libavcodec/rl.h

   1 /**
   2  * @file rl.h
   3  * rl header.
   4  */
   5
   6 #ifndef AVCODEC_RL_H
   7 #define AVCODEC_RL_H
   8
   9 /** RLTable. */
  10 typedef struct RLTable {
  11     int n;                         ///< number of entries of table_vlc minus 1
  12     int last;                      ///< number of values for last = 0
  13     const uint16_t (*table_vlc)[2];
  14     const int8_t *table_run;
  15     const int8_t *table_level;
  16     uint8_t *index_run[2];         ///< encoding only
  17     int8_t *max_level[2];          ///< encoding & decoding
  18     int8_t *max_run[2];            ///< encoding & decoding
  19     VLC vlc;                       ///< decoding only deprected FIXME remove
  20     RL_VLC_ELEM *rl_vlc[32];       ///< decoding only
  21 } RLTable;
  22
  23 /**
  24  *
  25  * @param static_store static uint8_t array[2][2*MAX_RUN + MAX_LEVEL + 3] which will hold
  26  *                     the level and run tables, if this is NULL av_malloc() will be used
  27  */
  28 void init_rl(RLTable *rl, uint8_t static_store[2][2*MAX_RUN + MAX_LEVEL + 3]);
  29 void init_vlc_rl(RLTable *rl, int use_static);
  30
  31 static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
  32 {
  33     int index;
  34     index = rl->index_run[last][run];
  35     if (index >= rl->n)
  36         return rl->n;
  37     if (level > rl->max_level[last][run])
  38         return rl->n;
  39     return index + level - 1;
  40 }
  41
  42 #endif