/// <summary>
/// Reads from this provider
/// </summary>
public int Read(byte[] buffer, int offset, int count)
{
int samplesNeeded = count / 4;
WaveBuffer wb = new WaveBuffer(buffer);
int samplesRead = source.Read(wb.FloatBuffer, offset / 4, samplesNeeded);
return samplesRead * 4;
}
/// <summary>
/// Implements the Read method of IWaveProvider by delegating to the abstract
/// Read method taking a short array
/// </summary>
public int Read(byte[] buffer, int offset, int count)
{
WaveBuffer waveBuffer = new WaveBuffer(buffer);
int samplesRequired = count / 2;
int samplesRead = Read(waveBuffer.ShortBuffer, offset / 2, samplesRequired);
return samplesRead * 2;
}
/// <summary>
/// Implements the Read method of IWaveProvider by delegating to the abstract
/// Read method taking a float array
/// </summary>
public int Read(byte[] buffer, int offset, int count)
{
WaveBuffer waveBuffer = new WaveBuffer(buffer);
int samplesRequired = count / 4;
int samplesRead = Read(waveBuffer.FloatBuffer, offset / 4, samplesRequired);
return samplesRead * 4;
}
public void LoadNextChunk(IWaveProvider source, int samplePairsRequired)
{
int sourceBytesRequired = samplePairsRequired * 2;
sourceSample = 0;
sourceBuffer = BufferHelpers.Ensure(sourceBuffer, sourceBytesRequired);
sourceWaveBuffer = new WaveBuffer(sourceBuffer);
sourceSamples = source.Read(sourceBuffer, 0, sourceBytesRequired) / 2;
}
/// <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 int Read(byte[] destBuffer, int offset, int numBytes)
{
int sourceBytesRequired = numBytes / 2;
sourceBuffer = BufferHelpers.Ensure(sourceBuffer, sourceBytesRequired);
int sourceBytesRead = sourceProvider.Read(sourceBuffer, offset, sourceBytesRequired);
WaveBuffer sourceWaveBuffer = new WaveBuffer(sourceBuffer);
WaveBuffer destWaveBuffer = new WaveBuffer(destBuffer);
int sourceSamples = sourceBytesRead / 2;
int destOffset = offset / 4;
for (int sample = 0; sample < sourceSamples; sample++)
{
destWaveBuffer.FloatBuffer[destOffset++] = (sourceWaveBuffer.ShortBuffer[sample] / 32768f) * volume;
}
return sourceSamples * 4;
}
/// <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)
{
this.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;
}
}
/// <summary>
/// Reads bytes from this WaveProvider
/// </summary>
public int Read(byte[] buffer, int offset, int count)
{
int sourceBytesRequired = count / 2;
this.sourceBuffer = BufferHelpers.Ensure(this.sourceBuffer, sourceBytesRequired);
WaveBuffer sourceWaveBuffer = new WaveBuffer(sourceBuffer);
WaveBuffer destWaveBuffer = new WaveBuffer(buffer);
int sourceBytesRead = sourceProvider.Read(sourceBuffer, 0, sourceBytesRequired);
int samplesRead = sourceBytesRead / 2;
int destOffset = offset / 2;
for (int sample = 0; sample < samplesRead; sample++)
{
short sampleVal = sourceWaveBuffer.ShortBuffer[sample];
destWaveBuffer.ShortBuffer[destOffset++] = (short)(LeftVolume * sampleVal);
destWaveBuffer.ShortBuffer[destOffset++] = (short)(RightVolume * sampleVal);
}
return samplesRead * 4;
}
