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(); }