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/*
* AAC encoder
* Copyright (C) 2008 Konstantin Shishkov
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_AACENC_H
#define AVCODEC_AACENC_H
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#include "libavutil/float_dsp.h" |
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#include "avcodec.h"
#include "put_bits.h"
#include "dsputil.h"
#include "aac.h" |
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#include "audio_frame_queue.h" |
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#include "psymodel.h"
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#define AAC_CODER_NB 4
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typedef struct AACEncOptions {
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,
SingleChannelElement *sce, const float lambda);
void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce,
int win, int group_len, const float lambda);
void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, int size,
int scale_idx, int cb, const float lambda);
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[];
/**
* AAC encoder context
*/
typedef struct AACEncContext { |
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AVClass *av_class;
AACEncOptions options; ///< encoding options |
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PutBitContext pb; |
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FFTContext mdct1024; ///< long (1024 samples) frame transform context
FFTContext mdct128; ///< short (128 samples) frame transform context |
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DSPContext dsp; |
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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
FFPsyContext psy;
struct FFPsyPreprocessContext* psypp;
AACCoefficientsEncoder *coder;
int cur_channel;
int last_frame;
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 {
float *samples;
} buffer; |
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} AACEncContext;
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extern float ff_aac_pow34sf_tab[428];
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#endif /* AVCODEC_AACENC_H */ |