public static void Main(string[] argv)
		{
			ISampleProvider decoder = new AudioFileReader(FILE);
			SpectrumProvider spectrumProvider = new SpectrumProvider(decoder, 1024, HOP_SIZE, true);
			float[] spectrum = spectrumProvider.nextSpectrum();
			float[] lastSpectrum = new float[spectrum.Length];
			List<float> spectralFlux = new List<float>();

			do
			{
				float flux = 0;
				for(int i = 0; i < spectrum.Length; i++)
				{
					float @value = (spectrum[i] - lastSpectrum[i]);
					flux += @value < 0 ? 0 : @value;
				}
				spectralFlux.Add(flux);

				System.Array.Copy(spectrum, 0, lastSpectrum, 0, spectrum.Length);
			} while((spectrum = spectrumProvider.nextSpectrum()) != null);

			Plot plot = new Plot("Hopping Spectral Flux", 1024, 512);
			plot.plot(spectralFlux, 1, Color.Red);
			new PlaybackVisualizer(plot, HOP_SIZE, FILE);
		}
예제 #2
0
        public static void Main(string[] argv)
        {
            ISampleProvider  decoder          = new AudioFileReader(FILE);
            SpectrumProvider spectrumProvider = new SpectrumProvider(decoder, 1024, HOP_SIZE, true);

            float[]      spectrum     = spectrumProvider.nextSpectrum();
            float[]      lastSpectrum = new float[spectrum.Length];
            List <float> spectralFlux = new List <float>();

            do
            {
                float flux = 0;
                for (int i = 0; i < spectrum.Length; i++)
                {
                    float @value = (spectrum[i] - lastSpectrum[i]);
                    flux += @value < 0 ? 0 : @value;
                }
                spectralFlux.Add(flux);

                System.Array.Copy(spectrum, 0, lastSpectrum, 0, spectrum.Length);
            } while((spectrum = spectrumProvider.nextSpectrum()) != null);

            Plot plot = new Plot("Hopping Spectral Flux", 1024, 512);

            plot.plot(spectralFlux, 1, Color.Red);
            new PlaybackVisualizer(plot, HOP_SIZE, FILE);
        }
        public static void Main(string[] argv)
        {
            ISampleProvider  decoder          = new AudioFileReader(FILE);
            SpectrumProvider spectrumProvider = new SpectrumProvider(decoder, 1024, HOP_SIZE, true);

            float[] spectrum     = spectrumProvider.nextSpectrum();
            float[] lastSpectrum = new float[spectrum.Length];
            List <List <float> > spectralFlux = new List <List <float> >();

            for (int i = 0; i < bands.Length / 2; i++)
            {
                spectralFlux.Add(new List <float>());
            }

            do
            {
                for (int i = 0; i < bands.Length; i += 2)
                {
                    int   startFreq = spectrumProvider.getFFT().FreqToIndex(bands[i]);
                    int   endFreq   = spectrumProvider.getFFT().FreqToIndex(bands[i + 1]);
                    float flux      = 0;
                    for (int j = startFreq; j <= endFreq; j++)
                    {
                        float @value = (spectrum[j] - lastSpectrum[j]);
                        @value = (@value + Math.Abs(@value)) / 2;
                        flux  += @value;
                    }
                    spectralFlux[i / 2].Add(flux);
                }

                System.Array.Copy(spectrum, 0, lastSpectrum, 0, spectrum.Length);
            } while((spectrum = spectrumProvider.nextSpectrum()) != null);

            List <List <float> > thresholds = new List <List <float> >();

            for (int i = 0; i < bands.Length / 2; i++)
            {
                List <float> threshold = new ThresholdFunction(HISTORY_SIZE, multipliers[i]).calculate(spectralFlux[i]);
                thresholds.Add(threshold);
            }

            Plot plot = new Plot("Multiband Spectral Flux", 1024, 512);

            for (int i = 0; i < bands.Length / 2; i++)
            {
                plot.plot(spectralFlux[i], 1, -0.6f * (bands.Length / 2 - 2) + i, false, Color.Red);
                plot.plot(thresholds[i], 1, -0.6f * (bands.Length / 2 - 2) + i, true, Color.Green);
            }

            new PlaybackVisualizer(plot, HOP_SIZE, FILE);
        }
예제 #4
0
        public static void Main(string[] argv)
        {
            ISampleProvider decoder = new AudioFileReader(FILE);
            SpectrumProvider spectrumProvider = new SpectrumProvider(decoder, 1024, HOP_SIZE, true);
            float[] spectrum = spectrumProvider.nextSpectrum();
            float[] lastSpectrum = new float[spectrum.Length];
            List<List<float>> spectralFlux = new List<List<float>>();
            for(int i = 0; i < bands.Length / 2; i++) {
                spectralFlux.Add(new List<float>());
            }

            do {
                for(int i = 0; i < bands.Length; i+=2) {
                    int startFreq = spectrumProvider.getFFT().FreqToIndex(bands[i]);
                    int endFreq = spectrumProvider.getFFT().FreqToIndex(bands[i+1]);
                    float flux = 0;
                    for(int j = startFreq; j <= endFreq; j++)
                    {
                        float @value = (spectrum[j] - lastSpectrum[j]);
                        @value = (@value + Math.Abs(@value))/2;
                        flux += @value;
                    }
                    spectralFlux[i/2].Add(flux);
                }

                System.Array.Copy(spectrum, 0, lastSpectrum, 0, spectrum.Length);
            } while((spectrum = spectrumProvider.nextSpectrum()) != null);

            List<List<float>> thresholds = new List<List<float>>();
            for(int i = 0; i < bands.Length / 2; i++)
            {
                List<float> threshold = new ThresholdFunction(HISTORY_SIZE, multipliers[i]).calculate(spectralFlux[i]);
                thresholds.Add(threshold);
            }

            Plot plot = new Plot("Multiband Spectral Flux", 1024, 512);
            for(int i = 0; i < bands.Length / 2; i++)
            {
                plot.plot(spectralFlux[i], 1, -0.6f * (bands.Length / 2 - 2) + i, false, Color.Red);
                plot.plot(thresholds[i], 1, -0.6f * (bands.Length / 2 - 2) + i, true, Color.Green);
            }

            new PlaybackVisualizer(plot, HOP_SIZE, FILE);
        }