text: /*
   * Common Ut Video header
   * Copyright (c) 2011 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_UTVIDEO_H
  #define AVCODEC_UTVIDEO_H
  
  /**
   * @file
   * Common Ut Video header
   */
  
  #include "libavutil/common.h"
  #include "avcodec.h"
  #include "bswapdsp.h"
  #include "utvideodsp.h"
  #include "lossless_videodsp.h"
  #include "lossless_videoencdsp.h"
  
  enum {
      PRED_NONE = 0,
      PRED_LEFT,
      PRED_GRADIENT,
      PRED_MEDIAN,
  };
  
  enum {
      COMP_NONE = 0,
      COMP_HUFF,
  };
  
  /*
   * "Original format" markers.
   * Based on values gotten from the official VFW encoder.
   * They are not used during decoding, but they do have
   * an informative role on seeing what was input
   * to the encoder.
   */
  enum {
      UTVIDEO_RGB  = MKTAG(0x00, 0x00, 0x01, 0x18),
      UTVIDEO_RGBA = MKTAG(0x00, 0x00, 0x02, 0x18),
      UTVIDEO_420  = MKTAG('Y', 'V', '1', '2'),
      UTVIDEO_422  = MKTAG('Y', 'U', 'Y', '2'),
      UTVIDEO_444  = MKTAG('Y', 'V', '2', '4'),
  };
  
  /* Mapping of libavcodec prediction modes to Ut Video's */
  extern const int ff_ut_pred_order[5];
  
  typedef struct UtvideoContext {
      const AVClass *class;
      AVCodecContext *avctx;
      UTVideoDSPContext utdsp;
      BswapDSPContext bdsp;
      LLVidDSPContext llviddsp;
      LLVidEncDSPContext llvidencdsp;
  
      uint32_t frame_info_size, flags, frame_info;
      int      planes;
      int      slices;
      int      compression;
      int      interlaced;
      int      frame_pred;
      int      pro;
  
      ptrdiff_t slice_stride;
      uint8_t *slice_bits, *slice_buffer[4];
      int      slice_bits_size;
  } UtvideoContext;
  
  typedef struct HuffEntry {
      uint16_t sym;
      uint8_t  len;
      uint32_t code;
  } HuffEntry;
  
  /* Compare huffman tree nodes */
  int ff_ut_huff_cmp_len(const void *a, const void *b);
  int ff_ut10_huff_cmp_len(const void *a, const void *b);
  
  #endif /* AVCODEC_UTVIDEO_H */
  