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FFmpeg/libavcodec/aacdec_common.c

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/*
* Common code and tables of the AAC fixed- and floating-point decoders
* Copyright (c) 2005-2006 Oded Shimon ( ods15 ods15 dyndns org )
* Copyright (c) 2006-2007 Maxim Gavrilov ( maxim.gavrilov 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
* Common code and tables of the AAC fixed- and floating-point decoders
*/
#include "aac.h"
#include "aacdectab.h"
#include "aacps.h"
#include "aactab.h"
#include "vlc.h"
#include "libavutil/attributes.h"
#include "libavutil/thread.h"
const int8_t ff_tags_per_config[16] = { 0, 1, 1, 2, 3, 3, 4, 5, 0, 0, 0, 5, 5, 16, 5, 0 };
const uint8_t ff_aac_channel_layout_map[16][16][3] = {
{ { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, },
{ { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, },
{ { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, },
{ { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_SCE, 1, AAC_CHANNEL_BACK }, },
{ { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 1, AAC_CHANNEL_BACK }, },
{ { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 1, AAC_CHANNEL_BACK }, { TYPE_LFE, 0, AAC_CHANNEL_LFE }, },
{ { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 1, AAC_CHANNEL_FRONT }, { TYPE_CPE, 2, AAC_CHANNEL_BACK }, { TYPE_LFE, 0, AAC_CHANNEL_LFE }, },
{ { 0, } },
{ { 0, } },
{ { 0, } },
{ { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 1, AAC_CHANNEL_BACK }, { TYPE_SCE, 1, AAC_CHANNEL_BACK }, { TYPE_LFE, 0, AAC_CHANNEL_LFE }, },
{ { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 1, AAC_CHANNEL_BACK }, { TYPE_CPE, 2, AAC_CHANNEL_BACK }, { TYPE_LFE, 0, AAC_CHANNEL_LFE }, },
{
{ TYPE_SCE, 0, AAC_CHANNEL_FRONT }, // SCE1 = FC,
{ TYPE_CPE, 0, AAC_CHANNEL_FRONT }, // CPE1 = FLc and FRc,
{ TYPE_CPE, 1, AAC_CHANNEL_FRONT }, // CPE2 = FL and FR,
{ TYPE_CPE, 2, AAC_CHANNEL_BACK }, // CPE3 = SiL and SiR,
{ TYPE_CPE, 3, AAC_CHANNEL_BACK }, // CPE4 = BL and BR,
{ TYPE_SCE, 1, AAC_CHANNEL_BACK }, // SCE2 = BC,
{ TYPE_LFE, 0, AAC_CHANNEL_LFE }, // LFE1 = LFE1,
{ TYPE_LFE, 1, AAC_CHANNEL_LFE }, // LFE2 = LFE2,
{ TYPE_SCE, 2, AAC_CHANNEL_FRONT }, // SCE3 = TpFC,
{ TYPE_CPE, 4, AAC_CHANNEL_FRONT }, // CPE5 = TpFL and TpFR,
{ TYPE_CPE, 5, AAC_CHANNEL_SIDE }, // CPE6 = TpSiL and TpSiR,
