modules/demux/subtitle_helper.h

   1 /*****************************************************************************
   2  * subtitle.h: subtitle helper functions
   3  *****************************************************************************
   4  * Copyright (C) 2015 VLC authors and VideoLAN
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 inline static char * peek_Readline( stream_t *p_demuxstream, uint64_t *pi_offset )
  22 {
  23     uint8_t *p_peek;
  24     ssize_t i_peek = vlc_stream_Peek( p_demuxstream, (const uint8_t **) &p_peek,
  25                                   *pi_offset + 2048 );
  26     if( i_peek < 0 || (uint64_t) i_peek < *pi_offset )
  27         return NULL;
  28
  29     const uint64_t i_bufsize = (uint64_t) i_peek - *pi_offset;
  30     char *psz_line = NULL;
  31
  32     /* Create a stream memory from that offset */
  33     stream_t *p_memorystream = vlc_stream_MemoryNew( p_demuxstream,
  34                                                      &p_peek[*pi_offset],
  35                                                      i_bufsize, true );
  36     if( p_memorystream )
  37     {
  38         psz_line = vlc_stream_ReadLine( p_memorystream );
  39
  40         *pi_offset += vlc_stream_Tell( p_memorystream );
  41         vlc_stream_Delete( p_memorystream );
  42     }
  43
  44     return psz_line;
  45 }