public AudioResource(SpectrumVideoDemodConfig config, CanvasContext ctx)
{
//Set
this.label = config.label;
//Get demodulator
switch (config.demodType)
{
case "WBFM": demodulator = new WbFmDemodulator(); break;
default: throw new Exception("Unknown demodulator type.");
}
//Make buffers
bufferSize = ctx.BufferSize;
generalBuffer = UnsafeBuffer.Create(ctx.BufferSize, out generalBufferComplexPtr);
generalBufferFloatPtr = (float *)generalBufferComplexPtr;
audioABuffer = UnsafeBuffer.Create(ctx.BufferSize, out audioABufferPtr);
audioBBuffer = UnsafeBuffer.Create(ctx.BufferSize, out audioBBufferPtr);
//Init audio
demodDecimator = ComplexDecimator.CalculateDecimator(ctx.DecimatedSampleRate, config.demodBandwidth, 20, config.demodBandwidth * 0.05f, out float demodSampleRate);
float actualAudioRate = demodulator.Configure(ctx.BufferSize, demodSampleRate, config.outputSampleRate);
audioResampler = new ArbitraryStereoResampler(actualAudioRate, config.outputSampleRate, ctx.BufferSize);
//Create output
output = ctx.OutputProvider.GetAudioOutput(config.outputFilename, config.outputSampleRate, bufferSize);
}
protected override void PrepareBenchmark(int sampleRate, int bufferSize)
{
//Create buffers
iqBuffer = UnsafeBuffer.Create(bufferSize, out iqBufferPtr);
audioABuffer = UnsafeBuffer.Create(bufferSize, out audioABufferPtr);
audioBBuffer = UnsafeBuffer.Create(bufferSize, out audioBBufferPtr);
//Create IQ decimator
decimator = ComplexDecimator.CalculateDecimator(sampleRate, bandwidth, 15, bandwidth * 0.05f, out float decimatedIqRate);
//Create demodulator
demod = new WbFmDemodulator();
demod.Configure(bufferSize, sampleRate, DecimationUtil.CalculateDecimationRate(decimatedIqRate, outputRateTarget, out float actualOutputRate));
demod.UseRds();
}