{ TYPE_SCE, 3, AAC_CHANNEL_SIDE }, // SCE4 = TpC,
{ TYPE_CPE, 6, AAC_CHANNEL_BACK }, // CPE7 = TpBL and TpBR,
{ TYPE_SCE, 4, AAC_CHANNEL_BACK }, // SCE5 = TpBC,
{ TYPE_SCE, 5, AAC_CHANNEL_FRONT }, // SCE6 = BtFC,
{ TYPE_CPE, 7, AAC_CHANNEL_FRONT }, // CPE8 = BtFL and BtFR
},
{ { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 1, AAC_CHANNEL_BACK }, { TYPE_LFE, 0, AAC_CHANNEL_LFE }, { TYPE_CPE, 2, AAC_CHANNEL_FRONT }, },
{ { 0, } },
};
const int16_t ff_aac_channel_map[3][4][6] = {
{
{ AV_CHAN_FRONT_CENTER, AV_CHAN_FRONT_LEFT_OF_CENTER, AV_CHAN_FRONT_RIGHT_OF_CENTER, AV_CHAN_FRONT_LEFT, AV_CHAN_FRONT_RIGHT, AV_CHAN_NONE },
{ AV_CHAN_UNUSED, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE },
{ AV_CHAN_UNUSED, AV_CHAN_SIDE_LEFT, AV_CHAN_SIDE_RIGHT, AV_CHAN_BACK_LEFT, AV_CHAN_BACK_RIGHT, AV_CHAN_BACK_CENTER },
{ AV_CHAN_LOW_FREQUENCY, AV_CHAN_LOW_FREQUENCY_2, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE },
},
{
{ AV_CHAN_TOP_FRONT_CENTER, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_TOP_FRONT_LEFT, AV_CHAN_TOP_FRONT_RIGHT, AV_CHAN_NONE },
{ AV_CHAN_UNUSED, AV_CHAN_TOP_SIDE_LEFT, AV_CHAN_TOP_SIDE_RIGHT, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_TOP_CENTER},
{ AV_CHAN_UNUSED, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_TOP_BACK_LEFT, AV_CHAN_TOP_BACK_RIGHT, AV_CHAN_TOP_BACK_CENTER},
{ AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE},
},
{
{ AV_CHAN_BOTTOM_FRONT_CENTER, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_BOTTOM_FRONT_LEFT, AV_CHAN_BOTTOM_FRONT_RIGHT, AV_CHAN_NONE },
{ AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE },
{ AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE },
{ AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE, AV_CHAN_NONE },
},
};
#if FF_API_OLD_CHANNEL_LAYOUT
const uint64_t ff_aac_channel_layout[] = {
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_WIDE_BACK,
AV_CH_LAYOUT_6POINT1_BACK,
AV_CH_LAYOUT_7POINT1,
AV_CH_LAYOUT_22POINT2,
AV_CH_LAYOUT_7POINT1_TOP_BACK,
0,
};
#endif
const AVChannelLayout ff_aac_ch_layout[] = {
AV_CHANNEL_LAYOUT_MONO,
AV_CHANNEL_LAYOUT_STEREO,
AV_CHANNEL_LAYOUT_SURROUND,
AV_CHANNEL_LAYOUT_4POINT0,
AV_CHANNEL_LAYOUT_5POINT0_BACK,
AV_CHANNEL_LAYOUT_5POINT1_BACK,
AV_CHANNEL_LAYOUT_7POINT1_WIDE_BACK,
AV_CHANNEL_LAYOUT_6POINT1_BACK,
