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libavcodec
aacenc.h
Go to the documentation of this file.
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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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#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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typedef
enum
AACCoder
{
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AAC_CODER_FAAC
= 0,
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AAC_CODER_ANMR
,
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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
stereo_mode
;
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int
aac_coder
;
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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
,
int
size
,
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int
scale_idx,
int
cb
,
const
float
lambda
);
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void
(*
search_for_ms
)(
struct
AACEncContext
*
s
,
ChannelElement
*
cpe
,
const
float
lambda
);
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}
AACCoefficientsEncoder
;
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extern
AACCoefficientsEncoder
ff_aac_coders
[];
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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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float
*
planar_samples
[6];
///< saved preprocessed input
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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
*
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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AACCoefficientsEncoder
*
coder
;
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int
cur_channel
;
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int
last_frame
;
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float
lambda
;
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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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struct
{
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float
*
samples
;
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}
buffer
;
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}
AACEncContext
;
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extern
float
ff_aac_pow34sf_tab
[428];
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void
ff_aac_coder_init_mips
(
AACEncContext
*
c
);
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#endif
/* AVCODEC_AACENC_H */
Generated on Sun Mar 8 2015 02:34:46 for FFmpeg by
1.8.2