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 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 #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_access = strdup( p_source->psz_access );
  53     s->psz_path = strdup( p_source->psz_path );
  54     if( !s->psz_path )
  55     {
  56         stream_CommonDelete( s );
  57         return NULL;
  58     }
  59     s->p_source = p_source;
  60
  61     /* */
  62     s->p_module = module_need( s, "stream_filter", psz_stream_filter, true );
  63
  64     if( !s->p_module )
  65     {
  66         stream_CommonDelete( s );
  67         return NULL;
  68     }
  69
  70     s->pf_destroy = StreamDelete;
  71
  72     return s;
  73 }
  74
  75 stream_t *stream_FilterChainNew( stream_t *p_source,
  76                                  const char *psz_chain,
  77                                  bool b_record )
  78 {
  79     /* Add auto stream filter */
  80     for( ;; )
  81     {
  82         stream_t *p_filter = stream_FilterNew( p_source, NULL );
  83         if( !p_filter )
  84             break;
  85
  86         msg_Dbg( p_filter, "Inserted a stream filter" );
  87         p_source = p_filter;
  88     }
  89
  90     /* Add user stream filter */
  91     char *psz_tmp = psz_chain ? strdup( psz_chain ) : NULL;
  92     char *psz = psz_tmp;
  93     while( psz && *psz )
  94     {
  95         stream_t *p_filter;
  96         char *psz_end = strchr( psz, ':' );
  97
  98         if( psz_end )
  99             *psz_end++ = '\0';
 100
 101         p_filter = stream_FilterNew( p_source, psz );
 102         if( p_filter )
 103             p_source = p_filter;
 104         else
 105             msg_Warn( p_source, "failed to insert stream filter %s", psz );
 106
 107         psz = psz_end;
 108     }
 109     free( psz_tmp );
 110
 111     /* Add record filter if useful */
 112     if( b_record )
 113     {
 114         stream_t *p_filter = stream_FilterNew( p_source,
 115                                                "stream_filter_record" );
 116         if( p_filter )
 117             p_source = p_filter;
 118     }
 119     return p_source;
 120 }
 121
 122 static void StreamDelete( stream_t *s )
 123 {
 124     module_unneed( s, s->p_module );
 125
 126     if( s->p_source )
 127         stream_Delete( s->p_source );
 128
 129     stream_CommonDelete( s );
 130 }