modules/demux/vobsub.h

   1 /*****************************************************************************
   2  * vobsub.h: Vobsub support
   3  *****************************************************************************
   4  * Copyright (C) 2009 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: John Stebbins
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 static inline void vobsub_palette_rgb2yuv( uint32_t *pu_palette )
  25 {
  26     int i;
  27     for( i = 0; i < 16; i++ )
  28     {
  29         uint8_t r, g, b, y, u, v;
  30         r = (pu_palette[i] >> 16) & 0xff;
  31         g = (pu_palette[i] >> 8) & 0xff;
  32         b = (pu_palette[i] >> 0) & 0xff;
  33         y = (uint8_t) __MIN(abs(r * 2104 + g * 4130 + b * 802 + 4096 + 131072) >> 13, 235);
  34         u = (uint8_t) __MIN(abs(r * -1214 + g * -2384 + b * 3598 + 4096 + 1048576) >> 13, 240);
  35         v = (uint8_t) __MIN(abs(r * 3598 + g * -3013 + b * -585 + 4096 + 1048576) >> 13, 240);
  36         pu_palette[i] = (y&0xff)<<16 | (v&0xff)<<8 | (u&0xff);
  37     }
  38 }
  39
  40 static inline int vobsub_palette_parse( const char *psz_buf, uint32_t *pu_palette )
  41 {
  42     if( sscanf( psz_buf, "palette: "
  43                 "%" PRIx32", %" PRIx32 ", %" PRIx32 ", %" PRIx32 ", "
  44                 "%" PRIx32", %" PRIx32 ", %" PRIx32 ", %" PRIx32 ", "
  45                 "%" PRIx32", %" PRIx32 ", %" PRIx32 ", %" PRIx32 ", "
  46                 "%" PRIx32", %" PRIx32 ", %" PRIx32 ", %" PRIx32 "",
  47                 &pu_palette[0], &pu_palette[1], &pu_palette[2], &pu_palette[3],
  48                 &pu_palette[4], &pu_palette[5], &pu_palette[6], &pu_palette[7],
  49                 &pu_palette[8], &pu_palette[9], &pu_palette[10], &pu_palette[11],
  50                 &pu_palette[12], &pu_palette[13], &pu_palette[14], &pu_palette[15] ) == 16 )
  51     {
  52         vobsub_palette_rgb2yuv( 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     if( sscanf( psz_buf, "size: %dx%d",
  66                 pi_original_frame_width, pi_original_frame_height ) == 2 )
  67     {
  68         return VLC_SUCCESS;
  69     }
  70     else
  71     {
  72         return VLC_EGENERIC;
  73     }
  74 }
  75