2008-08-14 08:52:29 +03:00
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/*
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* AAC encoder
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* Copyright (C) 2008 Konstantin Shishkov
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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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2010-04-20 17:45:34 +03:00
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* @file
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2008-08-14 08:52:29 +03:00
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* AAC encoder
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*/
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/***********************************
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* TODOs:
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2008-08-16 08:47:18 +03:00
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* add sane pulse detection
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2008-08-14 08:52:29 +03:00
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***********************************/
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2021-05-28 21:37:26 +02:00
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#include <float.h>
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2008-08-14 08:52:29 +03:00
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2021-06-12 01:10:58 +02:00
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#include "libavutil/channel_layout.h"
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2016-01-15 00:55:56 +02:00
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#include "libavutil/libm.h"
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2012-05-21 19:58:41 +03:00
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#include "libavutil/float_dsp.h"
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2011-06-01 08:38:09 +03:00
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#include "libavutil/opt.h"
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2008-08-14 08:52:29 +03:00
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#include "avcodec.h"
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2022-03-16 19:18:28 +02:00
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#include "codec_internal.h"
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2021-05-11 15:17:13 +02:00
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#include "encode.h"
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2009-07-08 23:01:31 +03:00
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#include "put_bits.h"
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2008-08-14 08:52:29 +03:00
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#include "mpeg4audio.h"
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2011-03-20 01:44:00 +02:00
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#include "sinewin.h"
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2020-05-10 20:38:11 +02:00
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#include "profiles.h"
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2022-02-23 12:55:45 +02:00
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#include "version.h"
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2008-08-14 08:52:29 +03:00
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#include "aac.h"
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#include "aactab.h"
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2009-07-08 23:01:31 +03:00
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#include "aacenc.h"
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2015-07-29 06:44:26 +02:00
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#include "aacenctab.h"
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2015-07-29 06:44:27 +02:00
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#include "aacenc_utils.h"
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2009-07-08 23:01:31 +03:00
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#include "psymodel.h"
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2008-08-14 08:52:29 +03:00
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2022-08-01 05:42:06 +02:00
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/**
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* List of PCE (Program Configuration Element) for the channel layouts listed
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* in channel_layout.h
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*
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* For those wishing in the future to add other layouts:
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*
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* - num_ele: number of elements in each group of front, side, back, lfe channels
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* (an element is of type SCE (single channel), CPE (channel pair) for
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* the first 3 groups; and is LFE for LFE group).
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*
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* - pairing: 0 for an SCE element or 1 for a CPE; does not apply to LFE group
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*
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* - index: there are three independent indices for SCE, CPE and LFE;
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* they are incremented irrespective of the group to which the element belongs;
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* they are not reset when going from one group to another
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*
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* Example: for 7.0 channel layout,
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* .pairing = { { 1, 0 }, { 1 }, { 1 }, }, (3 CPE and 1 SCE in front group)
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* .index = { { 0, 0 }, { 1 }, { 2 }, },
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* (index is 0 for the single SCE but goes from 0 to 2 for the CPEs)
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*
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* The index order impacts the channel ordering. But is otherwise arbitrary
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* (the sequence could have been 2, 0, 1 instead of 0, 1, 2).
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*
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* Spec allows for discontinuous indices, e.g. if one has a total of two SCE,
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* SCE.0 SCE.15 is OK per spec; BUT it won't be decoded by our AAC decoder
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* which at this time requires that indices fully cover some range starting
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* from 0 (SCE.1 SCE.0 is OK but not SCE.0 SCE.15).
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*
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* - config_map: total number of elements and their types. Beware, the way the
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* types are ordered impacts the final channel ordering.
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*
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* - reorder_map: reorders the channels.
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*
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*/
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static const AACPCEInfo aac_pce_configs[] = {
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{
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.layout = AV_CHANNEL_LAYOUT_MONO,
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.num_ele = { 1, 0, 0, 0 },
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.pairing = { { 0 }, },
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.index = { { 0 }, },
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.config_map = { 1, TYPE_SCE, },
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.reorder_map = { 0 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_STEREO,
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.num_ele = { 1, 0, 0, 0 },
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.pairing = { { 1 }, },
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.index = { { 0 }, },
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.config_map = { 1, TYPE_CPE, },
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.reorder_map = { 0, 1 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_2POINT1,
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.num_ele = { 1, 0, 0, 1 },
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.pairing = { { 1 }, },
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.index = { { 0 },{ 0 },{ 0 },{ 0 } },
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.config_map = { 2, TYPE_CPE, TYPE_LFE },
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.reorder_map = { 0, 1, 2 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_2_1,
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.num_ele = { 1, 0, 1, 0 },
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.pairing = { { 1 },{ 0 },{ 0 } },
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.index = { { 0 },{ 0 },{ 0 }, },
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.config_map = { 2, TYPE_CPE, TYPE_SCE },
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.reorder_map = { 0, 1, 2 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_SURROUND,
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.num_ele = { 2, 0, 0, 0 },
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.pairing = { { 1, 0 }, },
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.index = { { 0, 0 }, },
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.config_map = { 2, TYPE_CPE, TYPE_SCE, },
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.reorder_map = { 0, 1, 2 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_3POINT1,
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.num_ele = { 2, 0, 0, 1 },
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.pairing = { { 1, 0 }, },
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.index = { { 0, 0 }, { 0 }, { 0 }, { 0 }, },
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.config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_LFE },
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.reorder_map = { 0, 1, 2, 3 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_4POINT0,
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.num_ele = { 2, 0, 1, 0 },
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.pairing = { { 1, 0 }, { 0 }, { 0 }, },
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.index = { { 0, 0 }, { 0 }, { 1 } },
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.config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_SCE },
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.reorder_map = { 0, 1, 2, 3 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_4POINT1,
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.num_ele = { 2, 1, 1, 0 },
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.pairing = { { 1, 0 }, { 0 }, { 0 }, },
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.index = { { 0, 0 }, { 1 }, { 2 }, { 0 } },
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.config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_SCE },
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.reorder_map = { 0, 1, 2, 3, 4 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_2_2,
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.num_ele = { 1, 1, 0, 0 },
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.pairing = { { 1 }, { 1 }, },
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.index = { { 0 }, { 1 }, },
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.config_map = { 2, TYPE_CPE, TYPE_CPE },
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.reorder_map = { 0, 1, 2, 3 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_QUAD,
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.num_ele = { 1, 0, 1, 0 },
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.pairing = { { 1 }, { 0 }, { 1 }, },
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.index = { { 0 }, { 0 }, { 1 } },
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.config_map = { 2, TYPE_CPE, TYPE_CPE },
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.reorder_map = { 0, 1, 2, 3 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_5POINT0,
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.num_ele = { 2, 1, 0, 0 },
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.pairing = { { 1, 0 }, { 1 }, },
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.index = { { 0, 0 }, { 1 } },
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.config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_CPE },
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.reorder_map = { 0, 1, 2, 3, 4 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_5POINT1,
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.num_ele = { 2, 1, 1, 0 },
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.pairing = { { 1, 0 }, { 0 }, { 1 }, },
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.index = { { 0, 0 }, { 1 }, { 1 } },
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.config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE },
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.reorder_map = { 0, 1, 2, 3, 4, 5 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_5POINT0_BACK,
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.num_ele = { 2, 0, 1, 0 },
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.pairing = { { 1, 0 }, { 0 }, { 1 } },
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.index = { { 0, 0 }, { 0 }, { 1 } },
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.config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_CPE },
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.reorder_map = { 0, 1, 2, 3, 4 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_5POINT1_BACK,
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.num_ele = { 2, 1, 1, 0 },
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.pairing = { { 1, 0 }, { 0 }, { 1 }, },
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.index = { { 0, 0 }, { 1 }, { 1 } },
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.config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE },
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.reorder_map = { 0, 1, 2, 3, 4, 5 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_6POINT0,
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.num_ele = { 2, 1, 1, 0 },
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.pairing = { { 1, 0 }, { 1 }, { 0 }, },
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.index = { { 0, 0 }, { 1 }, { 1 } },
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.config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
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.reorder_map = { 0, 1, 2, 3, 4, 5 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_6POINT0_FRONT,
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.num_ele = { 2, 1, 0, 0 },
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.pairing = { { 1, 1 }, { 1 } },
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.index = { { 1, 0 }, { 2 }, },
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.config_map = { 3, TYPE_CPE, TYPE_CPE, TYPE_CPE, },
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.reorder_map = { 0, 1, 2, 3, 4, 5 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_HEXAGONAL,
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.num_ele = { 2, 0, 2, 0 },
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.pairing = { { 1, 0 },{ 0 },{ 1, 0 }, },
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.index = { { 0, 0 },{ 0 },{ 1, 1 } },
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.config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE, },
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.reorder_map = { 0, 1, 2, 3, 4, 5 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_6POINT1,
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.num_ele = { 2, 1, 2, 0 },
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.pairing = { { 1, 0 },{ 0 },{ 1, 0 }, },
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.index = { { 0, 0 },{ 1 },{ 1, 2 } },
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.config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
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.reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_6POINT1_BACK,
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.num_ele = { 2, 1, 2, 0 },
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.pairing = { { 1, 0 }, { 0 }, { 1, 0 }, },
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.index = { { 0, 0 }, { 1 }, { 1, 2 } },
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.config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
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.reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_6POINT1_FRONT,
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.num_ele = { 2, 1, 2, 0 },
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.pairing = { { 1, 0 }, { 0 }, { 1, 0 }, },
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.index = { { 0, 0 }, { 1 }, { 1, 2 } },
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.config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
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.reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_7POINT0,
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.num_ele = { 2, 1, 1, 0 },
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.pairing = { { 1, 0 }, { 1 }, { 1 }, },
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.index = { { 0, 0 }, { 1 }, { 2 }, },
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.config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
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.reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_7POINT0_FRONT,
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.num_ele = { 2, 1, 1, 0 },
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.pairing = { { 1, 0 }, { 1 }, { 1 }, },
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.index = { { 0, 0 }, { 1 }, { 2 }, },
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.config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
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.reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_7POINT1,
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.num_ele = { 2, 1, 2, 0 },
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.pairing = { { 1, 0 }, { 0 }, { 1, 1 }, },
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.index = { { 0, 0 }, { 1 }, { 1, 2 }, { 0 } },
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.config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
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.reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_7POINT1_WIDE,
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.num_ele = { 2, 1, 2, 0 },
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.pairing = { { 1, 0 }, { 0 },{ 1, 1 }, },
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.index = { { 0, 0 }, { 1 }, { 1, 2 }, { 0 } },
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.config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
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.reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_7POINT1_WIDE_BACK,
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.num_ele = { 2, 1, 2, 0 },
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.pairing = { { 1, 0 }, { 0 }, { 1, 1 }, },
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.index = { { 0, 0 }, { 1 }, { 1, 2 }, { 0 } },
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.config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
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.reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
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},
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{
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.layout = AV_CHANNEL_LAYOUT_OCTAGONAL,
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.num_ele = { 2, 1, 2, 0 },
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.pairing = { { 1, 0 }, { 1 }, { 1, 0 }, },
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.index = { { 0, 0 }, { 1 }, { 2, 1 } },
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.config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_SCE },
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.reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
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},
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{ /* Meant for order 2/mixed ambisonics */
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|
|
.layout = { .order = AV_CHANNEL_ORDER_NATIVE, .nb_channels = 9,
|
|
|
|
.u.mask = AV_CH_LAYOUT_OCTAGONAL | AV_CH_TOP_CENTER },
|
|
|
|
.num_ele = { 2, 2, 2, 0 },
|
|
|
|
.pairing = { { 1, 0 }, { 1, 0 }, { 1, 0 }, },
|
|
|
|
.index = { { 0, 0 }, { 1, 1 }, { 2, 2 } },
|
|
|
|
.config_map = { 6, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
|
|
|
|
.reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8 },
|
|
|
|
},
|
|
|
|
{ /* Meant for order 2/mixed ambisonics */
|
|
|
|
.layout = { .order = AV_CHANNEL_ORDER_NATIVE, .nb_channels = 10,
|
|
|
|
.u.mask = AV_CH_LAYOUT_6POINT0_FRONT | AV_CH_BACK_CENTER |
|
|
|
|
AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | AV_CH_TOP_CENTER },
|
|
|
|
.num_ele = { 2, 2, 2, 0 },
|
|
|
|
.pairing = { { 1, 1 }, { 1, 0 }, { 1, 0 }, },
|
|
|
|
.index = { { 0, 1 }, { 2, 0 }, { 3, 1 } },
|
|
|
|
.config_map = { 6, TYPE_CPE, TYPE_CPE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
|
|
|
|
.reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.layout = AV_CHANNEL_LAYOUT_HEXADECAGONAL,
|
|
|
|
.num_ele = { 4, 2, 4, 0 },
|
|
|
|
.pairing = { { 1, 0, 1, 0 }, { 1, 1 }, { 1, 0, 1, 0 }, },
|
|
|
|
.index = { { 0, 0, 1, 1 }, { 2, 3 }, { 4, 2, 5, 3 } },
|
|
|
|
.config_map = { 10, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
|
|
|
|
.reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2016-10-03 20:53:11 +02:00
|
|
|
static void put_pce(PutBitContext *pb, AVCodecContext *avctx)
|
|
|
|
{
|
|
|
|
int i, j;
|
|
|
|
AACEncContext *s = avctx->priv_data;
|
|
|
|
AACPCEInfo *pce = &s->pce;
|
2017-11-09 06:30:07 +02:00
|
|
|
const int bitexact = avctx->flags & AV_CODEC_FLAG_BITEXACT;
|
|
|
|
const char *aux_data = bitexact ? "Lavc" : LIBAVCODEC_IDENT;
|
2016-10-03 20:53:11 +02:00
|
|
|
|
|
|
|
put_bits(pb, 4, 0);
|
|
|
|
|
|
|
|
put_bits(pb, 2, avctx->profile);
|
|
|
|
put_bits(pb, 4, s->samplerate_index);
|
|
|
|
|
|
|
|
put_bits(pb, 4, pce->num_ele[0]); /* Front */
|
|
|
|
put_bits(pb, 4, pce->num_ele[1]); /* Side */
|
|
|
|
put_bits(pb, 4, pce->num_ele[2]); /* Back */
|
|
|
|
put_bits(pb, 2, pce->num_ele[3]); /* LFE */
|
|
|
|
put_bits(pb, 3, 0); /* Assoc data */
|
|
|
|
put_bits(pb, 4, 0); /* CCs */
|
|
|
|
|
|
|
|
put_bits(pb, 1, 0); /* Stereo mixdown */
|
|
|
|
put_bits(pb, 1, 0); /* Mono mixdown */
|
|
|
|
put_bits(pb, 1, 0); /* Something else */
|
|
|
|
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
|
|
for (j = 0; j < pce->num_ele[i]; j++) {
|
|
|
|
if (i < 3)
|
|
|
|
put_bits(pb, 1, pce->pairing[i][j]);
|
|
|
|
put_bits(pb, 4, pce->index[i][j]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-10-26 14:36:06 +02:00
|
|
|
align_put_bits(pb);
|
2017-11-09 06:30:07 +02:00
|
|
|
put_bits(pb, 8, strlen(aux_data));
|
2020-10-26 14:41:39 +02:00
|
|
|
ff_put_string(pb, aux_data, 0);
|
2016-10-03 20:53:11 +02:00
|
|
|
}
|
|
|
|
|
2008-08-14 08:52:29 +03:00
|
|
|
/**
|
|
|
|
* Make AAC audio config object.
