libavcodec/intrax8.h

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #ifndef AVCODEC_INTRAX8_H
  20 #define AVCODEC_INTRAX8_H
  21
  22 #include "get_bits.h"
  23 #include "mpegvideo.h"
  24
  25 typedef struct{
  26     VLC * j_ac_vlc[4];//they point to the static j_mb_vlc
  27     VLC * j_orient_vlc;
  28     VLC * j_dc_vlc[3];
  29
  30     int use_quant_matrix;
  31 //set by ff_intrax8_common_init
  32     uint8_t * prediction_table;//2*(mb_w*2)
  33     ScanTable scantable[3];
  34 //set by the caller codec
  35     MpegEncContext * s;
  36     int quant;
  37     int dquant;
  38     int qsum;
  39 //calculated per frame
  40     int quant_dc_chroma;
  41     int divide_quant_dc_luma;
  42     int divide_quant_dc_chroma;
  43 //changed per block
  44     int edges;
  45     int flat_dc;
  46     int predicted_dc;
  47     int raw_orient;
  48     int chroma_orient;
  49     int orient;
  50     int est_run;
  51 } IntraX8Context;
  52
  53 void ff_intrax8_common_init(IntraX8Context * w, MpegEncContext * const s);
  54 void ff_intrax8_common_end(IntraX8Context * w);
  55 int  ff_intrax8_decode_picture(IntraX8Context * w, int quant, int halfpq);
  56
  57 #endif /* AVCODEC_INTRAX8_H */