1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libopus/celt/bands.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,114 @@
1.4 +/* Copyright (c) 2007-2008 CSIRO
1.5 + Copyright (c) 2007-2009 Xiph.Org Foundation
1.6 + Copyright (c) 2008-2009 Gregory Maxwell
1.7 + Written by Jean-Marc Valin and Gregory Maxwell */
1.8 +/*
1.9 + Redistribution and use in source and binary forms, with or without
1.10 + modification, are permitted provided that the following conditions
1.11 + are met:
1.12 +
1.13 + - Redistributions of source code must retain the above copyright
1.14 + notice, this list of conditions and the following disclaimer.
1.15 +
1.16 + - Redistributions in binary form must reproduce the above copyright
1.17 + notice, this list of conditions and the following disclaimer in the
1.18 + documentation and/or other materials provided with the distribution.
1.19 +
1.20 + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.21 + ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.22 + LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
1.23 + A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
1.24 + OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.25 + EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.26 + PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.27 + PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.28 + LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.29 + NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.30 + SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.31 +*/
1.32 +
1.33 +#ifndef BANDS_H
1.34 +#define BANDS_H
1.35 +
1.36 +#include "arch.h"
1.37 +#include "modes.h"
1.38 +#include "entenc.h"
1.39 +#include "entdec.h"
1.40 +#include "rate.h"
1.41 +
1.42 +/** Compute the amplitude (sqrt energy) in each of the bands
1.43 + * @param m Mode data
1.44 + * @param X Spectrum
1.45 + * @param bandE Square root of the energy for each band (returned)
1.46 + */
1.47 +void compute_band_energies(const CELTMode *m, const celt_sig *X, celt_ener *bandE, int end, int C, int M);
1.48 +
1.49 +/*void compute_noise_energies(const CELTMode *m, const celt_sig *X, const opus_val16 *tonality, celt_ener *bandE);*/
1.50 +
1.51 +/** Normalise each band of X such that the energy in each band is
1.52 + equal to 1
1.53 + * @param m Mode data
1.54 + * @param X Spectrum (returned normalised)
1.55 + * @param bandE Square root of the energy for each band
1.56 + */
1.57 +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);
1.58 +
1.59 +/** Denormalise each band of X to restore full amplitude
1.60 + * @param m Mode data
1.61 + * @param X Spectrum (returned de-normalised)
1.62 + * @param bandE Square root of the energy for each band
1.63 + */
1.64 +void denormalise_bands(const CELTMode *m, const celt_norm * OPUS_RESTRICT X,
1.65 + celt_sig * OPUS_RESTRICT freq, const opus_val16 *bandE, int start, int end, int C, int M);
1.66 +
1.67 +#define SPREAD_NONE (0)
1.68 +#define SPREAD_LIGHT (1)
1.69 +#define SPREAD_NORMAL (2)
1.70 +#define SPREAD_AGGRESSIVE (3)
1.71 +
1.72 +int spreading_decision(const CELTMode *m, celt_norm *X, int *average,
1.73 + int last_decision, int *hf_average, int *tapset_decision, int update_hf,
1.74 + int end, int C, int M);
1.75 +
1.76 +#ifdef MEASURE_NORM_MSE
1.77 +void measure_norm_mse(const CELTMode *m, float *X, float *X0, float *bandE, float *bandE0, int M, int N, int C);
1.78 +#endif
1.79 +
1.80 +void haar1(celt_norm *X, int N0, int stride);
1.81 +
1.82 +/** Quantisation/encoding of the residual spectrum
1.83 + * @param encode flag that indicates whether we're encoding (1) or decoding (0)
1.84 + * @param m Mode data
1.85 + * @param start First band to process
1.86 + * @param end Last band to process + 1
1.87 + * @param X Residual (normalised)
1.88 + * @param Y Residual (normalised) for second channel (or NULL for mono)
1.89 + * @param collapse_masks Anti-collapse tracking mask
1.90 + * @param bandE Square root of the energy for each band
1.91 + * @param pulses Bit allocation (per band) for PVQ
1.92 + * @param shortBlocks Zero for long blocks, non-zero for short blocks
1.93 + * @param spread Amount of spreading to use
1.94 + * @param dual_stereo Zero for MS stereo, non-zero for dual stereo
1.95 + * @param intensity First band to use intensity stereo
1.96 + * @param tf_res Time-frequency resolution change
1.97 + * @param total_bits Total number of bits that can be used for the frame (including the ones already spent)
1.98 + * @param balance Number of unallocated bits
1.99 + * @param en Entropy coder state
1.100 + * @param LM log2() of the number of 2.5 subframes in the frame
1.101 + * @param codedBands Last band to receive bits + 1
1.102 + * @param seed Random generator seed
1.103 + */
1.104 +void quant_all_bands(int encode, const CELTMode *m, int start, int end,
1.105 + celt_norm * X, celt_norm * Y, unsigned char *collapse_masks, const celt_ener *bandE, int *pulses,
1.106 + int shortBlocks, int spread, int dual_stereo, int intensity, int *tf_res,
1.107 + opus_int32 total_bits, opus_int32 balance, ec_ctx *ec, int M, int codedBands, opus_uint32 *seed);
1.108 +
1.109 +void anti_collapse(const CELTMode *m, celt_norm *X_, unsigned char *collapse_masks, int LM, int C, int size,
1.110 + int start, int end, opus_val16 *logE, opus_val16 *prev1logE,
1.111 + opus_val16 *prev2logE, int *pulses, opus_uint32 seed);
1.112 +
1.113 +opus_uint32 celt_lcg_rand(opus_uint32 seed);
1.114 +
1.115 +int hysteresis_decision(opus_val16 val, const opus_val16 *thresholds, const opus_val16 *hysteresis, int N, int prev);
1.116 +
1.117 +#endif /* BANDS_H */
