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#include "constants.h"
#include "sound.h"
Mix_Chunk *SoundHandler :: sounds[NR_SOUNDS];
Mix_Music *SoundHandler :: music;
int SoundHandler :: soundChannels[NR_SOUNDS];
bool SoundHandler :: soundOn;
bool SoundHandler :: musicOn;
bool SoundHandler :: init( )
{
// We're going to be requesting certain things from our audio
// device, so we set them up beforehand
int audio_rate = 22050;
Uint16 audio_format = AUDIO_S16; //AUDIO_S16; /* 16-bit stereo */
int audio_channels = 2;
int audio_buffers = 1024;//4096;
// This is where we open up our audio device. Mix_OpenAudio takes
// as its parameters the audio format we'd /like/ to have.
if(Mix_OpenAudio(audio_rate, audio_format, audio_channels, audio_buffers))
{
printf("Unable to open audio!\n");
return false;
}
// We're going to pre-load the sound effects that we need right here
sounds[SND_EXPLOSION] = Mix_LoadWAV( SOUND_PATH "explosion.wav");
sounds[SND_THRUST] = Mix_LoadWAV( SOUND_PATH "thrust.wav");
music = 0;
soundOn = true;
musicOn = true;
return true;
}
void SoundHandler :: cleanUp()
{
// Free audio sounds
if ( sounds[SND_EXPLOSION] )
Mix_FreeChunk( sounds[SND_EXPLOSION] );
if ( sounds[SND_THRUST] )
Mix_FreeChunk( sounds[SND_THRUST] );
if ( music )
Mix_FreeMusic( music );
Mix_CloseAudio();
}
int SoundHandler :: playSound( int soundNr, int channel, int nrLoops, int playBeforeFinished )
{
if ( !soundOn )
return -1;
if ( soundNr >= NR_SOUNDS || !sounds[soundNr] )
return -1;
Mix_Chunk *chunk = sounds[soundNr];
if( channel == -1 || !Mix_Playing( channel ) )
channel = Mix_PlayChannel(-1, sounds[soundNr], nrLoops);
Mix_Volume( channel, MIX_MAX_VOLUME );
return channel;
}
void SoundHandler :: stopSound( int channel, bool fadeOut, int nrMilliSecs )
{
if ( !soundOn )
return;
if ( !fadeOut )
Mix_HaltChannel( channel );
else
{
Mix_FadeOutChannel( channel, nrMilliSecs );
}
}
void SoundHandler :: playMusic( string musicFile )
{
if ( !soundOn )
return;
// If music already exists - stop it playing if necessary and free it up
if ( music )
{
stopMusic();
Mix_FreeMusic( music );
}
// Load music
music = Mix_LoadMUS( musicFile.c_str() );
if(!music)
{
printf("Mix_LoadMUS(%s): %s\n", musicFile.c_str(), Mix_GetError());
// this might be a critical error...
}
playMusic();
}
void SoundHandler :: playMusic( bool fade )
{
if ( !musicOn )
return;
if ( music )
{
Mix_VolumeMusic( MIX_MAX_VOLUME );
Mix_RewindMusic();
if ( fade )
Mix_FadeInMusic( music, -1, 1000 );
else
Mix_PlayMusic( music, -1 );
}
}
void SoundHandler :: stopMusic( bool fadeOut )
{
if ( !music || !Mix_PlayingMusic() )
return;
if ( fadeOut && Mix_FadingMusic() == MIX_NO_FADING )
{
Mix_FadeOutMusic( 1000 );
}
else
{
Mix_HaltMusic();
}
}
void SoundHandler :: setMusicVolume( int vol )
{
Mix_VolumeMusic( vol );
}
void SoundHandler :: setSoundsOn( bool val )
{
soundOn = val;
}
void SoundHandler :: setMusicOn( bool val )
{
musicOn = val;
if ( !musicOn )
stopMusic();
else
playMusic( true );
}
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