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remove legacy code
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src/ext/cqt.c
-79
src/ext/cqt.c
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}
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}
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// Process CQT from audio data (using existing FFT data from fftdata.h)
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// This is kept for backward compatibility, but not used
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void CQT_Process(const float* fftReal, const float* fftImag)
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{
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if (!cqtFftCfg || !cqtEnabled) return;
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// Apply CQT kernels
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CQT_ApplyKernels(fftReal, fftImag);
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// Apply spectral whitening if enabled
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#if CQT_SPECTRAL_WHITENING_ENABLED
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for (int i = 0; i < CQT_BINS; i++)
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{
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// Update running average for this bin
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cqtBinAverages[i] = cqtBinAverages[i] * CQT_WHITENING_DECAY +
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cqtData[i] * (1.0f - CQT_WHITENING_DECAY);
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// Ensure average doesn't go below floor
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if (cqtBinAverages[i] < CQT_WHITENING_FLOOR)
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cqtBinAverages[i] = CQT_WHITENING_FLOOR;
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// Apply whitening by dividing by the average
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cqtWhitenedData[i] = cqtData[i] / cqtBinAverages[i];
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// Check for NaN or Inf
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if (!isfinite(cqtWhitenedData[i]))
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cqtWhitenedData[i] = 0.0f;
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}
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// Apply smoothing to whitened data
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for (int i = 0; i < CQT_BINS; i++)
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{
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cqtSmoothingData[i] = cqtSmoothingData[i] * CQT_SMOOTHING_FACTOR +
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cqtWhitenedData[i] * (1.0f - CQT_SMOOTHING_FACTOR);
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}
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#else
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// Apply smoothing to raw data (spectral whitening disabled)
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for (int i = 0; i < CQT_BINS; i++)
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{
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cqtSmoothingData[i] = cqtSmoothingData[i] * CQT_SMOOTHING_FACTOR +
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cqtData[i] * (1.0f - CQT_SMOOTHING_FACTOR);
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}
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#endif
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// Find peak for normalization
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float currentPeak = 0.0f;
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for (int i = 0; i < CQT_BINS; i++)
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{
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if (cqtSmoothingData[i] > currentPeak)
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currentPeak = cqtSmoothingData[i];
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}
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// Initialize peak value if needed
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if (cqtPeakSmoothValue <= 0.0f)
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cqtPeakSmoothValue = 0.1f;
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// Smooth peak value
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if (currentPeak > cqtPeakSmoothValue)
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cqtPeakSmoothValue = currentPeak;
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else
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cqtPeakSmoothValue = cqtPeakSmoothValue * 0.99f + currentPeak * 0.01f;
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// Ensure peak value doesn't go too low
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if (cqtPeakSmoothValue < 0.0001f)
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cqtPeakSmoothValue = 0.0001f;
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// Normalize data
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float normalizer = 1.0f / cqtPeakSmoothValue;
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for (int i = 0; i < CQT_BINS; i++)
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{
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cqtNormalizedData[i] = cqtSmoothingData[i] * normalizer;
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if (cqtNormalizedData[i] > 1.0f)
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cqtNormalizedData[i] = 1.0f;
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// Final NaN check
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if (!isfinite(cqtNormalizedData[i]))
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cqtNormalizedData[i] = 0.0f;
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}
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}
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// Close CQT processing and free resources
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void CQT_Close(void)
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src/ext/cqt.h
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src/ext/cqt.h
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// Process CQT from audio buffer (uses shared audio capture buffer)
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void CQT_ProcessAudio(void);
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// Process CQT from FFT data (legacy)
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// fftData: Complex FFT output (size should be CQT_FFT_SIZE/2 + 1)
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void CQT_Process(const float* fftReal, const float* fftImag);
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// Close CQT processing and free resources
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void CQT_Close(void);
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