using System.Collections.Generic;

namespace MoonWorks.Audio
{
	internal class SourceVoicePool
	{
		private AudioDevice Device;

		Dictionary<Format, Queue<SourceVoice>> VoiceLists = new Dictionary<Format, Queue<SourceVoice>>();

		public SourceVoicePool(AudioDevice device)
		{
			Device = device;
		}

		public SourceVoice Obtain(Format format)
		{
			if (!VoiceLists.ContainsKey(format))
			{
				VoiceLists.Add(format, new Queue<SourceVoice>());
			}

			var list = VoiceLists[format];

			if (list.Count == 0)
			{
				list.Enqueue(new SourceVoice(Device, format));
			}

			return list.Dequeue();
		}

		public void Return(SourceVoice voice)
		{
			var list = VoiceLists[voice.Format];
			list.Enqueue(voice);
		}
	}
}