public void StartRecording()
{
if (Microphone.devices.Length == 0)
{
return;
}
inputFreq = AudioUtils.GetFreqForMic();
encoder = SpeexCodex.Create(BandMode.Wide);
var ratio = inputFreq / (float)AudioUtils.GetFrequency(encoder.mode);
int sizeRequired = (int)(ratio * encoder.dataSize);
recordingBuffer = new float[sizeRequired];
resampleBuffer = new float[encoder.dataSize];
if (AudioUtils.GetFrequency(encoder.mode) == inputFreq)
{
recordingBuffer = resampleBuffer;
}
recording = Microphone.Start(null, true, 20, inputFreq);
Plugin.log.Info("Used mic sample rate: " + inputFreq + "Hz");
}
public SpeexCodex(BandMode mode)
{
this.mode = mode;
encoder = new NSpeex.SpeexEncoder(SpeedxMode);
decoder = new NSpeex.SpeexDecoder(SpeedxMode, false);
encoder.VBR = true;
encoder.Quality = 4;
dataSize = encoder.FrameSize * (mode == BandMode.Narrow ? 8 : mode == BandMode.Wide ? 8 : 2);
encodingBuffer = new short[dataSize];
encodedBuffer = new byte[dataSize];
decodeBuffer = new short[dataSize];
decodedBuffer = new float[dataSize];
int frequency = AudioUtils.GetFrequency(mode);
var time = frequency / (float)dataSize;
UnityEngine.Debug.Log("SpeedCodex created mode:" + mode + " dataSize:" + dataSize + " time:" + time);
}
void Update()
{
if (recording == null)
{
return;
}
var now = Microphone.GetPosition(null);
var length = now - lastPos;
if (now < lastPos)
{
lastPos = 0;
length = now;
}
while (length >= recordingBuffer.Length)
{
if (_isListening && recording.GetData(recordingBuffer, lastPos))
{
//Send..
var amplitude = AudioUtils.GetMaxAmplitude(recordingBuffer);
if (amplitude >= minAmplitude)
{
index++;
if (OnAudioGenerated != null)
{
//Downsample if needed.
if (recordingBuffer != resampleBuffer)
{
AudioUtils.Resample(recordingBuffer, resampleBuffer, inputFreq, AudioUtils.GetFrequency(encoder.mode));
}
var data = encoder.Encode(resampleBuffer);
VoipFragment frag = new VoipFragment(0, index, data, encoder.mode);
OnAudioGenerated?.Invoke(frag);
}
}
}
length -= recordingBuffer.Length;
lastPos += recordingBuffer.Length;
}
}
void Update()
{
if (recording == null)
{
return;
}
var now = Microphone.GetPosition(null);
var length = now - lastPos;
if (now < lastPos)
{
lastPos = 0;
length = now;
}
while (length >= recordingBuffer.Length)
{
if (recording.GetData(recordingBuffer, lastPos))
{
//Send..
var amplitude = AudioUtils.GetMaxAmplitude(recordingBuffer);
if (amplitude >= minAmplitude)
{
index++;
if (OnAudioGenerated != null)
{
chunkCount++;
//Downsample if needed.
if (recordingBuffer != resampleBuffer)
{
AudioUtils.Resample(recordingBuffer, resampleBuffer, inputFreq, AudioUtils.GetFrequency(encoder.mode));
}
var data = encoder.Encode(resampleBuffer);
bytes += data.Length + 11;
VoipFragment frag = new VoipFragment(0, index, data, encoder.mode);
foreach (var action in OnAudioGenerated.GetInvocationList())
{
try
{
action.DynamicInvoke(frag);
}
catch (Exception e)
{
Misc.Logger.Error($"Exception on OnAudioGenerated event in {action.Target.GetType().ToString()}.{action.Method.Name}: {e}");
}
}
}
}
}
length -= recordingBuffer.Length;
lastPos += recordingBuffer.Length;
}
UpdateStats();
}