public AudioCaptureAgent()
{
_capture = new NAudio.CoreAudioApi.WasapiLoopbackCapture();
_processor = new AudioCaptureProcessor();
_capture.RecordingStopped += AudioCaptureProcessor.handleEndOfAudio;
_capture.DataAvailable += _processor.handleAudioData;
_capture.StartRecording();
}
public void handleAudioData(object sender, WaveInEventArgs args)
{
NAudio.CoreAudioApi.WasapiLoopbackCapture capture = (NAudio.CoreAudioApi.WasapiLoopbackCapture)sender;
//left channel = first 4 bytes;
//right channel = next 4;
for (int i = 0; i < args.BytesRecorded; i += 8)
{
if (currentIdx < buffer.Length)
{
float left = BitConverter.ToSingle(args.Buffer, i);
float right = BitConverter.ToSingle(args.Buffer, i + 4);
float combined = (left + right) / 2;
buffer[currentIdx++] = new System.Numerics.Complex(combined, 0);
}
else
{
currentIdx = 0;
int sampleRate = capture.WaveFormat.SampleRate;
Fourier.Radix2Forward(buffer, FourierOptions.Default);
double BASS = 0;
double MIDS = 0;
double TREBS = 0;
for (int m = 0; m < buffer.Length; m++)
{
double f_m = m / (buffer.Length / (double)sampleRate);
if (f_m < vlb)
{
BASS += buffer[m].Magnitude;
}
else if (f_m < mb)
{
BASS += buffer[m].Magnitude;
}
else if (f_m < hb)
{
BASS += buffer[m].Magnitude;
}
else if (f_m < lmr)
{
MIDS += buffer[m].Magnitude;
}
else if (f_m < mmr)
{
MIDS += buffer[m].Magnitude;
}
else if (f_m < hmr)
{
MIDS += buffer[m].Magnitude;
}
else if (f_m < tr)
{
TREBS += buffer[m].Magnitude;
}
else
{
break;
}
}
//if (FrequencyDataAvailable != null)
//{
// FrequencyDataAvailable(this, new FrequencyEventArgs(new FrequencyInfo(BASS, MIDS, TREBS)));
//}
}
}
}
