private byte[] DecodeFormat2(byte[] data)
{
short[] output = new short[data.Length * 2];
decode2.Decode(decode2State, output, data, data.Length);
float[] f = Converters.shorts2floats(output, true);
float[] s = Converters.mono2stereo(f);
byte[] o = codecUpSampler.inputResample(Converters.floats2bytes(s), s.Length);
return(o);
}
/**
* FORMAT 2
* G722 16kHz mono
**/
private byte[] EncodeFormat2(float[] data)
{
byte[] rs = codecDownSampler.inputResample(Converters.floats2bytes(data), data.Length);
float[] f = Converters.bytes2floats(rs);
float[] mono = Converters.stereo2mono(f);
short[] shorts = Converters.floats2shorts(mono, true);
int bytes = (int)(shorts.Length / 2);
byte[] output = new byte[bytes];
encode2.Encode(encode2State, output, shorts, shorts.Length);
return(output);
}
private byte[] DecodeFormat1(byte[] data)
{
// SPLIT INTO TWO PARTS
byte[] L = new byte[data.Length / 2];
byte[] R = new byte[data.Length / 2];
Array.Copy(data, L, L.Length);
Array.Copy(data, L.Length, R, 0, R.Length);
short[] outputL = new short[L.Length * 2];
short[] outputR = new short[R.Length * 2];
decode1L.Decode(decode1Lstate, outputL, L, L.Length);
decode1R.Decode(decode1Rstate, outputR, R, R.Length);
short[] output = Converters.MuxDualMono(outputL, outputR);
return(Converters.floats2bytes(Converters.shorts2floats(output, true)));
}
private byte[] DecodeOpus(byte[] data, int packetSize)
{
// Decoding loop
int frames = data.Length / packetSize;
int frameSize = 960; // must be same as framesize used in input, you can use OpusPacketInfo.GetNumSamples() to determine this dynamically
short[] outputBuffer;
List <float> outData = new List <float>();
for (int i = 0; i < frames; i++)
{
outputBuffer = new short[frameSize * 2];
int thisFrameSize = opus_decoder.Decode(data, i * packetSize, packetSize, outputBuffer, 0, frameSize, false);
outData.AddRange(Converters.shorts2floats(outputBuffer, true));
}
return(Converters.floats2bytes(outData.ToArray()));
}
private void FetchAudioFromInputBuffer()
{
if (inputBuffer != null)
{
double samplesToFetch = (inputBuffer.BufferedDuration.TotalMilliseconds - 50d) * ((internalFormatStereo.SampleRate * internalFormatStereo.Channels) / 1000d);
// CHECK FOR WHOLE NUMBER
if (samplesToFetch - (int)samplesToFetch != 0)
{
throw new ApplicationException("FetchAudioFromInputBuffer cannot fetch fractional samples. Adjust either internal sample rate or main server interval.");
}
// ONLY FETCH AUDIO IF BUFFER CONAINS ENOUGH
if (inputBuffer.BufferedBytes > samplesToFetch && inputBuffer.BufferedDuration.TotalMilliseconds > 100)
{
float[] input = new float[(int)samplesToFetch];
inputResampler.Read(input, 0, (int)samplesToFetch);
initialAudioProccessing(Converters.floats2bytes(input));
}
}
}
/**
* FORMAT 0
* PCM 32bit float 48kHz
**/
private byte[] EncodeFormat0(float[] data)
{
return(Converters.floats2bytes(data));
}