| /* |
| * AAC encoder data |
| * Copyright (c) 2015 Rostislav Pehlivanov ( atomnuker gmail com ) |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * AAC encoder data |
| * @author Rostislav Pehlivanov ( atomnuker gmail com ) |
| */ |
| |
| #ifndef AVCODEC_AACENCTAB_H |
| #define AVCODEC_AACENCTAB_H |
| |
| #include "aac.h" |
| |
| /** Total number of usable codebooks **/ |
| #define CB_TOT 12 |
| |
| /** Total number of codebooks, including special ones **/ |
| #define CB_TOT_ALL 15 |
| |
| #define AAC_MAX_CHANNELS 16 |
| |
| extern const uint8_t *const ff_aac_swb_size_1024[]; |
| extern const int ff_aac_swb_size_1024_len; |
| extern const uint8_t *const ff_aac_swb_size_128[]; |
| extern const int ff_aac_swb_size_128_len; |
| |
| /* Supported layouts without using a PCE */ |
| static const int64_t aac_normal_chan_layouts[7] = { |
| AV_CH_LAYOUT_MONO, |
| AV_CH_LAYOUT_STEREO, |
| AV_CH_LAYOUT_SURROUND, |
| AV_CH_LAYOUT_4POINT0, |
| AV_CH_LAYOUT_5POINT0_BACK, |
| AV_CH_LAYOUT_5POINT1_BACK, |
| AV_CH_LAYOUT_7POINT1, |
| }; |
| |
| /** default channel configurations */ |
| static const uint8_t aac_chan_configs[AAC_MAX_CHANNELS][6] = { |
| {1, TYPE_SCE}, // 1 channel - single channel element |
| {1, TYPE_CPE}, // 2 channels - channel pair |
| {2, TYPE_SCE, TYPE_CPE}, // 3 channels - center + stereo |
| {3, TYPE_SCE, TYPE_CPE, TYPE_SCE}, // 4 channels - front center + stereo + back center |
| {3, TYPE_SCE, TYPE_CPE, TYPE_CPE}, // 5 channels - front center + stereo + back stereo |
| {4, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_LFE}, // 6 channels - front center + stereo + back stereo + LFE |
| {0}, // 7 channels - invalid without PCE |
| {5, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_CPE, TYPE_LFE}, // 8 channels - front center + front stereo + side stereo + back stereo + LFE |
| }; |
| |
| /** |
| * Table to remap channels from libavcodec's default order to AAC order. |
| */ |
| static const uint8_t aac_chan_maps[AAC_MAX_CHANNELS][AAC_MAX_CHANNELS] = { |
| { 0 }, |
| { 0, 1 }, |
| { 2, 0, 1 }, |
| { 2, 0, 1, 3 }, |
| { 2, 0, 1, 3, 4 }, |
| { 2, 0, 1, 4, 5, 3 }, |
| { 0 }, |
| { 2, 0, 1, 6, 7, 4, 5, 3 }, |
| }; |
| |
| /* duplicated from avpriv_mpeg4audio_sample_rates to avoid shared build |
| * failures */ |
| static const int mpeg4audio_sample_rates[16] = { |
| 96000, 88200, 64000, 48000, 44100, 32000, |
| 24000, 22050, 16000, 12000, 11025, 8000, 7350 |
| }; |
| |
| /** bits needed to code codebook run value for long windows */ |
| static const uint8_t run_value_bits_long[64] = { |
| 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, |
| 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 10, |
| 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, |
| 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 15 |
| }; |
| |
| /** bits needed to code codebook run value for short windows */ |
| static const uint8_t run_value_bits_short[16] = { |
| 3, 3, 3, 3, 3, 3, 3, 6, 6, 6, 6, 6, 6, 6, 6, 9 |
| }; |
| |
| /* TNS starting SFBs for long and short windows */ |
| static const uint8_t tns_min_sfb_short[16] = { |
| 2, 2, 2, 3, 3, 4, 6, 6, 8, 10, 10, 12, 12, 12, 12, 12 |
| }; |
| |
| static const uint8_t tns_min_sfb_long[16] = { |
| 12, 13, 15, 16, 17, 20, 25, 26, 24, 28, 30, 31, 31, 31, 31, 31 |
| }; |
| |
| static const uint8_t * const tns_min_sfb[2] = { |
| tns_min_sfb_long, tns_min_sfb_short |
| }; |
| |
| static const uint8_t * const run_value_bits[2] = { |
| run_value_bits_long, run_value_bits_short |
| }; |
| |
| /** Map to convert values from BandCodingPath index to a codebook index **/ |
| 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}; |
| /** Inverse map to convert from codebooks to BandCodingPath indices **/ |
| 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}; |
| |
| static const uint8_t aac_cb_range [12] = {0, 3, 3, 3, 3, 9, 9, 8, 8, 13, 13, 17}; |
| static const uint8_t aac_cb_maxval[12] = {0, 1, 1, 2, 2, 4, 4, 7, 7, 12, 12, 16}; |
| |
| static const unsigned char aac_maxval_cb[] = { |
| 0, 1, 3, 5, 5, 7, 7, 7, 9, 9, 9, 9, 9, 11 |
| }; |
| |
| static const int aacenc_profiles[] = { |
| FF_PROFILE_AAC_MAIN, |
| FF_PROFILE_AAC_LOW, |
| FF_PROFILE_AAC_LTP, |
| FF_PROFILE_MPEG2_AAC_LOW, |
| }; |
| |
| #endif /* AVCODEC_AACENCTAB_H */ |