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552 lines
20 KiB
552 lines
20 KiB
/* |
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* QCELP decoder |
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* Copyright (c) 2007 Reynaldo H. Verdejo Pinochet |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVCODEC_QCELPDATA_H |
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#define AVCODEC_QCELPDATA_H |
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/** |
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* @file |
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* Data tables for the QCELP decoder |
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* @author Reynaldo H. Verdejo Pinochet |
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* @remark FFmpeg merging spearheaded by Kenan Gillet |
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* @remark Development mentored by Benjamin Larson |
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*/ |
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#include <stddef.h> |
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#include <stdint.h> |
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#include "libavutil/common.h" |
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/** |
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* QCELP unpacked data frame |
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*/ |
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typedef struct QCELPFrame { |
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/// @name QCELP excitation codebook parameters |
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/// @{ |
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uint8_t cbsign[16]; ///< sign of the codebook gain for each codebook subframe |
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uint8_t cbgain[16]; ///< unsigned codebook gain for each codebook subframe |
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uint8_t cindex[16]; ///< codebook index for each codebook subframe |
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/// @} |
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/// @name QCELP pitch prediction parameters |
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/// @{ |
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uint8_t plag[4]; ///< pitch lag for each pitch subframe |
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uint8_t pfrac[4]; ///< fractional pitch lag for each pitch subframe |
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uint8_t pgain[4]; ///< pitch gain for each pitch subframe |
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/// @} |
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/** |
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* line spectral pair frequencies (LSP) for RATE_OCTAVE, |
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* line spectral pair frequencies grouped into five vectors |
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* of dimension two (LSPV) for other rates |
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*/ |
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uint8_t lspv[10]; |
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|
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/** |
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* reserved bits only present in bitrate 1, 1/4 and 1/8 packets |
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*/ |
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uint8_t reserved; |
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} QCELPFrame; |
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/** |
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* Pre-calculated table for hammsinc function. |
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* Only half of the table is needed because of symmetry. |
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* |
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* TIA/EIA/IS-733 2.4.5.2-2/3 |
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*/ |
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static const float qcelp_hammsinc_table[4] = { -0.006822, 0.041249, -0.143459, 0.588863}; |
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typedef struct QCELPBitmap { |
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uint8_t index; /**< index into the QCELPContext structure */ |
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uint8_t bitpos; /**< position of the lowest bit in the value's byte */ |
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uint8_t bitlen; /**< number of bits to read */ |
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} QCELPBitmap; |
