LCOV - code coverage report
Current view: top level - libavcodec - dv_tablegen.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 20 21 95.2 %
Date: 2017-12-11 20:48:03 Functions: 1 1 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Header file for hardcoded DV tables
       3             :  *
       4             :  * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
       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             : #ifndef AVCODEC_DV_TABLEGEN_H
      24             : #define AVCODEC_DV_TABLEGEN_H
      25             : 
      26             : #include <stdint.h>
      27             : #include "libavutil/attributes.h"
      28             : 
      29             : #include "dvdata.h"
      30             : 
      31             : #if CONFIG_SMALL
      32             : #define DV_VLC_MAP_RUN_SIZE  15
      33             : #define DV_VLC_MAP_LEV_SIZE  23
      34             : #else
      35             : #define DV_VLC_MAP_RUN_SIZE  64
      36             : #define DV_VLC_MAP_LEV_SIZE 512 // FIXME sign was removed so this should be /2 but needs check
      37             : #endif
      38             : 
      39             : /* VLC encoding lookup table */
      40             : typedef struct dv_vlc_pair {
      41             :     uint32_t vlc;
      42             :     uint32_t size;
      43             : } dv_vlc_pair;
      44             : 
      45             : #if CONFIG_HARDCODED_TABLES
      46             : #define dv_vlc_map_tableinit()
      47             : #include "libavcodec/dv_tables.h"
      48             : #else
      49             : static struct dv_vlc_pair dv_vlc_map[DV_VLC_MAP_RUN_SIZE][DV_VLC_MAP_LEV_SIZE];
      50             : 
      51          14 : static av_cold void dv_vlc_map_tableinit(void)
      52             : {
      53             :     int i, j;
      54        5726 :     for (i = 0; i < NB_DV_VLC - 1; i++) {
      55        5712 :         if (ff_dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE)
      56           0 :             continue;
      57             : #if CONFIG_SMALL
      58             :         if (ff_dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE)
      59             :             continue;
      60             : #endif
      61             : 
      62        5712 :         if (dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size != 0)
      63         406 :             continue;
      64             : 
      65       10612 :         dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].vlc  =
      66       10612 :             ff_dv_vlc_bits[i] << (!!ff_dv_vlc_level[i]);
      67       10612 :         dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size =
      68       10612 :             ff_dv_vlc_len[i]   + (!!ff_dv_vlc_level[i]);
      69             :     }
      70         910 :     for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) {
      71             : #if CONFIG_SMALL
      72             :         for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) {
      73             :             if (dv_vlc_map[i][j].size == 0) {
      74             :                 dv_vlc_map[i][j].vlc  = dv_vlc_map[0][j].vlc |
      75             :                                         (dv_vlc_map[i - 1][0].vlc <<
      76             :                                          dv_vlc_map[0][j].size);
      77             :                 dv_vlc_map[i][j].size = dv_vlc_map[i - 1][0].size +
      78             :                                         dv_vlc_map[0][j].size;
      79             :             }
      80             :         }
      81             : #else
      82      229376 :         for (j = 1; j < DV_VLC_MAP_LEV_SIZE / 2; j++) {
      83      228480 :             if (dv_vlc_map[i][j].size == 0) {
      84      448140 :                 dv_vlc_map[i][j].vlc  = dv_vlc_map[0][j].vlc |
      85      448140 :                                         (dv_vlc_map[i - 1][0].vlc <<
      86      224070 :                                          dv_vlc_map[0][j].size);
      87      448140 :                 dv_vlc_map[i][j].size = dv_vlc_map[i - 1][0].size +
      88      224070 :                                         dv_vlc_map[0][j].size;
      89             :             }
      90      228480 :             dv_vlc_map[i][((uint16_t) (-j)) & 0x1ff].vlc  = dv_vlc_map[i][j].vlc | 1;
      91      228480 :             dv_vlc_map[i][((uint16_t) (-j)) & 0x1ff].size = dv_vlc_map[i][j].size;
      92             :         }
      93             : #endif
      94             :     }
      95          14 : }
      96             : #endif /* CONFIG_HARDCODED_TABLES */
      97             : 
      98             : #endif /* AVCODEC_DV_TABLEGEN_H */

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