|
|
|
|
* @see 1.6.2.1 "Syntax - AudioSpecificConfig"
|
|
|
|
*/
|
2017-11-09 06:30:07 +02:00
|
|
|
static int put_audio_specific_config(AVCodecContext *avctx)
|
2008-08-14 08:52:29 +03:00
|
|
|
{
|
|
|
|
PutBitContext pb;
|
|
|
|
AACEncContext *s = avctx->priv_data;
|
2016-10-03 20:53:11 +02:00
|
|
|
int channels = (!s->needs_pce)*(s->channels - (s->channels == 8 ? 1 : 0));
|
2017-11-09 06:30:07 +02:00
|
|
|
const int max_size = 32;
|
2008-08-14 08:52:29 +03:00
|
|
|
|
2017-11-09 06:30:07 +02:00
|
|
|
avctx->extradata = av_mallocz(max_size);
|
|
|
|
if (!avctx->extradata)
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
|
|
|
|
init_put_bits(&pb, avctx->extradata, max_size);
|
2015-08-21 20:20:22 +02:00
|
|
|
put_bits(&pb, 5, s->profile+1); //profile
|
2008-08-14 08:52:29 +03:00
|
|
|
put_bits(&pb, 4, s->samplerate_index); //sample rate index
|
2015-10-12 16:53:17 +02:00
|
|
|
put_bits(&pb, 4, channels);
|
2008-08-14 08:52:29 +03:00
|
|
|
//GASpecificConfig
|
|
|
|
put_bits(&pb, 1, 0); //frame length - 1024 samples
|
|
|
|
put_bits(&pb, 1, 0); //does not depend on core coder
|
|
|
|
put_bits(&pb, 1, 0); //is not extension
|
2016-10-03 20:53:11 +02:00
|
|
|
if (s->needs_pce)
|
|
|
|
put_pce(&pb, avctx);
|
2011-01-22 07:23:43 +02:00
|
|
|
|
|
|
|
//Explicitly Mark SBR absent
|
2011-01-23 16:45:19 +02:00
|
|
|
put_bits(&pb, 11, 0x2b7); //sync extension
|
2011-01-22 07:23:43 +02:00
|
|
|
put_bits(&pb, 5, AOT_SBR);
|
|
|
|
put_bits(&pb, 1, 0);
|
2008-08-14 08:52:29 +03:00
|
|
|
flush_put_bits(&pb);
|
2021-03-25 13:52:56 +02:00
|
|
|
avctx->extradata_size = put_bytes_output(&pb);
|
2017-11-09 06:30:07 +02:00
|
|
|
|
|
|
|
return 0;
|
2008-08-14 08:52:29 +03:00
|
|
|
}
|
|
|
|
|
2015-10-12 08:56:22 +02:00
|
|
|
void ff_quantize_band_cost_cache_init(struct AACEncContext *s)
|
|
|
|
{
|
2016-03-06 18:28:42 +02:00
|
|
|
++s->quantize_band_cost_cache_generation;
|
|
|
|
if (s->quantize_band_cost_cache_generation == 0) {
|
|
|
|
memset(s->quantize_band_cost_cache, 0, sizeof(s->quantize_band_cost_cache));
|
|
|
|
s->quantize_band_cost_cache_generation = 1;
|
2015-10-12 08:56:22 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-12-24 03:36:15 +03:00
|
|
|
#define WINDOW_FUNC(type) \
|
2013-01-21 00:20:30 +03:00
|
|
|
static void apply_ ##type ##_window(AVFloatDSPContext *fdsp, \
|
2012-05-21 19:58:41 +03:00
|
|
|
SingleChannelElement *sce, \
|
|
|
|
const float *audio)
|
2008-08-14 08:52:29 +03:00
|
|
|
|
2011-12-24 03:36:15 +03:00
|
|
|
WINDOW_FUNC(only_long)
|
|
|
|
{
|
|
|
|
const float *lwindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_long_1024 : ff_sine_1024;
|
|
|
|
const float *pwindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_long_1024 : ff_sine_1024;
|
2012-11-26 17:15:02 +03:00
|
|
|
float *out = sce->ret_buf;
|
2009-07-08 23:01:31 +03:00
|
|
|
|
2013-01-21 00:20:30 +03:00
|
|
|
fdsp->vector_fmul (out, audio, lwindow, 1024);
|
|
|
|
fdsp->vector_fmul_reverse(out + 1024, audio + 1024, pwindow, 1024);
|
2011-12-24 03:36:15 +03:00
|
|
|
}
|
2009-07-08 23:01:31 +03:00
|
|
|
|
2011-12-24 03:36:15 +03:00
|
|
|
WINDOW_FUNC(long_start)
|
|
|
|
{
|
|
|
|
const float *lwindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_long_1024 : ff_sine_1024;
|
|
|
|
const float *swindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128;
|
2012-11-26 17:15:02 +03:00
|
|
|
float *out = sce->ret_buf;
|
2011-12-24 03:36:15 +03:00
|
|
|
|
2012-05-21 19:58:41 +03:00
|
|
|
fdsp->vector_fmul(out, audio, lwindow, 1024);
|
2012-01-28 08:23:41 +03:00
|
|
|
memcpy(out + 1024, audio + 1024, sizeof(out[0]) * 448);
|
2013-01-21 00:20:30 +03:00
|
|
|
fdsp->vector_fmul_reverse(out + 1024 + 448, audio + 1024 + 448, swindow, 128);
|
2011-12-24 03:36:15 +03:00
|
|
|
memset(out + 1024 + 576, 0, sizeof(out[0]) * 448);
|
|
|
|
}
|
2010-06-23 22:30:01 +03:00
|
|
|
|
2011-12-24 03:36:15 +03:00
|
|
|
WINDOW_FUNC(long_stop)
|
|
|
|
{
|
|
|
|
const float *lwindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_long_1024 : ff_sine_1024;
|
|
|
|
const float *swindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_short_128 : ff_sine_128;
|
2012-11-26 17:15:02 +03:00
|
|
|
float *out = sce->ret_buf;
|
2011-12-24 03:36:15 +03:00
|
|
|
|
|
|
|
memset(out, 0, sizeof(out[0]) * 448);
|
2012-05-21 19:58:41 +03:00
|
|
|
fdsp->vector_fmul(out + 448, audio + 448, swindow, 128);
|
2011-12-24 03:36:15 +03:00
|
|
|
memcpy(out + 576, audio + 576, sizeof(out[0]) * 448);
|
2013-01-21 00:20:30 +03:00
|
|
|
fdsp->vector_fmul_reverse(out + 1024, audio + 1024, lwindow, 1024);
|
2011-12-24 03:36:15 +03:00
|
|
|
}
|
2009-07-08 23:01:31 +03:00
|
|
|
|
2011-12-24 03:36:15 +03:00
|
|
|
WINDOW_FUNC(eight_short)
|
|
|
|
{
|
|
|
|
const float *swindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128;
|
|
|
|
const float *pwindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_short_128 : ff_sine_128;
|
|
|
|
const float *in = audio + 448;
|
2012-11-26 17:15:02 +03:00
|
|
|
float *out = sce->ret_buf;
|
2012-01-29 23:55:10 +03:00
|
|
|
int w;
|
2011-12-24 03:36:15 +03:00
|
|
|
|
2012-01-29 23:55:10 +03:00
|
|
|
for (w = 0; w < 8; w++) {
|
2013-01-21 00:20:30 +03:00
|
|
|
fdsp->vector_fmul (out, in, w ? pwindow : swindow, 128);
|
2011-12-24 03:36:15 +03:00
|
|
|
out += 128;
|
|
|
|
in += 128;
|
2013-01-21 00:20:30 +03:00
|
|
|
fdsp->vector_fmul_reverse(out, in, swindow, 128);
|
2011-12-24 03:36:15 +03:00
|
|
|
out += 128;
|
|
|
|
}
|
2008-08-14 08:52:29 +03:00
|
|
|
}
|
|
|
|
|
2013-01-21 00:20:30 +03:00
|
|
|
static void (*const apply_window[4])(AVFloatDSPContext *fdsp,
|
2012-05-21 19:58:41 +03:00
|
|
|
SingleChannelElement *sce,
|
|
|
|
const float *audio) = {
|
2011-12-24 03:36:15 +03:00
|
|
|
[ONLY_LONG_SEQUENCE] = apply_only_long_window,
|
|
|
|
[LONG_START_SEQUENCE] = apply_long_start_window,
|
|
|
|
[EIGHT_SHORT_SEQUENCE] = apply_eight_short_window,
|
|
|
|
[LONG_STOP_SEQUENCE] = apply_long_stop_window
|
|
|
|
};
|
|
|
|
|
2011-12-08 01:20:10 +03:00
|
|
|
static void apply_window_and_mdct(AACEncContext *s, SingleChannelElement *sce,
|
|
|
|
float *audio)
|
2009-07-08 23:01:31 +03:00
|
|
|
{
|
2011-12-24 03:36:15 +03:00
|
|
|
int i;
|
2016-01-13 17:40:22 +02:00
|
|
|
const float *output = sce->ret_buf;
|
2009-07-08 23:01:31 +03:00
|
|
|
|
2014-11-29 19:58:13 +02:00
|
|
|
apply_window[sce->ics.window_sequence[0]](s->fdsp, sce, audio);
|
2011-12-24 03:36:15 +03:00
|
|
|
|
|
|
|
if (sce->ics.window_sequence[0] != EIGHT_SHORT_SEQUENCE)
|
2011-03-19 17:14:17 +02:00
|
|
|
s->mdct1024.mdct_calc(&s->mdct1024, sce->coeffs, output);
|
2011-12-24 03:36:15 +03:00
|
|
|
else
|
|
|
|
for (i = 0; i < 1024; i += 128)
|
2015-08-21 19:30:51 +02:00
|
|
|
s->mdct128.mdct_calc(&s->mdct128, &sce->coeffs[i], output + i*2);
|
2011-12-24 03:36:15 +03:00
|
|
|
memcpy(audio, audio + 1024, sizeof(audio[0]) * 1024);
|
2015-03-03 08:43:06 +02:00
|
|
|
memcpy(sce->pcoeffs, sce->coeffs, sizeof(sce->pcoeffs));
|
2009-07-08 23:01:31 +03:00
|
|
|
}
|
|
|
|
|
2008-08-14 08:52:29 +03:00
|
|
|
/**
|
|
|
|
* Encode ics_info element.
|
|
|
|
* @see Table 4.6 (syntax of ics_info)
|
|
|
|
*/
|
2008-08-24 08:56:23 +03:00
|
|
|
static void put_ics_info(AACEncContext *s, IndividualChannelStream *info)
|
2008-08-14 08:52:29 +03:00
|
|
|
{
|
2009-07-08 23:01:31 +03:00
|
|
|
int w;
|
2008-08-14 08:52:29 +03:00
|
|
|
|
|
|
|
put_bits(&s->pb, 1, 0); // ics_reserved bit
|
|
|
|
put_bits(&s->pb, 2, info->window_sequence[0]);
|
|
|
|
put_bits(&s->pb, 1, info->use_kb_window[0]);
|
2009-07-08 23:36:45 +03:00
|
|
|
if (info->window_sequence[0] != EIGHT_SHORT_SEQUENCE) {
|
2008-08-14 08:52:29 +03:00
|
|
|
put_bits(&s->pb, 6, info->max_sfb);
|
2015-08-21 20:38:05 +02:00
|
|
|
put_bits(&s->pb, 1, !!info->predictor_present);
|
2009-07-08 23:36:45 +03:00
|
|
|
} else {
|
2008-08-14 08:52:29 +03:00
|
|
|
put_bits(&s->pb, 4, info->max_sfb);
|
2009-07-09 00:36:33 +03:00
|
|
|
for (w = 1; w < 8; w++)
|
2009-07-08 23:01:31 +03:00
|
|
|
put_bits(&s->pb, 1, !info->group_len[w]);
|
2008-08-14 08:52:29 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-08-24 08:56:23 +03:00
|
|
|
/**
|
2009-07-08 23:01:31 +03:00
|
|
|
* Encode MS data.
|
|
|
|
* @see 4.6.8.1 "Joint Coding - M/S Stereo"
|
2008-08-24 08:56:23 +03:00
|
|
|
*/
|
2009-07-08 23:01:31 +03:00
|
|
|
static void encode_ms_info(PutBitContext *pb, ChannelElement *cpe)
|
2008-08-24 08:56:23 +03:00
|
|
|
{
|
|
|
|
int i, w;
|
2009-07-08 23:01:31 +03:00
|
|
|
|
|
|
|
put_bits(pb, 2, cpe->ms_mode);
|
2009-07-09 00:36:33 +03:00
|
|
|
if (cpe->ms_mode == 1)
|
|
|
|
for (w = 0; w < cpe->ch[0].ics.num_windows; w += cpe->ch[0].ics.group_len[w])
|
2009-07-08 23:36:45 +03:00
|
|
|
for (i = 0; i < cpe->ch[0].ics.max_sfb; i++)
|
2009-07-08 23:01:31 +03:00
|
|
|
put_bits(pb, 1, cpe->ms_mask[w*16 + i]);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Produce integer coefficients from scalefactors provided by the model.
|
|
|
|
*/
|
2012-10-24 20:16:08 +03:00
|
|
|
static void adjust_frame_information(ChannelElement *cpe, int chans)
|
2009-07-08 23:01:31 +03:00
|
|
|
{
|
|
|
|
int i, w, w2, g, ch;
|
2015-07-02 20:13:06 +02:00
|
|
|
int maxsfb, cmaxsfb;
|
|
|
|
|
|
|
|
for (ch = 0; ch < chans; ch++) {
|
|
|
|
IndividualChannelStream *ics = &cpe->ch[ch].ics;
|
|
|
|
maxsfb = 0;
|
|
|
|
cpe->ch[ch].pulse.num_pulse = 0;
|
|
|
|
for (w = 0; w < ics->num_windows; w += ics->group_len[w]) {
|
|
|
|
for (w2 = 0; w2 < ics->group_len[w]; w2++) {
|
2015-03-03 08:43:06 +02:00
|
|
|
for (cmaxsfb = ics->num_swb; cmaxsfb > 0 && cpe->ch[ch].zeroes[w*16+cmaxsfb-1]; cmaxsfb--)
|
|
|
|
;
|
|
|
|
maxsfb = FFMAX(maxsfb, cmaxsfb);
|
2009-07-08 23:01:31 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
ics->max_sfb = maxsfb;
|
|
|
|
|
|
|
|
//adjust zero bands for window groups
|
2009-07-08 23:36:45 +03:00
|
|
|
for (w = 0; w < ics->num_windows; w += ics->group_len[w]) {
|
|
|
|
for (g = 0; g < ics->max_sfb; g++) {
|
2009-07-08 23:01:31 +03:00
|
|
|
i = 1;
|
2009-07-08 23:36:45 +03:00
|
|
|
for (w2 = w; w2 < w + ics->group_len[w]; w2++) {
|
|
|
|
if (!cpe->ch[ch].zeroes[w2*16 + g]) {
|
2009-07-08 23:01:31 +03:00
|
|
|
i = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
cpe->ch[ch].zeroes[w*16 + g] = i;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-07-08 23:36:45 +03:00
|
|
|
if (chans > 1 && cpe->common_window) {
|
2009-07-08 23:01:31 +03:00
|
|
|
IndividualChannelStream *ics0 = &cpe->ch[0].ics;
|
|
|
|
IndividualChannelStream *ics1 = &cpe->ch[1].ics;
|
|
|
|
int msc = 0;
|
|
|
|
ics0->max_sfb = FFMAX(ics0->max_sfb, ics1->max_sfb);
|
|
|
|
ics1->max_sfb = ics0->max_sfb;
|
2009-07-08 23:36:45 +03:00
|
|
|
for (w = 0; w < ics0->num_windows*16; w += 16)
|
|
|
|
for (i = 0; i < ics0->max_sfb; i++)
|
2009-07-09 00:36:33 +03:00
|
|
|
if (cpe->ms_mask[w+i])
|
|
|
|
msc++;
|
2009-07-09 00:16:06 +03:00
|
|
|
if (msc == 0 || ics0->max_sfb == 0)
|
|
|
|
cpe->ms_mode = 0;
|
|
|
|
else
|
2011-06-29 06:11:39 +03:00
|
|
|
cpe->ms_mode = msc < ics0->max_sfb * ics0->num_windows ? 1 : 2;
|
2009-07-08 23:01:31 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-09-02 07:26:45 +02:00
|
|
|
static void apply_intensity_stereo(ChannelElement *cpe)
|
|
|
|
{
|
|
|
|
int w, w2, g, i;
|
|
|
|
IndividualChannelStream *ics = &cpe->ch[0].ics;
|
|
|
|
if (!cpe->common_window)
|
|
|
|
return;
|
|
|
|
for (w = 0; w < ics->num_windows; w += ics->group_len[w]) {
|
|
|
|
for (w2 = 0; w2 < ics->group_len[w]; w2++) {
|
|
|
|
int start = (w+w2) * 128;
|
|
|
|
for (g = 0; g < ics->num_swb; g++) {
|
|
|
|
int p = -1 + 2 * (cpe->ch[1].band_type[w*16+g] - 14);
|
|
|
|
float scale = cpe->ch[0].is_ener[w*16+g];
|
|
|
|
if (!cpe->is_mask[w*16 + g]) {
|
|
|
|
start += ics->swb_sizes[g];
|
|
|
|
continue;
|
|
|
|
}
|
AAC encoder: Extensive improvements
This finalizes merging of the work in the patches in ticket #2686.
