/*
  * MPEG1/2 common code
  * Copyright (c) 2007 Aurelien Jacobs <aurel@gnuage.org>
  *
  * 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_MPEG12_H
 #define AVCODEC_MPEG12_H

 
 #include "mpegvideo.h"
 

 #define DC_VLC_BITS 9

 #define MV_VLC_BITS 9

 #define TEX_VLC_BITS 9
 

 #define MBINCR_VLC_BITS 9
 #define MB_PAT_VLC_BITS 9
 #define MB_PTYPE_VLC_BITS 6
 #define MB_BTYPE_VLC_BITS 6
 

 extern VLC ff_dc_lum_vlc;
 extern VLC ff_dc_chroma_vlc;

 extern VLC ff_mbincr_vlc;
 extern VLC ff_mb_ptype_vlc;
 extern VLC ff_mb_btype_vlc;
 extern VLC ff_mb_pat_vlc;
 extern VLC ff_mv_vlc;

 extern uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
 
 void ff_mpeg12_common_init(MpegEncContext *s);

 void ff_mpeg12_init_vlcs(void);

 
 static inline int decode_dc(GetBitContext *gb, int component)
 {
     int code, diff;
 
     if (component == 0) {

         code = get_vlc2(gb, ff_dc_lum_vlc.table, DC_VLC_BITS, 2);

     } else {

         code = get_vlc2(gb, ff_dc_chroma_vlc.table, DC_VLC_BITS, 2);

     }
     if (code < 0){
         av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
         return 0xffff;
     }
     if (code == 0) {
         diff = 0;
     } else {
         diff = get_xbits(gb, code);
     }
     return diff;
 }

 int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n);

 void ff_mpeg1_clean_buffers(MpegEncContext *s);
 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);

 #endif /* AVCODEC_MPEG12_H */