LCOV - code coverage report
Current view: top level - libavcodec - rl.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 7 7 100.0 %
Date: 2017-12-18 13:19:42 Functions: 1 1 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2000-2002 Fabrice Bellard
       3             :  * Copyright (c) 2002-2004 Michael Niedermayer
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : /**
      23             :  * @file
      24             :  * rl header.
      25             :  */
      26             : 
      27             : #ifndef AVCODEC_RL_H
      28             : #define AVCODEC_RL_H
      29             : 
      30             : #include <stdint.h>
      31             : 
      32             : #include "vlc.h"
      33             : 
      34             : /* run length table */
      35             : #define MAX_RUN    64
      36             : #define MAX_LEVEL  64
      37             : 
      38             : /** RLTable. */
      39             : typedef struct RLTable {
      40             :     int n;                         ///< number of entries of table_vlc minus 1
      41             :     int last;                      ///< number of values for last = 0
      42             :     const uint16_t (*table_vlc)[2];
      43             :     const int8_t *table_run;
      44             :     const int8_t *table_level;
      45             :     uint8_t *index_run[2];         ///< encoding only
      46             :     int8_t *max_level[2];          ///< encoding & decoding
      47             :     int8_t *max_run[2];            ///< encoding & decoding
      48             :     RL_VLC_ELEM *rl_vlc[32];       ///< decoding only
      49             : } RLTable;
      50             : 
      51             : /**
      52             :  * @param static_store static uint8_t array[2][2*MAX_RUN + MAX_LEVEL + 3] which will hold
      53             :  *                     the level and run tables, if this is NULL av_malloc() will be used
      54             :  */
      55             : int ff_rl_init(RLTable *rl, uint8_t static_store[2][2*MAX_RUN + MAX_LEVEL + 3]);
      56             : void ff_rl_init_vlc(RLTable *rl, unsigned static_size);
      57             : 
      58             : /**
      59             :  * Free the contents of a dynamically allocated table.
      60             :  */
      61             : void ff_rl_free(RLTable *rl);
      62             : 
      63             : #define INIT_VLC_RL(rl, static_size)\
      64             : {\
      65             :     int q;\
      66             :     static RL_VLC_ELEM rl_vlc_table[32][static_size];\
      67             : \
      68             :     if(!rl.rl_vlc[0]){\
      69             :         for(q=0; q<32; q++)\
      70             :             rl.rl_vlc[q]= rl_vlc_table[q];\
      71             : \
      72             :         ff_rl_init_vlc(&rl, static_size);\
      73             :     }\
      74             : }
      75             : 
      76    38298498 : static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
      77             : {
      78             :     int index;
      79    38298498 :     index = rl->index_run[last][run];
      80    38298498 :     if (index >= rl->n)
      81     7161303 :         return rl->n;
      82    31137195 :     if (level > rl->max_level[last][run])
      83     5844688 :         return rl->n;
      84    25292507 :     return index + level - 1;
      85             : }
      86             : 
      87             : #endif /* AVCODEC_RL_H */

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