libavcodec/mpeg12vlc.h

   1 /*
   2  * MPEG-1/2 VLC
   3  * copyright (c) 2000,2001 Fabrice Bellard
   4  * copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /**
  24  * @file
  25  * MPEG-1/2 VLC.
  26  */
  27
  28 #ifndef AVCODEC_MPEG12VLC_H
  29 #define AVCODEC_MPEG12VLC_H
  30
  31 #include "vlc.h"
  32
  33 #define DC_VLC_BITS 9
  34 #define MV_VLC_BITS 8
  35 #define TEX_VLC_BITS 9
  36
  37 #define MBINCR_VLC_BITS 9
  38 #define MB_PAT_VLC_BITS 9
  39 #define MB_PTYPE_VLC_BITS 6
  40 #define MB_BTYPE_VLC_BITS 6
  41
  42 extern VLCElem ff_dc_lum_vlc[];
  43 extern VLCElem ff_dc_chroma_vlc[];
  44 extern VLCElem ff_mbincr_vlc[];
  45 extern VLCElem ff_mb_ptype_vlc[];
  46 extern VLCElem ff_mb_btype_vlc[];
  47 extern VLCElem ff_mb_pat_vlc[];
  48 extern VLCElem ff_mv_vlc[];
  49
  50 void ff_mpeg12_init_vlcs(void);
  51
  52 #define MPEG12_RL_NB_ELEMS 111
  53
  54 extern const int8_t ff_mpeg12_level[MPEG12_RL_NB_ELEMS];
  55 extern const int8_t ff_mpeg12_run[MPEG12_RL_NB_ELEMS];
  56
  57 extern const uint16_t ff_mpeg1_vlc_table[MPEG12_RL_NB_ELEMS + 2][2];
  58 extern const uint16_t ff_mpeg2_vlc_table[MPEG12_RL_NB_ELEMS + 2][2];
  59
  60 extern RL_VLC_ELEM ff_mpeg1_rl_vlc[];
  61 extern RL_VLC_ELEM ff_mpeg2_rl_vlc[];
  62
  63 void ff_init_2d_vlc_rl(const uint16_t table_vlc[][2], RL_VLC_ELEM rl_vlc[],
  64                        const int8_t table_run[], const uint8_t table_level[],
  65                        int n, unsigned static_size, int flags);
  66
  67 void ff_mpeg1_init_uni_ac_vlc(const int8_t max_level[], const uint8_t index_run[],
  68                               const uint16_t table_vlc[][2], uint8_t uni_ac_vlc_len[]);
  69
  70 #endif /* AVCODEC_MPEG12VLC_H */