Improvements to twoloop and RC logic are extensive.
The non-exhaustive list of twoloop improvments includes:
- Tweaks to distortion limits on the RD optimization phase of twoloop
- Deeper search in twoloop
- PNS information marking to let twoloop decide when to use it
(turned out having the decision made separately wasn't working)
- Tonal band detection and priorization
- Better band energy conservation rules
- Strict hole avoidance
For rate control:
- Use psymodel's bit allocation to allow proper use of the bit
reservoir. Don't work against the bit reservoir by moving lambda
in the opposite direction when psymodel decides to allocate more/less
bits to a frame.
- Retry the encode if the effective rate lies outside a reasonable
margin of psymodel's allocation or the selected ABR.
- Log average lambda at the end. Useful info for everyone, but especially
for tuning of the various encoder constants that relate to lambda
feedback.
Psy:
- Do not apply lowpass with a FIR filter, instead just let the coder
zero bands above the cutoff. The FIR filter induces group delay,
and while zeroing bands causes ripple, it's lost in the quantization
noise.
- Experimental VBR bit allocation code
- Tweak automatic lowpass filter threshold to maximize audio bandwidth
at all bitrates while still providing acceptable, stable quality.
I/S:
- Phase decision fixes. Unrelated to #2686, but the bugs only surfaced
when the merge was finalized. Measure I/S band energy accounting for
phase, and prevent I/S and M/S from being applied both.
PNS:
- Avoid marking short bands with PNS when they're part of a window
group in which there's a large variation of energy from one window
to the next. PNS can't preserve those and the effect is extremely
noticeable.
M/S:
- Implement BMLD protection similar to the specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Since M/S decision
doesn't conform to section 6.1, a different method had to be
implemented, but should provide equivalent protection.
- Move the decision logic closer to the method specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Specifically,
make sure M/S needs less bits than dual stereo.
- Don't apply M/S in bands that are using I/S
Now, this of course needed adjustments in the compare targets and
fuzz factors of the AAC encoder's fate tests, but if wondering why
the targets go up (more distortion), consider the previous coder
was using too many bits on LF content (far more than required by
psy), and thus those signals will now be more distorted, not less.
The extra distortion isn't audible though, I carried extensive
ABX testing to make sure.
A very similar patch was also extensively tested by Kamendo2 in
the context of #2686.
2015-10-11 22:29:50 +02:00
|
|
|
if (cpe->ms_mask[w*16 + g])
|
|
|
|
p *= -1;
|
2015-09-02 07:26:45 +02:00
|
|
|
for (i = 0; i < ics->swb_sizes[g]; i++) {
|
|
|
|
float sum = (cpe->ch[0].coeffs[start+i] + p*cpe->ch[1].coeffs[start+i])*scale;
|
|
|
|
cpe->ch[0].coeffs[start+i] = sum;
|
|
|
|
cpe->ch[1].coeffs[start+i] = 0.0f;
|
|
|
|
}
|
|
|
|
start += ics->swb_sizes[g];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void apply_mid_side_stereo(ChannelElement *cpe)
|
|
|
|
{
|
|
|
|
int w, w2, g, i;
|
|
|
|
IndividualChannelStream *ics = &cpe->ch[0].ics;
|
|
|
|
if (!cpe->common_window)
|
|
|
|
return;
|
|
|
|
for (w = 0; w < ics->num_windows; w += ics->group_len[w]) {
|
|
|
|
for (w2 = 0; w2 < ics->group_len[w]; w2++) {
|
|
|
|
int start = (w+w2) * 128;
|
|
|
|
for (g = 0; g < ics->num_swb; g++) {
|
2015-11-26 08:27:06 +02:00
|
|
|
/* ms_mask can be used for other purposes in PNS and I/S,
|
|
|
|
* so must not apply M/S if any band uses either, even if
|
|
|
|
* ms_mask is set.
|
|
|
|
*/
|
|
|
|
if (!cpe->ms_mask[w*16 + g] || cpe->is_mask[w*16 + g]
|
2016-01-08 10:04:37 +02:00
|
|
|
|| cpe->ch[0].band_type[w*16 + g] >= NOISE_BT
|
|
|
|
|| cpe->ch[1].band_type[w*16 + g] >= NOISE_BT) {
|
2015-09-02 07:26:45 +02:00
|
|
|
start += ics->swb_sizes[g];
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
for (i = 0; i < ics->swb_sizes[g]; i++) {
|
|
|
|
float L = (cpe->ch[0].coeffs[start+i] + cpe->ch[1].coeffs[start+i]) * 0.5f;
|
|
|
|
float R = L - cpe->ch[1].coeffs[start+i];
|
|
|
|
cpe->ch[0].coeffs[start+i] = L;
|
|
|
|
cpe->ch[1].coeffs[start+i] = R;
|
|
|
|
}
|
|
|
|
start += ics->swb_sizes[g];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-07-08 23:01:31 +03:00
|
|
|
/**
|
|
|
|
* Encode scalefactor band coding type.
|
|
|
|
*/
|
|
|
|
static void encode_band_info(AACEncContext *s, SingleChannelElement *sce)
|
|
|
|
{
|
|
|
|
int w;
|
|
|
|
|
2015-09-02 07:26:45 +02:00
|
|
|
if (s->coder->set_special_band_scalefactors)
|
|
|
|
s->coder->set_special_band_scalefactors(s, sce);
|
|
|
|
|
2009-07-09 00:36:33 +03:00
|
|
|
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w])
|
2009-07-08 23:01:31 +03:00
|
|
|
s->coder->encode_window_bands_info(s, sce, w, sce->ics.group_len[w], s->lambda);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Encode scalefactors.
|
|
|
|
*/
|
2009-07-09 00:16:06 +03:00
|
|
|
static void encode_scale_factors(AVCodecContext *avctx, AACEncContext *s,
|
|
|
|
SingleChannelElement *sce)
|
2009-07-08 23:01:31 +03:00
|
|
|
{
|
2015-04-14 01:33:51 +02:00
|
|
|
int diff, off_sf = sce->sf_idx[0], off_pns = sce->sf_idx[0] - NOISE_OFFSET;
|
2015-06-26 22:16:34 +02:00
|
|
|
int off_is = 0, noise_flag = 1;
|
2009-07-08 23:01:31 +03:00
|
|
|
int i, w;
|
|
|
|
|
2009-07-08 23:36:45 +03:00
|
|
|
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
|
|
|
|
for (i = 0; i < sce->ics.max_sfb; i++) {
|
|
|
|
if (!sce->zeroes[w*16 + i]) {
|
2015-04-12 06:50:34 +02:00
|
|
|
if (sce->band_type[w*16 + i] == NOISE_BT) {
|
|
|
|
diff = sce->sf_idx[w*16 + i] - off_pns;
|
|
|
|
off_pns = sce->sf_idx[w*16 + i];
|
|
|
|
if (noise_flag-- > 0) {
|
|
|
|
put_bits(&s->pb, NOISE_PRE_BITS, diff + NOISE_PRE);
|
|
|
|
continue;
|
|
|
|
}
|
2015-06-26 22:16:34 +02:00
|
|
|
} else if (sce->band_type[w*16 + i] == INTENSITY_BT ||
|
|
|
|
sce->band_type[w*16 + i] == INTENSITY_BT2) {
|
|
|
|
diff = sce->sf_idx[w*16 + i] - off_is;
|
|
|
|
off_is = sce->sf_idx[w*16 + i];
|
2015-04-12 06:50:34 +02:00
|
|
|
} else {
|
|
|
|
diff = sce->sf_idx[w*16 + i] - off_sf;
|
|
|
|
off_sf = sce->sf_idx[w*16 + i];
|
|
|
|
}
|
|
|
|
diff += SCALE_DIFF_ZERO;
|
2012-10-26 03:11:20 +03:00
|
|
|
av_assert0(diff >= 0 && diff <= 120);
|
2009-07-08 23:01:31 +03:00
|
|
|
put_bits(&s->pb, ff_aac_scalefactor_bits[diff], ff_aac_scalefactor_code[diff]);
|
|
|
|
}
|
2008-08-24 08:56:23 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-08-16 08:47:18 +03:00
|
|
|
/**
|
|
|
|
* Encode pulse data.
|
|
|
|
*/
|
2008-08-23 18:25:57 +03:00
|
|
|
static void encode_pulses(AACEncContext *s, Pulse *pulse)
|
2008-08-16 08:47:18 +03:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
put_bits(&s->pb, 1, !!pulse->num_pulse);
|
2009-07-09 00:16:06 +03:00
|
|
|
if (!pulse->num_pulse)
|
|
|
|
return;
|
2008-08-16 08:47:18 +03:00
|
|
|
|
|
|
|
put_bits(&s->pb, 2, pulse->num_pulse - 1);
|
|
|
|
put_bits(&s->pb, 6, pulse->start);
|
2009-07-08 23:36:45 +03:00
|
|
|
for (i = 0; i < pulse->num_pulse; i++) {
|
2008-08-16 14:59:36 +03:00
|
|
|
put_bits(&s->pb, 5, pulse->pos[i]);
|
2008-08-16 08:47:18 +03:00
|
|
|
put_bits(&s->pb, 4, pulse->amp[i]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Encode spectral coefficients processed by psychoacoustic model.
|
|
|
|
*/
|
2008-08-23 18:25:57 +03:00
|
|
|
static void encode_spectral_coeffs(AACEncContext *s, SingleChannelElement *sce)
|
2008-08-16 08:47:18 +03:00
|
|
|
{
|
2009-07-08 23:01:31 +03:00
|
|
|
int start, i, w, w2;
|
2008-08-16 08:47:18 +03:00
|
|
|
|
2009-07-08 23:36:45 +03:00
|
|
|
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
|
2008-08-16 08:47:18 +03:00
|
|
|
start = 0;
|
2009-07-08 23:36:45 +03:00
|
|
|
for (i = 0; i < sce->ics.max_sfb; i++) {
|
|
|
|
if (sce->zeroes[w*16 + i]) {
|
2008-08-23 18:25:57 +03:00
|
|
|
start += sce->ics.swb_sizes[i];
|
2008-08-16 08:47:18 +03:00
|
|
|
continue;
|
|
|
|
}
|
2015-08-29 07:34:08 +02:00
|
|
|
for (w2 = w; w2 < w + sce->ics.group_len[w]; w2++) {
|
2015-08-21 19:53:14 +02:00
|
|
|
s->coder->quantize_and_encode_band(s, &s->pb,
|
|
|
|
&sce->coeffs[start + w2*128],
|
2015-08-29 07:34:08 +02:00
|
|
|
NULL, sce->ics.swb_sizes[i],
|
2009-07-09 00:16:06 +03:00
|
|
|
sce->sf_idx[w*16 + i],
|
|
|
|
sce->band_type[w*16 + i],
|
2015-08-21 19:53:14 +02:00
|
|
|
s->lambda,
|
|
|
|
sce->ics.window_clipping[w]);
|
2015-08-29 07:34:08 +02:00
|
|
|
}
|
2008-08-23 18:25:57 +03:00
|
|
|
start += sce->ics.swb_sizes[i];
|
2008-08-16 08:47:18 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-07-21 03:53:24 +02:00
|
|
|
/**
|
|
|
|
* Downscale spectral coefficients for near-clipping windows to avoid artifacts
|
|
|
|
*/
|
|
|
|
static void avoid_clipping(AACEncContext *s, SingleChannelElement *sce)
|
|
|
|
{
|
|
|
|
int start, i, j, w;
|
|
|
|
|
|
|
|
if (sce->ics.clip_avoidance_factor < 1.0f) {
|
|
|
|
for (w = 0; w < sce->ics.num_windows; w++) {
|
|
|
|
start = 0;
|
|
|
|
for (i = 0; i < sce->ics.max_sfb; i++) {
|
2015-08-21 19:30:51 +02:00
|
|
|
float *swb_coeffs = &sce->coeffs[start + w*128];
|
2015-07-21 03:53:24 +02:00
|
|
|
for (j = 0; j < sce->ics.swb_sizes[i]; j++)
|
|
|
|
swb_coeffs[j] *= sce->ics.clip_avoidance_factor;
|
|
|
|
start += sce->ics.swb_sizes[i];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-07-08 23:01:31 +03:00
|
|
|
/**
|
|
|
|
* Encode one channel of audio data.
|
|
|
|
*/
|
2009-07-09 00:16:06 +03:00
|
|
|
static int encode_individual_channel(AVCodecContext *avctx, AACEncContext *s,
|
|
|
|
SingleChannelElement *sce,
|
|
|
|
int common_window)
|
2009-07-08 23:01:31 +03:00
|
|
|
{
|
|
|
|
put_bits(&s->pb, 8, sce->sf_idx[0]);
|
2015-08-21 20:38:05 +02:00
|
|
|
if (!common_window) {
|
2009-07-09 00:16:06 +03:00
|
|
|
put_ics_info(s, &sce->ics);
|
2015-08-21 20:38:05 +02:00
|
|
|
if (s->coder->encode_main_pred)
|
|
|
|
s->coder->encode_main_pred(s, sce);
|
2015-10-17 03:22:51 +02:00
|
|
|
if (s->coder->encode_ltp_info)
|
|
|
|
s->coder->encode_ltp_info(s, sce, 0);
|
2015-08-21 20:38:05 +02:00
|
|
|
}
|
2009-07-08 23:01:31 +03:00
|
|
|
encode_band_info(s, sce);
|
|
|
|
encode_scale_factors(avctx, s, sce);
|
|
|
|
encode_pulses(s, &sce->pulse);
|
2015-08-29 07:47:31 +02:00
|
|
|
put_bits(&s->pb, 1, !!sce->tns.present);
|
2015-08-21 20:27:38 +02:00
|
|
|
if (s->coder->encode_tns_info)
|
|
|
|
s->coder->encode_tns_info(s, sce);
|
2009-07-08 23:01:31 +03:00
|
|
|
put_bits(&s->pb, 1, 0); //ssr
|
|
|
|
encode_spectral_coeffs(s, sce);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-08-14 08:52:29 +03:00
|
|
|
/**
|
|
|
|
* Write some auxiliary information about the created AAC file.
