text: /*
   * 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 "avcodec.h"
  #include "put_bits.h"
  #include "dsputil.h"
  
  #include "aac.h"
  #include "audio_frame_queue.h"
  #include "psymodel.h"
  
  #define AAC_CODER_NB 4
  
  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
      DSPContext  dsp;
      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];
  
  #endif /* AVCODEC_AACENC_H */
  