fc9dcfe7d5
The spec is correct, it does list these layouts as having rear speakers. Questionable how many decoders correctly interpret those correctly since side is way more popular. Also fixes fate-aac-yoraw-encode. Reported-by: pkviet <pkv.stream@gmail.com> Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
140 lines
4.9 KiB
C
140 lines
4.9 KiB
C
/*
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* AAC encoder data
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* Copyright (c) 2015 Rostislav Pehlivanov ( atomnuker gmail com )
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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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* AAC encoder data
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* @author Rostislav Pehlivanov ( atomnuker gmail com )
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*/
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#ifndef AVCODEC_AACENCTAB_H
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#define AVCODEC_AACENCTAB_H
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#include "aac.h"
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/** Total number of usable codebooks **/
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#define CB_TOT 12
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/** Total number of codebooks, including special ones **/
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#define CB_TOT_ALL 15
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#define AAC_MAX_CHANNELS 16
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extern const uint8_t *ff_aac_swb_size_1024[];
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extern const int ff_aac_swb_size_1024_len;
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extern const uint8_t *ff_aac_swb_size_128[];
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extern const int ff_aac_swb_size_128_len;
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/* Supported layouts without using a PCE */
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static const int64_t aac_normal_chan_layouts[7] = {
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AV_CH_LAYOUT_MONO,
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AV_CH_LAYOUT_STEREO,
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AV_CH_LAYOUT_SURROUND,
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AV_CH_LAYOUT_4POINT0,
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AV_CH_LAYOUT_5POINT0_BACK,
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AV_CH_LAYOUT_5POINT1_BACK,
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AV_CH_LAYOUT_7POINT1,
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};
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/** default channel configurations */
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static const uint8_t aac_chan_configs[AAC_MAX_CHANNELS][6] = {
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{1, TYPE_SCE}, // 1 channel - single channel element
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{1, TYPE_CPE}, // 2 channels - channel pair
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{2, TYPE_SCE, TYPE_CPE}, // 3 channels - center + stereo
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{3, TYPE_SCE, TYPE_CPE, TYPE_SCE}, // 4 channels - front center + stereo + back center
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{3, TYPE_SCE, TYPE_CPE, TYPE_CPE}, // 5 channels - front center + stereo + back stereo
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{4, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_LFE}, // 6 channels - front center + stereo + back stereo + LFE
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{0}, // 7 channels - invalid without PCE
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{5, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_CPE, TYPE_LFE}, // 8 channels - front center + front stereo + side stereo + back stereo + LFE
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};
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/**
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* Table to remap channels from libavcodec's default order to AAC order.
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*/
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static const uint8_t aac_chan_maps[AAC_MAX_CHANNELS][AAC_MAX_CHANNELS] = {
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{ 0 },
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{ 0, 1 },
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{ 2, 0, 1 },
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{ 2, 0, 1, 3 },
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{ 2, 0, 1, 3, 4 },
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{ 2, 0, 1, 4, 5, 3 },
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{ 0 },
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{ 2, 0, 1, 6, 7, 4, 5, 3 },
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};
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/* duplicated from avpriv_mpeg4audio_sample_rates to avoid shared build
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* failures */
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static const int mpeg4audio_sample_rates[16] = {
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96000, 88200, 64000, 48000, 44100, 32000,
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24000, 22050, 16000, 12000, 11025, 8000, 7350
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};
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/** bits needed to code codebook run value for long windows */
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static const uint8_t run_value_bits_long[64] = {
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 10,
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10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
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10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 15
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};
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/** bits needed to code codebook run value for short windows */
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static const uint8_t run_value_bits_short[16] = {
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3, 3, 3, 3, 3, 3, 3, 6, 6, 6, 6, 6, 6, 6, 6, 9
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};
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/* TNS starting SFBs for long and short windows */
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static const uint8_t tns_min_sfb_short[16] = {
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2, 2, 2, 3, 3, 4, 6, 6, 8, 10, 10, 12, 12, 12, 12, 12
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};
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static const uint8_t tns_min_sfb_long[16] = {
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12, 13, 15, 16, 17, 20, 25, 26, 24, 28, 30, 31, 31, 31, 31, 31
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};
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static const uint8_t * const tns_min_sfb[2] = {
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tns_min_sfb_long, tns_min_sfb_short
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};
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static const uint8_t * const run_value_bits[2] = {
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run_value_bits_long, run_value_bits_short
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};
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/** Map to convert values from BandCodingPath index to a codebook index **/
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static const uint8_t aac_cb_out_map[CB_TOT_ALL] = {0,1,2,3,4,5,6,7,8,9,10,11,13,14,15};
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/** Inverse map to convert from codebooks to BandCodingPath indices **/
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static const uint8_t aac_cb_in_map[CB_TOT_ALL+1] = {0,1,2,3,4,5,6,7,8,9,10,11,0,12,13,14};
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static const uint8_t aac_cb_range [12] = {0, 3, 3, 3, 3, 9, 9, 8, 8, 13, 13, 17};
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static const uint8_t aac_cb_maxval[12] = {0, 1, 1, 2, 2, 4, 4, 7, 7, 12, 12, 16};
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static const unsigned char aac_maxval_cb[] = {
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0, 1, 3, 5, 5, 7, 7, 7, 9, 9, 9, 9, 9, 11
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};
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static const int aacenc_profiles[] = {
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FF_PROFILE_AAC_MAIN,
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FF_PROFILE_AAC_LOW,
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FF_PROFILE_AAC_LTP,
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FF_PROFILE_MPEG2_AAC_LOW,
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};
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#endif /* AVCODEC_AACENCTAB_H */
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