115 lines
5 KiB
C
115 lines
5 KiB
C
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/* Copyright (c) 2007-2008 CSIRO
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Copyright (c) 2007-2009 Xiph.Org Foundation
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Copyright (c) 2008-2009 Gregory Maxwell
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Written by Jean-Marc Valin and Gregory Maxwell */
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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 COPYRIGHT OWNER
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OR 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 "opus_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 bandE 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 *X, celt_ener *bandE, int end, int C, int M);
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/*void compute_noise_energies(const CELTMode *m, const celt_sig *X, const opus_val16 *tonality, celt_ener *bandE);*/
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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 bandE 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 * OPUS_RESTRICT freq, celt_norm * OPUS_RESTRICT X, const celt_ener *bandE, int end, int C, int M);
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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 bandE 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 * OPUS_RESTRICT X,
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celt_sig * OPUS_RESTRICT freq, const opus_val16 *bandE, int start, int end, int C, int M);
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#define SPREAD_NONE (0)
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#define SPREAD_LIGHT (1)
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#define SPREAD_NORMAL (2)
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#define SPREAD_AGGRESSIVE (3)
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int spreading_decision(const CELTMode *m, celt_norm *X, int *average,
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int last_decision, int *hf_average, int *tapset_decision, int update_hf,
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int end, int C, int M);
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#ifdef MEASURE_NORM_MSE
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void measure_norm_mse(const CELTMode *m, float *X, float *X0, float *bandE, float *bandE0, int M, int N, int C);
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#endif
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void haar1(celt_norm *X, int N0, int stride);
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/** Quantisation/encoding of the residual spectrum
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* @param encode flag that indicates whether we're encoding (1) or decoding (0)
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* @param m Mode data
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* @param start First band to process
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* @param end Last band to process + 1
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* @param X Residual (normalised)
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* @param Y Residual (normalised) for second channel (or NULL for mono)
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* @param collapse_masks Anti-collapse tracking mask
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* @param bandE Square root of the energy for each band
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* @param pulses Bit allocation (per band) for PVQ
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* @param shortBlocks Zero for long blocks, non-zero for short blocks
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* @param spread Amount of spreading to use
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* @param dual_stereo Zero for MS stereo, non-zero for dual stereo
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* @param intensity First band to use intensity stereo
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* @param tf_res Time-frequency resolution change
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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 balance Number of unallocated bits
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* @param en Entropy coder state
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* @param LM log2() of the number of 2.5 subframes in the frame
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* @param codedBands Last band to receive bits + 1
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* @param seed Random generator seed
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*/
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void quant_all_bands(int encode, const CELTMode *m, int start, int end,
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celt_norm * X, celt_norm * Y, unsigned char *collapse_masks, const celt_ener *bandE, int *pulses,
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int shortBlocks, int spread, int dual_stereo, int intensity, int *tf_res,
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opus_int32 total_bits, opus_int32 balance, ec_ctx *ec, int M, int codedBands, opus_uint32 *seed);
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void anti_collapse(const CELTMode *m, celt_norm *X_, unsigned char *collapse_masks, int LM, int C, int size,
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int start, int end, opus_val16 *logE, opus_val16 *prev1logE,
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opus_val16 *prev2logE, int *pulses, opus_uint32 seed);
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opus_uint32 celt_lcg_rand(opus_uint32 seed);
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int hysteresis_decision(opus_val16 val, const opus_val16 *thresholds, const opus_val16 *hysteresis, int N, int prev);
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#endif /* BANDS_H */
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