public PlayAudio(VoiceService voices, int frameSize, RemoteVoice user)
{
Voices = voices;
User = user;
CallbackHandler = new WinMM.WaveDelegate(WaveCallback);
FrameSize = frameSize;
int sampleRate = 0;
// if 20ms, at high quality (16khz) is 320 samples at 2 bytes each
if (FrameSize == 320)
{
sampleRate = 16000;
BufferSize = 320 * 2 * 2; // 2 bytes each frame, 2 channels
SpeexMode = Speex.SPEEX_MODEID_WB;
}
else if (FrameSize == 160)
{
sampleRate = 8000;
BufferSize = 160 * 2 * 2;
SpeexMode = Speex.SPEEX_MODEID_NB;
}
else
{
Dispose();
return;
}
try
{
// init speex
Speex.speex_bits_init(ref DecodeBits);
IntPtr modePtr = Speex.speex_lib_get_mode(SpeexMode);
SpeexDecoder = Speex.speex_decoder_init(modePtr);
int tmp = 1;
Speex.speex_decoder_ctl(SpeexDecoder, Speex.SPEEX_SET_ENH, ref tmp);
// init wave
Format = new WinMM.WaveFormat(sampleRate, 16, 2);
WinMM.ErrorCheck(WinMM.waveOutOpen(out WaveHandle, Voices.PlaybackDevice, Format, CallbackHandler, 0, WinMM.CALLBACK_FUNCTION));
for (int i = 0; i < BufferCount; i++)
{
Buffers[i] = new PlayBuffer(i, WaveHandle, BufferSize);
}
}
catch (Exception ex)
{
Dispose();
Voices.Core.Network.UpdateLog("Voice", "Error starting playing: " + ex.Message);
}
}
private void InitSpeexEncoder()
{
// init
Speex.speex_bits_init(ref EncodeBits);
// get narrow band mode
IntPtr modePtr = Speex.speex_lib_get_mode(SpeexMode);
SpeexEncoder = Speex.speex_encoder_init(modePtr);
//int zeroNoError = 0;
int tmp = 0; // no variable bit rate
Speex.speex_encoder_ctl(SpeexEncoder, Speex.SPEEX_SET_VBR, ref tmp);
tmp = 4; // ok quality
Speex.speex_encoder_ctl(SpeexEncoder, Speex.SPEEX_SET_QUALITY, ref tmp);
tmp = 1; // uses a little more cpu for better processing
Speex.speex_encoder_ctl(SpeexEncoder, Speex.SPEEX_SET_COMPLEXITY, ref tmp);
tmp = 1; // voice activated, deadspace is not encoded
Speex.speex_encoder_ctl(SpeexEncoder, Speex.SPEEX_SET_VAD, ref tmp);
tmp = 1; // dead space no transmission
Speex.speex_encoder_ctl(SpeexEncoder, Speex.SPEEX_SET_DTX, ref tmp);
Speex.speex_encoder_ctl(SpeexEncoder, Speex.SPEEX_GET_FRAME_SIZE, ref FrameSize);
Debug.Assert(FrameSize == BufferSize / 2);
if (FrameSize != BufferSize / 2)
{
throw new Exception("Frame size " + FrameSize + " did agree with buffer " + BufferSize);
}
/* Turn this off if you want to measure SNR (on by default) */
tmp = 1;
Speex.speex_encoder_ctl(SpeexEncoder, Speex.SPEEX_SET_HIGHPASS, ref tmp);
// pre-processor
PreProcessor = Speex.speex_preprocess_state_init(FrameSize, SampleRate);
tmp = 1;
Speex.speex_preprocess_ctl(PreProcessor, Speex.SPEEX_PREPROCESS_SET_DENOISE, ref tmp);
// echo cancelation
//EchoState = Speex.speex_echo_state_init(FrameSize, FrameSize * 3); // 100ms tail length suggested
//Speex.speex_preprocess_ctl(PreProcessor, Speex.SPEEX_PREPROCESS_SET_ECHO_STATE, EchoState);
EncodedBytes = new byte[BufferSize];
}