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75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
/* Copyright (c) 2017-2018 Mozilla */
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define PREEMPHASIS (0.85f)
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#define FRAME_SIZE_SHIFT 2
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#define FRAME_SIZE (40<<FRAME_SIZE_SHIFT)
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#define WINDOW_SIZE (2*FRAME_SIZE)
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#define FREQ_SIZE (FRAME_SIZE + 1)
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#define NB_BANDS 18
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#ifndef RNNOISE_EXPORT
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# if defined(WIN32)
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# if defined(RNNOISE_BUILD) && defined(DLL_EXPORT)
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# define RNNOISE_EXPORT __declspec(dllexport)
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# else
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# define RNNOISE_EXPORT
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# endif
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# elif defined(__GNUC__) && defined(RNNOISE_BUILD)
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# define RNNOISE_EXPORT __attribute__ ((visibility ("default")))
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# else
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# define RNNOISE_EXPORT
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# endif
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#endif
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typedef struct DenoiseState DenoiseState;
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RNNOISE_EXPORT int rnnoise_get_size();
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RNNOISE_EXPORT int rnnoise_init(DenoiseState *st);
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RNNOISE_EXPORT DenoiseState *rnnoise_create();
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RNNOISE_EXPORT void rnnoise_destroy(DenoiseState *st);
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RNNOISE_EXPORT float rnnoise_process_frame(DenoiseState *st, float *out, const float *in);
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void compute_band_energy(float *bandE, const kiss_fft_cpx *X);
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void compute_band_corr(float *bandE, const kiss_fft_cpx *X, const kiss_fft_cpx *P);
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void apply_window(float *x);
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void dct(float *out, const float *in);
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void idct(float *out, const float *in);
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void forward_transform(kiss_fft_cpx *out, const float *in);
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void inverse_transform(float *out, const kiss_fft_cpx *in);
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float lpc_from_bands(float *lpc, const float *Ex);
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float lpc_from_cepstrum(float *lpc, const float *cepstrum);
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void apply_window(float *x);
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