unsigned int SimpleAudioEngine::playEffect(const char* pszFilePath, bool bLoop,
float pitch, float pan, float gain)
{
std::string key = std::string(pszFilePath);
struct soundData *sound;
if(!s_effects.count(key))
{
sound = new struct soundData();
sound->chunk = Mix_LoadWAV(pszFilePath);
sound->isLooped = bLoop;
s_effects[key] = sound;
}
else
{
sound = s_effects[key];
}
// This is safe here since Emscripten is just passing back an
// incrementing integer each time you use the Mix_LoadWAV method.
unsigned int result = (unsigned int) sound->chunk;
// XXX: This is a bit of a hack, but... Choose a channel based on the
// modulo of the # of channels. This allows us to set the volume
// without passing around both chunk address and channel.
Mix_PlayChannel(result % NR_CHANNELS, sound->chunk, bLoop ? -1 : 0);
return result;
}
void SimpleAudioEngine::unloadEffect(const char* pszFilePath)
{
std::string key = std::string(pszFilePath);
if(!s_effects.count(key))
{
return;
}
struct soundData *sound = s_effects[key];
Mix_FreeChunk(sound->chunk);
delete sound;
s_effects.erase(key);
}
