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using System;
#if IPHONE
using OpenTK.Audio.OpenAL;
#elif MONOMAC
using MonoMac.OpenAL;
#endif
namespace Microsoft.Xna.Framework.Audio
{
internal class OALSoundBuffer : IDisposable
{
int openALDataBuffer;
internal byte[] pcmDataBuffer;
ALFormat openALFormat;
int dataSize;
int sampleRate;
private int _sourceId;
public OALSoundBuffer ()
{
ALError alError;
alError = AL.GetError ();
AL.GenBuffers (1, out openALDataBuffer);
alError = AL.GetError ();
if (alError != ALError.NoError) {
#if DEBUG
Console.WriteLine ("Failed to generate OpenAL data buffer: ", AL.GetErrorString (alError));
#endif
}
}
public int OpenALDataBuffer {
get {
return openALDataBuffer;
}
}
public double Duration {
get;
set;
}
public void BindDataBuffer (byte[] dataBuffer, ALFormat format, int size, int sampleRate)
{
pcmDataBuffer = dataBuffer;
openALFormat = format;
dataSize = size;
this.sampleRate = sampleRate;
AL.BufferData (openALDataBuffer, openALFormat, pcmDataBuffer, dataSize, this.sampleRate);
int bits, channels;
AL.GetBuffer (openALDataBuffer, ALGetBufferi.Bits, out bits);
AL.GetBuffer (openALDataBuffer, ALGetBufferi.Channels, out channels);
ALError alError = AL.GetError ();
if (alError != ALError.NoError) {
#if DEBUG
Console.WriteLine ("Failed to get buffer attributes: ", AL.GetErrorString (alError));
#endif
Duration = -1;
} else {
Duration = (float)(size / ((bits / 8) * channels)) / (float)sampleRate;
}
//Console.WriteLine("Duration: " + Duration + " / size: " + size + " bits: " + bits + " channels: " + channels + " rate: " + sampleRate);
}
public void Dispose ()
{
CleanUpBuffer ();
}
public void CleanUpBuffer ()
{
if (AL.IsBuffer (openALDataBuffer)) {
AL.DeleteBuffers (1, ref openALDataBuffer);
}
pcmDataBuffer = null;
}
public int SourceId
{
get {
return _sourceId;
}
set {
_sourceId = value;
if (Reserved != null)
Reserved(this, EventArgs.Empty);
}
}
public void RecycleSoundBuffer()
{
if (Recycled != null)
Recycled(this, EventArgs.Empty);
}
#region Events
public event EventHandler<EventArgs> Reserved;
public event EventHandler<EventArgs> Recycled;
#endregion
}
}
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