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https://gitee.com/openharmony/third_party_ffmpeg
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0665199e43
* qatar/master: vorbisdec: Rename silly "class_" variable to plain "class". simple_idct_alpha: Drop some useless casts. Simplify av_log_missing_feature(). ac3enc: remove check for mismatching channels and channel_layout If AVCodecContext.channels is 0 and AVCodecContext.channel_layout is non-zero, set channels based on channel_layout. If AVCodecContext.channel_layout and AVCodecContext.channels are both non-zero, check to make sure they do not contradict eachother. cosmetics: indentation Check AVCodec.supported_samplerates and AVCodec.channel_layouts in avcodec_open(). aacdec: remove sf_scale and sf_offset. aacdec: use a scale of 2 in the LTP MDCT rather than doubling the coefficient table values from the spec. Define POW_SF2_ZERO in aac.h and use for ff_aac_pow2sf_tabp[] offsets instead of hardcoding 200 everywhere. Large intensity stereo and PNS indices are legal. Clip them instead of erroring out. A magnitude of 100 corresponds to 2^25 so the will most likely result in clipped output anyway. qpeg: use reget_buffer() in decode_frame() ultimotion: use reget_buffer() in ulti_decode_frame() smacker: remove unnecessary call to avctx->release_buffer in decode_frame() avparser: don't av_malloc(0). Merged-by: Michael Niedermayer <michaelni@gmx.at>
105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/*
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* AAC decoder data
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* Copyright (c) 2005-2006 Oded Shimon ( ods15 ods15 dyndns org )
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* Copyright (c) 2006-2007 Maxim Gavrilov ( maxim.gavrilov 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 decoder data
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* @author Oded Shimon ( ods15 ods15 dyndns org )
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* @author Maxim Gavrilov ( maxim.gavrilov gmail com )
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*/
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#ifndef AVCODEC_AACDECTAB_H
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#define AVCODEC_AACDECTAB_H
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#include "libavutil/audioconvert.h"
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#include "aac.h"
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#include <stdint.h>
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/* @name ltp_coef
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* Table of the LTP coefficients
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*/
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static const float ltp_coef[8] = {
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0.570829, 0.696616, 0.813004, 0.911304,
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0.984900, 1.067894, 1.194601, 1.369533,
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};
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/* @name tns_tmp2_map
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* Tables of the tmp2[] arrays of LPC coefficients used for TNS.
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* The suffix _M_N[] indicate the values of coef_compress and coef_res
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* respectively.
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* @{
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*/
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static const float tns_tmp2_map_1_3[4] = {
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0.00000000, -0.43388373, 0.64278758, 0.34202015,
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};
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static const float tns_tmp2_map_0_3[8] = {
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0.00000000, -0.43388373, -0.78183150, -0.97492790,
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0.98480773, 0.86602539, 0.64278758, 0.34202015,
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};
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static const float tns_tmp2_map_1_4[8] = {
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0.00000000, -0.20791170, -0.40673664, -0.58778524,
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0.67369562, 0.52643216, 0.36124167, 0.18374951,
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};
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static const float tns_tmp2_map_0_4[16] = {
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0.00000000, -0.20791170, -0.40673664, -0.58778524,
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-0.74314481, -0.86602539, -0.95105654, -0.99452192,
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0.99573416, 0.96182561, 0.89516330, 0.79801720,
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0.67369562, 0.52643216, 0.36124167, 0.18374951,
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};
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static const float * const tns_tmp2_map[4] = {
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tns_tmp2_map_0_3,
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tns_tmp2_map_0_4,
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tns_tmp2_map_1_3,
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tns_tmp2_map_1_4
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};
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// @}
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static const int8_t tags_per_config[16] = { 0, 1, 1, 2, 3, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0 };
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static const uint8_t aac_channel_layout_map[7][5][2] = {
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{ { TYPE_SCE, 0 }, },
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{ { TYPE_CPE, 0 }, },
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{ { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, },
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{ { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_SCE, 1 }, },
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{ { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_CPE, 1 }, },
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{ { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_LFE, 0 }, { TYPE_CPE, 1 }, },
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{ { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_LFE, 0 }, { TYPE_CPE, 2 }, { TYPE_CPE, 1 }, },
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};
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static const int64_t aac_channel_layout[8] = {
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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_WIDE,
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0,
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};
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#endif /* AVCODEC_AACDECTAB_H */
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