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0f4334df45
This commit adds the ability for a profile to set the default options, as well as for the user to override such options by simply stating them in the command line while still keeping the same profile, as long as those options are still permitted by the profile. Example: setting the profile to aac_low (the default) will turn PNS and IS on. They can be disabled by -aac_pns 0 and -aac_is 0, respectively. Turning on -aac_pred 1 will cause the profile to be elevated to aac_main, as long as no options forbidding aac_main have been entered (like AAC-LTP, which will be pushed soon). A useful feature is that by setting the profile to mpeg2_aac_low, all MPEG4 features will be disabled and if the user tries to enable them then the program will exit with an error. This profile is signalled with the same bitstream as aac_low (MPEG4) but some devices and decoders will fail if any MPEG4 features have been enabled.
129 lines
4.6 KiB
C
129 lines
4.6 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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/** Profile option settings **/
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#define OPT_AUTO -1
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#define OPT_BANNED -256
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#define OPT_NEEDS_LTP -384
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#define OPT_NEEDS_MAIN -512
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#define OPT_REQUIRED -768
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#define AAC_MAX_CHANNELS 8
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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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/** 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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#endif /* AVCODEC_AACENCTAB_H */
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