1/* Copyright (c) 2007-2008 CSIRO
2   Copyright (c) 2007-2009 Xiph.Org Foundation
3   Copyright (c) 2008-2009 Gregory Maxwell
4   Written by Jean-Marc Valin and Gregory Maxwell */
5/*
6   Redistribution and use in source and binary forms, with or without
7   modification, are permitted provided that the following conditions
8   are met:
9
10   - Redistributions of source code must retain the above copyright
11   notice, this list of conditions and the following disclaimer.
12
13   - Redistributions in binary form must reproduce the above copyright
14   notice, this list of conditions and the following disclaimer in the
15   documentation and/or other materials provided with the distribution.
16
17   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
21   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
26   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28*/
29
30#ifndef BANDS_H
31#define BANDS_H
32
33#include "arch.h"
34#include "modes.h"
35#include "entenc.h"
36#include "entdec.h"
37#include "rate.h"
38
39/** Compute the amplitude (sqrt energy) in each of the bands
40 * @param m Mode data
41 * @param X Spectrum
42 * @param bandE Square root of the energy for each band (returned)
43 */
44void compute_band_energies(const CELTMode *m, const celt_sig *X, celt_ener *bandE, int end, int C, int M);
45
46/*void compute_noise_energies(const CELTMode *m, const celt_sig *X, const opus_val16 *tonality, celt_ener *bandE);*/
47
48/** Normalise each band of X such that the energy in each band is
49    equal to 1
50 * @param m Mode data
51 * @param X Spectrum (returned normalised)
52 * @param bandE Square root of the energy for each band
53 */
54void 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);
55
56/** Denormalise each band of X to restore full amplitude
57 * @param m Mode data
58 * @param X Spectrum (returned de-normalised)
59 * @param bandE Square root of the energy for each band
60 */
61void denormalise_bands(const CELTMode *m, const celt_norm * OPUS_RESTRICT X,
62      celt_sig * OPUS_RESTRICT freq, const opus_val16 *bandE, int start, int end, int C, int M);
63
64#define SPREAD_NONE       (0)
65#define SPREAD_LIGHT      (1)
66#define SPREAD_NORMAL     (2)
67#define SPREAD_AGGRESSIVE (3)
68
69int spreading_decision(const CELTMode *m, celt_norm *X, int *average,
70      int last_decision, int *hf_average, int *tapset_decision, int update_hf,
71      int end, int C, int M);
72
73#ifdef MEASURE_NORM_MSE
74void measure_norm_mse(const CELTMode *m, float *X, float *X0, float *bandE, float *bandE0, int M, int N, int C);
75#endif
76
77void haar1(celt_norm *X, int N0, int stride);
78
79/** Quantisation/encoding of the residual spectrum
80 * @param encode flag that indicates whether we're encoding (1) or decoding (0)
81 * @param m Mode data
82 * @param start First band to process
83 * @param end Last band to process + 1
84 * @param X Residual (normalised)
85 * @param Y Residual (normalised) for second channel (or NULL for mono)
86 * @param collapse_masks Anti-collapse tracking mask
87 * @param bandE Square root of the energy for each band
88 * @param pulses Bit allocation (per band) for PVQ
89 * @param shortBlocks Zero for long blocks, non-zero for short blocks
90 * @param spread Amount of spreading to use
91 * @param dual_stereo Zero for MS stereo, non-zero for dual stereo
92 * @param intensity First band to use intensity stereo
93 * @param tf_res Time-frequency resolution change
94 * @param total_bits Total number of bits that can be used for the frame (including the ones already spent)
95 * @param balance Number of unallocated bits
96 * @param en Entropy coder state
97 * @param LM log2() of the number of 2.5 subframes in the frame
98 * @param codedBands Last band to receive bits + 1
99 * @param seed Random generator seed
100 */
101void quant_all_bands(int encode, const CELTMode *m, int start, int end,
102      celt_norm * X, celt_norm * Y, unsigned char *collapse_masks, const celt_ener *bandE, int *pulses,
103      int shortBlocks, int spread, int dual_stereo, int intensity, int *tf_res,
104      opus_int32 total_bits, opus_int32 balance, ec_ctx *ec, int M, int codedBands, opus_uint32 *seed);
105
106void anti_collapse(const CELTMode *m, celt_norm *X_, unsigned char *collapse_masks, int LM, int C, int size,
107      int start, int end, opus_val16 *logE, opus_val16 *prev1logE,
108      opus_val16 *prev2logE, int *pulses, opus_uint32 seed);
109
110opus_uint32 celt_lcg_rand(opus_uint32 seed);
111
112int hysteresis_decision(opus_val16 val, const opus_val16 *thresholds, const opus_val16 *hysteresis, int N, int prev);
113
114#endif /* BANDS_H */
115