/// <summary>
/// Initializes a new instance of the <see cref="CircularSampleBuffer"/> class.
/// </summary>
/// <param name="size">The size.</param>
public CircularSampleBuffer(int size)
{
_buffer = new SampleArray(size);
_writePosition = 0;
_readPosition = 0;
Count = 0;
}
/// <summary>
/// Clears all samples written to this buffer.
/// </summary>
public void Clear()
{
_readPosition = 0;
_writePosition = 0;
Count = 0;
_buffer = new SampleArray(_buffer.Length);
}
public int Read(SampleArray data, int offset, int count)
{
if (count > Count)
{
count = Count;
}
var samplesRead = 0;
var readToEnd = Math.Min(_buffer.Length - _readPosition, count);
SampleArray.Blit(_buffer, _readPosition, data, offset, readToEnd);
samplesRead += readToEnd;
_readPosition += readToEnd;
_readPosition %= _buffer.Length;
if (samplesRead < count)
{
SampleArray.Blit(_buffer, _readPosition, data, offset + samplesRead, count - samplesRead);
_readPosition += (count - samplesRead);
samplesRead = count;
}
Count -= samplesRead;
return(samplesRead);
}
/// <summary>
/// Writes the given samples to this buffer.
/// </summary>
/// <param name="data">The sample array to read from. </param>
/// <param name="offset"></param>
/// <param name="count"></param>
/// <returns></returns>
public int Write(SampleArray data, int offset, int count)
{
var samplesWritten = 0;
if (count > _buffer.Length - Count)
{
count = _buffer.Length - Count;
}
var writeToEnd = Math.Min(_buffer.Length - _writePosition, count);
SampleArray.Blit(data, offset, _buffer, _writePosition, writeToEnd);
_writePosition += writeToEnd;
_writePosition %= _buffer.Length;
samplesWritten += writeToEnd;
if (samplesWritten < count)
{
SampleArray.Blit(data, offset + samplesWritten, _buffer, _writePosition, count - samplesWritten);
_writePosition += (count - samplesWritten);
samplesWritten = count;
}
Count += samplesWritten;
return(samplesWritten);
}
public static void Blit(SampleArray src, int srcPos, SampleArray dest, int destPos, int len)
{
dest.ToFloat32Array().Set(src.ToFloat32Array().SubArray(srcPos, srcPos + len), destPos);
}
