Function StartSound

src/sound.cpp:98–121

Low level sound player */

/* Low level sound player */
static void StartSound(SoundID sound_id, float pan, uint volume)
{
	if (volume == 0) return;

	SoundEntry *sound = GetSound(sound_id);
	if (sound == nullptr) return;

	if (sound->rate == 0) {
		/* If the sound's sample rate is not set then the sound needs to be loaded, but if the sound's file pointer
		 * is empty then an attempt was already made to load the sound but it failed. We don't want to try again. */
		if (sound->file == nullptr) return;
	}

	MixerChannel *mc = MxAllocateChannel();
	if (mc == nullptr) return;

	if (!SetBankSource(mc, sound, sound_id)) return;

	/* Apply the sound effect's own volume. */
	volume = sound->volume * volume;

	MxSetChannelVolume(mc, volume, pan);
	MxActivateChannel(mc);
}


static const uint8_t _vol_factor_by_zoom[] = {255, 255, 255, 190, 134, 87};