public byte[] Compress(AudioChunk input)
{
int frameSize = GetFrameSize();
if (input != null)
{
short[] newData = input.Data;
_incomingSamples.Write(newData);
}
else
{
// If input is null, assume we are at end of stream and pad the output with zeroes
int paddingNeeded = _incomingSamples.Available() % frameSize;
if (paddingNeeded > 0)
{
_incomingSamples.Write(new short[paddingNeeded]);
}
}
int outCursor = 0;
if (_incomingSamples.Available() >= frameSize)
{
unsafe
{
fixed(byte *benc = scratchBuffer)
{
short[] nextFrameData = _incomingSamples.Read(frameSize);
byte[] nextFrameBytes = AudioMath.ShortsToBytes(nextFrameData);
IntPtr encodedPtr = new IntPtr(benc);
_timer.Reset();
_timer.Start();
int thisPacketSize = opus_encode(_encoder, nextFrameBytes, frameSize, encodedPtr, scratchBuffer.Length);
outCursor += thisPacketSize;
_timer.Stop();
}
}
}
if (outCursor > 0)
{
_statistics.EncodeSpeed = _frameSize / ((double)_timer.ElapsedTicks / Stopwatch.Frequency * 1000);
}
byte[] finalOutput = new byte[outCursor];
Array.Copy(scratchBuffer, 0, finalOutput, 0, outCursor);
return(finalOutput);
}
/// <summary>
/// Creates a new audio sample from a .WAV file name
/// </summary>
/// <param name="fileName"></param>
//public AudioChunk(string fileName)
// : this(new FileStream(fileName, FileMode.Open))
//{
//}
public byte[] GetDataAsBytes()
{
return(AudioMath.ShortsToBytes(Data));
}
/// <summary>
/// Creates a new audio sample from a 2-byte little endian array
/// </summary>
/// <param name="rawData"></param>
/// <param name="sampleRate"></param>
public AudioChunk(byte[] rawData, int sampleRate)
: this(AudioMath.BytesToShorts(rawData), sampleRate)
{
}