AV_CHANNEL_LAYOUT_7POINT1,
AV_CHANNEL_LAYOUT_22POINT2,
AV_CHANNEL_LAYOUT_7POINT1_TOP_BACK,
{ 0 },
};
VLCElem ff_vlc_scalefactors[352];
const VLCElem *ff_vlc_spectral[11];
/// Huffman tables for SBR
static const uint8_t sbr_huffman_tab[][2] = {
/* t_huffman_env_1_5dB - 121 entries */
{ 60, 2 }, { 59, 2 }, { 61, 3 }, { 58, 3 }, { 62, 4 },
{ 57, 4 }, { 63, 5 }, { 56, 5 }, { 64, 6 }, { 55, 6 },
{ 65, 7 }, { 54, 7 }, { 66, 8 }, { 53, 8 }, { 67, 9 },
{ 52, 9 }, { 51, 10 }, { 68, 10 }, { 50, 11 }, { 69, 12 },
{ 49, 12 }, { 70, 13 }, { 48, 13 }, { 47, 13 }, { 71, 14 },
{ 46, 14 }, { 72, 14 }, { 45, 14 }, { 44, 15 }, { 73, 15 },
{ 41, 16 }, { 42, 16 }, { 43, 16 }, { 74, 16 }, { 36, 16 },
{ 40, 16 }, { 76, 16 }, { 34, 17 }, { 39, 17 }, { 75, 17 },
{ 37, 17 }, { 35, 18 }, { 38, 18 }, { 0, 18 }, { 1, 18 },
{ 2, 18 }, { 3, 18 }, { 4, 18 }, { 5, 18 }, { 6, 19 },
{ 7, 19 }, { 8, 19 }, { 9, 19 }, { 10, 19 }, { 11, 19 },
{ 12, 19 }, { 13, 19 }, { 14, 19 }, { 15, 19 }, { 16, 19 },
{ 17, 19 }, { 18, 19 }, { 19, 19 }, { 20, 19 }, { 21, 19 },
{ 22, 19 }, { 23, 19 }, { 24, 19 }, { 25, 19 }, { 26, 19 },
{ 27, 19 }, { 28, 19 }, { 29, 19 }, { 30, 19 }, { 31, 19 },
{ 32, 19 }, { 33, 19 }, { 77, 19 }, { 78, 19 }, { 79, 19 },
{ 80, 19 }, { 81, 19 }, { 82, 19 }, { 83, 19 }, { 84, 19 },
{ 85, 19 }, { 86, 19 }, { 87, 19 }, { 88, 19 }, { 89, 19 },
{ 90, 19 }, { 91, 19 }, { 92, 19 }, { 93, 19 }, { 94, 19 },
{ 95, 19 }, { 96, 19 }, { 97, 19 }, { 98, 19 }, { 99, 19 },
{ 100, 19 }, { 101, 19 }, { 102, 19 }, { 103, 19 }, { 104, 19 },
{ 105, 19 }, { 106, 19 }, { 107, 19 }, { 108, 19 }, { 109, 19 },
{ 110, 19 }, { 111, 19 }, { 112, 19 }, { 113, 19 }, { 114, 19 },
{ 115, 19 }, { 116, 19 }, { 117, 19 }, { 118, 19 }, { 119, 19 },
{ 120, 19 },
/* f_huffman_env_1_5dB - 121 entries */
{ 60, 2 }, { 59, 2 }, { 61, 3 }, { 58, 3 }, { 57, 4 },
{ 62, 4 }, { 56, 5 }, { 63, 5 }, { 55, 6 }, { 64, 6 },
{ 54, 7 }, { 65, 8 }, { 53, 8 }, { 66, 8 }, { 52, 9 },
{ 67, 9 }, { 51, 9 }, { 68, 10 }, { 50, 10 }, { 69, 11 },
{ 49, 11 }, { 70, 11 }, { 71, 11 }, { 48, 12 }, { 72, 12 },
{ 47, 12 }, { 73, 12 }, { 74, 13 }, { 46, 13 }, { 45, 13 },
{ 75, 13 }, { 76, 14 }, { 77, 14 }, { 44, 14 }, { 43, 15 },
{ 42, 15 }, { 41, 16 }, { 78, 16 }, { 79, 16 }, { 40, 16 },
{ 39, 16 }, { 80, 17 }, { 81, 17 }, { 36, 17 }, { 37, 17 },
{ 38, 17 }, { 34, 17 }, { 32, 18 }, { 82, 18 }, { 83, 18 },
