duplicate.c
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上传日期:2009-03-27
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文件大小:13k
- /*****************************************************************************
- * duplicate.c: duplicate stream output module
- *****************************************************************************
- * Copyright (C) 2003-2004 VideoLAN
- * $Id: duplicate.c 8162 2004-07-10 17:20:59Z fenrir $
- *
- * Author: 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 <string.h>
- #include <vlc/vlc.h>
- #include <vlc/sout.h>
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Open ( vlc_object_t * );
- static void Close ( vlc_object_t * );
- vlc_module_begin();
- set_description( _("Duplicate stream output") );
- set_capability( "sout stream", 50 );
- add_shortcut( "duplicate" );
- add_shortcut( "dup" );
- 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_sys_t
- {
- int i_nb_streams;
- sout_stream_t **pp_streams;
- int i_nb_select;
- char **ppsz_select;
- };
- struct sout_stream_id_t
- {
- int i_nb_ids;
- void **pp_ids;
- };
- static vlc_bool_t ESSelected( es_format_t *fmt, char *psz_select );
- /*****************************************************************************
- * 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;
- sout_cfg_t *p_cfg;
- msg_Dbg( p_stream, "creating 'duplicate'" );
- p_sys = malloc( sizeof( sout_stream_sys_t ) );
- p_sys->i_nb_streams = 0;
- p_sys->pp_streams = NULL;
- p_sys->i_nb_select = 0;
- p_sys->ppsz_select = NULL;
- for( p_cfg = p_stream->p_cfg; p_cfg != NULL; p_cfg = p_cfg->p_next )
- {
- if( !strncmp( p_cfg->psz_name, "dst", strlen( "dst" ) ) )
- {
- sout_stream_t *s;
- msg_Dbg( p_stream, " * adding `%s'", p_cfg->psz_value );
- s = sout_StreamNew( p_stream->p_sout, p_cfg->psz_value );
- if( s )
- {
- TAB_APPEND( p_sys->i_nb_streams, p_sys->pp_streams, s );
- TAB_APPEND( p_sys->i_nb_select, p_sys->ppsz_select, NULL );
- }
- }
- else if( !strncmp( p_cfg->psz_name, "select", strlen( "select" ) ) )
- {
- char *psz = p_cfg->psz_value;
- if( p_sys->i_nb_select > 0 && psz && *psz )
- {
- msg_Dbg( p_stream, " * apply selection %s", psz );
- p_sys->ppsz_select[p_sys->i_nb_select - 1] = strdup( psz );
- }
- }
- }
- if( p_sys->i_nb_streams == 0 )
- {
- msg_Err( p_stream, "no destination given" );
- free( p_sys );
- return VLC_EGENERIC;
- }
- p_stream->pf_add = Add;
- p_stream->pf_del = Del;
- p_stream->pf_send = Send;
- p_stream->p_sys = p_sys;
- 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;
- msg_Dbg( p_stream, "closing a duplication" );
- for( i = 0; i < p_sys->i_nb_streams; i++ )
- {
- sout_StreamDelete( p_sys->pp_streams[i] );
- if( p_sys->ppsz_select[i] )
- {
- free( p_sys->ppsz_select[i] );
- }
- }
- if( p_sys->pp_streams )
- {
- free( p_sys->pp_streams );
- }
- if( p_sys->ppsz_select )
- {
- free( p_sys->ppsz_select );
- }
- 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_stream, i_valid_streams = 0;
- id = malloc( sizeof( sout_stream_id_t ) );
- id->i_nb_ids = 0;
- id->pp_ids = NULL;
- msg_Dbg( p_stream, "duplicated a new stream codec=%4.4s (es=%d group=%d)",
- (char*)&p_fmt->i_codec, p_fmt->i_id, p_fmt->i_group );
- for( i_stream = 0; i_stream < p_sys->i_nb_streams; i_stream++ )
- {
- void *id_new = NULL;
- if( ESSelected( p_fmt, p_sys->ppsz_select[i_stream] ) )
- {
- sout_stream_t *out = p_sys->pp_streams[i_stream];
- id_new = (void*)out->pf_add( out, p_fmt );
- if( id_new )
- {
- msg_Dbg( p_stream, " - added for output %d", i_stream );
- i_valid_streams++;
- }
- else
- {
- msg_Dbg( p_stream, " - failed for output %d", i_stream );
- }
- }
- else
- {
- msg_Dbg( p_stream, " - ignored for output %d", i_stream );
- }
- /* Append failed attempts as well to keep track of which pp_id
- * belongs to which duplicated stream */
- TAB_APPEND( id->i_nb_ids, id->pp_ids, id_new );
- }
- if( i_valid_streams <= 0 )
- {
- Del( p_stream, id );
- return NULL;
- }
- return id;
- }
- /*****************************************************************************
- * Del:
- *****************************************************************************/
- static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
- {
- sout_stream_sys_t *p_sys = p_stream->p_sys;
- int i_stream;
- for( i_stream = 0; i_stream < p_sys->i_nb_streams; i_stream++ )
- {
- if( id->pp_ids[i_stream] )
- {
- sout_stream_t *out = p_sys->pp_streams[i_stream];
