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 */ 44 void 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 */ 54 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); 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 */ 61 void 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 69 int 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 74 void measure_norm_mse(const CELTMode *m, float *X, float *X0, float *bandE, float *bandE0, int M, int N, int C); 75 #endif 76 77 void 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 */ 101 void 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); 105 106 void 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); 109 110 opus_uint32 celt_lcg_rand(opus_uint32 seed); 111 112 int hysteresis_decision(opus_val16 val, const opus_val16 *thresholds, const opus_val16 *hysteresis, int N, int prev); 113 114 #endif /* BANDS_H */ 115