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#define QCELP_OF(variable, bit, len) {offsetof(QCELPFrame, variable), bit, len} |
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/** |
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* Bitmap unpacking tables for RATE_FULL |
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* |
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* TIA/EIA/IS-733 Table 2.4.7.1-1 |
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*/ |
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static const QCELPBitmap qcelp_rate_full_bitmap[] = { |
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// start on bit |
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QCELP_OF(lspv [ 2], 0, 3), // 265 |
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QCELP_OF(lspv [ 1], 0, 7), // 262 |
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QCELP_OF(lspv [ 0], 0, 6), // 255 |
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QCELP_OF(lspv [ 4], 0, 6), // 249 |
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QCELP_OF(lspv [ 3], 0, 6), // 243 |
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QCELP_OF(lspv [ 2], 3, 4), // 237 |
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QCELP_OF(cbsign[ 0], 0, 1), // 233 |
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QCELP_OF(cbgain[ 0], 0, 4), // 232 |
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QCELP_OF(pfrac [ 0], 0, 1), // 228 |
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QCELP_OF(plag [ 0], 0, 7), // 227 |
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QCELP_OF(pgain [ 0], 0, 3), // 220 |
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QCELP_OF(cindex[ 1], 0, 4), // 217 |
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QCELP_OF(cbsign[ 1], 0, 1), // 213 |
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QCELP_OF(cbgain[ 1], 0, 4), // 212 |
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QCELP_OF(cindex[ 0], 0, 7), // 208 |
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QCELP_OF(cbgain[ 3], 0, 1), // 201 |
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QCELP_OF(cindex[ 2], 0, 7), // 200 |
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QCELP_OF(cbsign[ 2], 0, 1), // 193 |
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QCELP_OF(cbgain[ 2], 0, 4), // 192 |
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QCELP_OF(cindex[ 1], 4, 3), // 188 |
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QCELP_OF(plag [ 1], 0, 3), // 185 |
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QCELP_OF(pgain [ 1], 0, 3), // 182 |
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QCELP_OF(cindex[ 3], 0, 7), // 179 |
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QCELP_OF(cbsign[ 3], 0, 1), // 172 |
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QCELP_OF(cbgain[ 3], 1, 2), // 171 |
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QCELP_OF(cindex[ 4], 0, 6), // 169 |
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QCELP_OF(cbsign[ 4], 0, 1), // 163 |
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QCELP_OF(cbgain[ 4], 0, 4), // 162 |
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QCELP_OF(pfrac [ 1], 0, 1), // 158 |
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QCELP_OF(plag [ 1], 3, 4), // 157 |
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QCELP_OF(cbgain[ 6], 0, 3), // 153 |
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QCELP_OF(cindex[ 5], 0, 7), // 150 |
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QCELP_OF(cbsign[ 5], 0, 1), // 143 |
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QCELP_OF(cbgain[ 5], 0, 4), // 142 |
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QCELP_OF(cindex[ 4], 6, 1), // 138 |
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QCELP_OF(cindex[ 7], 0, 3), // 137 |
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QCELP_OF(cbsign[ 7], 0, 1), // 134 |
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QCELP_OF(cbgain[ 7], 0, 3), // 133 |
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QCELP_OF(cindex[ 6], 0, 7), // 130 |
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QCELP_OF(cbsign[ 6], 0, 1), // 123 |
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QCELP_OF(cbgain[ 6], 3, 1), // 122 |
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QCELP_OF(cbgain[ 8], 0, 1), // 121 |
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QCELP_OF(pfrac [ 2], 0, 1), // 120 |
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QCELP_OF(plag [ 2], 0, 7), // 119 |
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QCELP_OF(pgain [ 2], 0, 3), // 112 |
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QCELP_OF(cindex[ 7], 3, 4), // 109 |
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QCELP_OF(cbsign[ 9], 0, 1), // 105 |
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QCELP_OF(cbgain[ 9], 0, 4), // 104 |
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QCELP_OF(cindex[ 8], 0, 7), // 100 |
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QCELP_OF(cbsign[ 8], 0, 1), // 93 |
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QCELP_OF(cbgain[ 8], 1, 3), // 92 |
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QCELP_OF(cindex[10], 0, 4), // 89 |
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QCELP_OF(cbsign[10], 0, 1), // 85 |
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QCELP_OF(cbgain[10], 0, 4), // 84 |
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QCELP_OF(cindex[ 9], 0, 7), // 80 |
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QCELP_OF(pgain [ 3], 0, 2), // 73 |
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QCELP_OF(cindex[11], 0, 7), // 71 |
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QCELP_OF(cbsign[11], 0, 1), // 64 |
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QCELP_OF(cbgain[11], 0, 3), // 63 |
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QCELP_OF(cindex[10], 4, 3), // 60 |
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QCELP_OF(cindex[12], 0, 2), // 57 |
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QCELP_OF(cbsign[12], 0, 1), // 55 |
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QCELP_OF(cbgain[12], 0, 4), // 54 |
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QCELP_OF(pfrac [ 3], 0, 1), // 50 |
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QCELP_OF(plag [ 3], 0, 7), // 49 |
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QCELP_OF(pgain [ 3], 2, 1), // 42 |
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QCELP_OF(cindex[13], 0, 6), // 41 |
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QCELP_OF(cbsign[13], 0, 1), // 35 |
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QCELP_OF(cbgain[13], 0, 4), // 34 |
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QCELP_OF(cindex[12], 2, 5), // 30 |
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QCELP_OF(cbgain[15], 0, 3), // 25 |
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QCELP_OF(cindex[14], 0, 7), // 22 |
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QCELP_OF(cbsign[14], 0, 1), // 15 |
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QCELP_OF(cbgain[14], 0, 4), // 14 |
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QCELP_OF(cindex[13], 6, 1), // 10 |
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QCELP_OF(reserved, 0, 2), // 9 |
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QCELP_OF(cindex[15], 0, 7), // 7 |
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QCELP_OF(cbsign[15], 0, 1) // 0 |
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}; |
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/** |
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* Bitmap unpacking tables for RATE_HALF |
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* |
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* TIA/EIA/IS-733 Table 2.4.7.2-1 |
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*/ |
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static const QCELPBitmap qcelp_rate_half_bitmap[] = { |
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// start on bit |
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QCELP_OF(lspv [2], 0, 3), // 123 |
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QCELP_OF(lspv [1], 0, 7), // 120 |
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QCELP_OF(lspv [0], 0, 6), // 113 |
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QCELP_OF(lspv [4], 0, 6), // 107 |
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QCELP_OF(lspv [3], 0, 6), // 101 |
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QCELP_OF(lspv [2], 3, 4), // 95 |
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QCELP_OF(cbsign[0], 0, 1), // 91 |
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QCELP_OF(cbgain[0], 0, 4), // 90 |
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QCELP_OF(pfrac [0], 0, 1), // 86 |
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QCELP_OF(plag [0], 0, 7), // 85 |
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QCELP_OF(pgain [0], 0, 3), // 78 |
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QCELP_OF(plag [1], 0, 6), // 75 |
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QCELP_OF(pgain [1], 0, 3), // 69 |
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QCELP_OF(cindex[0], 0, 7), // 66 |
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QCELP_OF(pgain [2], 0, 2), // 59 |
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QCELP_OF(cindex[1], 0, 7), // 57 |
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QCELP_OF(cbsign[1], 0, 1), // 50 |
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QCELP_OF(cbgain[1], 0, 4), // 49 |
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QCELP_OF(pfrac [1], 0, 1), // 45 |
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QCELP_OF(plag [1], 6, 1), // 44 |
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QCELP_OF(cindex[2], 0, 2), // 43 |
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QCELP_OF(cbsign[2], 0, 1), // 41 |
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QCELP_OF(cbgain[2], 0, 4), // 40 |
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QCELP_OF(pfrac [2], 0, 1), // 36 |
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QCELP_OF(plag [2], 0, 7), // 35 |
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QCELP_OF(pgain [2], 2, 1), // 28 |
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QCELP_OF(pfrac [3], 0, 1), // 27 |
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QCELP_OF(plag [3], 0, 7), // 26 |
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QCELP_OF(pgain [3], 0, 3), // 19 |
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QCELP_OF(cindex[2], 2, 5), // 16 |
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QCELP_OF(cindex[3], 0, 7), // 11 |
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QCELP_OF(cbsign[3], 0, 1), // 4 |
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QCELP_OF(cbgain[3], 0, 4) // 3 |
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}; |
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/** |
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* Bitmap unpacking tables for RATE_QUARTER |
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* |
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* TIA/EIA/IS-733 Table 2.4.7.3-1 |
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*/ |
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static const QCELPBitmap qcelp_rate_quarter_bitmap[] = { |
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// start on bit |
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QCELP_OF(lspv [2], 0, 3), // 53 |
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QCELP_OF(lspv [1], 0, 7), // 50 |
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QCELP_OF(lspv [0], 0, 6), // 43 |
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QCELP_OF(lspv [4], 0, 6), // 37 |
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QCELP_OF(lspv [3], 0, 6), // 31 |
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QCELP_OF(lspv [2], 3, 4), // 25 |
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QCELP_OF(cbgain[3], 0, 4), // 21 |
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QCELP_OF(cbgain[2], 0, 4), // 17 |
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QCELP_OF(cbgain[1], 0, 4), // 13 |
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QCELP_OF(cbgain[0], 0, 4), // 9 |
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QCELP_OF(reserved, 0, 2), // 5 |
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QCELP_OF(cbgain[4], 0, 4) // 3 |
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}; |
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/** |
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* Bitmap unpacking tables for RATE_OCTAVE |
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* |
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* trick: CBSEED is written into QCELPContext.cbsign[15], |
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* which is not used for RATE_OCTAVE. |
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* CBSEED is only used to ensure the occurrence of random bit |
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* patterns in the 16 first bits that are used as the seed. |
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* |
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* TIA/EIA/IS-733 Table 2.4.7.4-1 |
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*/ |
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static const QCELPBitmap qcelp_rate_octave_bitmap[] = { |
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// start on bit |
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QCELP_OF(cbsign[15], 3, 1), // 19 |
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QCELP_OF(lspv [0], 0, 1), // 18 |
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QCELP_OF(lspv [1], 0, 1), // 17 |
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QCELP_OF(lspv [2], 0, 1), // 16 |
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QCELP_OF(cbsign[15], 2, 1), // 15 |
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QCELP_OF(lspv [3], 0, 1), // 14 |
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QCELP_OF(lspv [4], 0, 1), // 13 |
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QCELP_OF(lspv [5], 0, 1), // 12 |
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QCELP_OF(cbsign[15], 1, 1), // 11 |
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QCELP_OF(lspv [6], 0, 1), // 10 |
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QCELP_OF(lspv [7], 0, 1), // 9 |
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QCELP_OF(lspv [8], 0, 1), // 8 |
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QCELP_OF(cbsign[15], 0, 1), // 7 |
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QCELP_OF(lspv [9], 0, 1), // 6 |
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QCELP_OF(cbgain [0], 0, 2), // 5 |
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QCELP_OF(reserved, 0, 4) // 3 |
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}; |
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/** |
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* Bitmapping data position for each packet type in |
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* the QCELPContext |
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*/ |
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static const QCELPBitmap * const qcelp_unpacking_bitmaps_per_rate[5] = { |
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NULL, ///< for SILENCE rate |
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qcelp_rate_octave_bitmap, |
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qcelp_rate_quarter_bitmap, |
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qcelp_rate_half_bitmap, |
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qcelp_rate_full_bitmap, |
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}; |
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static const uint16_t qcelp_unpacking_bitmaps_lengths[5] = { |
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0, ///< for SILENCE rate |
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FF_ARRAY_ELEMS(qcelp_rate_octave_bitmap), |
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FF_ARRAY_ELEMS(qcelp_rate_quarter_bitmap), |
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FF_ARRAY_ELEMS(qcelp_rate_half_bitmap), |
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FF_ARRAY_ELEMS(qcelp_rate_full_bitmap), |
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}; |
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typedef uint16_t qcelp_vector[2]; |
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/** |
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* LSP vector quantization tables in x*10000 form |
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* |
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* TIA/EIA/IS-733 tables 2.4.3.2.6.3-1 through 2.4.3.2.6.3-5 |
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*/ |
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static const qcelp_vector qcelp_lspvq1[64]= { |
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{ 327, 118},{ 919, 111},{ 427, 440},{1327, 185}, |
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{ 469, 50},{1272, 91},{ 892, 59},{1771, 193}, |
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{ 222, 158},{1100, 127},{ 827, 55},{ 978, 791}, |
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{ 665, 47},{ 700,1401},{ 670, 859},{1913,1048}, |
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{ 471, 215},{1046, 125},{ 645, 298},{1599, 160}, |
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{ 593, 39},{1187, 462},{ 749, 341},{1520, 511}, |
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{ 290, 792},{ 909, 362},{ 753, 81},{1111,1058}, |
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{ 519, 253},{ 828, 839},{ 685, 541},{1421,1258}, |
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{ 386, 130},{ 962, 119},{ 542, 387},{1431, 185}, |
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{ 526, 51},{1175, 260},{ 831, 167},{1728, 510}, |
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{ 273, 437},{1172, 113},{ 771, 144},{1122, 751}, |
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{ 619, 119},{ 492,1276},{ 658, 695},{1882, 615}, |
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{ 415, 200},{1018, 88},{ 681, 339},{1436, 325}, |
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{ 555, 122},{1042, 485},{ 826, 345},{1374, 743}, |
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{ 383,1018},{1005, 358},{ 704, 86},{1301, 586}, |
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{ 597, 241},{ 832, 621},{ 555, 573},{1504, 839}}; |
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static const qcelp_vector qcelp_lspvq2[128]= { |
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{ 255, 293},{ 904, 219},{ 151,1211},{1447, 498}, |
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{ 470, 253},{1559, 177},{1547, 994},{2394, 242}, |
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{ 91, 813},{ 857, 590},{ 934,1326},{1889, 282}, |
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{ 813, 472},{1057,1494},{ 450,3315},{2163,1895}, |
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{ 538, 532},{1399, 218},{ 146,1552},{1755, 626}, |
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{ 822, 202},{1299, 663},{ 706,1732},{2656, 401}, |
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{ 418, 745},{ 762,1038},{ 583,1748},{1746,1285}, |
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{ 527,1169},{1314, 830},{ 556,2116},{1073,2321}, |
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{ 297, 570},{ 981, 403},{ 468,1103},{1740, 243}, |
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{ 725, 179},{1255, 474},{1374,1362},{1922, 912}, |
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{ 285, 947},{ 930, 700},{ 593,1372},{1909, 576}, |
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{ 588, 916},{1110,1116},{ 224,2719},{1633,2220}, |
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{ 402, 520},{1061, 448},{ 402,1352},{1499, 775}, |
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{ 664, 589},{1081, 727},{ 801,2206},{2165,1157}, |
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{ 566, 802},{ 911,1116},{ 306,1703},{1792, 836}, |
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{ 655, 999},{1061,1038},{ 298,2089},{1110,1753}, |
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{ 361, 311},{ 970, 239},{ 265,1231},{1495, 573}, |
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{ 566, 262},{1569, 293},{1341,1144},{2271, 544}, |
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{ 214, 877},{ 847, 719},{ 794,1384},{2067, 274}, |
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{ 703, 688},{1099,1306},{ 391,2947},{2024,1670}, |
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{ 471, 525},{1245, 290},{ 264,1557},{1568, 807}, |
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{ 718, 399},{1193, 685},{ 883,1594},{2729, 764}, |
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{ 500, 754},{ 809,1108},{ 541,1648},{1523,1385}, |
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{ 614,1196},{1209, 847},{ 345,2242},{1442,1747}, |
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{ 199, 560},{1092, 194},{ 349,1253},{1653, 507}, |
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{ 625, 354},{1376, 431},{1187,1465},{2164, 872}, |
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{ 360, 974},{1008, 698},{ 704,1346},{2114, 452}, |
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{ 720, 816},{1240,1089},{ 439,2475},{1498,2040}, |
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{ 336, 718},{1213, 187},{ 451,1450},{1368, 885}, |
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{ 592, 578},{1131, 531},{ 861,1855},{1764,1500}, |
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{ 444, 970},{ 935, 903},{ 424,1687},{1633,1102}, |
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{ 793, 897},{1060, 897},{ 185,2011},{1205,1855}}; |
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static const qcelp_vector qcelp_lspvq3[128]= { |
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{ 225, 283},{1296, 355},{ 543, 343},{2073, 274}, |
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{ 204,1099},{1562, 523},{1388, 161},{2784, 274}, |
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{ 112, 849},{1870, 175},{1189, 160},{1490,1088}, |
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{ 969,1115},{ 659,3322},{1158,1073},{3183,1363}, |
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{ 517, 223},{1740, 223},{ 704, 387},{2637, 234}, |
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{ 692,1005},{1287,1610},{ 952, 532},{2393, 646}, |
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{ 490, 552},{1619, 657},{ 845, 670},{1784,2280}, |
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{ 191,1775},{ 272,2868},{ 942, 952},{2628,1479}, |
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{ 278, 579},{1565, 218},{ 814, 180},{2379, 187}, |
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{ 276,1444},{1199,1223},{1200, 349},{3009, 307}, |
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{ 312, 844},{1898, 306},{ 863, 470},{1685,1241}, |
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{ 513,1727},{ 711,2233},{1085, 864},{3398, 527}, |
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{ 414, 440},{1356, 612},{ 964, 147},{2173, 738}, |
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{ 465,1292},{ 877,1749},{1104, 689},{2105,1311}, |
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{ 580, 864},{1895, 752},{ 652, 609},{1485,1699}, |
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{ 514,1400},{ 386,2131},{ 933, 798},{2473, 986}, |
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{ 334, 360},{1375, 398},{ 621, 276},{2183, 280}, |
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{ 311,1114},{1382, 807},{1284, 175},{2605, 636}, |
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{ 230, 816},{1739, 408},{1074, 176},{1619,1120}, |
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{ 784,1371},{ 448,3050},{1189, 880},{3039,1165}, |
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{ 424, 241},{1672, 186},{ 815, 333},{2432, 324}, |
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{ 584,1029},{1137,1546},{1015, 585},{2198, 995}, |
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{ 574, 581},{1746, 647},{ 733, 740},{1938,1737}, |
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{ 347,1710},{ 373,2429},{ 787,1061},{2439,1438}, |
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{ 185, 536},{1489, 178},{ 703, 216},{2178, 487}, |
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{ 154,1421},{1414, 994},{1103, 352},{3072, 473}, |
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{ 408, 819},{2055, 168},{ 998, 354},{1917,1140}, |
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{ 665,1799},{ 993,2213},{1234, 631},{3003, 762}, |
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{ 373, 620},{1518, 425},{ 913, 300},{1966, 836}, |
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{ 402,1185},{ 948,1385},{1121, 555},{1802,1509}, |
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{ 474, 886},{1888, 610},{ 739, 585},{1231,2379}, |
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{ 661,1335},{ 205,2211},{ 823, 822},{2480,1179}}; |
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|
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static const qcelp_vector qcelp_lspvq4[64]= { |
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{ 348, 311},{ 812,1145},{ 552, 461},{1826, 263}, |
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{ 601, 675},{1730, 172},{1523, 193},{2449, 277}, |
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{ 334, 668},{ 805,1441},{1319, 207},{1684, 910}, |
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{ 582,1318},{1403,1098},{ 979, 832},{2700,1359}, |
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{ 624, 228},{1292, 979},{ 800, 195},{2226, 285}, |
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{ 730, 862},{1537, 601},{1115, 509},{2720, 354}, |
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{ 218,1167},{1212,1538},{1074, 247},{1674,1710}, |
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{ 322,2142},{1263, 777},{ 981, 556},{2119,1710}, |
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{ 193, 596},{1035, 957},{ 694, 397},{1997, 253}, |
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{ 743, 603},{1584, 321},{1346, 346},{2221, 708}, |
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{ 451, 732},{1040,1415},{1184, 230},{1853, 919}, |
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{ 310,1661},{1625, 706},{ 856, 843},{2902, 702}, |
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{ 467, 348},{1108,1048},{ 859, 306},{1964, 463}, |
|
{ 560,1013},{1425, 533},{1142, 634},{2391, 879}, |
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{ 397,1084},{1345,1700},{ 976, 248},{1887,1189}, |
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{ 644,2087},{1262, 603},{ 877, 550},{2203,1307}}; |
|
|
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static const qcelp_vector qcelp_lspvq5[64]= { |
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{ 360, 222},{ 820,1097},{ 601, 319},{1656, 198}, |
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{ 604, 513},{1552, 141},{1391, 155},{2474, 261}, |
|
{ 269, 785},{1463, 646},{1123, 191},{2015, 223}, |
|
{ 785, 844},{1202,1011},{ 980, 807},{3014, 793}, |
|
{ 570, 180},{1135,1382},{ 778, 256},{1901, 179}, |
|
{ 807, 622},{1461, 458},{1231, 178},{2028, 821}, |
|
{ 387, 927},{1496,1004},{ 888, 392},{2246, 341}, |
|
{ 295,1462},{1156, 694},{1022, 473},{2226,1364}, |
|
{ 210, 478},{1029,1020},{ 722, 181},{1730, 251}, |
|
{ 730, 488},{1465, 293},{1303, 326},{2595, 387}, |
|
{ 458, 584},{1569, 742},{1029, 173},{1910, 495}, |
|
{ 605,1159},{1268, 719},{ 973, 646},{2872, 428}, |
|
{ 443, 334},{ 835,1465},{ 912, 138},{1716, 442}, |
|
{ 620, 778},{1316, 450},{1186, 335},{1446,1665}, |
|
{ 486,1050},{1675,1019},{ 880, 278},{2214, 202}, |
|
{ 539,1564},{1142, 533},{ 984, 391},{2130,1089}}; |
|
|
|
static const qcelp_vector * const qcelp_lspvq[5] = { |
|
