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);
}
public SpectrumVideoCanvas(SpectrumVideoSource source, SpectrumVideoCanvasConfig config, IOutputProvider outputProvider)
{
//Set
width = config.video_output.width;
label = config.label;
decimation = config.baseband.decimation;
frameRate = config.video_output.frameRate;
this.outputProvider = outputProvider;
this.source = source;
//Create IQ decimator and oscilator
oscillator = new Oscillator(SampleRate, config.baseband.freqOffset);
decimator = new ComplexDecimator(SampleRate, DecimatedSampleRate, config.baseband.decimation, config.baseband.decimationAttenuation, DecimatedSampleRate * config.baseband.decimationTransitionRatio);
//Create all audio resources
foreach (var o in config.audio_outputs)
{
AddResource(new AudioResource(o, this));
}
//Create all components
components = new SpectrumVideoComponent[config.components.Count];
componentOffsets = new int[config.components.Count];
for (int i = 0; i < components.Length; i++)
{
components[i] = ComponentFactory.MakeComponent(this, config.components[i]);
}
//Get the image dimensions by calculating the total height
height = 0;
for (int i = 0; i < components.Length; i++)
{
componentOffsets[i] = height * ImageWidth;
height += components[i].Height;
}
//Create misc
videoOutput = outputProvider.GetVideoOutput(config.video_output.filename, ImageWidth, ImageHeight, config.video_output.frameRate, BufferSize);
frameBuffer = UnsafeBuffer.Create(ImageWidth * ImageHeight, out frameBufferPtr);
buffer = UnsafeBuffer.Create(BufferSize, out bufferPtr);
textGenerator = FontStore.CreateRenderer(ImageWidth, ImageHeight);
//Fill the entire canvas with black
for (int i = 0; i < ImageWidth * ImageHeight; i++)
{
frameBufferPtr[i] = new UnsafeColor(0, 0, 0);
}
//Init all components
for (int i = 0; i < components.Length; i++)
{
components[i].Init();
components[i].InitFrame(frameBufferPtr + componentOffsets[i]);
}
}
public ViewGenerator(SavedViewData info, int bufferSize, float sampleRate)
{
//Set
this.info = info;
this.bufferSize = bufferSize;
//Configure offset
mutator = new DownConverter(1);
mutator.SampleRate = sampleRate;
mutator.Frequency = info.offset;
//Configure decimator
decimator = new ComplexDecimator(sampleRate, sampleRate / info.decimation, (int)info.decimation);
sampleRate /= info.decimation;
//Get component list and image size
components = info.CreateComponents(sampleRate, out width, out height);
//Find out what workers are required
foreach (var c in components)
{
fftRequired = fftRequired || c.RequiresFft;
demodulatorRequired = demodulatorRequired || c.RequiresAudio;
}
//Create these workers
if (fftRequired)
{
fft = new FFTProcessorComplex(info.fftSize);
}
if (demodulatorRequired)
{
//Set up decimator
audioDecimationRate = DecimationUtil.CalculateDecimationRate(sampleRate, info.audioBandwidth, out audioOutputRate);
audioDecimator = new ComplexDecimator(sampleRate, info.audioBandwidth, audioDecimationRate);
//Set up demodulator
demodulator = new WbFmDemodulator();
demodulator.Configure(bufferSize, audioOutputRate);
}
//Initialize all
foreach (var c in components)
{
c.Init(info, fft, demodulator);
}
//Create buffers
iqBuffer = UnsafeBuffer.Create(bufferSize, sizeof(Complex));
iqPtr = (Complex *)iqBuffer;
}
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();
}
