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ffmpeg-4.2.2/libavcodec/diractab.h 1.59 KB
aac5773f   hucm   功能基本完成,接口待打磨
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  /*
   * Copyright (C) 2016 Open Broadcast Systems Ltd.
   * Author    (C) 2016 Rostislav Pehlivanov <atomnuker@gmail.com>
   *
   * 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_DIRACTAB_H
  #define AVCODEC_DIRACTAB_H
  
  #include <stdint.h>
  
  /* Tables here are shared between the Dirac/VC-2 decoder and the VC-2 encoder */
  
  /* Default quantization tables for each wavelet transform */
  extern const uint8_t ff_dirac_default_qmat[7][4][4];
  
  /* Scaling factors needed for quantization/dequantization */
  extern const int32_t ff_dirac_qscale_tab[116];
  
  /* Scaling offsets needed for quantization/dequantization, for intra frames */
  extern const int32_t ff_dirac_qoffset_intra_tab[120];
  
  /* Scaling offsets needed for quantization/dequantization, for inter frames */
  extern const int ff_dirac_qoffset_inter_tab[122];
  
  #define DIRAC_MAX_QUANT_INDEX (FF_ARRAY_ELEMS(ff_dirac_qscale_tab))
  
  #endif /* AVCODEC_DIRACTAB_H */