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The longest code of any of the VLC tables used is eight bits long, so using nine bits long VLC tables is wasteful. Furthermore, there are only seven VLC tables used, yet the code up until now made it look like there should be eight. This has been corrected, too. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
138 lines
4.0 KiB
C
138 lines
4.0 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 huffcode1[9] = {
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0x0, 0x4, 0x5, 0xC, 0xD, 0x1C, 0x1D, 0x1E, 0x1F
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};
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static const uint8_t huffbits1[9] = { 1, 3, 3, 4, 4, 5, 5, 5, 5 };
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static const uint8_t huffcode2[5] = { 0x0, 0x4, 0x5, 0x6, 0x7 };
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static const uint8_t huffbits2[5] = { 1, 3, 3, 3, 3 };
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static const uint8_t huffcode3[7] = { 0x0, 0x4, 0x5, 0xC, 0xD, 0xE, 0xF };
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static const uint8_t huffbits3[7] = { 1, 3, 3, 4, 4, 4, 4 };
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static const uint8_t huffcode4[9] = {
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0x0, 0x4, 0x5, 0xC, 0xD, 0x1C, 0x1D, 0x1E, 0x1F
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};
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static const uint8_t huffbits4[9] = { 1, 3, 3, 4, 4, 5, 5, 5, 5 };
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static const uint8_t huffcode5[15] = {
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0x00, 0x02, 0x03, 0x08, 0x09, 0x0A, 0x0B, 0x1C,
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0x1D, 0x3C, 0x3D, 0x3E, 0x3F, 0x0C, 0x0D
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};
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static const uint8_t huffbits5[15] = {
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2, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6, 4, 4
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};
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static const uint8_t huffcode6[31] = {
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0x00, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x14,
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0x15, 0x16, 0x17, 0x18, 0x19, 0x34, 0x35, 0x36,
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0x37, 0x38, 0x39, 0x3A, 0x3B, 0x78, 0x79, 0x7A,
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0x7B, 0x7C, 0x7D, 0x7E, 0x7F, 0x08, 0x09
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};
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static const uint8_t huffbits6[31] = {
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3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6,
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6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4
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};
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static const uint8_t huffcode7[63] = {
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0x00, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E,
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0x0F, 0x10, 0x11, 0x24, 0x25, 0x26, 0x27, 0x28,
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0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30,
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0x31, 0x32, 0x33, 0x68, 0x69, 0x6A, 0x6B, 0x6C,
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0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74,
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0x75, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2,
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0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA,
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0xFB, 0xFC, 0xFD, 0xFE, 0xFF, 0x02, 0x03
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};
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static const uint8_t huffbits7[63] = {
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3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6,
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7,
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7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8,
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4
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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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static const uint8_t* const huff_codes[7] = {
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huffcode1, huffcode2, huffcode3, huffcode4, huffcode5, huffcode6, huffcode7
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};
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static const uint8_t* const huff_bits[7] = {
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huffbits1, huffbits2, huffbits3, huffbits4, huffbits5, huffbits6, huffbits7,
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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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