cannam@154: /* Copyright (c) 2007-2008 CSIRO
cannam@154:    Copyright (c) 2007-2009 Xiph.Org Foundation
cannam@154:    Copyright (c) 2008-2009 Gregory Maxwell
cannam@154:    Written by Jean-Marc Valin and Gregory Maxwell */
cannam@154: /*
cannam@154:    Redistribution and use in source and binary forms, with or without
cannam@154:    modification, are permitted provided that the following conditions
cannam@154:    are met:
cannam@154: 
cannam@154:    - Redistributions of source code must retain the above copyright
cannam@154:    notice, this list of conditions and the following disclaimer.
cannam@154: 
cannam@154:    - Redistributions in binary form must reproduce the above copyright
cannam@154:    notice, this list of conditions and the following disclaimer in the
cannam@154:    documentation and/or other materials provided with the distribution.
cannam@154: 
cannam@154:    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
cannam@154:    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
cannam@154:    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
cannam@154:    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
cannam@154:    OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
cannam@154:    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
cannam@154:    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
cannam@154:    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
cannam@154:    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
cannam@154:    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
cannam@154:    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
cannam@154: */
cannam@154: 
cannam@154: #ifndef BANDS_H
cannam@154: #define BANDS_H
cannam@154: 
cannam@154: #include "arch.h"
cannam@154: #include "modes.h"
cannam@154: #include "entenc.h"
cannam@154: #include "entdec.h"
cannam@154: #include "rate.h"
cannam@154: 
cannam@154: opus_int16 bitexact_cos(opus_int16 x);
cannam@154: int bitexact_log2tan(int isin,int icos);
cannam@154: 
cannam@154: /** Compute the amplitude (sqrt energy) in each of the bands
cannam@154:  * @param m Mode data
cannam@154:  * @param X Spectrum
cannam@154:  * @param bandE Square root of the energy for each band (returned)
cannam@154:  */
cannam@154: void compute_band_energies(const CELTMode *m, const celt_sig *X, celt_ener *bandE, int end, int C, int LM, int arch);
cannam@154: 
cannam@154: /*void compute_noise_energies(const CELTMode *m, const celt_sig *X, const opus_val16 *tonality, celt_ener *bandE);*/
cannam@154: 
cannam@154: /** Normalise each band of X such that the energy in each band is
cannam@154:     equal to 1
cannam@154:  * @param m Mode data
cannam@154:  * @param X Spectrum (returned normalised)
cannam@154:  * @param bandE Square root of the energy for each band
cannam@154:  */
cannam@154: 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);
cannam@154: 
cannam@154: /** Denormalise each band of X to restore full amplitude
cannam@154:  * @param m Mode data
cannam@154:  * @param X Spectrum (returned de-normalised)
cannam@154:  * @param bandE Square root of the energy for each band
cannam@154:  */
cannam@154: void denormalise_bands(const CELTMode *m, const celt_norm * OPUS_RESTRICT X,
cannam@154:       celt_sig * OPUS_RESTRICT freq, const opus_val16 *bandE, int start,
cannam@154:       int end, int M, int downsample, int silence);
cannam@154: 
cannam@154: #define SPREAD_NONE       (0)
cannam@154: #define SPREAD_LIGHT      (1)
cannam@154: #define SPREAD_NORMAL     (2)
cannam@154: #define SPREAD_AGGRESSIVE (3)
cannam@154: 
cannam@154: int spreading_decision(const CELTMode *m, const celt_norm *X, int *average,
cannam@154:       int last_decision, int *hf_average, int *tapset_decision, int update_hf,
cannam@154:       int end, int C, int M, const int *spread_weight);
cannam@154: 
cannam@154: #ifdef MEASURE_NORM_MSE
cannam@154: void measure_norm_mse(const CELTMode *m, float *X, float *X0, float *bandE, float *bandE0, int M, int N, int C);
cannam@154: #endif
cannam@154: 
cannam@154: void haar1(celt_norm *X, int N0, int stride);
cannam@154: 
cannam@154: /** Quantisation/encoding of the residual spectrum
cannam@154:  * @param encode flag that indicates whether we're encoding (1) or decoding (0)
cannam@154:  * @param m Mode data
cannam@154:  * @param start First band to process
cannam@154:  * @param end Last band to process + 1
cannam@154:  * @param X Residual (normalised)
cannam@154:  * @param Y Residual (normalised) for second channel (or NULL for mono)
cannam@154:  * @param collapse_masks Anti-collapse tracking mask
cannam@154:  * @param bandE Square root of the energy for each band
cannam@154:  * @param pulses Bit allocation (per band) for PVQ
cannam@154:  * @param shortBlocks Zero for long blocks, non-zero for short blocks
cannam@154:  * @param spread Amount of spreading to use
cannam@154:  * @param dual_stereo Zero for MS stereo, non-zero for dual stereo
cannam@154:  * @param intensity First band to use intensity stereo
cannam@154:  * @param tf_res Time-frequency resolution change
cannam@154:  * @param total_bits Total number of bits that can be used for the frame (including the ones already spent)
cannam@154:  * @param balance Number of unallocated bits
cannam@154:  * @param en Entropy coder state
cannam@154:  * @param LM log2() of the number of 2.5 subframes in the frame
cannam@154:  * @param codedBands Last band to receive bits + 1
cannam@154:  * @param seed Random generator seed
cannam@154:  * @param arch Run-time architecture (see opus_select_arch())
cannam@154:  */
cannam@154: void quant_all_bands(int encode, const CELTMode *m, int start, int end,
cannam@154:       celt_norm * X, celt_norm * Y, unsigned char *collapse_masks,
cannam@154:       const celt_ener *bandE, int *pulses, int shortBlocks, int spread,
cannam@154:       int dual_stereo, int intensity, int *tf_res, opus_int32 total_bits,
cannam@154:       opus_int32 balance, ec_ctx *ec, int M, int codedBands, opus_uint32 *seed,
cannam@154:       int complexity, int arch, int disable_inv);
cannam@154: 
cannam@154: void anti_collapse(const CELTMode *m, celt_norm *X_,
cannam@154:       unsigned char *collapse_masks, int LM, int C, int size, int start,
cannam@154:       int end, const opus_val16 *logE, const opus_val16 *prev1logE,
cannam@154:       const opus_val16 *prev2logE, const int *pulses, opus_uint32 seed,
cannam@154:       int arch);
cannam@154: 
cannam@154: opus_uint32 celt_lcg_rand(opus_uint32 seed);
cannam@154: 
cannam@154: int hysteresis_decision(opus_val16 val, const opus_val16 *thresholds, const opus_val16 *hysteresis, int N, int prev);
cannam@154: 
cannam@154: #endif /* BANDS_H */