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Diffstat (limited to 'libavcodec/aacenctab.h')
| -rw-r--r-- | libavcodec/aacenctab.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/libavcodec/aacenctab.h b/libavcodec/aacenctab.h new file mode 100644 index 0000000000..5fc9411232 --- /dev/null +++ b/libavcodec/aacenctab.h @@ -0,0 +1,128 @@ +/* + * 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 8 + +extern const uint8_t *ff_aac_swb_size_1024[]; +extern const int ff_aac_swb_size_1024_len; +extern const uint8_t *ff_aac_swb_size_128[]; +extern const int ff_aac_swb_size_128_len; + +/** 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 */ |