{ 85, 18 }, { 19, 18 }, { 35, 18 }, { 86, 18 }, { 87, 18 },
{ 30, 18 }, { 33, 18 }, { 84, 18 }, { 88, 18 }, { 104, 18 },
{ 9, 19 }, { 14, 19 }, { 16, 19 }, { 17, 19 }, { 23, 19 },
{ 27, 19 }, { 29, 19 }, { 31, 19 }, { 90, 19 }, { 97, 19 },
{ 102, 19 }, { 107, 19 }, { 108, 19 }, { 0, 19 }, { 1, 19 },
{ 2, 20 }, { 3, 20 }, { 4, 20 }, { 5, 20 }, { 6, 20 },
{ 7, 20 }, { 8, 20 }, { 10, 20 }, { 11, 20 }, { 12, 20 },
{ 13, 20 }, { 15, 20 }, { 18, 20 }, { 20, 20 }, { 21, 20 },
{ 22, 20 }, { 24, 20 }, { 25, 20 }, { 26, 20 }, { 28, 20 },
{ 89, 20 }, { 91, 20 }, { 92, 20 }, { 93, 20 }, { 94, 20 },
{ 95, 20 }, { 96, 20 }, { 98, 20 }, { 99, 20 }, { 100, 20 },
{ 101, 20 }, { 103, 20 }, { 105, 20 }, { 106, 20 }, { 109, 20 },
{ 110, 20 }, { 111, 20 }, { 112, 20 }, { 113, 20 }, { 114, 20 },
{ 115, 20 }, { 116, 20 }, { 117, 20 }, { 118, 20 }, { 119, 20 },
{ 120, 20 },
/* t_huffman_env_bal_1_5dB - 49 entries */
{ 24, 1 }, { 25, 2 }, { 23, 3 }, { 26, 4 }, { 22, 5 },
{ 27, 6 }, { 21, 7 }, { 28, 8 }, { 20, 9 }, { 19, 11 },
{ 29, 11 }, { 18, 12 }, { 30, 12 }, { 31, 15 }, { 17, 16 },
{ 32, 16 }, { 0, 16 }, { 1, 16 }, { 2, 16 }, { 3, 16 },
{ 4, 16 }, { 5, 16 }, { 6, 16 }, { 7, 16 }, { 8, 16 },
{ 9, 16 }, { 10, 16 }, { 11, 16 }, { 12, 16 }, { 13, 16 },
{ 14, 16 }, { 15, 16 }, { 16, 16 }, { 33, 16 }, { 34, 16 },
{ 35, 16 }, { 36, 16 }, { 37, 16 }, { 38, 16 }, { 39, 17 },
{ 40, 17 }, { 41, 17 }, { 42, 17 }, { 43, 17 }, { 44, 17 },
{ 45, 17 }, { 46, 17 }, { 47, 17 }, { 48, 17 },
/* f_huffman_env_bal_1_5dB - 49 entries */
{ 24, 1 }, { 23, 2 }, { 25, 3 }, { 22, 4 }, { 26, 5 },
{ 27, 6 }, { 21, 7 }, { 20, 8 }, { 28, 9 }, { 19, 11 },
{ 29, 11 }, { 18, 11 }, { 30, 12 }, { 17, 14 }, { 31, 15 },
{ 32, 16 }, { 15, 16 }, { 16, 17 }, { 0, 18 }, { 1, 18 },
{ 2, 18 }, { 3, 18 }, { 4, 18 }, { 5, 18 }, { 6, 18 },
{ 7, 18 }, { 8, 18 }, { 9, 18 }, { 10, 18 }, { 11, 18 },
{ 12, 18 }, { 13, 18 }, { 14, 18 }, { 33, 18 }, { 34, 18 },
{ 35, 18 }, { 36, 18 }, { 37, 18 }, { 38, 18 }, { 39, 18 },
{ 40, 18 }, { 41, 18 }, { 42, 18 }, { 43, 18 }, { 44, 18 },
{ 45, 18 }, { 46, 18 }, { 47, 19 }, { 48, 19 },
/* t_huffman_env_3_0dB - 63 entries */
{ 31, 1 }, { 30, 2 }, { 32, 3 }, { 29, 4 }, { 33, 5 },
{ 28, 6 }, { 34, 7 }, { 27, 8 }, { 35, 9 }, { 26, 11 },
{ 36, 11 }, { 25, 12 }, { 24, 13 }, { 37, 13 }, { 23, 14 },
