/// <summary>
/// Sends a sample from a signal generator generated waveform.
/// </summary>
private void SendSignalGeneratorSample(object state)
{
lock (_audioStreamTimer)
{
int inputBufferSize = RTP_TIMESTAMP_RATE / 1000 * AUDIO_SAMPLE_PERIOD_MILLISECONDS;
int outputBufferSize = RTP_TIMESTAMP_RATE / 1000 * AUDIO_SAMPLE_PERIOD_MILLISECONDS;
// Get the signal generator to generate the samples and then convert from
// signed linear to PCM.
float[] linear = new float[inputBufferSize];
_signalGenerator.Read(linear, 0, inputBufferSize);
short[] pcm = linear.Select(x => (short)(x * 32767f)).ToArray();
byte[] encodedSample = new byte[outputBufferSize];
for (int index = 0; index < inputBufferSize; index++)
{
encodedSample[index] = MuLawEncoder.LinearToMuLawSample(pcm[index]);
}
_peerConnection.SendAudioFrame((uint)outputBufferSize, _peerConnection.GetSendingFormat(SDPMediaTypesEnum.audio).FormatCodec.GetHashCode(), encodedSample);
}
}