gather.c
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上传日期:2009-03-27
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- /*****************************************************************************
- * gather.c: gathering stream output module
- *****************************************************************************
- * Copyright (C) 2003-2004 VideoLAN
- * $Id: gather.c 8162 2004-07-10 17:20:59Z fenrir $
- *
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <stdlib.h>
- #include <vlc/vlc.h>
- #include <vlc/input.h>
- #include <vlc/sout.h>
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Open ( vlc_object_t * );
- static void Close ( vlc_object_t * );
- vlc_module_begin();
- set_description( _("Gathering stream output") );
- set_capability( "sout stream", 50 );
- add_shortcut( "gather" );
- set_callbacks( Open, Close );
- vlc_module_end();
- /*****************************************************************************
- * Exported prototypes
- *****************************************************************************/
- static sout_stream_id_t *Add ( sout_stream_t *, es_format_t * );
- static int Del ( sout_stream_t *, sout_stream_id_t * );
- static int Send( sout_stream_t *, sout_stream_id_t *,
- block_t* );
- struct sout_stream_id_t
- {
- vlc_bool_t b_used;
- es_format_t fmt;
- void *id;
- };
- struct sout_stream_sys_t
- {
- sout_stream_t *p_out;
- int i_id;
- sout_stream_id_t **id;
- };
- /*****************************************************************************
- * Open:
- *****************************************************************************/
- static int Open( vlc_object_t *p_this )
- {
- sout_stream_t *p_stream = (sout_stream_t*)p_this;
- sout_stream_sys_t *p_sys;
- p_stream->p_sys = p_sys = malloc( sizeof( sout_stream_sys_t ) );
- p_sys->p_out = sout_StreamNew( p_stream->p_sout, p_stream->psz_next );
- if( p_sys->p_out == NULL )
- {
- free( p_sys );
- return VLC_EGENERIC;
- }
- p_sys->i_id = 0;
- p_sys->id = NULL;
- p_stream->pf_add = Add;
- p_stream->pf_del = Del;
- p_stream->pf_send = Send;
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Close:
- *****************************************************************************/
- static void Close( vlc_object_t * p_this )
- {
- sout_stream_t *p_stream = (sout_stream_t*)p_this;
- sout_stream_sys_t *p_sys = p_stream->p_sys;
- int i;
- for( i = 0; i < p_sys->i_id; i++ )
- {
- p_sys->p_out->pf_del( p_sys->p_out, p_sys->id[i]->id );
- free( p_sys->id[i] );
- }
- free( p_sys->id );
- sout_StreamDelete( p_sys->p_out );
- free( p_sys );
- }
- /*****************************************************************************
- * Add:
- *****************************************************************************/
- static sout_stream_id_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
- {
- sout_stream_sys_t *p_sys = p_stream->p_sys;
- sout_stream_id_t *id;
- int i;
- /* search a output compatible */
- for( i = 0; i < p_sys->i_id; i++ )
- {
- id = p_sys->id[i];
- if( !id->b_used &&
- id->fmt.i_cat == p_fmt->i_cat &&
- id->fmt.i_codec == p_fmt->i_codec &&
- ( ( id->fmt.i_cat == AUDIO_ES &&
- id->fmt.audio.i_rate == p_fmt->audio.i_rate &&
- id->fmt.audio.i_channels == p_fmt->audio.i_channels &&
- id->fmt.audio.i_blockalign == p_fmt->audio.i_blockalign ) ||
- ( id->fmt.i_cat == VIDEO_ES &&
- id->fmt.video.i_width == p_fmt->video.i_width &&
- id->fmt.video.i_height == p_fmt->video.i_height ) ) )
- {
- msg_Dbg( p_stream, "reusing already opened output" );
- id->b_used = VLC_TRUE;
- return id;
- }
- }
- /* destroy all output of the same categorie */
- for( i = 0; i < p_sys->i_id; i++ )
- {
- id = p_sys->id[i];
- if( !id->b_used && id->fmt.i_cat == p_fmt->i_cat )
- {
- TAB_REMOVE( p_sys->i_id, p_sys->id, id );
- p_sys->p_out->pf_del( p_sys->p_out, id );
- free( id );
- i = 0;
- continue;
- }
- }
- id = malloc( sizeof( sout_stream_id_t ) );
- msg_Dbg( p_stream, "creating new output" );
- memcpy( &id->fmt, p_fmt, sizeof( es_format_t ) );
- id->fmt.i_extra = 0;
- id->fmt.p_extra = NULL;
- id->b_used = VLC_TRUE;
- id->id = p_sys->p_out->pf_add( p_sys->p_out, p_fmt );
- if( id->id == NULL )
- {
- free( id );
- return NULL;
- }
- TAB_APPEND( p_sys->i_id, p_sys->id, id );
- return id;
- }
- /*****************************************************************************
- * Del:
- *****************************************************************************/
- static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
- {
- id->b_used = VLC_FALSE;
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Send:
- *****************************************************************************/
- static int Send( sout_stream_t *p_stream,
- sout_stream_id_t *id, block_t *p_buffer )
- {
- sout_stream_sys_t *p_sys = p_stream->p_sys;
- return p_sys->p_out->pf_send( p_sys->p_out, id->id, p_buffer );
- }