Chris@69: /* Copyright (c) 2007-2008 CSIRO
Chris@69:    Copyright (c) 2007-2009 Xiph.Org Foundation
Chris@69:    Copyright (c) 2008-2009 Gregory Maxwell
Chris@69:    Written by Jean-Marc Valin and Gregory Maxwell */
Chris@69: /*
Chris@69:    Redistribution and use in source and binary forms, with or without
Chris@69:    modification, are permitted provided that the following conditions
Chris@69:    are met:
Chris@69: 
Chris@69:    - Redistributions of source code must retain the above copyright
Chris@69:    notice, this list of conditions and the following disclaimer.
Chris@69: 
Chris@69:    - Redistributions in binary form must reproduce the above copyright
Chris@69:    notice, this list of conditions and the following disclaimer in the
Chris@69:    documentation and/or other materials provided with the distribution.
Chris@69: 
Chris@69:    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
Chris@69:    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
Chris@69:    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
Chris@69:    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
Chris@69:    OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
Chris@69:    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
Chris@69:    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
Chris@69:    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
Chris@69:    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
Chris@69:    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
Chris@69:    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Chris@69: */
Chris@69: 
Chris@69: #ifndef BANDS_H
Chris@69: #define BANDS_H
Chris@69: 
Chris@69: #include "arch.h"
Chris@69: #include "modes.h"
Chris@69: #include "entenc.h"
Chris@69: #include "entdec.h"
Chris@69: #include "rate.h"
Chris@69: 
Chris@69: opus_int16 bitexact_cos(opus_int16 x);
Chris@69: int bitexact_log2tan(int isin,int icos);
Chris@69: 
Chris@69: /** Compute the amplitude (sqrt energy) in each of the bands
Chris@69:  * @param m Mode data
Chris@69:  * @param X Spectrum
Chris@69:  * @param bandE Square root of the energy for each band (returned)
Chris@69:  */
Chris@69: void compute_band_energies(const CELTMode *m, const celt_sig *X, celt_ener *bandE, int end, int C, int LM, int arch);
Chris@69: 
Chris@69: /*void compute_noise_energies(const CELTMode *m, const celt_sig *X, const opus_val16 *tonality, celt_ener *bandE);*/
Chris@69: 
Chris@69: /** Normalise each band of X such that the energy in each band is
Chris@69:     equal to 1
Chris@69:  * @param m Mode data
Chris@69:  * @param X Spectrum (returned normalised)
Chris@69:  * @param bandE Square root of the energy for each band
Chris@69:  */
Chris@69: 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);
Chris@69: 
Chris@69: /** Denormalise each band of X to restore full amplitude
Chris@69:  * @param m Mode data
Chris@69:  * @param X Spectrum (returned de-normalised)
Chris@69:  * @param bandE Square root of the energy for each band
Chris@69:  */
Chris@69: void denormalise_bands(const CELTMode *m, const celt_norm * OPUS_RESTRICT X,
Chris@69:       celt_sig * OPUS_RESTRICT freq, const opus_val16 *bandE, int start,
Chris@69:       int end, int M, int downsample, int silence);
Chris@69: 
Chris@69: #define SPREAD_NONE       (0)
Chris@69: #define SPREAD_LIGHT      (1)
Chris@69: #define SPREAD_NORMAL     (2)
Chris@69: #define SPREAD_AGGRESSIVE (3)
Chris@69: 
Chris@69: int spreading_decision(const CELTMode *m, const celt_norm *X, int *average,
Chris@69:       int last_decision, int *hf_average, int *tapset_decision, int update_hf,
Chris@69:       int end, int C, int M, const int *spread_weight);
Chris@69: 
Chris@69: #ifdef MEASURE_NORM_MSE
Chris@69: void measure_norm_mse(const CELTMode *m, float *X, float *X0, float *bandE, float *bandE0, int M, int N, int C);
Chris@69: #endif
Chris@69: 
Chris@69: void haar1(celt_norm *X, int N0, int stride);
Chris@69: 
Chris@69: /** Quantisation/encoding of the residual spectrum
Chris@69:  * @param encode flag that indicates whether we're encoding (1) or decoding (0)
Chris@69:  * @param m Mode data
Chris@69:  * @param start First band to process
Chris@69:  * @param end Last band to process + 1
Chris@69:  * @param X Residual (normalised)
Chris@69:  * @param Y Residual (normalised) for second channel (or NULL for mono)
Chris@69:  * @param collapse_masks Anti-collapse tracking mask
Chris@69:  * @param bandE Square root of the energy for each band
Chris@69:  * @param pulses Bit allocation (per band) for PVQ
Chris@69:  * @param shortBlocks Zero for long blocks, non-zero for short blocks
Chris@69:  * @param spread Amount of spreading to use
Chris@69:  * @param dual_stereo Zero for MS stereo, non-zero for dual stereo
Chris@69:  * @param intensity First band to use intensity stereo
Chris@69:  * @param tf_res Time-frequency resolution change
Chris@69:  * @param total_bits Total number of bits that can be used for the frame (including the ones already spent)
Chris@69:  * @param balance Number of unallocated bits
Chris@69:  * @param en Entropy coder state
Chris@69:  * @param LM log2() of the number of 2.5 subframes in the frame
Chris@69:  * @param codedBands Last band to receive bits + 1
Chris@69:  * @param seed Random generator seed
Chris@69:  * @param arch Run-time architecture (see opus_select_arch())
Chris@69:  */
Chris@69: void quant_all_bands(int encode, const CELTMode *m, int start, int end,
Chris@69:       celt_norm * X, celt_norm * Y, unsigned char *collapse_masks,
Chris@69:       const celt_ener *bandE, int *pulses, int shortBlocks, int spread,
Chris@69:       int dual_stereo, int intensity, int *tf_res, opus_int32 total_bits,
Chris@69:       opus_int32 balance, ec_ctx *ec, int M, int codedBands, opus_uint32 *seed,
Chris@69:       int complexity, int arch, int disable_inv);
Chris@69: 
Chris@69: void anti_collapse(const CELTMode *m, celt_norm *X_,
Chris@69:       unsigned char *collapse_masks, int LM, int C, int size, int start,
Chris@69:       int end, const opus_val16 *logE, const opus_val16 *prev1logE,
Chris@69:       const opus_val16 *prev2logE, const int *pulses, opus_uint32 seed,
Chris@69:       int arch);
Chris@69: 
Chris@69: opus_uint32 celt_lcg_rand(opus_uint32 seed);
Chris@69: 
Chris@69: int hysteresis_decision(opus_val16 val, const opus_val16 *thresholds, const opus_val16 *hysteresis, int N, int prev);
Chris@69: 
Chris@69: #endif /* BANDS_H */