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5d503c91f3
Expressions like array[get_vlc2()] can be optimized by using a symbols table if the array is always the same for a given VLC. This requirement is fulfilled for several VLCs used by ATRAC3, therefore this commit implements this. This comes without any additional costs when using ff_init_vlc_from_lengths() as one can then remove the codes tables. While at it, remove the arrays of pointers to the individual arrays and put all lengths+symbol pairs in one big array. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
108 lines
3.9 KiB
C
108 lines
3.9 KiB
C
/*
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* ATRAC3 compatible decoder data
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* Copyright (c) 2006-2007 Maxim Poliakovski
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* Copyright (c) 2006-2007 Benjamin Larsson
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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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/**
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* @file
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* ATRAC3 AKA RealAudio 8 compatible decoder data
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*/
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#ifndef AVCODEC_ATRAC3DATA_H
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#define AVCODEC_ATRAC3DATA_H
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#include <stdint.h>
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/* VLC tables */
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static const uint8_t atrac3_hufftabs[][2] = {
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/* Spectral coefficient 1 - 9 entries */
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{ 31, 1 }, { 32, 3 }, { 33, 3 }, { 34, 4 }, { 35, 4 },
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{ 36, 5 }, { 37, 5 }, { 38, 5 }, { 39, 5 },
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/* Spectral coefficient 2 - 5 entries */
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{ 31, 1 }, { 32, 3 }, { 30, 3 }, { 33, 3 }, { 29, 3 },
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/* Spectral coefficient 3 - 7 entries */
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{ 31, 1 }, { 32, 3 }, { 30, 3 }, { 33, 4 },
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{ 29, 4 }, { 34, 4 }, { 28, 4 },
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/* Spectral coefficient 4 - 9 entries */
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{ 31, 1 }, { 32, 3 }, { 30, 3 }, { 33, 4 }, { 29, 4 },
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{ 34, 5 }, { 28, 5 }, { 35, 5 }, { 27, 5 },
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/* Spectral coefficient 5 - 15 entries */
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{ 31, 2 }, { 32, 3 }, { 30, 3 }, { 33, 4 }, { 29, 4 },
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{ 34, 4 }, { 28, 4 }, { 38, 4 }, { 24, 4 }, { 35, 5 },
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{ 27, 5 }, { 36, 6 }, { 26, 6 }, { 37, 6 }, { 25, 6 },
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/* Spectral coefficient 6 - 31 entries */
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{ 31, 3 }, { 32, 4 }, { 30, 4 }, { 33, 4 }, { 29, 4 }, { 34, 4 },
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{ 28, 4 }, { 46, 4 }, { 16, 4 }, { 35, 5 }, { 27, 5 }, { 36, 5 },
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{ 26, 5 }, { 37, 5 }, { 25, 5 }, { 38, 6 }, { 24, 6 }, { 39, 6 },
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{ 23, 6 }, { 40, 6 }, { 22, 6 }, { 41, 6 }, { 21, 6 }, { 42, 7 },
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{ 20, 7 }, { 43, 7 }, { 19, 7 }, { 44, 7 }, { 18, 7 }, { 45, 7 },
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{ 17, 7 },
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/* Spectral coefficient 7 - 63 entries */
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{ 31, 3 }, { 62, 4 }, { 0, 4 }, { 32, 5 }, { 30, 5 }, { 33, 5 },
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{ 29, 5 }, { 34, 5 }, { 28, 5 }, { 35, 5 }, { 27, 5 }, { 36, 5 },
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{ 26, 5 }, { 37, 6 }, { 25, 6 }, { 38, 6 }, { 24, 6 }, { 39, 6 },
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{ 23, 6 }, { 40, 6 }, { 22, 6 }, { 41, 6 }, { 21, 6 }, { 42, 6 },
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{ 20, 6 }, { 43, 6 }, { 19, 6 }, { 44, 6 }, { 18, 6 }, { 45, 7 },
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{ 17, 7 }, { 46, 7 }, { 16, 7 }, { 47, 7 }, { 15, 7 }, { 48, 7 },
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{ 14, 7 }, { 49, 7 }, { 13, 7 }, { 50, 7 }, { 12, 7 }, { 51, 7 },
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{ 11, 7 }, { 52, 8 }, { 10, 8 }, { 53, 8 }, { 9, 8 }, { 54, 8 },
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{ 8, 8 }, { 55, 8 }, { 7, 8 }, { 56, 8 }, { 6, 8 }, { 57, 8 },
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{ 5, 8 }, { 58, 8 }, { 4, 8 }, { 59, 8 }, { 3, 8 }, { 60, 8 },
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{ 2, 8 }, { 61, 8 }, { 1, 8 },
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};
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static const uint8_t huff_tab_sizes[7] = {
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9, 5, 7, 9, 15, 31, 63,
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};
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/* selector tables */
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static const uint8_t clc_length_tab[8] = { 0, 4, 3, 3, 4, 4, 5, 6 };
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static const int8_t mantissa_clc_tab[4] = { 0, 1, -2, -1 };
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static const int8_t mantissa_vlc_tab[18] = {
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0, 0, 0, 1, 0, -1, 1, 0, -1, 0, 1, 1, 1, -1, -1, 1, -1, -1
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};
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/* tables for the scalefactor decoding */
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static const float inv_max_quant[8] = {
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0.0, 1.0 / 1.5, 1.0 / 2.5, 1.0 / 3.5,
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1.0 / 4.5, 1.0 / 7.5, 1.0 / 15.5, 1.0 / 31.5
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};
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static const uint16_t subband_tab[33] = {
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0, 8, 16, 24, 32, 40, 48, 56,
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64, 80, 96, 112, 128, 144, 160, 176,
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192, 224, 256, 288, 320, 352, 384, 416,
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448, 480, 512, 576, 640, 704, 768, 896,
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1024
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};
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/* joint stereo related tables */
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static const float matrix_coeffs[8] = {
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0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0
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};
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#endif /* AVCODEC_ATRAC3DATA_H */
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