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https://github.com/FFmpeg/FFmpeg.git
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104abea646
Move AC3HeaderInfo into ac3_parser_internal.h and the rest into a new header ac3defs.h. This also breaks an include cycle of ac3.h and ac3tab.h (the latter now only needs ac3defs.h). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
168 lines
4.6 KiB
C
168 lines
4.6 KiB
C
/*
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* AC-3 tables
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* copyright (c) 2001 Fabrice Bellard
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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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* tables taken directly from the AC-3 spec.
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*/
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#include "libavutil/channel_layout.h"
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#include "ac3tab.h"
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/**
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* Possible frame sizes.
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* from ATSC A/52 Table 5.18 Frame Size Code Table.
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*/
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const uint16_t ff_ac3_frame_size_tab[38][3] = {
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{ 64, 69, 96 },
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{ 64, 70, 96 },
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{ 80, 87, 120 },
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{ 80, 88, 120 },
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{ 96, 104, 144 },
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{ 96, 105, 144 },
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{ 112, 121, 168 },
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{ 112, 122, 168 },
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{ 128, 139, 192 },
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{ 128, 140, 192 },
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{ 160, 174, 240 },
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{ 160, 175, 240 },
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{ 192, 208, 288 },
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{ 192, 209, 288 },
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{ 224, 243, 336 },
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{ 224, 244, 336 },
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{ 256, 278, 384 },
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{ 256, 279, 384 },
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{ 320, 348, 480 },
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{ 320, 349, 480 },
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{ 384, 417, 576 },
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{ 384, 418, 576 },
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{ 448, 487, 672 },
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{ 448, 488, 672 },
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{ 512, 557, 768 },
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{ 512, 558, 768 },
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{ 640, 696, 960 },
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{ 640, 697, 960 },
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{ 768, 835, 1152 },
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{ 768, 836, 1152 },
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{ 896, 975, 1344 },
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{ 896, 976, 1344 },
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{ 1024, 1114, 1536 },
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{ 1024, 1115, 1536 },
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{ 1152, 1253, 1728 },
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{ 1152, 1254, 1728 },
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{ 1280, 1393, 1920 },
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{ 1280, 1394, 1920 },
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};
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/**
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* Map audio coding mode (acmod) to number of full-bandwidth channels.
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* from ATSC A/52 Table 5.8 Audio Coding Mode
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*/
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const uint8_t ff_ac3_channels_tab[8] = {
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2, 1, 2, 3, 3, 4, 4, 5
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};
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/**
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* Table to remap channels from AC-3 order to SMPTE order.
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* [channel_mode][lfe][ch]
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*/
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const uint8_t ff_ac3_dec_channel_map[8][2][6] = {
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COMMON_CHANNEL_MAP
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{ { 0, 1, 2, 3, }, { 0, 1, 4, 2, 3, } },
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{ { 0, 2, 1, 3, 4, }, { 0, 2, 1, 5, 3, 4 } },
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};
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/* possible frequencies */
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const int ff_ac3_sample_rate_tab[] = { 48000, 44100, 32000, 0 };
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/* possible bitrates */
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const uint16_t ff_ac3_bitrate_tab[19] = {
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32, 40, 48, 56, 64, 80, 96, 112, 128,
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160, 192, 224, 256, 320, 384, 448, 512, 576, 640
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};
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/**
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* Table of bin locations for rematrixing bands
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* reference: Section 7.5.2 Rematrixing : Frequency Band Definitions
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*/
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const uint8_t ff_ac3_rematrix_band_tab[5] = { 13, 25, 37, 61, 253 };
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/**
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* Table E2.16 Default Coupling Banding Structure
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*/
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const uint8_t ff_eac3_default_cpl_band_struct[18] = {
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0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1
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};
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const uint8_t ff_ac3_bap_tab[64]= {
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0, 1, 1, 1, 1, 1, 2, 2, 3, 3,
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3, 4, 4, 5, 5, 6, 6, 6, 6, 7,
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7, 7, 7, 8, 8, 8, 8, 9, 9, 9,
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9, 10, 10, 10, 10, 11, 11, 11, 11, 12,
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12, 12, 12, 13, 13, 13, 13, 14, 14, 14,
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14, 14, 14, 14, 14, 15, 15, 15, 15, 15,
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15, 15, 15, 15,
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};
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const uint8_t ff_ac3_slow_decay_tab[4]={
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0x0f, 0x11, 0x13, 0x15,
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};
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const uint8_t ff_ac3_fast_decay_tab[4]={
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0x3f, 0x53, 0x67, 0x7b,
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};
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const uint16_t ff_ac3_slow_gain_tab[4]= {
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0x540, 0x4d8, 0x478, 0x410,
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};
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const uint16_t ff_ac3_db_per_bit_tab[4]= {
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0x000, 0x700, 0x900, 0xb00,
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};
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const int16_t ff_ac3_floor_tab[8]= {
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0x2f0, 0x2b0, 0x270, 0x230, 0x1f0, 0x170, 0x0f0, 0xf800,
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};
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const uint16_t ff_ac3_fast_gain_tab[8]= {
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0x080, 0x100, 0x180, 0x200, 0x280, 0x300, 0x380, 0x400,
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};
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const uint64_t ff_eac3_custom_channel_map_locations[16][2] = {
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{ 1, AV_CH_FRONT_LEFT },
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{ 1, AV_CH_FRONT_CENTER },
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{ 1, AV_CH_FRONT_RIGHT },
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{ 1, AV_CH_SIDE_LEFT },
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{ 1, AV_CH_SIDE_RIGHT },
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{ 0, AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER },
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{ 0, AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT },
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{ 0, AV_CH_BACK_CENTER },
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{ 0, AV_CH_TOP_CENTER },
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{ 0, AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT },
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{ 0, AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT },
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{ 0, AV_CH_TOP_FRONT_LEFT | AV_CH_TOP_FRONT_RIGHT},
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{ 0, AV_CH_TOP_FRONT_CENTER },
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{ 0, AV_CH_TOP_BACK_LEFT | AV_CH_TOP_BACK_RIGHT },
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{ 0, AV_CH_LOW_FREQUENCY_2 },
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{ 1, AV_CH_LOW_FREQUENCY },
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};
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