modules/demux/vobsub.h

   1 /*****************************************************************************
   2  * vobsub.h: Vobsub support
   3  *****************************************************************************
   4  * Copyright (C) 2009 VLC authors and VideoLAN
   5  *
   6  * Authors: John Stebbins
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU Lesser General Public License as published by
  10  * the Free Software Foundation; either version 2.1 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program 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
  16  * GNU Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 static inline void vobsub_palette_argb2ayvu( const uint32_t *src, uint32_t *dst )
  24 {
  25     int i;
  26     for( i = 0; i < 16; i++ )
  27     {
  28         uint8_t r, g, b, y, u, v;
  29         r = (src[i] >> 16) & 0xff;
  30         g = (src[i] >> 8) & 0xff;
  31         b = (src[i] >> 0) & 0xff;
  32         y = (uint8_t) __MIN(abs(r * 2104 + g * 4130 + b * 802 + 4096 + 131072) >> 13, 235);
  33         u = (uint8_t) __MIN(abs(r * -1214 + g * -2384 + b * 3598 + 4096 + 1048576) >> 13, 240);
  34         v = (uint8_t) __MIN(abs(r * 3598 + g * -3013 + b * -585 + 4096 + 1048576) >> 13, 240);
  35         dst[i] = (y&0xff)<<16 | (v&0xff)<<8 | (u&0xff);
  36     }
  37 }
  38
  39 static inline int vobsub_palette_parse( const char *psz_buf, uint32_t *pu_palette )
  40 {
  41     uint32_t palette[16];
  42     if( sscanf( psz_buf, "palette: "
  43                 "%" SCNx32", %" SCNx32 ", %" SCNx32 ", %" SCNx32 ", "
  44                 "%" SCNx32", %" SCNx32 ", %" SCNx32 ", %" SCNx32 ", "
  45                 "%" SCNx32", %" SCNx32 ", %" SCNx32 ", %" SCNx32 ", "
  46                 "%" SCNx32", %" SCNx32 ", %" SCNx32 ", %" SCNx32 "",
  47                 &palette[0], &palette[1], &palette[2], &palette[3],
  48                 &palette[4], &palette[5], &palette[6], &palette[7],
  49                 &palette[8], &palette[9], &palette[10], &palette[11],
  50                 &palette[12], &palette[13], &palette[14], &palette[15] ) == 16 )
  51     {
  52         vobsub_palette_argb2ayvu( palette, pu_palette );
  53         return VLC_SUCCESS;
  54     }
  55     else
  56     {
  57         return VLC_EGENERIC;
  58     }
  59 }
  60
  61 static inline int vobsub_size_parse( const char *psz_buf,
  62                                      int *pi_original_frame_width,
  63                                      int *pi_original_frame_height )
  64 {
  65     int w, h;
  66     if( sscanf( psz_buf, "size: %dx%d", &w, &h ) == 2 )
  67     {
  68         *pi_original_frame_width = w;
  69         *pi_original_frame_height = h;
  70         return VLC_SUCCESS;
  71     }
  72     else
  73     {
  74         return VLC_EGENERIC;
  75     }
  76 }
  77