|
|
|
|
*/
|
2012-10-24 20:16:08 +03:00
|
|
|
static void put_bitstream_info(AACEncContext *s, const char *name)
|
2008-08-14 08:52:29 +03:00
|
|
|
{
|
|
|
|
int i, namelen, padbits;
|
|
|
|
|
|
|
|
namelen = strlen(name) + 2;
|
2008-08-16 14:59:36 +03:00
|
|
|
put_bits(&s->pb, 3, TYPE_FIL);
|
2008-08-14 08:52:29 +03:00
|
|
|
put_bits(&s->pb, 4, FFMIN(namelen, 15));
|
2009-07-08 23:36:45 +03:00
|
|
|
if (namelen >= 15)
|
2012-01-22 03:40:10 +03:00
|
|
|
put_bits(&s->pb, 8, namelen - 14);
|
2008-08-14 08:52:29 +03:00
|
|
|
put_bits(&s->pb, 4, 0); //extension type - filler
|
2012-01-24 00:08:32 +03:00
|
|
|
padbits = -put_bits_count(&s->pb) & 7;
|
2020-10-26 14:36:06 +02:00
|
|
|
align_put_bits(&s->pb);
|
2009-07-08 23:36:45 +03:00
|
|
|
for (i = 0; i < namelen - 2; i++)
|
2008-08-14 08:52:29 +03:00
|
|
|
put_bits(&s->pb, 8, name[i]);
|
|
|
|
put_bits(&s->pb, 12 - padbits, 0);
|
|
|
|
}
|
|
|
|
|
2011-12-15 05:43:56 +03:00
|
|
|
/*
|
2012-08-25 20:04:33 +03:00
|
|
|
* Copy input samples.
|
2012-02-01 05:46:11 +03:00
|
|
|
* Channels are reordered from libavcodec's default order to AAC order.
|
2011-12-15 05:43:56 +03:00
|
|
|
*/
|
2012-08-25 20:04:33 +03:00
|
|
|
static void copy_input_samples(AACEncContext *s, const AVFrame *frame)
|
2011-12-15 05:43:56 +03:00
|
|
|
{
|
2012-08-25 20:04:33 +03:00
|
|
|
int ch;
|
|
|
|
int end = 2048 + (frame ? frame->nb_samples : 0);
|
2016-10-03 20:53:11 +02:00
|
|
|
const uint8_t *channel_map = s->reorder_map;
|
2011-12-15 05:43:56 +03:00
|
|
|
|
2012-08-25 20:04:33 +03:00
|
|
|
/* copy and remap input samples */
|
|
|
|
for (ch = 0; ch < s->channels; ch++) {
|
2011-12-15 05:43:56 +03:00
|
|
|
/* copy last 1024 samples of previous frame to the start of the current frame */
|
2012-01-28 08:23:40 +03:00
|
|
|
memcpy(&s->planar_samples[ch][1024], &s->planar_samples[ch][2048], 1024 * sizeof(s->planar_samples[0][0]));
|
2011-12-15 05:43:56 +03:00
|
|
|
|
2012-08-25 20:04:33 +03:00
|
|
|
/* copy new samples and zero any remaining samples */
|
2012-01-28 20:28:01 +03:00
|
|
|
if (frame) {
|
2012-08-25 20:04:33 +03:00
|
|
|
memcpy(&s->planar_samples[ch][2048],
|
|
|
|
frame->extended_data[channel_map[ch]],
|
|
|
|
frame->nb_samples * sizeof(s->planar_samples[0][0]));
|
2011-12-15 05:43:56 +03:00
|
|
|
}
|
2012-08-25 20:04:33 +03:00
|
|
|
memset(&s->planar_samples[ch][end], 0,
|
|
|
|
(3072 - end) * sizeof(s->planar_samples[0][0]));
|
2011-12-15 05:43:56 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-01-28 20:28:01 +03:00
|
|
|
static int aac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
|
|
|
|
const AVFrame *frame, int *got_packet_ptr)
|
2009-07-08 23:01:31 +03:00
|
|
|
{
|
|
|
|
AACEncContext *s = avctx->priv_data;
|
2011-12-25 01:24:16 +03:00
|
|
|
float **samples = s->planar_samples, *samples2, *la, *overlap;
|
2009-07-08 23:01:31 +03:00
|
|
|
ChannelElement *cpe;
|
2015-08-21 20:13:26 +02:00
|
|
|
SingleChannelElement *sce;
|
2015-10-17 03:13:00 +02:00
|
|
|
IndividualChannelStream *ics;
|
2015-09-23 07:13:56 +02:00
|
|
|
int i, its, ch, w, chans, tag, start_ch, ret, frame_bits;
|
AAC encoder: Extensive improvements
This finalizes merging of the work in the patches in ticket #2686.
Improvements to twoloop and RC logic are extensive.
The non-exhaustive list of twoloop improvments includes:
- Tweaks to distortion limits on the RD optimization phase of twoloop
- Deeper search in twoloop
- PNS information marking to let twoloop decide when to use it
(turned out having the decision made separately wasn't working)
- Tonal band detection and priorization
- Better band energy conservation rules
- Strict hole avoidance
For rate control:
- Use psymodel's bit allocation to allow proper use of the bit
reservoir. Don't work against the bit reservoir by moving lambda
in the opposite direction when psymodel decides to allocate more/less
bits to a frame.
- Retry the encode if the effective rate lies outside a reasonable
margin of psymodel's allocation or the selected ABR.
- Log average lambda at the end. Useful info for everyone, but especially
for tuning of the various encoder constants that relate to lambda
feedback.
Psy:
- Do not apply lowpass with a FIR filter, instead just let the coder
zero bands above the cutoff. The FIR filter induces group delay,
and while zeroing bands causes ripple, it's lost in the quantization
noise.
- Experimental VBR bit allocation code
- Tweak automatic lowpass filter threshold to maximize audio bandwidth
at all bitrates while still providing acceptable, stable quality.
I/S:
- Phase decision fixes. Unrelated to #2686, but the bugs only surfaced
when the merge was finalized. Measure I/S band energy accounting for
phase, and prevent I/S and M/S from being applied both.
PNS:
- Avoid marking short bands with PNS when they're part of a window
group in which there's a large variation of energy from one window
to the next. PNS can't preserve those and the effect is extremely
noticeable.
M/S:
- Implement BMLD protection similar to the specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Since M/S decision
doesn't conform to section 6.1, a different method had to be
implemented, but should provide equivalent protection.
- Move the decision logic closer to the method specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Specifically,
make sure M/S needs less bits than dual stereo.
- Don't apply M/S in bands that are using I/S
Now, this of course needed adjustments in the compare targets and
fuzz factors of the AAC encoder's fate tests, but if wondering why
the targets go up (more distortion), consider the previous coder
was using too many bits on LF content (far more than required by
psy), and thus those signals will now be more distorted, not less.
The extra distortion isn't audible though, I carried extensive
ABX testing to make sure.
A very similar patch was also extensively tested by Kamendo2 in
the context of #2686.
2015-10-11 22:29:50 +02:00
|
|
|
int target_bits, rate_bits, too_many_bits, too_few_bits;
|
2015-08-21 20:13:26 +02:00
|
|
|
int ms_mode = 0, is_mode = 0, tns_mode = 0, pred_mode = 0;
|
2009-07-08 23:01:31 +03:00
|
|
|
int chan_el_counter[4];
|
2010-07-06 03:06:15 +03:00
|
|
|
FFPsyWindowInfo windows[AAC_MAX_CHANNELS];
|
2009-07-08 23:01:31 +03:00
|
|
|
|
2012-01-28 20:28:01 +03:00
|
|
|
/* add current frame to queue */
|
|
|
|
if (frame) {
|
2013-01-14 02:02:50 +03:00
|
|
|
if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
|
2012-01-28 20:28:01 +03:00
|
|
|
return ret;
|
2016-11-07 04:11:50 +02:00
|
|
|
} else {
|
|
|
|
if (!s->afq.remaining_samples || (!s->afq.frame_alloc && !s->afq.frame_count))
|
|
|
|
return 0;
|
2012-01-28 20:28:01 +03:00
|
|
|
}
|
|
|
|
|
2012-08-25 20:04:33 +03:00
|
|
|
copy_input_samples(s, frame);
|
2012-01-29 01:51:22 +03:00
|
|
|
if (s->psypp)
|
|
|
|
ff_psy_preprocess(s->psypp, s->planar_samples, s->channels);
|
2011-12-15 05:43:56 +03:00
|
|
|
|
|
|
|
if (!avctx->frame_number)
|
2009-07-08 23:01:31 +03:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
start_ch = 0;
|
2011-06-20 07:29:37 +03:00
|
|
|
for (i = 0; i < s->chan_map[0]; i++) {
|
2009-07-09 02:10:13 +03:00
|
|
|
FFPsyWindowInfo* wi = windows + start_ch;
|
2011-06-20 07:29:37 +03:00
|
|
|
tag = s->chan_map[i+1];
|
2009-07-09 00:16:06 +03:00
|
|
|
chans = tag == TYPE_CPE ? 2 : 1;
|
|
|
|
cpe = &s->cpe[i];
|
2011-05-06 10:19:51 +03:00
|
|
|
for (ch = 0; ch < chans; ch++) {
|
2016-01-20 16:05:38 +02:00
|
|
|
int k;
|
2015-10-17 13:40:04 +02:00
|
|
|
float clip_avoidance_factor;
|
2015-10-17 03:13:00 +02:00
|
|
|
sce = &cpe->ch[ch];
|
|
|
|
ics = &sce->ics;
|
|
|
|
s->cur_channel = start_ch + ch;
|
|
|
|
overlap = &samples[s->cur_channel][0];
|
2011-12-25 01:24:16 +03:00
|
|
|
samples2 = overlap + 1024;
|
2011-12-15 05:43:56 +03:00
|
|
|
la = samples2 + (448+64);
|
2012-01-28 20:28:01 +03:00
|
|
|
if (!frame)
|
2010-07-19 21:22:44 +03:00
|
|
|
la = NULL;
|
2010-07-08 00:48:51 +03:00
|
|
|
if (tag == TYPE_LFE) {
|
2016-04-06 04:13:44 +02:00
|
|
|
wi[ch].window_type[0] = wi[ch].window_type[1] = ONLY_LONG_SEQUENCE;
|
2011-05-06 10:19:51 +03:00
|
|
|
wi[ch].window_shape = 0;
|
|
|
|
wi[ch].num_windows = 1;
|
|
|
|
wi[ch].grouping[0] = 1;
|
2016-04-06 04:13:44 +02:00
|
|
|
wi[ch].clipping[0] = 0;
|
2011-07-29 23:49:04 +03:00
|
|
|
|
|
|
|
/* Only the lowest 12 coefficients are used in a LFE channel.
|
|
|
|
* The expression below results in only the bottom 8 coefficients
|
|
|
|
* being used for 11.025kHz to 16kHz sample rates.
|
|
|
|
*/
|
|
|
|
ics->num_swb = s->samplerate_index >= 8 ? 1 : 3;
|
2010-07-08 00:48:51 +03:00
|
|
|
} else {
|
2015-10-17 03:13:00 +02:00
|
|
|
wi[ch] = s->psy.model->window(&s->psy, samples2, la, s->cur_channel,
|
2010-07-08 00:50:50 +03:00
|
|
|
ics->window_sequence[0]);
|
2010-07-08 00:48:51 +03:00
|
|
|
}
|
2009-07-08 23:01:31 +03:00
|
|
|
ics->window_sequence[1] = ics->window_sequence[0];
|
2011-05-06 10:19:51 +03:00
|
|
|
ics->window_sequence[0] = wi[ch].window_type[0];
|
2009-07-08 23:01:31 +03:00
|
|
|
ics->use_kb_window[1] = ics->use_kb_window[0];
|
2011-05-06 10:19:51 +03:00
|
|
|
ics->use_kb_window[0] = wi[ch].window_shape;
|
|
|
|
ics->num_windows = wi[ch].num_windows;
|
2009-07-08 23:01:31 +03:00
|
|
|
ics->swb_sizes = s->psy.bands [ics->num_windows == 8];
|
2011-07-29 23:49:04 +03:00
|
|
|
ics->num_swb = tag == TYPE_LFE ? ics->num_swb : s->psy.num_bands[ics->num_windows == 8];
|
2015-12-06 22:35:08 +02:00
|
|
|
ics->max_sfb = FFMIN(ics->max_sfb, ics->num_swb);
|
2015-08-21 19:40:44 +02:00
|
|
|
ics->swb_offset = wi[ch].window_type[0] == EIGHT_SHORT_SEQUENCE ?
|
|
|
|
ff_swb_offset_128 [s->samplerate_index]:
|
|
|
|
ff_swb_offset_1024[s->samplerate_index];
|
2015-09-01 07:20:24 +02:00
|
|
|
ics->tns_max_bands = wi[ch].window_type[0] == EIGHT_SHORT_SEQUENCE ?
