podcast.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:9k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * podcast.c: Podcast services discovery module
- *****************************************************************************
- * Copyright (C) 2005-2009 the VideoLAN team
- * $Id: 83c92c12bfd7e306fba5d1e9776e7f3f680e495f $
- *
- * Authors: Antoine Cellerier <dionoea -at- videolan -dot- org>
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Includes
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include <vlc_plugin.h>
- #include <vlc_playlist.h>
- #include <vlc_services_discovery.h>
- #include <vlc_network.h>
- #include <assert.h>
- #include <errno.h> /* ENOMEM */
- #ifdef HAVE_UNISTD_H
- # include <unistd.h>
- #endif
- #ifdef HAVE_SYS_TIME_H
- # include <sys/time.h>
- #endif
- /************************************************************************
- * Macros and definitions
- ************************************************************************/
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- /* Callbacks */
- static int Open ( vlc_object_t * );
- static void Close( vlc_object_t * );
- #define URLS_TEXT N_("Podcast URLs list")
- #define URLS_LONGTEXT N_("Enter the list of podcasts to retrieve, "
- "separated by '|' (pipe)." )
- vlc_module_begin ()
- set_shortname( "Podcast")
- set_description( N_("Podcasts") )
- set_category( CAT_PLAYLIST )
- set_subcategory( SUBCAT_PLAYLIST_SD )
- add_string( "podcast-urls", NULL, NULL,
- URLS_TEXT, URLS_LONGTEXT, false )
- change_autosave ()
- set_capability( "services_discovery", 0 )
- set_callbacks( Open, Close )
- vlc_module_end ()
- /*****************************************************************************
- * Local structures
- *****************************************************************************/
- struct services_discovery_sys_t
- {
- /* playlist node */
- input_thread_t **pp_input;
- int i_input;
- char **ppsz_urls;
- int i_urls;
- vlc_thread_t thread;
- vlc_mutex_t lock;
- vlc_cond_t wait;
- bool b_update;
- };
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static void *Run( void * );
- static int UrlsChange( vlc_object_t *, char const *, vlc_value_t,
- vlc_value_t, void * );
- static void ParseUrls( services_discovery_t *p_sd, char *psz_urls );
- /*****************************************************************************
- * Open: initialize and create stuff
- *****************************************************************************/
- static int Open( vlc_object_t *p_this )
- {
- services_discovery_t *p_sd = ( services_discovery_t* )p_this;
- services_discovery_sys_t *p_sys = malloc(
- sizeof( services_discovery_sys_t ) );
- if( !p_sys )
- return VLC_ENOMEM;
- p_sys->i_urls = 0;
- p_sys->ppsz_urls = NULL;
- p_sys->i_input = 0;
- p_sys->pp_input = NULL;
- vlc_mutex_init( &p_sys->lock );
- vlc_cond_init( &p_sys->wait );
- p_sys->b_update = true;
- p_sd->p_sys = p_sys;
- /* Launch the callback associated with this variable */
- var_Create( p_sd, "podcast-urls", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
- var_AddCallback( p_sd, "podcast-urls", UrlsChange, p_sys );
- if (vlc_clone (&p_sys->thread, Run, p_sd, VLC_THREAD_PRIORITY_LOW))
- {
- var_DelCallback( p_sd, "podcast-urls", UrlsChange, p_sys );
- vlc_cond_destroy( &p_sys->wait );
- vlc_mutex_destroy( &p_sys->lock );
- free (p_sys);
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Close:
