libavcodec/utvideo.h
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 /*
  * Common Ut Video header
  * Copyright (c) 2011 Konstantin Shishkov
  *
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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
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
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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
  * 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
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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
  */
 
 #ifndef AVCODEC_UTVIDEO_H
 #define AVCODEC_UTVIDEO_H
 
 /**
  * @file
  * Common Ut Video header
  */
 
 #include "libavutil/common.h"
 #include "avcodec.h"
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 #include "bswapdsp.h"
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 #include "huffyuvencdsp.h"
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 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'),
 };
 
 /* Mapping of libavcodec prediction modes to Ut Video's */
 extern const int ff_ut_pred_order[5];
 
 /* Order of RGB(A) planes in Ut Video */
 extern const int ff_ut_rgb_order[4];
 
 typedef struct UtvideoContext {
     AVCodecContext *avctx;
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     BswapDSPContext bdsp;
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     HuffYUVEncDSPContext hdsp;
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     uint32_t frame_info_size, flags, frame_info;
     int      planes;
     int      slices;
     int      compression;
     int      interlaced;
     int      frame_pred;
 
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     int      slice_stride;
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     uint8_t *slice_bits, *slice_buffer[4];
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     int      slice_bits_size;
 } UtvideoContext;
 
 typedef struct HuffEntry {
     uint8_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);
 
 #endif /* AVCODEC_UTVIDEO_H */