{ 38, 14 }, { 22, 14 }, { 21, 14 }, { 39, 14 }, { 40, 15 },
{ 41, 16 }, { 18, 16 }, { 20, 16 }, { 19, 16 }, { 17, 17 },
{ 42, 17 }, { 43, 18 }, { 0, 18 }, { 1, 18 }, { 2, 19 },
{ 3, 19 }, { 4, 19 }, { 5, 19 }, { 6, 19 }, { 7, 19 },
{ 8, 19 }, { 9, 19 }, { 10, 19 }, { 11, 19 }, { 12, 19 },
{ 13, 19 }, { 14, 19 }, { 15, 19 }, { 16, 19 }, { 44, 19 },
{ 45, 19 }, { 46, 19 }, { 47, 19 }, { 48, 19 }, { 49, 19 },
{ 50, 19 }, { 51, 19 }, { 52, 19 }, { 53, 19 }, { 54, 19 },
{ 55, 19 }, { 56, 19 }, { 57, 19 }, { 58, 19 }, { 59, 19 },
{ 60, 19 }, { 61, 19 }, { 62, 19 },
/* f_huffman_env_3_0dB - 63 entries */
{ 31, 1 }, { 30, 2 }, { 32, 3 }, { 29, 4 }, { 33, 5 },
{ 28, 6 }, { 34, 8 }, { 27, 8 }, { 35, 9 }, { 26, 9 },
{ 36, 10 }, { 25, 10 }, { 37, 11 }, { 24, 11 }, { 38, 12 },
{ 23, 12 }, { 39, 13 }, { 40, 14 }, { 22, 14 }, { 21, 15 },
{ 41, 15 }, { 42, 15 }, { 20, 16 }, { 19, 16 }, { 43, 16 },
{ 44, 16 }, { 18, 17 }, { 16, 17 }, { 45, 17 }, { 46, 17 },
{ 17, 18 }, { 49, 18 }, { 13, 18 }, { 7, 18 }, { 12, 18 },
{ 47, 18 }, { 48, 18 }, { 9, 19 }, { 10, 19 }, { 15, 19 },
{ 51, 19 }, { 52, 19 }, { 53, 19 }, { 56, 19 }, { 8, 19 },
{ 11, 19 }, { 55, 19 }, { 0, 20 }, { 1, 20 }, { 2, 20 },
{ 3, 20 }, { 4, 20 }, { 5, 20 }, { 6, 20 }, { 14, 20 },
{ 50, 20 }, { 54, 20 }, { 57, 20 }, { 58, 20 }, { 59, 20 },
{ 60, 20 }, { 61, 20 }, { 62, 20 },
/* t_huffman_env_bal_3_0dB - 25 entries */
{ 12, 1 }, { 13, 2 }, { 11, 3 }, { 10, 4 }, { 14, 5 },
{ 15, 6 }, { 9, 7 }, { 8, 8 }, { 16, 9 }, { 7, 12 },
{ 0, 13 }, { 1, 13 }, { 2, 13 }, { 3, 13 }, { 4, 13 },
{ 5, 13 }, { 6, 13 }, { 17, 13 }, { 18, 13 }, { 19, 13 },
{ 20, 13 }, { 21, 13 }, { 22, 13 }, { 23, 14 }, { 24, 14 },
/* f_huffman_env_bal_3_0dB - 25 entries */
{ 12, 1 }, { 11, 2 }, { 13, 3 }, { 10, 4 }, { 14, 5 },
{ 15, 6 }, { 9, 7 }, { 8, 8 }, { 16, 9 }, { 7, 11 },
{ 17, 12 }, { 18, 13 }, { 0, 13 }, { 1, 13 }, { 2, 13 },
{ 3, 13 }, { 4, 13 }, { 5, 14 }, { 6, 14 }, { 19, 14 },
{ 20, 14 }, { 21, 14 }, { 22, 14 }, { 23, 14 }, { 24, 14 },
/* t_huffman_noise_3_0dB - 63 entries */
{ 31, 1 }, { 32, 2 }, { 30, 3 }, { 29, 4 }, { 33, 5 },
{ 28, 6 }, { 34, 8 }, { 27, 8 }, { 35, 10 }, { 26, 11 },
{ 36, 13 }, { 42, 13 }, { 0, 13 }, { 1, 13 }, { 2, 13 },
{ 3, 13 }, { 4, 13 }, { 5, 13 }, { 6, 13 }, { 7, 13 },
{ 8, 13 }, { 9, 13 }, { 10, 13 }, { 11, 13 }, { 12, 13 },
