104 lines
4.8 KiB
C
104 lines
4.8 KiB
C
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/* (C) 2007 Jean-Marc Valin, CSIRO
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*/
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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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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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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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#ifndef BANDS_H
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#define BANDS_H
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#include "arch.h"
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#include "modes.h"
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#include "entenc.h"
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#include "entdec.h"
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#include "rate.h"
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/** Compute the amplitude (sqrt energy) in each of the bands
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* @param m Mode data
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* @param X Spectrum
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* @param bands Square root of the energy for each band (returned)
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*/
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void compute_band_energies(const CELTMode *m, const celt_sig_t *X, celt_ener_t *bands);
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void compute_noise_energies(const CELTMode *m, const celt_sig_t *X, const celt_word16_t *tonality, celt_ener_t *bank);
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/** Normalise each band of X such that the energy in each band is
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equal to 1
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* @param m Mode data
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* @param X Spectrum (returned normalised)
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* @param bands Square root of the energy for each band
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*/
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void normalise_bands(const CELTMode *m, const celt_sig_t * restrict freq, celt_norm_t * restrict X, const celt_ener_t *bands);
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void renormalise_bands(const CELTMode *m, celt_norm_t * restrict X);
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/** Denormalise each band of X to restore full amplitude
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* @param m Mode data
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* @param X Spectrum (returned de-normalised)
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* @param bands Square root of the energy for each band
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*/
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void denormalise_bands(const CELTMode *m, const celt_norm_t * restrict X, celt_sig_t * restrict freq, const celt_ener_t *bands);
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/** Compute the pitch predictor gain for each pitch band
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* @param m Mode data
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* @param X Spectrum to predict
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* @param P Pitch vector (normalised)
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* @param gains Gain computed for each pitch band (returned)
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* @param bank Square root of the energy for each band
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*/
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int compute_pitch_gain(const CELTMode *m, const celt_norm_t *X, const celt_norm_t *P, celt_pgain_t *gains);
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int folding_decision(const CELTMode *m, celt_norm_t *X, celt_word16_t *average, int *last_decision);
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/** Quantisation/encoding of the residual spectrum
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* @param m Mode data
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* @param X Residual (normalised)
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* @param P Pitch vector (normalised)
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* @param W Perceptual weighting
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* @param total_bits Total number of bits that can be used for the frame (including the ones already spent)
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* @param enc Entropy encoder
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*/
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void quant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, celt_mask_t *W, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int time_domain, int fold, int total_bits, ec_enc *enc);
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void quant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, celt_mask_t *W, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int time_domain, int fold, int total_bits, ec_enc *enc);
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/** Decoding of the residual spectrum
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* @param m Mode data
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* @param X Residual (normalised)
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* @param P Pitch vector (normalised)
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* @param total_bits Total number of bits that can be used for the frame (including the ones already spent)
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* @param dec Entropy decoder
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*/
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void unquant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int time_domain, int fold, int total_bits, ec_dec *dec);
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void unquant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int time_domain, int fold, int total_bits, ec_dec *dec);
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void stereo_decision(const CELTMode *m, celt_norm_t * restrict X, int *stereo_mode, int len);
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#endif /* BANDS_H */
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