tcp.c
上传用户:riyaled888
上传日期:2009-03-27
资源大小:7338k
文件大小:7k
- /*****************************************************************************
- * tcp.c: TCP input module
- *****************************************************************************
- * Copyright (C) 2003-2004 VideoLAN
- * $Id: tcp.c 8606 2004-08-31 18:32:54Z hartman $
- *
- * 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 "network.h"
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- #define CACHING_TEXT N_("Caching value in ms")
- #define CACHING_LONGTEXT N_(
- "Allows you to modify the default caching value for TCP streams. This "
- "value should be set in millisecond units." )
- static int Open ( vlc_object_t * );
- static void Close( vlc_object_t * );
- vlc_module_begin();
- set_description( _("TCP input") );
- add_integer( "tcp-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT,
- CACHING_LONGTEXT, VLC_TRUE );
- set_capability( "access2", 0 );
- add_shortcut( "tcp" );
- set_callbacks( Open, Close );
- vlc_module_end();
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- struct access_sys_t
- {
- int fd;
- };
- static int Read( access_t *, uint8_t *, int );
- static int Control( access_t *, int, va_list );
- /*****************************************************************************
- * Open: open the socket
- *****************************************************************************/
- static int Open( vlc_object_t *p_this )
- {
- access_t *p_access = (access_t *)p_this;
- access_sys_t *p_sys;
- char *psz_dup = strdup(p_access->psz_path);
- char *psz_parser = psz_dup;
- /* Parse server:port */
- while( *psz_parser && *psz_parser != ':' )
- {
- if( *psz_parser == '[' )
- {
- /* IPV6 */
- while( *psz_parser && *psz_parser != ']' )
- {
- psz_parser++;
- }
- }
- psz_parser++;
- }
- if( *psz_parser != ':' || psz_parser == psz_dup )
- {
- msg_Err( p_access, "you have to provide server:port addresse" );
- free( psz_dup );
- return VLC_EGENERIC;
- }
- *psz_parser++ = ' ';
- if( atoi( psz_parser ) <= 0 )
- {
- msg_Err( p_access, "invalid port number (%d)", atoi( psz_parser ) );
- free( psz_dup );
- return VLC_EGENERIC;
- }
- /* Init p_access */
- p_access->pf_read = Read;
- p_access->pf_block = NULL;
- p_access->pf_control = Control;
- p_access->pf_seek = NULL;
- p_access->info.i_update = 0;
- p_access->info.i_size = 0;
- p_access->info.i_pos = 0;
- p_access->info.b_eof = VLC_FALSE;
- p_access->info.i_title = 0;
- p_access->info.i_seekpoint = 0;
- p_access->p_sys = p_sys = malloc( sizeof( access_sys_t ) );
- p_sys->fd = net_OpenTCP( p_access, psz_dup, atoi( psz_parser ) );
- free( psz_dup );
- if( p_sys->fd < 0 )
- {
- free( p_sys );
- return VLC_EGENERIC;
- }
- /* Update default_pts to a suitable value for udp access */
- var_Create( p_access, "tcp-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Close: free unused data structures
- *****************************************************************************/
- static void Close( vlc_object_t *p_this )
- {
- access_t *p_access = (access_t *)p_this;
- access_sys_t *p_sys = p_access->p_sys;
- net_Close( p_sys->fd );
- free( p_sys );
- }
- /*****************************************************************************
- * Read: read on a file descriptor, checking b_die periodically
- *****************************************************************************/
- static int Read( access_t *p_access, uint8_t *p_buffer, int i_len )
- {
- access_sys_t *p_sys = p_access->p_sys;
- int i_read;
- if( p_access->info.b_eof )
- return 0;
- i_read = net_Read( p_access, p_sys->fd, p_buffer, i_len, VLC_FALSE );
- if( i_read == 0 )
- p_access->info.b_eof = VLC_TRUE;
- else if( i_read > 0 )
- p_access->info.i_pos += i_read;
- return i_read;
- }
- /*****************************************************************************
- * Control:
- *****************************************************************************/
- static int Control( access_t *p_access, int i_query, va_list args )
- {
- vlc_bool_t *pb_bool;
- int *pi_int;
- int64_t *pi_64;
- switch( i_query )
- {
- /* */
- case ACCESS_CAN_SEEK:
- case ACCESS_CAN_FASTSEEK:
- pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t* );
- *pb_bool = VLC_FALSE;
- break;
- case ACCESS_CAN_PAUSE:
- pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t* );
- *pb_bool = VLC_TRUE; /* FIXME */
- break;
- case ACCESS_CAN_CONTROL_PACE:
- pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t* );
- *pb_bool = VLC_TRUE; /* FIXME */
- break;
- /* */
- case ACCESS_GET_MTU:
- pi_int = (int*)va_arg( args, int * );
- *pi_int = 0;
- break;
- case ACCESS_GET_PTS_DELAY:
- pi_64 = (int64_t*)va_arg( args, int64_t * );
- *pi_64 = (int64_t)var_GetInteger( p_access, "tcp-caching" ) * I64C(1000);
- break;
- /* */
- case ACCESS_SET_PAUSE_STATE:
- /* Nothing to do */
- break;
- case ACCESS_GET_TITLE_INFO:
- case ACCESS_SET_TITLE:
- case ACCESS_SET_SEEKPOINT:
- case ACCESS_SET_PRIVATE_ID_STATE:
- return VLC_EGENERIC;
- default:
- msg_Warn( p_access, "unimplemented query in control" );
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }