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200e8e80aa
The IMC decoder uses Huffman tables which are created at runtime from length tables of type uint8_t and code tables of type uint16_t together with an implicit symbols table (i.e. symbol[i] == i). This commit changes this: All three tables are subjected to the same permutation to order the codes from left to right in the tree; afterwards the codes can be omitted because they are easily computable at runtime from the lengths, whereas the symbols need to be explicitly coded now. But said symbols fit into an uint8_t, so one saves space. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
170 lines
8.2 KiB
C
170 lines
8.2 KiB
C
/*
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* IMC compatible decoder
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* Copyright (c) 2002-2004 Maxim Poliakovski
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* Copyright (c) 2006 Benjamin Larsson
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* Copyright (c) 2006 Konstantin Shishkov
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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_IMCDATA_H
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#define AVCODEC_IMCDATA_H
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#include <stdint.h>
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static const uint16_t band_tab[33] = {
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0, 3, 6, 9, 12, 16, 20, 24, 29, 34, 40,
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46, 53, 60, 68, 76, 84, 93, 102, 111, 121, 131,
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141, 151, 162, 173, 184, 195, 207, 219, 231, 243, 256,
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};
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static const int8_t cyclTab[32] = {
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
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12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23,
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24, 25, 26, 27, 28, 29, 30, 31, 32, 32,
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};
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static const int8_t cyclTab2[32] = {
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-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
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12, 13, 14, 15, 16, 17, 17, 18, 19, 20, 21, 22,
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23, 24, 25, 26, 27, 28, 29};
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static const float imc_weights1[31] = {
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0.119595, 0.123124, 0.129192, 9.97377e-2, 8.1923e-2, 9.61153e-2, 8.77885e-2, 8.61174e-2,
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9.00882e-2, 9.91658e-2, 0.112991, 0.131126, 0.152886, 0.177292, 0.221782, 0.244917, 0.267386,
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0.306816, 0.323046, 0.33729, 0.366773, 0.392557, 0.398076, 0.403302, 0.42451, 0.444777,
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0.449188, 0.455445, 0.477853, 0.500669, 0.510395};
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static const float imc_weights2[31] = {
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3.23466e-3, 3.49886e-3, 3.98413e-3, 1.98116e-3, 1.16465e-3, 1.79283e-3, 1.40372e-3, 1.33274e-3,
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1.50523e-3, 1.95064e-3, 2.77472e-3, 4.14725e-3, 6.2776e-3, 9.36401e-3, 1.71397e-2, 2.24052e-2,
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2.83971e-2, 4.11689e-2, 4.73165e-2, 5.31631e-2, 6.66614e-2, 8.00824e-2, 8.31588e-2, 8.61397e-2,
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9.89229e-2, 0.112197, 0.115227, 0.119613, 0.136174, 0.15445, 0.162685};
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static const float imc_quantizer1[4][8] = {
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{ 8.4431201e-1, 4.7358301e-1, 1.448354, 2.7073899e-1, 7.4449003e-1, 1.241991, 1.845484, 0.0},
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{ 8.6876702e-1, 4.7659001e-1, 1.478224, 2.5672799e-1, 7.55777e-1, 1.3229851, 2.03438, 0.0},
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{ 7.5891501e-1, 6.2272799e-1, 1.271322, 3.47904e-1, 7.5317699e-1, 1.150767, 1.628476, 0.0},
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{ 7.65257e-1, 6.44647e-1, 1.263824, 3.4548101e-1, 7.6384902e-1, 1.214466, 1.7638789, 0.0},
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};
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static const float imc_quantizer2[2][56] = {
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{ 1.39236e-1, 3.50548e-1, 5.9547901e-1, 8.5772401e-1, 1.121545, 1.3882281, 1.695882, 2.1270809,
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7.2221003e-2, 1.85177e-1, 2.9521701e-1, 4.12568e-1, 5.4068601e-1, 6.7679501e-1, 8.1196898e-1, 9.4765198e-1,
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1.0779999, 1.203415, 1.337265, 1.481871, 1.639982, 1.814766, 2.0701399, 2.449862,
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3.7533998e-2, 1.02722e-1, 1.6021401e-1, 2.16043e-1, 2.7231601e-1, 3.3025399e-1, 3.9022601e-1, 4.52849e-1,
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5.1794899e-1, 5.8529502e-1, 6.53956e-1, 7.2312802e-1, 7.9150802e-1, 8.5891002e-1, 9.28141e-1, 9.9706203e-1,
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1.062153, 1.12564, 1.189834, 1.256122, 1.324469, 1.3955311, 1.468906, 1.545084,
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1.6264729, 1.711524, 1.802705, 1.91023, 2.0533991, 2.22333, 2.4830019, 3.253329 },
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{ 1.11654e-1, 3.54469e-1, 6.4232099e-1, 9.6128798e-1, 1.295053, 1.61777, 1.989839, 2.51107,
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5.7721999e-2, 1.69879e-1, 2.97589e-1, 4.3858799e-1, 5.9039903e-1, 7.4934798e-1, 9.1628098e-1, 1.087297,
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1.262751, 1.4288321, 1.6040879, 1.79067, 2.000668, 2.2394669, 2.649332, 5.2760072,
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2.9722e-2, 8.7316997e-2, 1.4445201e-1, 2.04247e-1, 2.6879501e-1, 3.3716801e-1, 4.08811e-1, 4.8306999e-1,
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5.6049401e-1, 6.3955498e-1, 7.2044599e-1, 8.0427998e-1, 8.8933599e-1, 9.7537601e-1, 1.062461, 1.1510431,
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1.240236, 1.326715, 1.412513, 1.500502, 1.591749, 1.686413, 1.785239, 1.891233,
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2.0051291, 2.127681, 2.2709141, 2.475826, 2.7219379, 3.101985, 4.686213, 6.2287788},
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};
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static const float xTab[14] = {7.6, 3.6, 4.4, 3.7, 6.1, 5.1, 2.3, 1.6, 6.2, 1.5, 1.8, 1.2, 0, 0}; //10014048
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/* precomputed table for 10^(i/4), i=-15..16 */
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static const float imc_exp_tab[32] = {
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1.778280e-4, 3.162278e-4, 5.623413e-4, 1.000000e-3,
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1.778280e-3, 3.162278e-3, 5.623413e-3, 1.000000e-2,
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1.778280e-2, 3.162278e-2, 5.623413e-2, 1.000000e-1,
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1.778280e-1, 3.162278e-1, 5.623413e-1, 1.000000e00,
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1.778280e00, 3.162278e00, 5.623413e00, 1.000000e01,
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1.778280e01, 3.162278e01, 5.623413e01, 1.000000e02,
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1.778280e02, 3.162278e02, 5.623413e02, 1.000000e03,
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1.778280e03, 3.162278e03, 5.623413e03, 1.000000e04
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};
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static const float * const imc_exp_tab2 = imc_exp_tab + 8;
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static const uint8_t imc_cb_select[4][32] = {
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{ 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 },
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{ 0, 2, 0, 3, 2, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
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{ 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 },
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{ 0, 1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
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};
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static const uint8_t imc_huffman_sizes[4] = {
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17, 17, 18, 18
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};
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static const uint8_t imc_huffman_lens[4][4][18] = {
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{
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{ 1, 2, 5, 6, 11, 12, 15, 16, 16, 14, 13, 10, 9, 8, 7, 4, 3 },
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{ 2, 3, 3, 4, 4, 4, 6, 6, 7, 7, 7, 8, 9, 10, 11, 11, 2 },
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{ 1, 4, 4, 7, 9, 10, 12, 15, 15, 14, 13, 11, 8, 6, 5, 4, 2 },
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{ 2, 2, 4, 8, 9, 14, 15, 15, 13, 12, 11, 10, 7, 6, 5, 3, 2 },
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},
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{
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{ 2, 2, 3, 4, 7, 7, 10, 11, 12, 14, 14, 13, 9, 8, 7, 5, 2 },
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{ 2, 3, 14, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 3, 2 },
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{ 2, 3, 3, 4, 4, 5, 7, 9, 11, 12, 13, 13, 10, 8, 6, 4, 2 },
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{ 2, 3, 3, 4, 4, 5, 7, 9, 11, 12, 13, 13, 10, 8, 6, 4, 2 },
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},
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{
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{ 3, 5, 8, 9, 12, 15, 17, 17, 16, 14, 13, 11, 10, 7, 6, 4, 2, 1 },
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{ 4, 7, 8, 10, 11, 12, 15, 16, 16, 14, 13, 9, 6, 5, 3, 2, 2, 2 },
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{ 4, 5, 6, 7, 12, 13, 17, 17, 16, 15, 14, 11, 10, 9, 8, 3, 2, 1 },
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{ 2, 5, 7, 8, 14, 15, 16, 16, 13, 12, 11, 10, 9, 6, 4, 3, 2, 2 },
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},
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{
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{ 2, 4, 7, 9, 10, 12, 13, 15, 16, 16, 14, 11, 8, 6, 5, 3, 2, 2 },
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{ 3, 5, 5, 7, 10, 11, 11, 9, 8, 6, 5, 4, 4, 3, 3, 3, 3, 3 },
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{ 5, 8, 9, 9, 7, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2 },
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{ 2, 3, 5, 7, 8, 11, 12, 13, 15, 15, 14, 10, 9, 6, 4, 3, 3, 2 },
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}
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};
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static const uint8_t imc_huffman_syms[4][4][18] = {
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{
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{ 7, 8, 5, 10, 3, 13, 1, 0, 15, 14, 2, 12, 11, 4, 16, 9, 6 },
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{ 8, 9, 6, 10, 5, 4, 11, 3, 16, 12, 2, 1, 13, 0, 14, 15, 7 },
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{ 8, 6, 9, 11, 12, 13, 14, 1, 0, 2, 15, 3, 4, 5, 10, 16, 7 },
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{ 8, 6, 5, 3, 12, 16, 15, 14, 0, 13, 1, 2, 11, 4, 10, 9, 7 },
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},
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{
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{ 8, 7, 9, 5, 16, 4, 2, 13, 1, 15, 0, 14, 12, 3, 11, 10, 6 },
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{ 8, 16, 0, 15, 1, 14, 2, 13, 12, 3, 11, 4, 10, 5, 6, 9, 7 },
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{ 8, 6, 9, 10, 16, 4, 3, 13, 14, 1, 0, 15, 2, 12, 11, 5, 7 },
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{ 8, 6, 9, 10, 16, 4, 3, 13, 14, 1, 0, 15, 2, 12, 11, 5, 7 },
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},
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{
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{ 6, 5, 4, 11, 2, 14, 15, 17, 0, 1, 13, 12, 3, 10, 16, 9, 8, 7 },
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{ 5, 11, 3, 12, 2, 13, 0, 17, 15, 14, 1, 16, 4, 10, 9, 6, 7, 8 },
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{ 16, 9, 5, 10, 1, 12, 15, 17, 14, 13, 0, 2, 11, 3, 4, 6, 8, 7 },
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{ 8, 5, 4, 12, 1, 15, 0, 17, 14, 2, 13, 16, 3, 11, 10, 9, 6, 7 },
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},
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{
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{ 7, 9, 4, 11, 2, 12, 0, 14, 17, 15, 13, 1, 3, 10, 5, 16, 8, 6 },
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{ 8, 17, 15, 5, 2, 1, 0, 3, 4, 16, 6, 7, 14, 13, 9, 10, 12, 11 },
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{ 4, 16, 0, 1, 2, 3, 17, 15, 14, 13, 11, 5, 12, 10, 9, 7, 6, 8 },
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{ 7, 9, 4, 11, 3, 13, 1, 0, 15, 17, 14, 2, 12, 16, 10, 6, 5, 8 },
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}
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};
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#endif /* AVCODEC_IMCDATA_H */
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