- out->pf_del( out, id->pp_ids[i_stream] );
- }
- }
- free( id->pp_ids );
- free( id );
- 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;
- sout_stream_t *p_dup_stream;
- int i_stream;
- /* Loop through the linked list of buffers */
- while( p_buffer )
- {
- block_t *p_next = p_buffer->p_next;
- p_buffer->p_next = NULL;
- for( i_stream = 0; i_stream < p_sys->i_nb_streams - 1; i_stream++ )
- {
- block_t *p_dup;
- p_dup_stream = p_sys->pp_streams[i_stream];
- if( id->pp_ids[i_stream] )
- {
- p_dup = block_Duplicate( p_buffer );
- p_dup_stream->pf_send( p_dup_stream, id->pp_ids[i_stream],
- p_dup );
- }
- }
- if( i_stream < p_sys->i_nb_streams && id->pp_ids[i_stream] )
- {
- p_dup_stream = p_sys->pp_streams[i_stream];
- p_dup_stream->pf_send( p_dup_stream, id->pp_ids[i_stream],
- p_buffer );
- }
- else
- {
- block_Release( p_buffer );
- }
- p_buffer = p_next;
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Divers
- *****************************************************************************/
- static vlc_bool_t NumInRange( char *psz_range, int i_num )
- {
- char *psz = strchr( psz_range, '-' );
- char *end;
- int i_start, i_stop;
- if( psz )
- {
- i_start = strtol( psz_range, &end, 0 );
- if( end == psz_range ) i_start = i_num;
- i_stop = strtol( psz, &end, 0 );
- if( end == psz_range ) i_stop = i_num;
- }
- else
- {
- i_start = i_stop = strtol( psz_range, NULL, 0 );
- }
- return i_start <= i_num && i_num <= i_stop ? VLC_TRUE : VLC_FALSE;
- }
- static vlc_bool_t ESSelected( es_format_t *fmt, char *psz_select )
- {
- char *psz_dup;
- char *psz;
- /* We have tree state variable : no tested (-1), failed(0), succeed(1) */
- int i_cat = -1;
- int i_es = -1;
- int i_prgm= -1;
- /* If empty all es are selected */
- if( psz_select == NULL || *psz_select == ' ' )
- {
- return VLC_TRUE;
- }
- psz_dup = strdup( psz_select );
- psz = psz_dup;
- /* If non empty, parse the selection:
- * We have selection[,selection[,..]] where following selection are recognized:
- * (no(-))audio
- * (no(-))spu
- * (no(-))video
- * (no(-))es=[start]-[end] or es=num
- * (no(-))prgm=[start]-[end] or prgm=num (program works too)
- * if a negative test failed we exit directly
- */
- while( psz && *psz )
- {
- char *p;
- /* Skip space */
- while( *psz == ' ' || *psz == 't' ) psz++;
- /* Search end */
- p = strchr( psz, ',' );
- if( p == psz )
- {
- /* Empty */
- psz = p + 1;
- continue;
- }
- if( p )
- {
- *p++ = ' ';
- }
- if( !strncmp( psz, "no-audio", strlen( "no-audio" ) ) ||
- !strncmp( psz, "noaudio", strlen( "noaudio" ) ) )
- {
- if( i_cat != 1 )
- {
- i_cat = fmt->i_cat != AUDIO_ES ? 1 : 0;
- }
- }
- else if( !strncmp( psz, "no-video", strlen( "no-video" ) ) ||
- !strncmp( psz, "novideo", strlen( "novideo" ) ) )
- {
- if( i_cat != 1 )
- {
- i_cat = fmt->i_cat != VIDEO_ES ? 1 : 0;
- }
- }
- else if( !strncmp( psz, "no-spu", strlen( "no-spu" ) ) ||
- !strncmp( psz, "nospu", strlen( "nospu" ) ) )
- {
- if( i_cat != 1 )
- {
- i_cat = fmt->i_cat != SPU_ES ? 1 : 0;
- }
- }
- else if( !strncmp( psz, "audio", strlen( "audio" ) ) )
- {
- if( i_cat != 1 )
- {
- i_cat = fmt->i_cat == AUDIO_ES ? 1 : 0;
- }
- }
- else if( !strncmp( psz, "video", strlen( "video" ) ) )
- {
- if( i_cat != 1 )
- {
- i_cat = fmt->i_cat == VIDEO_ES ? 1 : 0;
- }
- }
- else if( !strncmp( psz, "spu", strlen( "spu" ) ) )
- {
- if( i_cat != 1 )
- {
- i_cat = fmt->i_cat == SPU_ES ? 1 : 0;
- }
- }
- else if( strchr( psz, '=' ) != NULL )
- {
- char *psz_arg = strchr( psz, '=' );
- *psz_arg++ = ' ';
- if( !strcmp( psz, "no-es" ) || !strcmp( psz, "noes" ) )
- {
- if( i_es != 1 )
- {
- i_es = !NumInRange( psz_arg, fmt->i_id ) ? 1 : 0;
- }
- }
- else if( !strcmp( psz, "es" ) )
- {
- if( i_es != 1 )
- {
- i_es = NumInRange( psz_arg, fmt->i_id) ? 1 : 0;
- }
- }
- else if( !strcmp( psz, "no-prgm" ) || !strcmp( psz, "noprgm" ) ||
- !strcmp( psz, "no-program" ) || !strcmp( psz, "noprogram" ) )
- {
- if( fmt->i_group >= 0 && i_prgm != 1 )
- {
- i_prgm = !NumInRange( psz_arg, fmt->i_group ) ? 1 : 0;
- }
- }
- else if( !strcmp( psz, "prgm" ) || !strcmp( psz, "program" ) )
- {
- if( fmt->i_group >= 0 && i_prgm != 1 )
- {
- i_prgm = NumInRange( psz_arg, fmt->i_group ) ? 1 : 0;
- }
- }
- }
- else
- {
- fprintf( stderr, "unknown args (%s)n", psz );
- }
- /* Next */
- psz = p;
- }
- free( psz_dup );
- if( i_cat == 0 || i_es == 0 || i_prgm == 0 )
- {
- /* One test failed */
- return VLC_FALSE;
- }
- return VLC_TRUE;
- }