src/input/stream_filter.c

   1 /*****************************************************************************
   2  * stream_filter.c
   3  *****************************************************************************
   4  * Copyright (C) 2008 Laurent Aimar
   5  * $Id$
   6  *
   7  * Author: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 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 General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include <vlc_common.h>
  29 #include <vlc_stream.h>
  30 #include <vlc_modules.h>
  31 #include <libvlc.h>
  32
  33 #include <assert.h>
  34
  35 #include "stream.h"
  36
  37 static void StreamDelete( stream_t * );
  38
  39 stream_t *stream_FilterNew( stream_t *p_source,
  40                             const char *psz_stream_filter )
  41 {
  42     stream_t *s;
  43     assert( p_source != NULL );
  44
  45     s = stream_CommonNew( VLC_OBJECT( p_source ) );
  46     if( s == NULL )
  47         return NULL;
  48
  49     s->p_input = p_source->p_input;
  50
  51     /* */
  52     s->psz_path = strdup( p_source->psz_path );
  53     if( !s->psz_path )
  54     {
  55         stream_CommonDelete( s );
  56         return NULL;
  57     }
  58     s->p_source = p_source;
  59
  60     /* */
  61     vlc_object_attach( s, p_source );
  62
  63     s->p_module = module_need( s, "stream_filter", psz_stream_filter, true );
  64
  65     if( !s->p_module )
  66     {
  67         stream_CommonDelete( s );
  68         return NULL;
  69     }
  70
  71     s->pf_destroy = StreamDelete;
  72
  73     return s;
  74 }
  75
  76 stream_t *stream_FilterChainNew( stream_t *p_source,
  77                                  const char *psz_chain,
  78                                  bool b_record )
  79 {
  80     /* Add auto stream filter */
  81     for( ;; )
  82     {
  83         stream_t *p_filter = stream_FilterNew( p_source, NULL );
  84         if( !p_filter )
  85             break;
  86
  87         msg_Dbg( p_filter, "Inserted a stream filter" );
  88         p_source = p_filter;
  89     }
  90
  91     /* Add user stream filter */
  92     char *psz_tmp = psz_chain ? strdup( psz_chain ) : NULL;
  93     char *psz = psz_tmp;
  94     while( psz && *psz )
  95     {
  96         stream_t *p_filter;
  97         char *psz_end = strchr( psz, ':' );
  98
  99         if( psz_end )
 100             *psz_end++ = '\0';
 101
 102         p_filter = stream_FilterNew( p_source, psz );
 103         if( p_filter )
 104             p_source = p_filter;
 105         else
 106             msg_Warn( p_source, "failed to insert stream filter %s", psz );
 107
 108         psz = psz_end;
 109     }
 110     free( psz_tmp );
 111
 112     /* Add record filter if useful */
 113     if( b_record )
 114     {
 115         stream_t *p_filter = stream_FilterNew( p_source,
 116                                                "stream_filter_record" );
 117         if( p_filter )
 118             p_source = p_filter;
 119     }
 120     return p_source;
 121 }
 122
 123 static void StreamDelete( stream_t *s )
 124 {
 125     module_unneed( s, s->p_module );
 126
 127     if( s->p_source )
 128         stream_Delete( s->p_source );
 129
 130     stream_CommonDelete( s );
 131 }
 132