PlayService.cs

// 
// Author: John Carruthers (johnc@frag-labs.com)
// 
// Copyright (C) 2013 John Carruthers
// 
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//  
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//  
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// 

using System;
using System.Linq;
using System.Net;
using FragLabs.AdjutantOS.API;
using FragLabs.AdjutantOS.API.Devices;
using FragLabs.AdjutantOS.API.Services;
using FragLabs.AdjutantOS.API.Assets;

namespace FragLabs.AdjutantOS.Modules.RainyMood.Services
{
	public class PlayService : ServiceBase<Play>
	{
		public override object Execute (Play request)
		{
			var computer = DeviceRepository.GetSingle<Computer>(request.ComputerDeviceId);
			if (computer == null)
				throw new Exception("Computer isn't known");
			if (!computer.IsOnline)
				throw new Exception("Computer is not online");
			if (RainyMoodApp.Instance.PlayingComputers.Any(c => c.DeviceId.Equals(request.ComputerDeviceId)))
				throw new Exception("Computer is already playing rainy mood");

			var waveStream = new Wave.WaveStream(RainyMoodApp.Instance.WaveStream);
			var assetServer = new TcpStreamServer(IPAddress.Any, waveStream, false);
			assetServer.Closed += (sender, args) => RainyMoodApp.Instance.RemoveFromPlayingList(computer);
			//  note: any exceptions that occur on the client computer will propogate back to the PlayService caller
			ServiceInvoker.CallSync<PlayAudioResponse>(computer, new PlayAudioRequest{
				OutputDevice = request.OutputDeviceID,
				Channels = waveStream.Channels,
				BitDepth = waveStream.BitDepth,
				SampleRate = waveStream.SampleRate,
				StreamSourceUrl = assetServer.Url,
				Decoder = AudioDecoder.Raw
			});
			RainyMoodApp.Instance.AddToPlayingList(computer);

			return new PlayResponse();
		}
	}
}