|
|
|
|
ff_tns_max_bands_128 [s->samplerate_index]:
|
|
|
|
ff_tns_max_bands_1024[s->samplerate_index];
|
2016-04-06 04:13:44 +02:00
|
|
|
|
2011-05-06 10:19:51 +03:00
|
|
|
for (w = 0; w < ics->num_windows; w++)
|
|
|
|
ics->group_len[w] = wi[ch].grouping[w];
|
2016-04-06 04:13:44 +02:00
|
|
|
|
|
|
|
/* Calculate input sample maximums and evaluate clipping risk */
|
|
|
|
clip_avoidance_factor = 0.0f;
|
|
|
|
for (w = 0; w < ics->num_windows; w++) {
|
|
|
|
const float *wbuf = overlap + w * 128;
|
|
|
|
const int wlen = 2048 / ics->num_windows;
|
|
|
|
float max = 0;
|
|
|
|
int j;
|
|
|
|
/* mdct input is 2 * output */
|
|
|
|
for (j = 0; j < wlen; j++)
|
|
|
|
max = FFMAX(max, fabsf(wbuf[j]));
|
|
|
|
wi[ch].clipping[w] = max;
|
|
|
|
}
|
2015-07-21 03:53:24 +02:00
|
|
|
for (w = 0; w < ics->num_windows; w++) {
|
|
|
|
if (wi[ch].clipping[w] > CLIP_AVOIDANCE_FACTOR) {
|
|
|
|
ics->window_clipping[w] = 1;
|
|
|
|
clip_avoidance_factor = FFMAX(clip_avoidance_factor, wi[ch].clipping[w]);
|
|
|
|
} else {
|
|
|
|
ics->window_clipping[w] = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (clip_avoidance_factor > CLIP_AVOIDANCE_FACTOR) {
|
|
|
|
ics->clip_avoidance_factor = CLIP_AVOIDANCE_FACTOR / clip_avoidance_factor;
|
|
|
|
} else {
|
|
|
|
ics->clip_avoidance_factor = 1.0f;
|
|
|
|
}
|
2009-07-08 23:01:31 +03:00
|
|
|
|
2015-10-17 03:13:00 +02:00
|
|
|
apply_window_and_mdct(s, sce, overlap);
|
2015-10-17 03:22:51 +02:00
|
|
|
|
|
|
|
if (s->options.ltp && s->coder->update_ltp) {
|
|
|
|
s->coder->update_ltp(s, sce);
|
|
|
|
apply_window[sce->ics.window_sequence[0]](s->fdsp, sce, &sce->ltp_state[0]);
|
|
|
|
s->mdct1024.mdct_calc(&s->mdct1024, sce->lcoeffs, sce->ret_buf);
|
|
|
|
}
|
|
|
|
|
2016-01-20 16:05:38 +02:00
|
|
|
for (k = 0; k < 1024; k++) {
|
2016-08-23 11:00:29 +02:00
|
|
|
if (!(fabs(cpe->ch[ch].coeffs[k]) < 1E16)) { // Ensure headroom for energy calculation
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Input contains (near) NaN/+-Inf\n");
|
2016-01-20 16:05:38 +02:00
|
|
|
return AVERROR(EINVAL);
|
|
|
|
}
|
2014-11-09 00:32:39 +02:00
|
|
|
}
|
2015-10-17 03:13:00 +02:00
|
|
|
avoid_clipping(s, sce);
|
2009-07-09 02:10:13 +03:00
|
|
|
}
|
|
|
|
start_ch += chans;
|
|
|
|
}
|
2021-05-11 15:17:13 +02:00
|
|
|
if ((ret = ff_alloc_packet(avctx, avpkt, 8192 * s->channels)) < 0)
|
2012-04-06 16:25:05 +03:00
|
|
|
return ret;
|
2015-09-23 07:13:56 +02:00
|
|
|
frame_bits = its = 0;
|
2009-07-09 02:12:53 +03:00
|
|
|
do {
|
2012-01-28 20:28:01 +03:00
|
|
|
init_put_bits(&s->pb, avpkt->data, avpkt->size);
|
|
|
|
|
2015-06-29 21:59:37 +02:00
|
|
|
if ((avctx->frame_number & 0xFF)==1 && !(avctx->flags & AV_CODEC_FLAG_BITEXACT))
|
2012-10-24 20:16:08 +03:00
|
|
|
put_bitstream_info(s, LIBAVCODEC_IDENT);
|
2009-07-09 02:14:47 +03:00
|
|
|
start_ch = 0;
|
2015-09-23 07:13:56 +02:00
|
|
|
target_bits = 0;
|
2009-07-09 02:14:47 +03:00
|
|
|
memset(chan_el_counter, 0, sizeof(chan_el_counter));
|
2011-06-20 07:29:37 +03:00
|
|
|
for (i = 0; i < s->chan_map[0]; i++) {
|
2009-07-09 02:14:47 +03:00
|
|
|
FFPsyWindowInfo* wi = windows + start_ch;
|
2011-05-19 08:14:59 +03:00
|
|
|
const float *coeffs[2];
|
2011-06-20 07:29:37 +03:00
|
|
|
tag = s->chan_map[i+1];
|
2009-07-09 02:14:47 +03:00
|
|
|
chans = tag == TYPE_CPE ? 2 : 1;
|
|
|
|
cpe = &s->cpe[i];
|
2015-09-01 08:00:10 +02:00
|
|
|
cpe->common_window = 0;
|
2015-07-02 20:13:03 +02:00
|
|
|
memset(cpe->is_mask, 0, sizeof(cpe->is_mask));
|
|
|
|
memset(cpe->ms_mask, 0, sizeof(cpe->ms_mask));
|
2010-08-31 02:52:03 +03:00
|
|
|
put_bits(&s->pb, 3, tag);
|
|
|
|
put_bits(&s->pb, 4, chan_el_counter[tag]++);
|
2015-08-21 19:36:09 +02:00
|
|
|
for (ch = 0; ch < chans; ch++) {
|
|
|
|
sce = &cpe->ch[ch];
|
|
|
|
coeffs[ch] = sce->coeffs;
|
2015-08-21 20:38:05 +02:00
|
|
|
sce->ics.predictor_present = 0;
|
2015-10-17 03:22:51 +02:00
|
|
|
sce->ics.ltp.present = 0;
|
|
|
|
memset(sce->ics.ltp.used, 0, sizeof(sce->ics.ltp.used));
|
2015-10-17 03:14:10 +02:00
|
|
|
memset(sce->ics.prediction_used, 0, sizeof(sce->ics.prediction_used));
|
2015-08-21 20:27:38 +02:00
|
|
|
memset(&sce->tns, 0, sizeof(TemporalNoiseShaping));
|
2015-08-21 19:36:09 +02:00
|
|
|
for (w = 0; w < 128; w++)
|
|
|
|
if (sce->band_type[w] > RESERVED_BT)
|
|
|
|
sce->band_type[w] = 0;
|
|
|
|
}
|
2015-09-23 07:13:56 +02:00
|
|
|
s->psy.bitres.alloc = -1;
|
2015-12-18 16:27:13 +02:00
|
|
|
s->psy.bitres.bits = s->last_frame_pb_count / s->channels;
|
2011-05-19 08:23:22 +03:00
|
|
|
s->psy.model->analyze(&s->psy, start_ch, coeffs, wi);
|
2015-09-23 07:13:56 +02:00
|
|
|
if (s->psy.bitres.alloc > 0) {
|
|
|
|
/* Lambda unused here on purpose, we need to take psy's unscaled allocation */
|
AAC encoder: Extensive improvements
This finalizes merging of the work in the patches in ticket #2686.
Improvements to twoloop and RC logic are extensive.
The non-exhaustive list of twoloop improvments includes:
- Tweaks to distortion limits on the RD optimization phase of twoloop
- Deeper search in twoloop
- PNS information marking to let twoloop decide when to use it
(turned out having the decision made separately wasn't working)
- Tonal band detection and priorization
- Better band energy conservation rules
- Strict hole avoidance
For rate control:
- Use psymodel's bit allocation to allow proper use of the bit
reservoir. Don't work against the bit reservoir by moving lambda
in the opposite direction when psymodel decides to allocate more/less
bits to a frame.
- Retry the encode if the effective rate lies outside a reasonable
margin of psymodel's allocation or the selected ABR.
- Log average lambda at the end. Useful info for everyone, but especially
for tuning of the various encoder constants that relate to lambda
feedback.
Psy:
- Do not apply lowpass with a FIR filter, instead just let the coder
zero bands above the cutoff. The FIR filter induces group delay,
and while zeroing bands causes ripple, it's lost in the quantization
noise.
- Experimental VBR bit allocation code
- Tweak automatic lowpass filter threshold to maximize audio bandwidth
at all bitrates while still providing acceptable, stable quality.
I/S:
- Phase decision fixes. Unrelated to #2686, but the bugs only surfaced
when the merge was finalized. Measure I/S band energy accounting for
phase, and prevent I/S and M/S from being applied both.
PNS:
- Avoid marking short bands with PNS when they're part of a window
group in which there's a large variation of energy from one window
to the next. PNS can't preserve those and the effect is extremely
noticeable.
M/S:
- Implement BMLD protection similar to the specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Since M/S decision
doesn't conform to section 6.1, a different method had to be
implemented, but should provide equivalent protection.
- Move the decision logic closer to the method specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Specifically,
make sure M/S needs less bits than dual stereo.
- Don't apply M/S in bands that are using I/S
Now, this of course needed adjustments in the compare targets and
fuzz factors of the AAC encoder's fate tests, but if wondering why
the targets go up (more distortion), consider the previous coder
was using too many bits on LF content (far more than required by
psy), and thus those signals will now be more distorted, not less.
The extra distortion isn't audible though, I carried extensive
ABX testing to make sure.
A very similar patch was also extensively tested by Kamendo2 in
the context of #2686.
2015-10-11 22:29:50 +02:00
|
|
|
target_bits += s->psy.bitres.alloc
|
|
|
|
* (s->lambda / (avctx->global_quality ? avctx->global_quality : 120));
|
2015-09-23 07:13:56 +02:00
|
|
|
s->psy.bitres.alloc /= chans;
|
|
|
|
}
|
|
|
|
s->cur_type = tag;
|
2011-05-06 10:19:51 +03:00
|
|
|
for (ch = 0; ch < chans; ch++) {
|
2013-05-12 10:38:40 +03:00
|
|
|
s->cur_channel = start_ch + ch;
|
AAC encoder: Extensive improvements
This finalizes merging of the work in the patches in ticket #2686.
Improvements to twoloop and RC logic are extensive.
The non-exhaustive list of twoloop improvments includes:
- Tweaks to distortion limits on the RD optimization phase of twoloop
- Deeper search in twoloop
- PNS information marking to let twoloop decide when to use it
(turned out having the decision made separately wasn't working)
- Tonal band detection and priorization
- Better band energy conservation rules
- Strict hole avoidance
For rate control:
- Use psymodel's bit allocation to allow proper use of the bit
reservoir. Don't work against the bit reservoir by moving lambda
in the opposite direction when psymodel decides to allocate more/less
bits to a frame.
- Retry the encode if the effective rate lies outside a reasonable
margin of psymodel's allocation or the selected ABR.
- Log average lambda at the end. Useful info for everyone, but especially
for tuning of the various encoder constants that relate to lambda
feedback.
Psy:
- Do not apply lowpass with a FIR filter, instead just let the coder
zero bands above the cutoff. The FIR filter induces group delay,
and while zeroing bands causes ripple, it's lost in the quantization
noise.
- Experimental VBR bit allocation code
- Tweak automatic lowpass filter threshold to maximize audio bandwidth
at all bitrates while still providing acceptable, stable quality.
I/S:
- Phase decision fixes. Unrelated to #2686, but the bugs only surfaced
when the merge was finalized. Measure I/S band energy accounting for
phase, and prevent I/S and M/S from being applied both.
PNS:
- Avoid marking short bands with PNS when they're part of a window
group in which there's a large variation of energy from one window
to the next. PNS can't preserve those and the effect is extremely
noticeable.
M/S:
- Implement BMLD protection similar to the specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Since M/S decision
doesn't conform to section 6.1, a different method had to be
implemented, but should provide equivalent protection.
- Move the decision logic closer to the method specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Specifically,
make sure M/S needs less bits than dual stereo.
- Don't apply M/S in bands that are using I/S
Now, this of course needed adjustments in the compare targets and
fuzz factors of the AAC encoder's fate tests, but if wondering why
the targets go up (more distortion), consider the previous coder
was using too many bits on LF content (far more than required by
psy), and thus those signals will now be more distorted, not less.
The extra distortion isn't audible though, I carried extensive
ABX testing to make sure.
A very similar patch was also extensively tested by Kamendo2 in
the context of #2686.
2015-10-11 22:29:50 +02:00
|
|
|
if (s->options.pns && s->coder->mark_pns)
|
|
|
|
s->coder->mark_pns(s, avctx, &cpe->ch[ch]);
|
2011-05-06 10:19:51 +03:00
|
|
|
s->coder->search_for_quantizers(avctx, s, &cpe->ch[ch], s->lambda);
|
2009-07-09 02:14:47 +03:00
|
|
|
}
|
|
|
|
if (chans > 1
|
|
|
|
&& wi[0].window_type[0] == wi[1].window_type[0]
|
|
|
|
&& wi[0].window_shape == wi[1].window_shape) {
|
|
|
|
|
|
|
|
cpe->common_window = 1;
|
2011-05-06 10:19:51 +03:00
|
|
|
for (w = 0; w < wi[0].num_windows; w++) {
|
|
|
|
if (wi[0].grouping[w] != wi[1].grouping[w]) {
|
2009-07-09 02:14:47 +03:00
|
|
|
cpe->common_window = 0;
|
|
|
|
break;
|
|
|
|
}
|
2009-07-08 23:01:31 +03:00
|
|
|
}
|
|
|
|
}
|
2015-09-02 07:26:45 +02:00
|
|
|
for (ch = 0; ch < chans; ch++) { /* TNS and PNS */
|
2015-08-21 20:27:38 +02:00
|
|
|
sce = &cpe->ch[ch];
|
|
|
|
s->cur_channel = start_ch + ch;
|
|
|
|
if (s->options.tns && s->coder->search_for_tns)
|
|
|
|
s->coder->search_for_tns(s, sce);
|
2015-08-29 07:47:31 +02:00
|
|
|
if (s->options.tns && s->coder->apply_tns_filt)
|
2015-09-01 07:44:07 +02:00
|
|
|
s->coder->apply_tns_filt(s, sce);
|
2015-08-21 20:27:38 +02:00
|
|
|
if (sce->tns.present)
|
|
|
|
tns_mode = 1;
|
2015-12-06 15:32:40 +02:00
|
|
|
if (s->options.pns && s->coder->search_for_pns)
|
|
|
|
s->coder->search_for_pns(s, avctx, sce);
|
2015-07-02 20:13:05 +02:00
|
|
|
}
|
2013-05-12 10:38:40 +03:00
|
|
|
s->cur_channel = start_ch;
|
2015-09-02 07:26:45 +02:00
|
|
|
if (s->options.intensity_stereo) { /* Intensity Stereo */
|
|
|
|
if (s->coder->search_for_is)
|
|
|
|
s->coder->search_for_is(s, avctx, cpe);
|
2015-07-02 20:13:07 +02:00
|
|
|
if (cpe->is_mode) is_mode = 1;
|
2015-09-02 07:26:45 +02:00
|
|
|
apply_intensity_stereo(cpe);
|
2015-07-02 20:13:07 +02:00
|
|
|
}
|
2015-09-02 07:26:45 +02:00
|
|
|
if (s->options.pred) { /* Prediction */
|
|
|
|
for (ch = 0; ch < chans; ch++) {
|
|
|
|
sce = &cpe->ch[ch];
|
|
|
|
s->cur_channel = start_ch + ch;
|
|
|
|
if (s->options.pred && s->coder->search_for_pred)
|
|
|
|
s->coder->search_for_pred(s, sce);
|
|
|
|
if (cpe->ch[ch].ics.predictor_present) pred_mode = 1;
|
|
|
|
}
|
2015-10-13 00:33:07 +02:00
|
|
|
if (s->coder->adjust_common_pred)
|
|
|
|
s->coder->adjust_common_pred(s, cpe);
|
2015-09-02 07:26:45 +02:00
|
|
|
for (ch = 0; ch < chans; ch++) {
|
|
|
|
sce = &cpe->ch[ch];
|
|
|
|
s->cur_channel = start_ch + ch;
|
|
|
|
if (s->options.pred && s->coder->apply_main_pred)
|
|
|
|
s->coder->apply_main_pred(s, sce);
|
|
|
|
}
|
|
|
|
s->cur_channel = start_ch;
|
2015-08-29 07:34:08 +02:00
|
|
|
}
|
2015-10-12 17:50:10 +02:00
|
|
|
if (s->options.mid_side) { /* Mid/Side stereo */
|
|
|
|
if (s->options.mid_side == -1 && s->coder->search_for_ms)
|
2015-09-02 07:26:45 +02:00
|
|
|
s->coder->search_for_ms(s, cpe);
|
|
|
|
else if (cpe->common_window)
|
|
|
|
memset(cpe->ms_mask, 1, sizeof(cpe->ms_mask));
|
|
|
|
apply_mid_side_stereo(cpe);
|
2015-08-29 07:34:08 +02:00
|
|
|
}
|
2015-09-02 07:26:45 +02:00
|
|
|
adjust_frame_information(cpe, chans);
|
2015-10-17 03:22:51 +02:00
|
|
|
if (s->options.ltp) { /* LTP */
|
|
|
|
for (ch = 0; ch < chans; ch++) {
|
|
|
|
sce = &cpe->ch[ch];
|
|
|
|
s->cur_channel = start_ch + ch;
|
|
|
|
if (s->coder->search_for_ltp)
|
|
|
|
s->coder->search_for_ltp(s, sce, cpe->common_window);
|
|
|
|
if (sce->ics.ltp.present) pred_mode = 1;
|
|
|
|
}
|
|
|
|
s->cur_channel = start_ch;
|
|
|
|
if (s->coder->adjust_common_ltp)
|
|
|
|
s->coder->adjust_common_ltp(s, cpe);
|
|
|
|
}
|
2009-07-09 02:14:47 +03:00
|
|
|
if (chans == 2) {
|
|
|
|
put_bits(&s->pb, 1, cpe->common_window);
|
|
|
|
if (cpe->common_window) {
|
|
|
|
put_ics_info(s, &cpe->ch[0].ics);
|
2015-08-21 20:38:05 +02:00
|
|
|
if (s->coder->encode_main_pred)
|
|
|
|
s->coder->encode_main_pred(s, &cpe->ch[0]);
|
2015-10-17 03:22:51 +02:00
|
|
|
if (s->coder->encode_ltp_info)
|
|
|
|
s->coder->encode_ltp_info(s, &cpe->ch[0], 1);
|
2009-07-09 02:14:47 +03:00
|
|
|
encode_ms_info(&s->pb, cpe);
|
2015-03-03 08:43:06 +02:00
|
|
|
if (cpe->ms_mode) ms_mode = 1;
|
2009-07-09 02:14:47 +03:00
|
|
|
}
|
2009-07-08 23:01:31 +03:00
|
|
|
}
|
2011-05-06 10:19:51 +03:00
|
|
|
for (ch = 0; ch < chans; ch++) {
|
|
|
|
s->cur_channel = start_ch + ch;
|
|
|
|
encode_individual_channel(avctx, s, &cpe->ch[ch], cpe->common_window);
|
2009-07-09 02:14:47 +03:00
|
|
|
}
|
|
|
|
start_ch += chans;
|
2009-07-08 23:01:31 +03:00
|
|
|
}
|
|
|
|
|
2017-03-26 02:35:15 +02:00
|
|
|
if (avctx->flags & AV_CODEC_FLAG_QSCALE) {
|
2015-09-23 07:13:56 +02:00
|
|
|
/* When using a constant Q-scale, don't mess with lambda */
|
2009-07-09 02:12:53 +03:00
|
|
|
break;
|
2011-01-05 10:32:16 +02:00
|
|
|
}
|
2009-07-09 02:12:53 +03:00
|
|
|
|
2015-09-23 07:13:56 +02:00
|
|
|
/* rate control stuff
|
AAC encoder: Extensive improvements
This finalizes merging of the work in the patches in ticket #2686.