{ 13, 13 }, { 14, 13 }, { 15, 13 }, { 16, 13 }, { 17, 13 },
{ 18, 13 }, { 19, 13 }, { 20, 13 }, { 21, 13 }, { 22, 13 },
{ 23, 13 }, { 24, 13 }, { 25, 13 }, { 37, 13 }, { 38, 13 },
{ 39, 13 }, { 40, 13 }, { 41, 13 }, { 43, 13 }, { 44, 13 },
{ 45, 13 }, { 46, 13 }, { 47, 13 }, { 48, 13 }, { 49, 13 },
{ 50, 13 }, { 51, 13 }, { 52, 13 }, { 53, 13 }, { 54, 13 },
{ 55, 13 }, { 56, 13 }, { 57, 13 }, { 58, 13 }, { 59, 13 },
{ 60, 13 }, { 61, 14 }, { 62, 14 },
/* t_huffman_noise_bal_3_0dB - 25 entries */
{ 12, 1 }, { 11, 2 }, { 13, 3 }, { 10, 5 }, { 14, 6 },
{ 0, 8 }, { 1, 8 }, { 2, 8 }, { 3, 8 }, { 4, 8 },
{ 5, 8 }, { 6, 8 }, { 7, 8 }, { 8, 8 }, { 9, 8 },
{ 15, 8 }, { 16, 8 }, { 17, 8 }, { 18, 8 }, { 19, 8 },
{ 20, 8 }, { 21, 8 }, { 22, 8 }, { 23, 8 }, { 24, 8 },
};
static const uint8_t sbr_huffman_nb_codes[] = {
121, 121, 49, 49, 63, 63, 25, 25, 63, 25
};
static const int8_t sbr_vlc_offsets[10] = {
-60, -60, -24, -24, -31, -31, -12, -12, -31, -12
};
const VLCElem *ff_aac_sbr_vlc[10];
static av_cold void aacdec_common_init(void)
{
static VLCElem vlc_buf[(304 + 270 + 550 + 300 + 328 +
294 + 306 + 268 + 510 + 366 + 462) +
(1098 + 1092 + 768 + 1026 + 1058 +
1052 + 544 + 544 + 592 + 512)];
VLCInitState state = VLC_INIT_STATE(vlc_buf);
const uint8_t (*tab)[2] = sbr_huffman_tab;
for (unsigned i = 0; i < 11; i++) {
#define TAB_WRAP_SIZE(name) name[i], sizeof(name[i][0]), sizeof(name[i][0])
ff_vlc_spectral[i] =
ff_vlc_init_tables_sparse(&state, 8, ff_aac_spectral_sizes[i],
TAB_WRAP_SIZE(ff_aac_spectral_bits),
TAB_WRAP_SIZE(ff_aac_spectral_codes),
TAB_WRAP_SIZE(ff_aac_codebook_vector_idx),
0);
}
VLC_INIT_STATIC_TABLE(ff_vlc_scalefactors, 7,
FF_ARRAY_ELEMS(ff_aac_scalefactor_code),
ff_aac_scalefactor_bits,
sizeof(ff_aac_scalefactor_bits[0]),
sizeof(ff_aac_scalefactor_bits[0]),
ff_aac_scalefactor_code,
sizeof(ff_aac_scalefactor_code[0]),
sizeof(ff_aac_scalefactor_code[0]), 0);
// SBR VLC table initialization
for (int i = 0; i < FF_ARRAY_ELEMS(ff_aac_sbr_vlc); i++) {
ff_aac_sbr_vlc[i] =
ff_vlc_init_tables_from_lengths(&state, 9, sbr_huffman_nb_codes[i],
&tab[0][1], 2,
&tab[0][0], 2, 1,
sbr_vlc_offsets[i], 0);
tab += sbr_huffman_nb_codes[i];
}
ff_ps_init_common();
}
av_cold void ff_aacdec_common_init_once(void)
{
static AVOnce init_static_once = AV_ONCE_INIT;
ff_thread_once(&init_static_once, aacdec_common_init);
}