mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-12 19:18:44 +02:00
98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
/*
|
|
* 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
|
|
|
|
#include "libavutil/float_dsp.h"
|
|
#include "avcodec.h"
|
|
#include "put_bits.h"
|
|
|
|
#include "aac.h"
|
|
#include "audio_frame_queue.h"
|
|
#include "psymodel.h"
|
|
|
|
typedef enum AACCoder {
|
|
AAC_CODER_FAAC = 0,
|
|
AAC_CODER_ANMR,
|
|
AAC_CODER_TWOLOOP,
|
|
AAC_CODER_FAST,
|
|
|
|
AAC_CODER_NB,
|
|
}AACCoder;
|
|
|
|
typedef struct AACEncOptions {
|
|
int stereo_mode;
|
|
int aac_coder;
|
|
} AACEncOptions;
|
|
|
|
struct AACEncContext;
|
|
|
|
typedef struct AACCoefficientsEncoder {
|
|
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);
|
|
} AACCoefficientsEncoder;
|
|
|
|
extern AACCoefficientsEncoder ff_aac_coders[];
|
|
|
|
/**
|
|
* AAC encoder context
|
|
*/
|
|
typedef struct AACEncContext {
|
|
AVClass *av_class;
|
|
AACEncOptions options; ///< encoding options
|
|
PutBitContext pb;
|
|
FFTContext mdct1024; ///< long (1024 samples) frame transform context
|
|
FFTContext mdct128; ///< short (128 samples) frame transform context
|
|
AVFloatDSPContext fdsp;
|
|
float *planar_samples[6]; ///< saved preprocessed input
|
|
|
|
int samplerate_index; ///< MPEG-4 samplerate index
|
|
int channels; ///< channel count
|
|
const uint8_t *chan_map; ///< channel configuration map
|
|
|
|
ChannelElement *cpe; ///< channel elements
|
|
FFPsyContext psy;
|
|
struct FFPsyPreprocessContext* psypp;
|
|
AACCoefficientsEncoder *coder;
|
|
int cur_channel;
|
|
int last_frame;
|
|
float lambda;
|
|
AudioFrameQueue afq;
|
|
DECLARE_ALIGNED(16, int, qcoefs)[96]; ///< quantized coefficients
|
|
DECLARE_ALIGNED(32, float, scoefs)[1024]; ///< scaled coefficients
|
|
|
|
struct {
|
|
float *samples;
|
|
} buffer;
|
|
} AACEncContext;
|
|
|
|
extern float ff_aac_pow34sf_tab[428];
|
|
|
|
void ff_aac_coder_init_mips(AACEncContext *c);
|
|
|
|
#endif /* AVCODEC_AACENC_H */
|