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428 lines
17 KiB
C
428 lines
17 KiB
C
/*
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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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#ifndef AVCODEC_AACENC_H
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#define AVCODEC_AACENC_H
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#include "libavutil/float_dsp.h"
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#include "avcodec.h"
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#include "put_bits.h"
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#include "aac.h"
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#include "audio_frame_queue.h"
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#include "psymodel.h"
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#include "lpc.h"
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typedef enum AACCoder {
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AAC_CODER_ANMR = 0,
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AAC_CODER_TWOLOOP,
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AAC_CODER_FAST,
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AAC_CODER_NB,
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}AACCoder;
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typedef struct AACEncOptions {
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int coder;
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int pns;
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int tns;
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int ltp;
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int pce;
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int pred;
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int mid_side;
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int intensity_stereo;
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} AACEncOptions;
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struct AACEncContext;
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typedef struct AACCoefficientsEncoder {
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void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s,
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SingleChannelElement *sce, const float lambda);
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void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce,
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int win, int group_len, const float lambda);
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void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, float *out, int size,
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int scale_idx, int cb, const float lambda, int rtz);
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void (*encode_tns_info)(struct AACEncContext *s, SingleChannelElement *sce);
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void (*encode_ltp_info)(struct AACEncContext *s, SingleChannelElement *sce, int common_window);
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void (*encode_main_pred)(struct AACEncContext *s, SingleChannelElement *sce);
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void (*adjust_common_pred)(struct AACEncContext *s, ChannelElement *cpe);
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void (*adjust_common_ltp)(struct AACEncContext *s, ChannelElement *cpe);
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void (*apply_main_pred)(struct AACEncContext *s, SingleChannelElement *sce);
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void (*apply_tns_filt)(struct AACEncContext *s, SingleChannelElement *sce);
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void (*update_ltp)(struct AACEncContext *s, SingleChannelElement *sce);
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void (*ltp_insert_new_frame)(struct AACEncContext *s);
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void (*set_special_band_scalefactors)(struct AACEncContext *s, SingleChannelElement *sce);
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void (*search_for_pns)(struct AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce);
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void (*mark_pns)(struct AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce);
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void (*search_for_tns)(struct AACEncContext *s, SingleChannelElement *sce);
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void (*search_for_ltp)(struct AACEncContext *s, SingleChannelElement *sce, int common_window);
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void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe);
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void (*search_for_is)(struct AACEncContext *s, AVCodecContext *avctx, ChannelElement *cpe);
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void (*search_for_pred)(struct AACEncContext *s, SingleChannelElement *sce);
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} AACCoefficientsEncoder;
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extern const AACCoefficientsEncoder ff_aac_coders[];
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typedef struct AACQuantizeBandCostCacheEntry {
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float rd;
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float energy;
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int bits;
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char cb;
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char rtz;
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uint16_t generation;
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} AACQuantizeBandCostCacheEntry;
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typedef struct AACPCEInfo {
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int64_t layout;
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int num_ele[4]; ///< front, side, back, lfe
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int pairing[3][8]; ///< front, side, back
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int index[4][8]; ///< front, side, back, lfe
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uint8_t config_map[16]; ///< configs the encoder's channel specific settings
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uint8_t reorder_map[16]; ///< maps channels from lavc to aac order
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} AACPCEInfo;
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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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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_CH_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 = AV_CH_LAYOUT_OCTAGONAL | AV_CH_TOP_CENTER,
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.num_ele = { 2, 2, 2, 0 },
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.pairing = { { 1, 0 }, { 1, 0 }, { 1, 0 }, },
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.index = { { 0, 0 }, { 1, 1 }, { 2, 2 } },
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.config_map = { 6, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
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.reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8 },
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},
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{ /* Meant for order 2/mixed ambisonics */
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.layout = AV_CH_LAYOUT_6POINT0_FRONT | AV_CH_BACK_CENTER |
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AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | AV_CH_TOP_CENTER,
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.num_ele = { 2, 2, 2, 0 },
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.pairing = { { 1, 1 }, { 1, 0 }, { 1, 0 }, },
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.index = { { 0, 1 }, { 2, 0 }, { 3, 1 } },
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.config_map = { 6, TYPE_CPE, TYPE_CPE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
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.reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
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},
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{
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.layout = AV_CH_LAYOUT_HEXADECAGONAL,
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.num_ele = { 4, 2, 4, 0 },
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.pairing = { { 1, 0, 1, 0 }, { 1, 1 }, { 1, 0, 1, 0 }, },
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.index = { { 0, 0, 1, 1 }, { 2, 3 }, { 4, 2, 5, 3 } },
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.config_map = { 10, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
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.reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
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},
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};
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/**
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* AAC encoder context
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*/
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typedef struct AACEncContext {
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AVClass *av_class;
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AACEncOptions options; ///< encoding options
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PutBitContext pb;
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FFTContext mdct1024; ///< long (1024 samples) frame transform context
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FFTContext mdct128; ///< short (128 samples) frame transform context
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AVFloatDSPContext *fdsp;
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AACPCEInfo pce; ///< PCE data, if needed
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float *planar_samples[16]; ///< saved preprocessed input
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int profile; ///< copied from avctx
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int needs_pce; ///< flag for non-standard layout
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LPCContext lpc; ///< used by TNS
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int samplerate_index; ///< MPEG-4 samplerate index
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int channels; ///< channel count
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const uint8_t *reorder_map; ///< lavc to aac reorder map
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const uint8_t *chan_map; ///< channel configuration map
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ChannelElement *cpe; ///< channel elements
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FFPsyContext psy;
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struct FFPsyPreprocessContext* psypp;
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const AACCoefficientsEncoder *coder;
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int cur_channel; ///< current channel for coder context
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int random_state;
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float lambda;
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int last_frame_pb_count; ///< number of bits for the previous frame
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float lambda_sum; ///< sum(lambda), for Qvg reporting
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int lambda_count; ///< count(lambda), for Qvg reporting
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enum RawDataBlockType cur_type; ///< channel group type cur_channel belongs to
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AudioFrameQueue afq;
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DECLARE_ALIGNED(16, int, qcoefs)[96]; ///< quantized coefficients
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DECLARE_ALIGNED(32, float, scoefs)[1024]; ///< scaled coefficients
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uint16_t quantize_band_cost_cache_generation;
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AACQuantizeBandCostCacheEntry quantize_band_cost_cache[256][128]; ///< memoization area for quantize_band_cost
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void (*abs_pow34)(float *out, const float *in, const int size);
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void (*quant_bands)(int *out, const float *in, const float *scaled,
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int size, int is_signed, int maxval, const float Q34,
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const float rounding);
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struct {
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float *samples;
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} buffer;
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} AACEncContext;
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void ff_aac_dsp_init_x86(AACEncContext *s);
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void ff_aac_coder_init_mips(AACEncContext *c);
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void ff_quantize_band_cost_cache_init(struct AACEncContext *s);
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#endif /* AVCODEC_AACENC_H */
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