Improvements to twoloop and RC logic are extensive.
The non-exhaustive list of twoloop improvments includes:
- Tweaks to distortion limits on the RD optimization phase of twoloop
- Deeper search in twoloop
- PNS information marking to let twoloop decide when to use it
(turned out having the decision made separately wasn't working)
- Tonal band detection and priorization
- Better band energy conservation rules
- Strict hole avoidance
For rate control:
- Use psymodel's bit allocation to allow proper use of the bit
reservoir. Don't work against the bit reservoir by moving lambda
in the opposite direction when psymodel decides to allocate more/less
bits to a frame.
- Retry the encode if the effective rate lies outside a reasonable
margin of psymodel's allocation or the selected ABR.
- Log average lambda at the end. Useful info for everyone, but especially
for tuning of the various encoder constants that relate to lambda
feedback.
Psy:
- Do not apply lowpass with a FIR filter, instead just let the coder
zero bands above the cutoff. The FIR filter induces group delay,
and while zeroing bands causes ripple, it's lost in the quantization
noise.
- Experimental VBR bit allocation code
- Tweak automatic lowpass filter threshold to maximize audio bandwidth
at all bitrates while still providing acceptable, stable quality.
I/S:
- Phase decision fixes. Unrelated to #2686, but the bugs only surfaced
when the merge was finalized. Measure I/S band energy accounting for
phase, and prevent I/S and M/S from being applied both.
PNS:
- Avoid marking short bands with PNS when they're part of a window
group in which there's a large variation of energy from one window
to the next. PNS can't preserve those and the effect is extremely
noticeable.
M/S:
- Implement BMLD protection similar to the specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Since M/S decision
doesn't conform to section 6.1, a different method had to be
implemented, but should provide equivalent protection.
- Move the decision logic closer to the method specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Specifically,
make sure M/S needs less bits than dual stereo.
- Don't apply M/S in bands that are using I/S
Now, this of course needed adjustments in the compare targets and
fuzz factors of the AAC encoder's fate tests, but if wondering why
the targets go up (more distortion), consider the previous coder
was using too many bits on LF content (far more than required by
psy), and thus those signals will now be more distorted, not less.
The extra distortion isn't audible though, I carried extensive
ABX testing to make sure.
A very similar patch was also extensively tested by Kamendo2 in
the context of #2686.
2015-10-11 22:29:50 +02:00
|
|
|
* allow between the nominal bitrate, and what psy's bit reservoir says to target
|
|
|
|
* but drift towards the nominal bitrate always
|
2015-09-23 07:13:56 +02:00
|
|
|
*/
|
|
|
|
frame_bits = put_bits_count(&s->pb);
|
AAC encoder: Extensive improvements
This finalizes merging of the work in the patches in ticket #2686.
Improvements to twoloop and RC logic are extensive.
The non-exhaustive list of twoloop improvments includes:
- Tweaks to distortion limits on the RD optimization phase of twoloop
- Deeper search in twoloop
- PNS information marking to let twoloop decide when to use it
(turned out having the decision made separately wasn't working)
- Tonal band detection and priorization
- Better band energy conservation rules
- Strict hole avoidance
For rate control:
- Use psymodel's bit allocation to allow proper use of the bit
reservoir. Don't work against the bit reservoir by moving lambda
in the opposite direction when psymodel decides to allocate more/less
bits to a frame.
- Retry the encode if the effective rate lies outside a reasonable
margin of psymodel's allocation or the selected ABR.
- Log average lambda at the end. Useful info for everyone, but especially
for tuning of the various encoder constants that relate to lambda
feedback.
Psy:
- Do not apply lowpass with a FIR filter, instead just let the coder
zero bands above the cutoff. The FIR filter induces group delay,
and while zeroing bands causes ripple, it's lost in the quantization
noise.
- Experimental VBR bit allocation code
- Tweak automatic lowpass filter threshold to maximize audio bandwidth
at all bitrates while still providing acceptable, stable quality.
I/S:
- Phase decision fixes. Unrelated to #2686, but the bugs only surfaced
when the merge was finalized. Measure I/S band energy accounting for
phase, and prevent I/S and M/S from being applied both.
PNS:
- Avoid marking short bands with PNS when they're part of a window
group in which there's a large variation of energy from one window
to the next. PNS can't preserve those and the effect is extremely
noticeable.
M/S:
- Implement BMLD protection similar to the specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Since M/S decision
doesn't conform to section 6.1, a different method had to be
implemented, but should provide equivalent protection.
- Move the decision logic closer to the method specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Specifically,
make sure M/S needs less bits than dual stereo.
- Don't apply M/S in bands that are using I/S
Now, this of course needed adjustments in the compare targets and
fuzz factors of the AAC encoder's fate tests, but if wondering why
the targets go up (more distortion), consider the previous coder
was using too many bits on LF content (far more than required by
psy), and thus those signals will now be more distorted, not less.
The extra distortion isn't audible though, I carried extensive
ABX testing to make sure.
A very similar patch was also extensively tested by Kamendo2 in
the context of #2686.
2015-10-11 22:29:50 +02:00
|
|
|
rate_bits = avctx->bit_rate * 1024 / avctx->sample_rate;
|
|
|
|
rate_bits = FFMIN(rate_bits, 6144 * s->channels - 3);
|
|
|
|
too_many_bits = FFMAX(target_bits, rate_bits);
|
|
|
|
too_many_bits = FFMIN(too_many_bits, 6144 * s->channels - 3);
|
|
|
|
too_few_bits = FFMIN(FFMAX(rate_bits - rate_bits/4, target_bits), too_many_bits);
|
2015-09-23 07:13:56 +02:00
|
|
|
|
|
|
|
/* When using ABR, be strict (but only for increasing) */
|
AAC encoder: Extensive improvements
This finalizes merging of the work in the patches in ticket #2686.
Improvements to twoloop and RC logic are extensive.
The non-exhaustive list of twoloop improvments includes:
- Tweaks to distortion limits on the RD optimization phase of twoloop
- Deeper search in twoloop
- PNS information marking to let twoloop decide when to use it
(turned out having the decision made separately wasn't working)
- Tonal band detection and priorization
- Better band energy conservation rules
- Strict hole avoidance
For rate control:
- Use psymodel's bit allocation to allow proper use of the bit
reservoir. Don't work against the bit reservoir by moving lambda
in the opposite direction when psymodel decides to allocate more/less
bits to a frame.
- Retry the encode if the effective rate lies outside a reasonable
margin of psymodel's allocation or the selected ABR.
- Log average lambda at the end. Useful info for everyone, but especially
for tuning of the various encoder constants that relate to lambda
feedback.
Psy:
- Do not apply lowpass with a FIR filter, instead just let the coder
zero bands above the cutoff. The FIR filter induces group delay,
and while zeroing bands causes ripple, it's lost in the quantization
noise.
- Experimental VBR bit allocation code
- Tweak automatic lowpass filter threshold to maximize audio bandwidth
at all bitrates while still providing acceptable, stable quality.
I/S:
- Phase decision fixes. Unrelated to #2686, but the bugs only surfaced
when the merge was finalized. Measure I/S band energy accounting for
phase, and prevent I/S and M/S from being applied both.
PNS:
- Avoid marking short bands with PNS when they're part of a window
group in which there's a large variation of energy from one window
to the next. PNS can't preserve those and the effect is extremely
noticeable.
M/S:
- Implement BMLD protection similar to the specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Since M/S decision
doesn't conform to section 6.1, a different method had to be
implemented, but should provide equivalent protection.
- Move the decision logic closer to the method specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Specifically,
make sure M/S needs less bits than dual stereo.
- Don't apply M/S in bands that are using I/S
Now, this of course needed adjustments in the compare targets and
fuzz factors of the AAC encoder's fate tests, but if wondering why
the targets go up (more distortion), consider the previous coder
was using too many bits on LF content (far more than required by
psy), and thus those signals will now be more distorted, not less.
The extra distortion isn't audible though, I carried extensive
ABX testing to make sure.
A very similar patch was also extensively tested by Kamendo2 in
the context of #2686.
2015-10-11 22:29:50 +02:00
|
|
|
too_few_bits = too_few_bits - too_few_bits/8;
|
|
|
|
too_many_bits = too_many_bits + too_many_bits/2;
|
2015-09-23 07:13:56 +02:00
|
|
|
|
|
|
|
if ( its == 0 /* for steady-state Q-scale tracking */
|
|
|
|
|| (its < 5 && (frame_bits < too_few_bits || frame_bits > too_many_bits))
|
|
|
|
|| frame_bits >= 6144 * s->channels - 3 )
|
|
|
|
{
|
AAC encoder: Extensive improvements
This finalizes merging of the work in the patches in ticket #2686.
Improvements to twoloop and RC logic are extensive.
The non-exhaustive list of twoloop improvments includes:
- Tweaks to distortion limits on the RD optimization phase of twoloop
- Deeper search in twoloop
- PNS information marking to let twoloop decide when to use it
(turned out having the decision made separately wasn't working)
- Tonal band detection and priorization
- Better band energy conservation rules
- Strict hole avoidance
For rate control:
- Use psymodel's bit allocation to allow proper use of the bit
reservoir. Don't work against the bit reservoir by moving lambda
in the opposite direction when psymodel decides to allocate more/less
bits to a frame.
- Retry the encode if the effective rate lies outside a reasonable
margin of psymodel's allocation or the selected ABR.
- Log average lambda at the end. Useful info for everyone, but especially
for tuning of the various encoder constants that relate to lambda
feedback.
Psy:
- Do not apply lowpass with a FIR filter, instead just let the coder
zero bands above the cutoff. The FIR filter induces group delay,
and while zeroing bands causes ripple, it's lost in the quantization
noise.
- Experimental VBR bit allocation code
- Tweak automatic lowpass filter threshold to maximize audio bandwidth
at all bitrates while still providing acceptable, stable quality.
I/S:
- Phase decision fixes. Unrelated to #2686, but the bugs only surfaced
when the merge was finalized. Measure I/S band energy accounting for
phase, and prevent I/S and M/S from being applied both.
PNS:
- Avoid marking short bands with PNS when they're part of a window
group in which there's a large variation of energy from one window
to the next. PNS can't preserve those and the effect is extremely
noticeable.
M/S:
- Implement BMLD protection similar to the specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Since M/S decision
doesn't conform to section 6.1, a different method had to be
implemented, but should provide equivalent protection.
- Move the decision logic closer to the method specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Specifically,
make sure M/S needs less bits than dual stereo.
- Don't apply M/S in bands that are using I/S
Now, this of course needed adjustments in the compare targets and
fuzz factors of the AAC encoder's fate tests, but if wondering why
the targets go up (more distortion), consider the previous coder
was using too many bits on LF content (far more than required by
psy), and thus those signals will now be more distorted, not less.
The extra distortion isn't audible though, I carried extensive
ABX testing to make sure.
A very similar patch was also extensively tested by Kamendo2 in
the context of #2686.
2015-10-11 22:29:50 +02:00
|
|
|
float ratio = ((float)rate_bits) / frame_bits;
|
2015-09-23 07:13:56 +02:00
|
|
|
|
|
|
|
if (frame_bits >= too_few_bits && frame_bits <= too_many_bits) {
|
|
|
|
/*
|
|
|
|
* This path is for steady-state Q-scale tracking
|
|
|
|
* When frame bits fall within the stable range, we still need to adjust
|
|
|
|
* lambda to maintain it like so in a stable fashion (large jumps in lambda
|
|
|
|
* create artifacts and should be avoided), but slowly
|
|
|
|
*/
|
|
|
|
ratio = sqrtf(sqrtf(ratio));
|
|
|
|
ratio = av_clipf(ratio, 0.9f, 1.1f);
|
|
|
|
} else {
|
|
|
|
/* Not so fast though */
|
|
|
|
ratio = sqrtf(ratio);
|
|
|
|
}
|
2021-06-01 10:07:05 +02:00
|
|
|
s->lambda = av_clipf(s->lambda * ratio, FLT_EPSILON, 65536.f);
|
2009-07-09 02:12:53 +03:00
|
|
|
|
2015-09-23 07:13:56 +02:00
|
|
|
/* Keep iterating if we must reduce and lambda is in the sky */
|
AAC encoder: improve SF range utilization
This patch does 4 things, all of which interact and thus it
woudln't be possible to commit them separately without causing
either quality regressions or assertion failures.
