modules/stream_out/autodel.c

   1 /*****************************************************************************
   2  * autodel.c: monitor mux inputs and automatically add/delete streams
   3  *****************************************************************************
   4  * Copyright (C) 2006 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_plugin.h>
  34 #include <vlc_sout.h>
  35 #include <vlc_block.h>
  36
  37 /*****************************************************************************
  38  * Module descriptor
  39  *****************************************************************************/
  40 static int  Open    ( vlc_object_t * );
  41 static void Close   ( vlc_object_t * );
  42
  43 #define SOUT_CFG_PREFIX "sout-autodel-"
  44
  45 vlc_module_begin ()
  46     set_shortname( N_("Autodel"))
  47     set_description( N_("Automatically add/delete input streams"))
  48     set_capability( "sout stream", 50 )
  49     add_shortcut( "autodel" )
  50     set_callbacks( Open, Close )
  51 vlc_module_end ()
  52
  53
  54 /*****************************************************************************
  55  * Local prototypes
  56  *****************************************************************************/
  57 static sout_stream_id_t *Add   ( sout_stream_t *, es_format_t * );
  58 static int               Del   ( sout_stream_t *, sout_stream_id_t * );
  59 static int               Send  ( sout_stream_t *, sout_stream_id_t *, block_t * );
  60
  61 struct sout_stream_id_t
  62 {
  63     sout_stream_id_t *id;
  64     es_format_t fmt;
  65     mtime_t i_last;
  66     bool b_error;
  67 };
  68
  69 struct sout_stream_sys_t
  70 {
  71     sout_stream_id_t **pp_es;
  72     int i_es_num;
  73 };
  74
  75 /*****************************************************************************
  76  * Open:
  77  *****************************************************************************/
  78 static int Open( vlc_object_t *p_this )
  79 {
  80     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
  81     sout_stream_sys_t *p_sys;
  82
  83     p_sys          = malloc( sizeof( sout_stream_sys_t ) );
  84
  85     if( !p_stream->p_next )
  86     {
  87         msg_Err( p_stream, "cannot create chain" );
  88         free( p_sys );
  89         return VLC_EGENERIC;
  90     }
  91     p_sys->pp_es = NULL;
  92     p_sys->i_es_num = 0;
  93
  94     p_stream->pf_add    = Add;
  95     p_stream->pf_del    = Del;
  96     p_stream->pf_send   = Send;
  97
  98     p_stream->p_sys     = p_sys;
  99
 100     /* update p_sout->i_out_pace_nocontrol */
 101     p_stream->p_sout->i_out_pace_nocontrol++;
 102
 103     return VLC_SUCCESS;
 104 }
 105
 106 /*****************************************************************************
 107  * Close:
 108  *****************************************************************************/
 109 static void Close( vlc_object_t * p_this )
 110 {
 111     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 112     sout_stream_sys_t *p_sys = (sout_stream_sys_t *)p_stream->p_sys;
 113
 114     p_stream->p_sout->i_out_pace_nocontrol--;
 115
 116     free( p_sys );
 117 }
 118
 119 static sout_stream_id_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
 120 {
 121     sout_stream_sys_t *p_sys = (sout_stream_sys_t *)p_stream->p_sys;
 122     sout_stream_id_t *p_es = malloc( sizeof(sout_stream_id_t) );
 123
 124     p_es->fmt = *p_fmt;
 125     p_es->id = NULL;
 126     p_es->i_last = VLC_TS_INVALID;
 127     p_es->b_error = false;
 128     TAB_APPEND( p_sys->i_es_num, p_sys->pp_es, p_es );
 129
 130     return p_es;
 131 }
 132
 133 static int Del( sout_stream_t *p_stream, sout_stream_id_t *p_es )
 134 {
 135     sout_stream_sys_t *p_sys = (sout_stream_sys_t *)p_stream->p_sys;
 136     sout_stream_id_t *id = p_es->id;
 137
 138     TAB_REMOVE( p_sys->i_es_num, p_sys->pp_es, p_es );
 139     free( p_es );
 140
 141     if ( id != NULL )
 142         return p_stream->p_next->pf_del( p_stream->p_next, id );
 143     else
 144         return VLC_SUCCESS;
 145 }
 146
 147 static int Send( sout_stream_t *p_stream, sout_stream_id_t *p_es,
 148                  block_t *p_buffer )
 149 {
 150     sout_stream_sys_t *p_sys = (sout_stream_sys_t *)p_stream->p_sys;
 151     mtime_t i_current = mdate();
 152     int i;
 153
 154     p_es->i_last = p_buffer->i_dts;
 155     if ( !p_es->id && !p_es->b_error )
 156     {
 157         p_es->id = p_stream->p_next->pf_add( p_stream->p_next, &p_es->fmt );
 158         if ( p_es->id == NULL )
 159         {
 160             p_es->b_error = true;
 161             msg_Err( p_stream, "couldn't create chain for id %d",
 162                      p_es->fmt.i_id );
 163         }
 164     }
 165
 166     if ( !p_es->b_error )
 167         p_stream->p_next->pf_send( p_stream->p_next, p_es->id, p_buffer );
 168     else
 169         block_ChainRelease( p_buffer );
 170
 171     for ( i = 0; i < p_sys->i_es_num; i++ )
 172     {
 173         if ( p_sys->pp_es[i]->id != NULL
 174               && (p_sys->pp_es[i]->fmt.i_cat == VIDEO_ES
 175                    || p_sys->pp_es[i]->fmt.i_cat == AUDIO_ES)
 176               && p_sys->pp_es[i]->i_last < i_current )
 177         {
 178             p_stream->p_next->pf_del( p_stream->p_next, p_sys->pp_es[i]->id );
 179             p_sys->pp_es[i]->id = NULL;
 180         }
 181     }
 182
 183     return VLC_SUCCESS;
 184 }