public void TimerUpdateEventHandler(object sender, EventArgs eventArgs)
{
BassWasapi.GetData(null, (int)DataFlags.Available);
// Note: The DataFlags seems to be offset by one (e.g. FFT256 only fills 128 entries)
const int get256FftValues = (int)DataFlags.FFT512;
// Get FFT data. Return value is -1 on error
var result = BassWasapi.GetData(FftBuffer, get256FftValues);
if (result < 0)
{
Log.Debug("No new Data");
return;
}
var level = BassWasapi.GetLevel();
// Required, because some programs hang the output. If the output hangs for a 75ms
// this piece of code re initializes the output so it doesn't make a glitched sound for long.
if (level == _lastLevel && level > 0)
{
//Log.Debug(" not changed");
if (_hangCounter++ > 10)
{
Log.Warning("Looks like sound got lost. Trying to restart.");
_hangCounter = 0;
Free();
InitBass();
_initialized = false;
SetEnableWasapi(true);
}
return;
}
_lastLevel = level;
_hangCounter = 0;
}
private static int Process(IntPtr buffer, int length, IntPtr user)
{
var level = BassWasapi.GetLevel();
if (length < 3000)
{
return(length);
}
int resultCode;
if (_fftUpdatesSinceLastFrame == 0)
{
resultCode = BassWasapi.GetData(AudioAnalysis.FftGainBuffer, (int)(AudioAnalysis.BassFlagForFftBufferSize | DataFlags.FFTRemoveDC));
}
else
{
resultCode = BassWasapi.GetData(_fftIntermediate, (int)(AudioAnalysis.BassFlagForFftBufferSize | DataFlags.FFTRemoveDC));
if (resultCode >= 0)
{
for (var i = 0; i < AudioAnalysis.FftHalfSize; i++)
{
AudioAnalysis.FftGainBuffer[i] = MathF.Max(_fftIntermediate[i], AudioAnalysis.FftGainBuffer[i]);
}
}
}
if (resultCode < 0)
{
Log.Debug($"Can't get Wasapi FFT-Data: {Bass.LastError}");
}
var audioLevel = level * 0.00001;
_fftUpdatesSinceLastFrame++;
//Log.Debug($"Process with {length} #{_fftUpdatesSinceLastFrame} L:{audioLevel:0.0} DevBufLen:{BassWasapi.Info.BufferLength}");
return(length);
}