Fate comparison targets don't all reflect improvements in
quality, yet listening tests show substantially improved quality
and stability.
1. Increase SF range utilization.
The spec requires SF delta values to be constrained within the
range -60..60. The previous code was applying that range to
the whole SF array and not only the deltas of consecutive values,
because doing so requires smarter code: zeroing or otherwise
skipping a band may invalidate lots of SF choices.
This patch implements that logic to allow the coders to utilize
the full dynamic range of scalefactors, increasing quality quite
considerably, and fixing delta-SF-related assertion failures,
since now the limitation is enforced rather than asserted.
2. PNS tweaks
The previous modification makes big improvements in twoloop's
efficiency, and every time that happens PNS logic needs to be
tweaked accordingly to avoid it from stepping all over twoloop's
decisions. This patch includes modifications of the sort.
3. Account for lowpass cutoff during PSY analysis
The closer PSY's allocation is to final allocation the better
the quality is, and given these modifications, twoloop is now
very efficient at avoiding holes. Thus, to compute accurate
thresholds, PSY needs to account for the lowpass applied
implicitly during twoloop (by zeroing high bands).
This patch makes twoloop set the cutoff in psymodel's context
the first time it runs, and makes PSY account for it during
threshold computation, making PE and threshold computations
closer to the final allocation and thus achieving better
subjective quality.
4. Tweaks to RC lambda tracking loop in relation to PNS
Without this tweak some corner cases cause quality regressions.
Basically, lambda needs to react faster to overall bitrate
efficiency changes since now PNS can be quite successful in
enforcing maximum bitrates, when PSY allocates too many bits
to the lower bands, suppressing the signals RC logic uses to
lower lambda in those cases and causing aggressive PNS.
This tweak makes PNS much less aggressive, though it can still
use some further tweaks.
Also update MIPS specializations and adjust fuzz
Also in lavc/mips/aacpsy_mips.h: remove trailing whitespace
2015-12-01 08:28:36 +02:00
|
|
|
if (ratio > 0.9f && ratio < 1.1f) {
|
2015-09-23 07:13:56 +02:00
|
|
|
break;
|
|
|
|
} else {
|
|
|
|
if (is_mode || ms_mode || tns_mode || pred_mode) {
|
|
|
|
for (i = 0; i < s->chan_map[0]; i++) {
|
|
|
|
// Must restore coeffs
|
|
|
|
chans = tag == TYPE_CPE ? 2 : 1;
|
|
|
|
cpe = &s->cpe[i];
|
|
|
|
for (ch = 0; ch < chans; ch++)
|
|
|
|
memcpy(cpe->ch[ch].coeffs, cpe->ch[ch].pcoeffs, sizeof(cpe->ch[ch].coeffs));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
its++;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
break;
|
|
|
|
}
|
2009-07-09 02:12:53 +03:00
|
|
|
} while (1);
|
|
|
|
|
2015-10-17 03:22:51 +02:00
|
|
|
if (s->options.ltp && s->coder->ltp_insert_new_frame)
|
|
|
|
s->coder->ltp_insert_new_frame(s);
|
|
|
|
|
2009-07-08 23:01:31 +03:00
|
|
|
put_bits(&s->pb, 3, TYPE_END);
|
|
|
|
flush_put_bits(&s->pb);
|
2015-12-18 15:39:15 +02:00
|
|
|
|
2015-12-18 16:27:13 +02:00
|
|
|
s->last_frame_pb_count = put_bits_count(&s->pb);
|
2021-03-25 13:52:56 +02:00
|
|
|
avpkt->size = put_bytes_output(&s->pb);
|
2009-07-08 23:01:31 +03:00
|
|
|
|
AAC encoder: Extensive improvements
This finalizes merging of the work in the patches in ticket #2686.
Improvements to twoloop and RC logic are extensive.
The non-exhaustive list of twoloop improvments includes:
- Tweaks to distortion limits on the RD optimization phase of twoloop
- Deeper search in twoloop
- PNS information marking to let twoloop decide when to use it
(turned out having the decision made separately wasn't working)
- Tonal band detection and priorization
- Better band energy conservation rules
- Strict hole avoidance
For rate control:
- Use psymodel's bit allocation to allow proper use of the bit
reservoir. Don't work against the bit reservoir by moving lambda
in the opposite direction when psymodel decides to allocate more/less
bits to a frame.
- Retry the encode if the effective rate lies outside a reasonable
margin of psymodel's allocation or the selected ABR.
- Log average lambda at the end. Useful info for everyone, but especially
for tuning of the various encoder constants that relate to lambda
feedback.
Psy:
- Do not apply lowpass with a FIR filter, instead just let the coder
zero bands above the cutoff. The FIR filter induces group delay,
and while zeroing bands causes ripple, it's lost in the quantization
noise.
- Experimental VBR bit allocation code
- Tweak automatic lowpass filter threshold to maximize audio bandwidth
at all bitrates while still providing acceptable, stable quality.
I/S:
- Phase decision fixes. Unrelated to #2686, but the bugs only surfaced
when the merge was finalized. Measure I/S band energy accounting for
phase, and prevent I/S and M/S from being applied both.
PNS:
- Avoid marking short bands with PNS when they're part of a window
group in which there's a large variation of energy from one window
to the next. PNS can't preserve those and the effect is extremely
noticeable.
M/S:
- Implement BMLD protection similar to the specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Since M/S decision
doesn't conform to section 6.1, a different method had to be
implemented, but should provide equivalent protection.
- Move the decision logic closer to the method specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Specifically,
make sure M/S needs less bits than dual stereo.
- Don't apply M/S in bands that are using I/S
Now, this of course needed adjustments in the compare targets and
fuzz factors of the AAC encoder's fate tests, but if wondering why
the targets go up (more distortion), consider the previous coder
was using too many bits on LF content (far more than required by
psy), and thus those signals will now be more distorted, not less.
The extra distortion isn't audible though, I carried extensive
ABX testing to make sure.
A very similar patch was also extensively tested by Kamendo2 in
the context of #2686.
2015-10-11 22:29:50 +02:00
|
|
|
s->lambda_sum += s->lambda;
|
|
|
|
s->lambda_count++;
|
2009-07-08 23:01:31 +03:00
|
|
|
|
2012-01-28 20:28:01 +03:00
|
|
|
ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
|
|
|
|
&avpkt->duration);
|
|
|
|
|
|
|
|
*got_packet_ptr = 1;
|
|
|
|
return 0;
|
2009-07-08 23:01:31 +03:00
|
|
|
}
|
|
|
|
|
2008-08-14 08:52:29 +03:00
|
|
|
static av_cold int aac_encode_end(AVCodecContext *avctx)
|
|
|
|
{
|
|
|
|
AACEncContext *s = avctx->priv_data;
|
|
|
|
|
2021-05-29 17:49:22 +02:00
|
|
|
av_log(avctx, AV_LOG_INFO, "Qavg: %.3f\n", s->lambda_count ? s->lambda_sum / s->lambda_count : NAN);
|
AAC encoder: Extensive improvements
This finalizes merging of the work in the patches in ticket #2686.
Improvements to twoloop and RC logic are extensive.
The non-exhaustive list of twoloop improvments includes:
- Tweaks to distortion limits on the RD optimization phase of twoloop
- Deeper search in twoloop
- PNS information marking to let twoloop decide when to use it
(turned out having the decision made separately wasn't working)
- Tonal band detection and priorization
- Better band energy conservation rules
- Strict hole avoidance
For rate control:
- Use psymodel's bit allocation to allow proper use of the bit
reservoir. Don't work against the bit reservoir by moving lambda
in the opposite direction when psymodel decides to allocate more/less
bits to a frame.
- Retry the encode if the effective rate lies outside a reasonable
margin of psymodel's allocation or the selected ABR.
- Log average lambda at the end. Useful info for everyone, but especially
for tuning of the various encoder constants that relate to lambda
feedback.
Psy:
- Do not apply lowpass with a FIR filter, instead just let the coder
zero bands above the cutoff. The FIR filter induces group delay,
and while zeroing bands causes ripple, it's lost in the quantization
noise.
- Experimental VBR bit allocation code
- Tweak automatic lowpass filter threshold to maximize audio bandwidth
at all bitrates while still providing acceptable, stable quality.
I/S:
- Phase decision fixes. Unrelated to #2686, but the bugs only surfaced
when the merge was finalized. Measure I/S band energy accounting for
phase, and prevent I/S and M/S from being applied both.
PNS:
- Avoid marking short bands with PNS when they're part of a window
group in which there's a large variation of energy from one window
to the next. PNS can't preserve those and the effect is extremely
noticeable.
M/S:
- Implement BMLD protection similar to the specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Since M/S decision
doesn't conform to section 6.1, a different method had to be
implemented, but should provide equivalent protection.
- Move the decision logic closer to the method specified in
ISO-IEC/13818:7-2003, Appendix C Section 6.1. Specifically,
make sure M/S needs less bits than dual stereo.
- Don't apply M/S in bands that are using I/S
Now, this of course needed adjustments in the compare targets and
fuzz factors of the AAC encoder's fate tests, but if wondering why
the targets go up (more distortion), consider the previous coder
was using too many bits on LF content (far more than required by
psy), and thus those signals will now be more distorted, not less.
The extra distortion isn't audible though, I carried extensive
ABX testing to make sure.
A very similar patch was also extensively tested by Kamendo2 in
the context of #2686.
2015-10-11 22:29:50 +02:00
|
|
|
|
2008-08-14 08:52:29 +03:00
|
|
|
ff_mdct_end(&s->mdct1024);
|
|
|
|
ff_mdct_end(&s->mdct128);
|
2009-07-08 23:01:31 +03:00
|
|
|
ff_psy_end(&s->psy);
|
2015-08-21 19:43:09 +02:00
|
|
|
ff_lpc_end(&s->lpc);
|
2011-12-15 05:50:23 +03:00
|
|
|
if (s->psypp)
|
|
|
|
ff_psy_preprocess_end(s->psypp);
|
2011-12-15 05:43:56 +03:00
|
|
|
av_freep(&s->buffer.samples);
|
2008-08-14 08:52:29 +03:00
|
|
|
av_freep(&s->cpe);
|
2014-11-29 19:58:13 +02:00
|
|
|
av_freep(&s->fdsp);
|
2012-01-28 20:28:01 +03:00
|
|
|
ff_af_queue_close(&s->afq);
|
2008-08-14 08:52:29 +03:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-12-15 05:50:23 +03:00
|
|
|
static av_cold int dsp_init(AVCodecContext *avctx, AACEncContext *s)
|
|
|
|
{
|
|
|
|
int ret = 0;
|
|
|
|
|
2015-07-27 21:14:31 +02:00
|
|
|
s->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
|
2014-11-29 19:58:13 +02:00
|
|
|
if (!s->fdsp)
|
|
|
|
return AVERROR(ENOMEM);
|
2011-12-15 05:50:23 +03:00
|
|
|
|
|
|
|
// window init
|
2020-11-23 00:33:03 +02:00
|
|
|
ff_aac_float_common_init();
|
2011-12-15 05:50:23 +03:00
|
|
|
|
2015-05-16 19:07:31 +02:00
|
|
|
if ((ret = ff_mdct_init(&s->mdct1024, 11, 0, 32768.0)) < 0)
|
2011-12-15 05:50:23 +03:00
|
|
|
return ret;
|
2015-05-16 19:07:31 +02:00
|
|
|
if ((ret = ff_mdct_init(&s->mdct128, 8, 0, 32768.0)) < 0)
|
2011-12-15 05:50:23 +03:00
|
|
|
return ret;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static av_cold int alloc_buffers(AVCodecContext *avctx, AACEncContext *s)
|
|
|
|
{
|
2012-01-29 23:55:10 +03:00
|
|
|
int ch;
|
2020-06-01 16:48:28 +02:00
|
|
|
if (!FF_ALLOCZ_TYPED_ARRAY(s->buffer.samples, s->channels * 3 * 1024) ||
|
|
|
|
!FF_ALLOCZ_TYPED_ARRAY(s->cpe, s->chan_map[0]))
|
|
|
|
return AVERROR(ENOMEM);
|
2011-12-15 05:50:23 +03:00
|
|
|
|
2012-01-29 23:55:10 +03:00
|
|
|
for(ch = 0; ch < s->channels; ch++)
|
2011-12-25 01:24:16 +03:00
|
|
|
s->planar_samples[ch] = s->buffer.samples + 3 * 1024 * ch;
|
2011-12-15 05:43:56 +03:00
|
|
|
|
2011-12-15 05:50:23 +03:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static av_cold int aac_encode_init(AVCodecContext *avctx)
|
|
|
|
{
|
|
|
|
AACEncContext *s = avctx->priv_data;
|
|
|
|
int i, ret = 0;
|
|
|
|
const uint8_t *sizes[2];
