ";
if (nMusicDecoders > 0)
out << Mix_GetMusicDecoder(0);
for (int i = 1 ; i < nMusicDecoders ; ++i)
out << ", " << Mix_GetMusicDecoder(i);
out << std::endl;
// Write audio decoder information
const int nChunkDecoders = Mix_GetNumChunkDecoders();
out << "Audio decoders (" << nChunkDecoders << "): ";
if (nChunkDecoders > 0)
out << Mix_GetChunkDecoder(0);
for (int i = 1 ; i < nChunkDecoders ; ++i) {
out << ", " << Mix_GetChunkDecoder(i);
}
out << std::endl;
}
int main(int argc, char **argv)
{
int audio_rate,audio_channels;
Uint16 audio_format;
Uint32 t;
Mix_Music *music;
int volume=SDL_MIX_MAXVOLUME;
/* initialize SDL for audio and video */
if(SDL_Init(SDL_INIT_AUDIO|SDL_INIT_VIDEO)<0)
cleanExit("SDL_Init");
atexit(SDL_Quit);
int initted=Mix_Init(0);
printf("Before Mix_Init SDL_mixer supported: ");
print_init_flags(initted);
initted=Mix_Init(~0);
printf("After Mix_Init SDL_mixer supported: ");
print_init_flags(initted);
Mix_Quit();
if(argc<2 || argc>4)
{
fprintf(stderr,"Usage: %s filename [depth] [any 3rd argument...]\n"
" filename is any music file supported by your SDL_mixer library\n"
" depth is screen depth, default is 8bits\n"
" if there is a third argument given, we go fullscreen for maximum fun!\n",
*argv);
return 1;
}
/* open a screen for the wav output */
if(!(s=SDL_SetVideoMode(W,H,(argc>2?atoi(argv[2]):8),(argc>3?SDL_FULLSCREEN:0)|SDL_HWSURFACE|SDL_DOUBLEBUF)))
cleanExit("SDL_SetVideoMode");
SDL_WM_SetCaption("sdlwav - SDL_mixer demo","sdlwav");
/* hide the annoying mouse pointer */
SDL_ShowCursor(SDL_DISABLE);
/* get the colors we use */
white=SDL_MapRGB(s->format,0xff,0xff,0xff);
black=SDL_MapRGB(s->format,0,0,0);
/* initialize sdl mixer, open up the audio device */
if(Mix_OpenAudio(44100,MIX_DEFAULT_FORMAT,2,BUFFER)<0)
cleanExit("Mix_OpenAudio");
/* we play no samples, so deallocate the default 8 channels... */
Mix_AllocateChannels(0);
/* print out some info on the formats this run of SDL_mixer supports */
{
int i,n=Mix_GetNumChunkDecoders();
printf("There are %d available chunk(sample) decoders:\n",n);
for(i=0; i<n; ++i)
printf(" %s\n", Mix_GetChunkDecoder(i));
n = Mix_GetNumMusicDecoders();
printf("There are %d available music decoders:\n",n);
for(i=0; i<n; ++i)
printf(" %s\n", Mix_GetMusicDecoder(i));
}
/* print out some info on the audio device and stream */
Mix_QuerySpec(&audio_rate, &audio_format, &audio_channels);
bits=audio_format&0xFF;
sample_size=bits/8+audio_channels;
rate=audio_rate;
printf("Opened audio at %d Hz %d bit %s, %d bytes audio buffer\n", audio_rate,
bits, audio_channels>1?"stereo":"mono", BUFFER );
/* calculate some parameters for the wav display */
dy=s->h/2.0/(float)(0x1<<bits);
/* load the song */
if(!(music=Mix_LoadMUS(argv[1])))
cleanExit("Mix_LoadMUS(\"%s\")",argv[1]);
{
Mix_MusicType type=Mix_GetMusicType(music);
printf("Music type: %s\n",
type==MUS_NONE?"MUS_NONE":
type==MUS_CMD?"MUS_CMD":
type==MUS_WAV?"MUS_WAV":
/*type==MUS_MOD_MODPLUG?"MUS_MOD_MODPLUG":*/
type==MUS_MOD?"MUS_MOD":
type==MUS_MID?"MUS_MID":
type==MUS_OGG?"MUS_OGG":
type==MUS_MP3?"MUS_MP3":
type==MUS_MP3_MAD?"MUS_MP3_MAD":
type==MUS_FLAC?"MUS_FLAC":
"Unknown");
}
/* set the post mix processor up */
Mix_SetPostMix(postmix,argv[1]);
SDL_FillRect(s,NULL,black);
SDL_Flip(s);
SDL_FillRect(s,NULL,black);
SDL_Flip(s);
/* start playing and displaying the wav */
/* wait for escape key of the quit event to finish */
t=SDL_GetTicks();
if(Mix_PlayMusic(music, 1)==-1)
cleanExit("Mix_PlayMusic(0x%p,1)",music);
Mix_VolumeMusic(volume);
while((Mix_PlayingMusic() || Mix_PausedMusic()) && !done)
{
SDL_Event e;
while(SDL_PollEvent(&e))
{
switch(e.type)
{
case SDL_KEYDOWN:
switch(e.key.keysym.sym)
{
case SDLK_ESCAPE:
done=1;
break;
case SDLK_LEFT:
if(e.key.keysym.mod&KMOD_SHIFT)
{
Mix_RewindMusic();
position=0;
}
else
{
int pos=position/audio_rate-1;
if(pos<0)
pos=0;
Mix_SetMusicPosition(pos);
position=pos*audio_rate;
}
break;
case SDLK_RIGHT:
switch(Mix_GetMusicType(NULL))
{
case MUS_MP3:
Mix_SetMusicPosition(+5);
position+=5*audio_rate;
break;
case MUS_OGG:
case MUS_FLAC:
case MUS_MP3_MAD:
/*case MUS_MOD_MODPLUG:*/
Mix_SetMusicPosition(position/audio_rate+1);
position+=audio_rate;
break;
default:
printf("cannot fast-forward this type of music\n");
break;
}
break;
case SDLK_UP:
volume=(volume+1)<<1;
if(volume>SDL_MIX_MAXVOLUME)
volume=SDL_MIX_MAXVOLUME;
Mix_VolumeMusic(volume);
break;
case SDLK_DOWN:
volume>>=1;
Mix_VolumeMusic(volume);
break;
case SDLK_SPACE:
if(Mix_PausedMusic())
Mix_ResumeMusic();
else
Mix_PauseMusic();
break;
default:
break;
}
break;
case SDL_QUIT:
done=1;
break;
default:
break;
}
}
/* the postmix processor tells us when there's new data to draw */
if(need_refresh)
refresh();
SDL_Delay(0);
}
t=SDL_GetTicks()-t;
/* free & close */
Mix_FreeMusic(music);
Mix_CloseAudio();
SDL_Quit();
/* show a silly statistic */
printf("fps=%.2f\n",((float)flips)/(t/1000.0));
return(0);
}
static mrb_value
mrb_sdl2_mixer_GetNumChunkDecoders(mrb_state *mrb, mrb_value self)
{
return mrb_fixnum_value(Mix_GetNumChunkDecoders());
}