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ffmpeg / libavcodec / aacenc.h @ 84dc2d8a

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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 "avcodec.h"
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#include "put_bits.h"
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#include "dsputil.h"
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#include "aac.h"
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#include "psymodel.h"
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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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    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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    DSPContext  dsp;
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    DECLARE_ALIGNED(16, FFTSample, output)[2048]; ///< temporary buffer for MDCT input coefficients
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    int16_t* samples;                            ///< saved preprocessed input
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    int samplerate_index;                        ///< MPEG-4 samplerate index
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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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    DECLARE_ALIGNED(16, int,   qcoefs)[96][2];   ///< quantized coefficients
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    DECLARE_ALIGNED(16, float, scoefs)[1024];    ///< scaled coefficients
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} AACEncContext;
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#endif /* AVCODEC_AACENC_H */