libavcodec/aacenc_pred.h
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 /*
  * AAC encoder main-type prediction
  * Copyright (C) 2015 Rostislav Pehlivanov
  *
  * 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
  */
 
 /**
  * @file
  * AAC encoder main prediction
  * @author Rostislav Pehlivanov ( atomnuker gmail com )
  */
 
 #ifndef AVCODEC_AACENC_PRED_H
 #define AVCODEC_AACENC_PRED_H
 
 #include "aacenc.h"
 
 /* Every predictor group needs to get reset at least once in this many frames */
 #define PRED_RESET_FRAME_MIN 240
 
 /* Any frame with less than this amount of frames since last reset is ok */
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 #define PRED_RESET_MIN 64
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 /* Raise to filter any low frequency artifacts due to prediction */
 #define PRED_SFB_START 10
 
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 void ff_aac_apply_main_pred(AACEncContext *s, SingleChannelElement *sce);
 void ff_aac_adjust_common_prediction(AACEncContext *s, ChannelElement *cpe);
 void ff_aac_search_for_pred(AACEncContext *s, SingleChannelElement *sce);
 void ff_aac_encode_main_pred(AACEncContext *s, SingleChannelElement *sce);
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 #endif /* AVCODEC_AACENC_PRED_H */