Opentk/Source/Examples/OpenAL/StreamingPlayback.cs
2008-04-04 21:33:34 +00:00

113 lines
3.4 KiB
C#

#region --- License ---
/* Licensed under the MIT/X11 license.
* Copyright (c) 2006-2008 the OpenTK Team.
* This notice may not be removed from any source distribution.
* See license.txt for licensing details.
*/
#endregion
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using OpenTK.Audio;
namespace Examples.OpenAL
{
[Example("Streaming Playback", ExampleCategory.OpenAL)]
public class StreamingPlayback
{
const string filename = "Data\\Audio\\the_ring_that_fell.wav";
const int buffer_size = 8096;
static object openal_lock = new object();
public static void Main()
{
AudioContext context = new AudioContext();
using (SoundReader sound = new SoundReader(filename))
{
int[] buffers = AL.GenBuffers(2);
int source = AL.GenSource();
int state;
Console.WriteLine("Testing WaveReader({0}).ReadSamples()", filename);
Console.Write("Playing");
SoundStreamer streamer = new SoundStreamer(sound, source, buffers);
streamer.Start();
// Query the source to find out when it stops playing.
do
{
Thread.Sleep(100);
Console.Write(".");
lock (openal_lock)
{
AL.GetSource(source, ALGetSourcei.SourceState, out state);
}
}
while ((ALSourceState)state == ALSourceState.Playing);
Console.WriteLine();
AL.SourceStop(source);
AL.DeleteSource(source);
AL.DeleteBuffers(buffers);
sound.Dispose();
}
}
class SoundStreamer
{
SoundReader reader;
int source;
int[] buffers;
public SoundStreamer(SoundReader sound, int source, int[] buffers)
{
reader = sound;
this.source = source;
this.buffers = buffers;
lock (openal_lock)
{
foreach (int buffer in buffers)
AL.BufferData(buffer, sound.ReadSamples(buffer_size));
AL.SourceQueueBuffers(source, buffers.Length, buffers);
}
}
public void Start()
{
new Thread(new ThreadStart(StartStreaming)).Start();
}
void StartStreaming()
{
while (!reader.EndOfFile)
{
lock (openal_lock)
{
int processed_count;
AL.GetSource(source, ALGetSourcei.BuffersProcessed, out processed_count);
while (processed_count-- > 0)
{
int buffer = AL.SourceUnqueueBuffer(source);
AL.BufferData(buffer, reader.ReadSamples(buffer_size));
AL.SourceQueueBuffer(source, buffer);
}
}
Thread.Sleep(5);
}
}
}
}
}