qcelp_lspvq1, |
|
qcelp_lspvq2, |
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qcelp_lspvq3, |
|
qcelp_lspvq4, |
|
qcelp_lspvq5 |
|
}; |
|
|
|
/** |
|
* The final gain scalefactor before clipping into a usable output float |
|
*/ |
|
#define QCELP_SCALE 8192. |
|
|
|
/** |
|
* Table for computing Ga (decoded linear codebook gain magnitude) |
|
* |
|
* @note The table could fit in int16_t in x*8 form, but it seems |
|
* to be slower on x86 |
|
* |
|
* TIA/EIA/IS-733 2.4.6.2.1-3 |
|
*/ |
|
|
|
static const float qcelp_g12ga[61] = { |
|
1.000/QCELP_SCALE, 1.125/QCELP_SCALE, 1.250/QCELP_SCALE, 1.375/QCELP_SCALE, |
|
1.625/QCELP_SCALE, 1.750/QCELP_SCALE, 2.000/QCELP_SCALE, 2.250/QCELP_SCALE, |
|
2.500/QCELP_SCALE, 2.875/QCELP_SCALE, 3.125/QCELP_SCALE, 3.500/QCELP_SCALE, |
|
4.000/QCELP_SCALE, 4.500/QCELP_SCALE, 5.000/QCELP_SCALE, 5.625/QCELP_SCALE, |
|
6.250/QCELP_SCALE, 7.125/QCELP_SCALE, 8.000/QCELP_SCALE, 8.875/QCELP_SCALE, |
|
10.000/QCELP_SCALE, 11.250/QCELP_SCALE, 12.625/QCELP_SCALE, 14.125/QCELP_SCALE, |
|
15.875/QCELP_SCALE, 17.750/QCELP_SCALE, 20.000/QCELP_SCALE, 22.375/QCELP_SCALE, |
|
25.125/QCELP_SCALE, 28.125/QCELP_SCALE, 31.625/QCELP_SCALE, 35.500/QCELP_SCALE, |
|
39.750/QCELP_SCALE, 44.625/QCELP_SCALE, 50.125/QCELP_SCALE, 56.250/QCELP_SCALE, |
|
63.125/QCELP_SCALE, 70.750/QCELP_SCALE, 79.375/QCELP_SCALE, 89.125/QCELP_SCALE, |
|
100.000/QCELP_SCALE, 112.250/QCELP_SCALE, 125.875/QCELP_SCALE, 141.250/QCELP_SCALE, |
|
158.500/QCELP_SCALE, 177.875/QCELP_SCALE, 199.500/QCELP_SCALE, 223.875/QCELP_SCALE, |
|
251.250/QCELP_SCALE, 281.875/QCELP_SCALE, 316.250/QCELP_SCALE, 354.875/QCELP_SCALE, |
|
398.125/QCELP_SCALE, 446.625/QCELP_SCALE, 501.125/QCELP_SCALE, 562.375/QCELP_SCALE, |
|
631.000/QCELP_SCALE, 708.000/QCELP_SCALE, 794.375/QCELP_SCALE, 891.250/QCELP_SCALE, |
|
1000.000/QCELP_SCALE}; |
|
|
|
/** |
|
* Circular codebook for rate 1 frames in x*100 form |
|
* |
|
* TIA/EIA/IS-733 2.4.6.1-2 |
|
*/ |
|
static const int16_t qcelp_rate_full_codebook[128] = { |
|
10, -65, -59, 12, 110, 34, -134, 157, |
|
104, -84, -34, -115, 23, -101, 3, 45, |
|
-101, -16, -59, 28, -45, 134, -67, 22, |
|
61, -29, 226, -26, -55, -179, 157, -51, |
|
-220, -93, -37, 60, 118, 74, -48, -95, |
|
-181, 111, 36, -52, -215, 78, -112, 39, |
|
-17, -47, -223, 19, 12, -98, -142, 130, |
|
54, -127, 21, -12, 39, -48, 12, 128, |
|
6, -167, 82, -102, -79, 55, -44, 48, |
|
-20, -53, 8, -61, 11, -70, -157, -168, |
|
20, -56, -74, 78, 33, -63, -173, -2, |
|
-75, -53, -146, 77, 66, -29, 9, -75, |
|
65, 119, -43, 76, 233, 98, 125, -156, |
|
-27, 78, -9, 170, 176, 143, -148, -7, |
|
27, -136, 5, 27, 18, 139, 204, 7, |
|
-184, -197, 52, -3, 78, -189, 8, -65 |
|
}; |
|
#define QCELP_RATE_FULL_CODEBOOK_RATIO .01 |
|
|
|
/** |
|
* Circular codebook for rate 1/2 frames in x*2 form |
|
* |
|
* TIA/EIA/IS-733 2.4.6.1-1 |
|
*/ |
|
static const int8_t qcelp_rate_half_codebook[128] = { |
|
0, -4, 0, -3, 0, 0, 0, 0, |
|
0, 0, 0, 0, 0, 0, 0, 0, |
|
0, -3, -2, 0, 0, 0, 0, 0, |
|
0, 0, 0, 0, 0, 0, 0, 5, |
|
0, 0, 0, 0, 0, 0, 4, 0, |
|
0, 3, 2, 0, 3, 4, 0, 0, |
|
0, 0, 0, 0, 0, 0, 0, 0, |
|
0, 0, 0, 0, 0, 3, 0, 0, |
|
-3, 3, 0, 0, -2, 0, 3, 0, |
|
0, 0, 0, 0, 0, 0, -5, 0, |
|
0, 0, 0, 3, 0, 0, 0, 3, |
|
0, 0, 0, 0, 0, 0, 0, 4, |
|
0, 0, 0, 0, 0, 0, 0, 0, |
|
0, 3, 6, -3, -4, 0, -3, -3, |
|
3, -3, 0, 0, 0, 0, 0, 0, |
|
0, 0, 0, 0, 0, 0, 0, 0 |
|
}; |
|
#define QCELP_RATE_HALF_CODEBOOK_RATIO 0.5 |
|
|
|
/** |
|
* sqrt(1.887) is the maximum of the pseudorandom |
|
* white sequence used to generate the scaled codebook |
|
* vector for bitrate 1/4. |
|
* |
|
* TIA/EIA/IS-733 2.4.8.1.2 |
|
*/ |
|
#define QCELP_SQRT1887 1.373681186 |
|
|
|
/** |
|
* Table for impulse response of BPF used to filter |
|
* the white excitation for bitrate 1/4 synthesis |
|
* |
|
* Only half the tables are needed because of symmetry. |
|
* |
|
* TIA/EIA/IS-733 2.4.8.1.2-1.1 |
|
*/ |
|
static const double qcelp_rnd_fir_coefs[11] = { |
|
-1.344519e-1, 1.735384e-2, -6.905826e-2, 2.434368e-2, |
|
-8.210701e-2, 3.041388e-2, -9.251384e-2, 3.501983e-2, |
|
-9.918777e-2, 3.749518e-2, 8.985137e-1 |
|
}; |
|
|
|
/** |
|
* This spread factor is used, for bitrate 1/8 and I_F_Q, |
|
* to force LSP frequencies to be at least 80 Hz apart. |
|
* |
|
* TIA/EIA/IS-733 2.4.3.3.2 |
|
*/ |
|
#define QCELP_LSP_SPREAD_FACTOR 0.02 |
|
|
|
/** |
|
* Predictor coefficient for the conversion of LSP codes |
|
* to LSP frequencies for 1/8 and I_F_Q |
|
* |
|
* TIA/EIA/IS-733 2.4.3.2.7-2 |
|
*/ |
|
#define QCELP_LSP_OCTAVE_PREDICTOR 29.0/32 |
|
|
|
/** |
|
* Initial coefficient to perform bandwidth expansion on LPC |
|
* |
|
* @note: 0.9883 looks like an approximation of 253/256. |
|
* |
|
* TIA/EIA/IS-733 2.4.3.3.6 6 |
|
*/ |
|
#define QCELP_BANDWIDTH_EXPANSION_COEFF 0.9883 |
|
|
|
#endif /* AVCODEC_QCELPDATA_H */
|
|
|