|
|
|
|
uint8_t grouping[AAC_MAX_CHANNELS];
|
|
|
|
int lengths[2];
|
|
|
|
|
2016-02-12 20:34:18 +02:00
|
|
|
/* Constants */
|
2015-12-18 16:27:13 +02:00
|
|
|
s->last_frame_pb_count = 0;
|
2011-12-15 05:50:23 +03:00
|
|
|
avctx->frame_size = 1024;
|
2015-10-12 17:50:10 +02:00
|
|
|
avctx->initial_padding = 1024;
|
2016-02-12 20:34:18 +02:00
|
|
|
s->lambda = avctx->global_quality > 0 ? avctx->global_quality : 120;
|
|
|
|
|
|
|
|
/* Channel map and unspecified bitrate guessing */
|
2013-05-07 08:20:32 +03:00
|
|
|
s->channels = avctx->ch_layout.nb_channels;
|
2016-10-03 20:53:11 +02:00
|
|
|
|
|
|
|
s->needs_pce = 1;
|
|
|
|
for (i = 0; i < FF_ARRAY_ELEMS(aac_normal_chan_layouts); i++) {
|
2013-05-07 08:20:32 +03:00
|
|
|
if (!av_channel_layout_compare(&avctx->ch_layout, &aac_normal_chan_layouts[i])) {
|
2016-10-03 20:53:11 +02:00
|
|
|
s->needs_pce = s->options.pce;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (s->needs_pce) {
|
2018-07-06 23:49:50 +02:00
|
|
|
char buf[64];
|
2016-10-03 20:53:11 +02:00
|
|
|
for (i = 0; i < FF_ARRAY_ELEMS(aac_pce_configs); i++)
|
2013-05-07 08:20:32 +03:00
|
|
|
if (!av_channel_layout_compare(&avctx->ch_layout, &aac_pce_configs[i].layout))
|
2016-10-03 20:53:11 +02:00
|
|
|
break;
|
2013-05-07 08:20:32 +03:00
|
|
|
av_channel_layout_describe(&avctx->ch_layout, buf, sizeof(buf));
|
|
|
|
if (i == FF_ARRAY_ELEMS(aac_pce_configs)) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Unsupported channel layout \"%s\"\n", buf);
|
|
|
|
return AVERROR(EINVAL);
|
|
|
|
}
|
2018-07-06 23:49:50 +02:00
|
|
|
av_log(avctx, AV_LOG_INFO, "Using a PCE to encode channel layout \"%s\"\n", buf);
|
2016-10-03 20:53:11 +02:00
|
|
|
s->pce = aac_pce_configs[i];
|
|
|
|
s->reorder_map = s->pce.reorder_map;
|
|
|
|
s->chan_map = s->pce.config_map;
|
|
|
|
} else {
|
|
|
|
s->reorder_map = aac_chan_maps[s->channels - 1];
|
|
|
|
s->chan_map = aac_chan_configs[s->channels - 1];
|
|
|
|
}
|
|
|
|
|
2016-02-12 20:34:18 +02:00
|
|
|
if (!avctx->bit_rate) {
|
|
|
|
for (i = 1; i <= s->chan_map[0]; i++) {
|
|
|
|
avctx->bit_rate += s->chan_map[i] == TYPE_CPE ? 128000 : /* Pair */
|
|
|
|
s->chan_map[i] == TYPE_LFE ? 16000 : /* LFE */
|
|
|
|
69000 ; /* SCE */
|
|
|
|
}
|
|
|
|
}
|
2011-12-15 05:50:23 +03:00
|
|
|
|
2016-02-12 20:34:18 +02:00
|
|
|
/* Samplerate */
|
2011-12-15 05:50:23 +03:00
|
|
|
for (i = 0; i < 16; i++)
|
2021-02-10 20:37:37 +02:00
|
|
|
if (avctx->sample_rate == ff_mpeg4audio_sample_rates[i])
|
2011-12-15 05:50:23 +03:00
|
|
|
break;
|
2015-10-12 17:50:10 +02:00
|
|
|
s->samplerate_index = i;
|
|
|
|
ERROR_IF(s->samplerate_index == 16 ||
|
|
|
|
s->samplerate_index >= ff_aac_swb_size_1024_len ||
|
|
|
|
s->samplerate_index >= ff_aac_swb_size_128_len,
|
2011-12-15 05:50:23 +03:00
|
|
|
"Unsupported sample rate %d\n", avctx->sample_rate);
|
2016-02-12 20:34:18 +02:00
|
|
|
|
|
|
|
/* Bitrate limiting */
|
2015-03-06 09:05:32 +02:00
|
|
|
WARN_IF(1024.0 * avctx->bit_rate / avctx->sample_rate > 6144 * s->channels,
|
2015-12-08 10:59:45 +02:00
|
|
|
"Too many bits %f > %d per frame requested, clamping to max\n",
|
2015-11-28 13:28:21 +02:00
|
|
|
1024.0 * avctx->bit_rate / avctx->sample_rate,
|
|
|
|
6144 * s->channels);
|
2016-02-12 20:34:18 +02:00
|
|
|
avctx->bit_rate = (int64_t)FFMIN(6144 * s->channels / 1024.0 * avctx->sample_rate,
|
|
|
|
avctx->bit_rate);
|
2015-10-12 17:50:10 +02:00
|
|
|
|
2016-02-12 20:34:18 +02:00
|
|
|
/* Profile and option setting */
|
|
|
|
avctx->profile = avctx->profile == FF_PROFILE_UNKNOWN ? FF_PROFILE_AAC_LOW :
|
|
|
|
avctx->profile;
|
2015-10-17 04:15:44 +02:00
|
|
|
for (i = 0; i < FF_ARRAY_ELEMS(aacenc_profiles); i++)
|
|
|
|
if (avctx->profile == aacenc_profiles[i])
|
2015-10-12 17:50:10 +02:00
|
|
|
break;
|
2015-10-17 04:15:44 +02:00
|
|
|
if (avctx->profile == FF_PROFILE_MPEG2_AAC_LOW) {
|
|
|
|
avctx->profile = FF_PROFILE_AAC_LOW;
|
|
|
|
ERROR_IF(s->options.pred,
|
|
|
|
"Main prediction unavailable in the \"mpeg2_aac_low\" profile\n");
|
|
|
|
ERROR_IF(s->options.ltp,
|
|
|
|
"LTP prediction unavailable in the \"mpeg2_aac_low\" profile\n");
|
|
|
|
WARN_IF(s->options.pns,
|
|
|
|
"PNS unavailable in the \"mpeg2_aac_low\" profile, turning off\n");
|
|
|
|
s->options.pns = 0;
|
|
|
|
} else if (avctx->profile == FF_PROFILE_AAC_LTP) {
|
|
|
|
s->options.ltp = 1;
|
|
|
|
ERROR_IF(s->options.pred,
|
|
|
|
"Main prediction unavailable in the \"aac_ltp\" profile\n");
|
|
|
|
} else if (avctx->profile == FF_PROFILE_AAC_MAIN) {
|
|
|
|
s->options.pred = 1;
|
|
|
|
ERROR_IF(s->options.ltp,
|
|
|
|
"LTP prediction unavailable in the \"aac_main\" profile\n");
|
|
|
|
} else if (s->options.ltp) {
|
|
|
|
avctx->profile = FF_PROFILE_AAC_LTP;
|
|
|
|
WARN_IF(1,
|
|
|
|
"Chainging profile to \"aac_ltp\"\n");
|
|
|
|
ERROR_IF(s->options.pred,
|
|
|
|
"Main prediction unavailable in the \"aac_ltp\" profile\n");
|
|
|
|
} else if (s->options.pred) {
|
|
|
|
avctx->profile = FF_PROFILE_AAC_MAIN;
|
|
|
|
WARN_IF(1,
|
|
|
|
"Chainging profile to \"aac_main\"\n");
|
2015-12-05 20:43:17 +02:00
|
|
|
ERROR_IF(s->options.ltp,
|
2015-10-17 04:15:44 +02:00
|
|
|
"LTP prediction unavailable in the \"aac_main\" profile\n");
|
2015-08-21 20:20:22 +02:00
|
|
|
}
|
2015-10-17 04:15:44 +02:00
|
|
|
s->profile = avctx->profile;
|
2015-03-06 09:05:32 +02:00
|
|
|
|
2016-02-12 20:34:18 +02:00
|
|
|
/* Coder limitations */
|
|
|
|
s->coder = &ff_aac_coders[s->options.coder];
|
2016-08-07 01:49:34 +02:00
|
|
|
if (s->options.coder == AAC_CODER_ANMR) {
|
2015-12-05 16:41:41 +02:00
|
|
|
ERROR_IF(avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL,
|
2016-08-13 18:34:58 +02:00
|
|
|
"The ANMR coder is considered experimental, add -strict -2 to enable!\n");
|
2015-09-01 13:07:00 +02:00
|
|
|
s->options.intensity_stereo = 0;
|
|
|
|
s->options.pns = 0;
|
|
|
|
}
|
2016-01-20 18:49:55 +02:00
|
|
|
ERROR_IF(s->options.ltp && avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL,
|
|
|
|
"The LPT profile requires experimental compliance, add -strict -2 to enable!\n");
|
|
|
|
|
2016-02-13 14:23:22 +02:00
|
|
|
/* M/S introduces horrible artifacts with multichannel files, this is temporary */
|
|
|
|
if (s->channels > 3)
|
|
|
|
s->options.mid_side = 0;
|
|
|
|
|
2014-12-17 15:53:43 +02:00
|
|
|
if ((ret = dsp_init(avctx, s)) < 0)
|
2020-06-01 16:48:28 +02:00
|
|
|
return ret;
|
2011-12-15 05:50:23 +03:00
|
|
|
|
2014-12-17 15:53:43 +02:00
|
|
|
if ((ret = alloc_buffers(avctx, s)) < 0)
|
2020-06-01 16:48:28 +02:00
|
|
|
return ret;
|
2011-12-15 05:50:23 +03:00
|
|
|
|
2017-11-09 06:30:07 +02:00
|
|
|
if ((ret = put_audio_specific_config(avctx)))
|
2020-06-01 16:48:28 +02:00
|
|
|
return ret;
|
2011-12-15 05:50:23 +03:00
|
|
|
|
2015-10-12 17:50:10 +02:00
|
|
|
sizes[0] = ff_aac_swb_size_1024[s->samplerate_index];
|
|
|
|
sizes[1] = ff_aac_swb_size_128[s->samplerate_index];
|
|
|
|
lengths[0] = ff_aac_num_swb_1024[s->samplerate_index];
|
|
|
|
lengths[1] = ff_aac_num_swb_128[s->samplerate_index];
|
2011-12-15 05:50:23 +03:00
|
|
|
for (i = 0; i < s->chan_map[0]; i++)
|
|
|
|
grouping[i] = s->chan_map[i + 1] == TYPE_CPE;
|
2014-12-17 15:53:43 +02:00
|
|
|
if ((ret = ff_psy_init(&s->psy, avctx, 2, sizes, lengths,
|
|
|
|
s->chan_map[0], grouping)) < 0)
|
2020-06-01 16:48:28 +02:00
|
|
|
return ret;
|
2011-12-15 05:50:23 +03:00
|
|
|
s->psypp = ff_psy_preprocess_init(avctx);
|
2015-09-01 07:40:12 +02:00
|
|
|
ff_lpc_init(&s->lpc, 2*avctx->frame_size, TNS_MAX_ORDER, FF_LPC_TYPE_LEVINSON);
|
2016-10-08 02:47:04 +02:00
|
|
|
s->random_state = 0x1f2e3d4c;
|
2011-12-15 05:50:23 +03:00
|
|
|
|
2016-10-08 16:59:14 +02:00
|
|
|
s->abs_pow34 = abs_pow34_v;
|
|
|
|
s->quant_bands = quantize_bands;
|
|
|
|
|
2022-06-12 05:51:12 +02:00
|
|
|
#if ARCH_X86
|
|
|
|
ff_aac_dsp_init_x86(s);
|
|
|
|
#endif
|
2016-10-08 16:59:14 +02:00
|
|
|
|
2022-06-12 05:51:12 +02:00
|
|
|
#if HAVE_MIPSDSP
|
|
|
|
ff_aac_coder_init_mips(s);
|
|
|
|
#endif
|
2013-03-06 16:55:05 +03:00
|
|
|
|
2012-01-28 20:28:01 +03:00
|
|
|
ff_af_queue_init(avctx, &s->afq);
|
2020-11-19 17:54:45 +02:00
|
|
|
ff_aac_tableinit();
|
2012-01-28 20:28:01 +03:00
|
|
|
|
2011-12-15 05:50:23 +03:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-06-01 08:38:09 +03:00
|
|
|
#define AACENC_FLAGS AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM
|
|
|
|
static const AVOption aacenc_options[] = {
|
2021-05-21 17:39:36 +02:00
|
|
|
{"aac_coder", "Coding algorithm", offsetof(AACEncContext, options.coder), AV_OPT_TYPE_INT, {.i64 = AAC_CODER_TWOLOOP}, 0, AAC_CODER_NB-1, AACENC_FLAGS, "coder"},
|
2015-10-12 17:50:10 +02:00
|
|
|
{"anmr", "ANMR method", 0, AV_OPT_TYPE_CONST, {.i64 = AAC_CODER_ANMR}, INT_MIN, INT_MAX, AACENC_FLAGS, "coder"},
|
|
|
|
{"twoloop", "Two loop searching method", 0, AV_OPT_TYPE_CONST, {.i64 = AAC_CODER_TWOLOOP}, INT_MIN, INT_MAX, AACENC_FLAGS, "coder"},
|
2018-01-13 13:46:29 +02:00
|
|
|
{"fast", "Default fast search", 0, AV_OPT_TYPE_CONST, {.i64 = AAC_CODER_FAST}, INT_MIN, INT_MAX, AACENC_FLAGS, "coder"},
|
2015-10-17 03:20:13 +02:00
|
|
|
{"aac_ms", "Force M/S stereo coding", offsetof(AACEncContext, options.mid_side), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, AACENC_FLAGS},
|
2015-10-17 04:15:44 +02:00
|
|
|
{"aac_is", "Intensity stereo coding", offsetof(AACEncContext, options.intensity_stereo), AV_OPT_TYPE_BOOL, {.i64 = 1}, -1, 1, AACENC_FLAGS},
|
|
|
|
{"aac_pns", "Perceptual noise substitution", offsetof(AACEncContext, options.pns), AV_OPT_TYPE_BOOL, {.i64 = 1}, -1, 1, AACENC_FLAGS},
|
2015-10-17 12:06:05 +02:00
|
|
|
{"aac_tns", "Temporal noise shaping", offsetof(AACEncContext, options.tns), AV_OPT_TYPE_BOOL, {.i64 = 1}, -1, 1, AACENC_FLAGS},
|
2015-10-17 04:15:44 +02:00
|
|
|
{"aac_ltp", "Long term prediction", offsetof(AACEncContext, options.ltp), AV_OPT_TYPE_BOOL, {.i64 = 0}, -1, 1, AACENC_FLAGS},
|
|
|
|
{"aac_pred", "AAC-Main prediction", offsetof(AACEncContext, options.pred), AV_OPT_TYPE_BOOL, {.i64 = 0}, -1, 1, AACENC_FLAGS},
|
2016-10-03 20:53:11 +02:00
|
|
|
{"aac_pce", "Forces the use of PCEs", offsetof(AACEncContext, options.pce), AV_OPT_TYPE_BOOL, {.i64 = 0}, -1, 1, AACENC_FLAGS},
|
2020-05-10 20:38:11 +02:00
|
|
|
FF_AAC_PROFILE_OPTS
|
2011-06-01 08:38:09 +03:00
|
|
|
{NULL}
|
|
|
|
};
|
|
|
|
|
|
|
|
static const AVClass aacenc_class = {
|
2017-06-10 16:45:06 +02:00
|
|
|
.class_name = "AAC encoder",
|
|
|
|
.item_name = av_default_item_name,
|
|
|
|
.option = aacenc_options,
|
|
|
|
.version = LIBAVUTIL_VERSION_INT,
|
2011-06-01 08:38:09 +03:00
|
|
|
};
|
|
|
|
|
2022-03-16 22:26:11 +02:00
|
|
|
static const FFCodecDefault aac_encode_defaults[] = {
|
2016-02-12 20:34:18 +02:00
|
|
|
{ "b", "0" },
|
|
|
|
{ NULL }
|
|
|
|
};
|
|
|
|
|
2022-03-16 22:09:54 +02:00
|
|
|
const FFCodec ff_aac_encoder = {
|
|
|
|
.p.name = "aac",
|
|
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("AAC (Advanced Audio Coding)"),
|
|
|
|
.p.type = AVMEDIA_TYPE_AUDIO,
|
|
|
|
.p.id = AV_CODEC_ID_AAC,
|
2021-05-11 20:52:13 +02:00
|
|
|
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
|
|
|
|
AV_CODEC_CAP_SMALL_LAST_FRAME,
|
2011-07-17 13:54:31 +03:00
|
|
|
.priv_data_size = sizeof(AACEncContext),
|
|
|
|
.init = aac_encode_init,
|
2022-03-30 23:28:24 +02:00
|
|
|
FF_CODEC_ENCODE_CB(aac_encode_frame),
|
2011-07-17 13:54:31 +03:00
|
|
|
.close = aac_encode_end,
|
2016-02-12 20:34:18 +02:00
|
|
|
.defaults = aac_encode_defaults,
|
2022-03-16 22:09:54 +02:00
|
|
|
.p.supported_samplerates = ff_mpeg4audio_sample_rates,
|
2022-07-10 00:05:45 +02:00
|
|
|
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
|
2022-03-16 22:09:54 +02:00
|
|
|
.p.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
|
2012-04-06 19:19:39 +03:00
|
|
|
AV_SAMPLE_FMT_NONE },
|
2022-03-16 22:09:54 +02:00
|
|
|
.p.priv_class = &aacenc_class,
|
2008-08-14 08:52:29 +03:00
|
|
|
};
|