- *****************************************************************************/
- static void Close( vlc_object_t *p_this )
- {
- services_discovery_t *p_sd = ( services_discovery_t* )p_this;
- services_discovery_sys_t *p_sys = p_sd->p_sys;
- int i;
- vlc_cancel (p_sys->thread);
- vlc_join (p_sys->thread, NULL);
- var_DelCallback( p_sd, "podcast-urls", UrlsChange, p_sys );
- vlc_cond_destroy( &p_sys->wait );
- vlc_mutex_destroy( &p_sys->lock );
- for( i = 0; i < p_sys->i_input; i++ )
- {
- input_thread_t *p_input = p_sd->p_sys->pp_input[i];
- if( !p_input )
- continue;
- input_Stop( p_input, true );
- vlc_thread_join( p_input );
- vlc_object_release( p_input );
- p_sd->p_sys->pp_input[i] = NULL;
- }
- free( p_sd->p_sys->pp_input );
- for( i = 0; i < p_sys->i_urls; i++ ) free( p_sys->ppsz_urls[i] );
- free( p_sys->ppsz_urls );
- free( p_sys );
- }
- /*****************************************************************************
- * Run: main thread
- *****************************************************************************/
- static void *Run( void *data )
- {
- services_discovery_t *p_sd = data;
- services_discovery_sys_t *p_sys = p_sd->p_sys;
- vlc_mutex_lock( &p_sys->lock );
- mutex_cleanup_push( &p_sys->lock );
- for( ;; )
- {
- while( !p_sys->b_update )
- vlc_cond_wait( &p_sys->wait, &p_sys->lock );
- int canc = vlc_savecancel ();
- msg_Dbg( p_sd, "Update required" );
- char* psz_urls = var_GetNonEmptyString( p_sd, "podcast-urls" );
- if( psz_urls != NULL )
- ParseUrls( p_sd, psz_urls );
- free( psz_urls );
- p_sys->b_update = false;
- for( int i = 0; i < p_sd->p_sys->i_input; i++ )
- {
- input_thread_t *p_input = p_sd->p_sys->pp_input[i];
- if( p_input->b_eof || p_input->b_error )
- {
- input_Stop( p_input, false );
- vlc_thread_join( p_input );
- vlc_object_release( p_input );
- p_sd->p_sys->pp_input[i] = NULL;
- REMOVE_ELEM( p_sys->pp_input, p_sys->i_input, i );
- i--;
- }
- }
- vlc_restorecancel (canc);
- }
- vlc_cleanup_pop();
- assert(0); /* dead code */
- }
- static int UrlsChange( vlc_object_t *p_this, char const *psz_var,
- vlc_value_t oldval, vlc_value_t newval,
- void *p_data )
- {
- VLC_UNUSED(p_this); VLC_UNUSED(psz_var); VLC_UNUSED(oldval);
- VLC_UNUSED(newval);
- services_discovery_sys_t *p_sys = (services_discovery_sys_t *)p_data;
- vlc_mutex_lock( &p_sys->lock );
- p_sys->b_update = true;
- vlc_cond_signal( &p_sys->wait );
- vlc_mutex_unlock( &p_sys->lock );
- return VLC_SUCCESS;
- }
- static void ParseUrls( services_discovery_t *p_sd, char *psz_urls )
- {
- services_discovery_sys_t *p_sys = p_sd->p_sys;
- for( ;; )
- {
- int i;
- char *psz_tok = strchr( psz_urls, '|' );
- if( psz_tok ) *psz_tok = ' ';
- for( i = 0; i < p_sys->i_urls; i++ )
- if( !strcmp( psz_urls, p_sys->ppsz_urls[i] ) )
- break;
- if( i == p_sys->i_urls )
- {
- /* Only add new urls.
- * FIXME: We don't delete urls which have been removed from
- * the config since we don't have a way to know which inputs
- * they spawned */
- input_item_t *p_input;
- INSERT_ELEM( p_sys->ppsz_urls, p_sys->i_urls, p_sys->i_urls,
- strdup( psz_urls ) );
- p_input = input_item_New( p_sd, psz_urls, psz_urls );
- input_item_AddOption( p_input, "demux=podcast", VLC_INPUT_OPTION_TRUSTED );
- services_discovery_AddItem( p_sd, p_input, NULL /* no cat */ );
- vlc_gc_decref( p_input );
- INSERT_ELEM( p_sys->pp_input, p_sys->i_input, p_sys->i_input,
- input_CreateAndStart( p_sd, p_input, NULL ) );
- }
- if( psz_tok ) psz_urls = psz_tok+1;
- else return;
- }
- }