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145 lines
4.1 KiB
C
145 lines
4.1 KiB
C
/*
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* Atrac 3 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 libavcodec/atrac3data.h
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* Atrac 3 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] = {
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1,3,3,4,4,5,5,5,5,
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};
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static const uint8_t huffcode2[5] = {
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0x0,0x4,0x5,0x6,0x7,
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};
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static const uint8_t huffbits2[5] = {
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1,3,3,3,3,
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};
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static const uint8_t huffcode3[7] = {
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0x0,0x4,0x5,0xC,0xD,0xE,0xF,
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};
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static const uint8_t huffbits3[7] = {
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1,3,3,4,4,4,4,
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};
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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] = {
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1,3,3,4,4,5,5,5,5,
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};
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static const uint8_t huffcode5[15] = {
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0x0,0x2,0x3,0x8,0x9,0xA,0xB,0x1C,0x1D,0x3C,0x3D,0x3E,0x3F,0xC,0xD,
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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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0x0,0x2,0x3,0x4,0x5,0x6,0x7,0x14,0x15,0x16,0x17,0x18,0x19,0x34,0x35,
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0x36,0x37,0x38,0x39,0x3A,0x3B,0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,0x8,0x9,
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};
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static const uint8_t huffbits6[31] = {
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3,4,4,4,4,4,4,5,5,5,5,5,5,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,4,4
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};
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static const uint8_t huffcode7[63] = {
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0x0,0x8,0x9,0xA,0xB,0xC,0xD,0xE,0xF,0x10,0x11,0x24,0x25,0x26,0x27,0x28,
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0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x68,0x69,0x6A,0x6B,0x6C,
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0x6D,0x6E,0x6F,0x70,0x71,0x72,0x73,0x74,0x75,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,
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0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x2,0x3,
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};
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static const uint8_t huffbits7[63] = {
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3,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,7,7,7,7,7,
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7,7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,4,4
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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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static const uint16_t atrac3_vlc_offs[] = {
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0,512,1024,1536,2048,2560,3072,3584,4096
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};
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/* selector tables */
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static const uint8_t CLCLengthTab[8] = {0, 4, 3, 3, 4, 4, 5, 6};
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static const int8_t seTab_0[4] = {0, 1, -2, -1};
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static const int8_t decTable1[18] = {0,0, 0,1, 0,-1, 1,0, -1,0, 1,1, 1,-1, -1,1, -1,-1};
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/* tables for the scalefactor decoding */
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static const float iMaxQuant[8] = {
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0.0, 1.0/1.5, 1.0/2.5, 1.0/3.5, 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 subbandTab[33] = {
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0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224,
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256, 288, 320, 352, 384, 416, 448, 480, 512, 576, 640, 704, 768, 896, 1024
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};
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/* transform data */
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static const float qmf_48tap_half[24] = {
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-0.00001461907, -0.00009205479, -0.000056157569, 0.00030117269,
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0.0002422519,-0.00085293897, -0.0005205574, 0.0020340169,
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0.00078333891, -0.0042153862, -0.00075614988, 0.0078402944,
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-0.000061169922, -0.01344162, 0.0024626821, 0.021736089,
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-0.007801671, -0.034090221, 0.01880949, 0.054326009,
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-0.043596379, -0.099384367, 0.13207909, 0.46424159
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};
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/* joint stereo related tables */
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static const float matrixCoeffs[8] = {0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0};
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#endif /* AVCODEC_ATRAC3DATA_H */
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