Function Sound_GetFreeSlot

TombEngine/Sound/sound.cpp:747–773

Get first free (non-playing) sound slot. If no free slots found, now try to hijack slot which is as far from listener as possible

// Get first free (non-playing) sound slot.
// If no free slots found, now try to hijack slot which is as far from listener as possible
int Sound_GetFreeSlot()
{
	for (int i = 0; i < SOUND_MAX_CHANNELS; i++)
	{
		if (SoundSlot[i].Channel == NULL || !BASS_ChannelIsActive(SoundSlot[i].Channel))
			return i;
	}

	// No free slots, hijack now.

	float minDistance = 0;
	int farSlot = SOUND_NO_CHANNEL;

	for (int i = 0; i < SOUND_MAX_CHANNELS; i++)
	{
		float distance = Vector3(SoundSlot[i].Origin - Vector3(Camera.mikePos.x, Camera.mikePos.y, Camera.mikePos.z)).Length();
		if (distance > minDistance)
		{
			minDistance = distance;
			farSlot = i;
		}
	}

	TENLog("Hijacking sound effect slot " + std::to_string(farSlot), LogLevel::Info);
	Sound_FreeSlot(farSlot, SOUND_XFADETIME_HIJACKSOUND);
	return farSlot;
}

int Sound_TrackIsPlaying(const std::string& fileName, std::optional<SoundTrackType> type)
{