/// <summary>
/// Reads bytes from this wave stream
/// </summary>
/// <param name="destBuffer">The destination buffer</param>
/// <param name="offset">Offset into the destination buffer</param>
/// <param name="numBytes">Number of bytes read</param>
/// <returns>Number of bytes read.</returns>
public override int Read(byte[] destBuffer, int offset, int numBytes)
{
lock (lockObject)
{
int bytesWritten = 0;
WaveBuffer destWaveBuffer = new WaveBuffer(destBuffer);
// 1. fill with silence
if (position < 0)
{
bytesWritten = (int)Math.Min(numBytes, 0 - position);
for (int n = 0; n < bytesWritten; n++)
{
destBuffer[n + offset] = 0;
}
}
if (bytesWritten < numBytes)
{
sampleProvider.LoadNextChunk(sourceStream, (numBytes - bytesWritten) / 8);
float left, right;
int outIndex = (offset / 4) + bytesWritten / 4;
while (this.sampleProvider.GetNextSample(out left, out right) && bytesWritten < numBytes)
{
// implement better panning laws.
left = (pan <= 0) ? left : (left * (1 - pan) / 2.0f);
right = (pan >= 0) ? right : (right * (pan + 1) / 2.0f);
left *= volume;
right *= volume;
destWaveBuffer.FloatBuffer[outIndex++] = left;
destWaveBuffer.FloatBuffer[outIndex++] = right;
bytesWritten += 8;
if (Sample != null)
{
RaiseSample(left, right);
}
}
}
// 3. Fill out with zeroes
if (PadWithZeroes && bytesWritten < numBytes)
{
Array.Clear(destBuffer, offset + bytesWritten, numBytes - bytesWritten);
bytesWritten = numBytes;
}
position += bytesWritten;
return(bytesWritten);
}
}
