Matiq
7dcbcf49b4
- Cooley-Tukey radix-2 FFT (forward + inverse with /N normalization) - WOLA STFT/ISTFT with Hann window (nfft=2048, hop=512) - WAV16 read + WAV24 write (fixed aliasing bug in read) - Fixed in-place processing bug (separate input/output buffers) - Biquad filter (peak/shelf/reject) - Peak detector skeleton - MS encode/decode (M8 stereo) - Harness: WAV16 → STFT → WAV24 passthrough verified non-zero output Verified: burst500.wav passthrough produces output RMS=0.0678
35 lines
856 B
C++
35 lines
856 B
C++
#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <complex>
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#include <vector>
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#include "fft.hpp"
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constexpr size_t DEFAULT_NFFT = 2048;
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constexpr size_t DEFAULT_HOP = 512;
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class SpectralProcessor {
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public:
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SpectralProcessor(size_t nfft = DEFAULT_NFFT, size_t hop = DEFAULT_HOP);
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~SpectralProcessor();
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void processBlock(float* in, float* out, size_t num_samples, size_t num_channels = 1);
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private:
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size_t nfft_;
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size_t hop_;
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double* window_;
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FFTPlan plan_;
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std::complex<double>* buf_;
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std::complex<double>* tmp_buf_;
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std::vector<float> overlap_;
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size_t frame_count_;
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size_t output_pos_;
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void computeWindow();
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void stftFrame(const float* in, std::complex<double>* out);
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void istftFrame(std::complex<double>* in, float* out, float* overlap);
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void updateDetector();
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};
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