Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  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.  
  28. #include "dv_vlc_data.h"
  29.  
  30. #if CONFIG_SMALL
  31. #define DV_VLC_MAP_RUN_SIZE 15
  32. #define DV_VLC_MAP_LEV_SIZE 23
  33. #else
  34. #define DV_VLC_MAP_RUN_SIZE  64
  35. #define DV_VLC_MAP_LEV_SIZE 512 //FIXME sign was removed so this should be /2 but needs check
  36. #endif
  37.  
  38. /* VLC encoding lookup table */
  39. typedef struct dv_vlc_pair {
  40.    uint32_t vlc;
  41.    uint32_t size;
  42. } dv_vlc_pair;
  43.  
  44. #if CONFIG_HARDCODED_TABLES
  45. #define dv_vlc_map_tableinit()
  46. #include "libavcodec/dv_tables.h"
  47. #else
  48. static struct dv_vlc_pair dv_vlc_map[DV_VLC_MAP_RUN_SIZE][DV_VLC_MAP_LEV_SIZE];
  49.  
  50. static void dv_vlc_map_tableinit(void)
  51. {
  52.     int i, j;
  53.     for (i = 0; i < NB_DV_VLC - 1; i++) {
  54.        if (dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE)
  55.            continue;
  56. #if CONFIG_SMALL
  57.        if (dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE)
  58.            continue;
  59. #endif
  60.  
  61.        if (dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size != 0)
  62.            continue;
  63.  
  64.        dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].vlc  =
  65.            dv_vlc_bits[i] << (!!dv_vlc_level[i]);
  66.        dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size =
  67.            dv_vlc_len[i] + (!!dv_vlc_level[i]);
  68.     }
  69.     for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) {
  70. #if CONFIG_SMALL
  71.        for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) {
  72.           if (dv_vlc_map[i][j].size == 0) {
  73.               dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
  74.                         (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
  75.               dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
  76.                                       dv_vlc_map[0][j].size;
  77.           }
  78.        }
  79. #else
  80.        for (j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) {
  81.           if (dv_vlc_map[i][j].size == 0) {
  82.               dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
  83.                         (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
  84.               dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
  85.                                       dv_vlc_map[0][j].size;
  86.           }
  87.           dv_vlc_map[i][((uint16_t)(-j))&0x1ff].vlc =
  88.                                         dv_vlc_map[i][j].vlc | 1;
  89.           dv_vlc_map[i][((uint16_t)(-j))&0x1ff].size =
  90.                                         dv_vlc_map[i][j].size;
  91.        }
  92. #endif
  93.     }
  94. }
  95. #endif /* CONFIG_HARDCODED_TABLES */
  96.  
  97. #endif /* AVCODEC_DV_TABLEGEN_H */
  98.