input.c
上传用户:riyaled888
上传日期:2009-03-27
资源大小:7338k
文件大小:7k
- /*****************************************************************************
- * input_dummy.c: dummy input plugin, to manage "vlc:***" special options
- *****************************************************************************
- * Copyright (C) 2001, 2002 VideoLAN
- * $Id: input.c 8268 2004-07-24 11:57:47Z fenrir $
- *
- * Authors: Samuel Hocevar <sam@zoy.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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <stdlib.h>
- #include <string.h>
- #include <vlc/vlc.h>
- #include <vlc/intf.h>
- #include <vlc/input.h>
- /*****************************************************************************
- * Access functions.
- *****************************************************************************/
- static int AccessRead( access_t *p_access, uint8_t *p, int i_size )
- {
- memset( p, 0, i_size );
- return i_size;
- }
- static int AccessControl( 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:
- case ACCESS_CAN_PAUSE:
- case ACCESS_CAN_CONTROL_PACE:
- pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t* );
- *pb_bool = VLC_FALSE;
- 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 = DEFAULT_PTS_DELAY * 1000;
- break;
- /* */
- case ACCESS_SET_PAUSE_STATE:
- case ACCESS_GET_TITLE_INFO:
- case ACCESS_SET_TITLE:
- case ACCESS_SET_SEEKPOINT:
- return VLC_EGENERIC;
- default:
- msg_Err( p_access, "unimplemented query in control" );
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }
- int E_(OpenAccess)( vlc_object_t *p_this )
- {
- access_t *p_access = (access_t*)p_this;
- /* Init p_access */
- p_access->pf_read = AccessRead;
- p_access->pf_block = NULL;
- p_access->pf_seek = NULL;
- p_access->pf_control = AccessControl;
- 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 = NULL;
- /* Force dummy demux plug-in */
- p_access->psz_demux = strdup( "vlc" );
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Demux
- *****************************************************************************/
- struct demux_sys_t
- {
- /* The real command */
- int i_command;
- /* Used for the pause command */
- mtime_t expiration;
- };
- enum
- {
- COMMAND_NOP = 0,
- COMMAND_QUIT = 1,
- COMMAND_LOOP = 2,
- COMMAND_PAUSE= 3,
- };
- static int Demux( demux_t * );
- static int DemuxControl( demux_t *, int, va_list );
- /*****************************************************************************
- * OpenDemux: initialize the target, ie. parse the command
- *****************************************************************************/
- int E_(OpenDemux) ( vlc_object_t *p_this )
- {
- demux_t *p_demux = (demux_t*)p_this;
- char * psz_name = p_demux->psz_path;
- int i_len = strlen( psz_name );
- demux_sys_t *p_sys;
- int i_arg;
- p_demux->pf_demux = Demux;
- p_demux->pf_control = DemuxControl;
- p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
- /* Check for a "vlc:nop" command */
- if( i_len == 3 && !strncasecmp( psz_name, "nop", 3 ) )
- {
- msg_Info( p_demux, "command `nop'" );
- p_sys->i_command = COMMAND_NOP;
- return VLC_SUCCESS;
- }
- /* Check for a "vlc:quit" command */
- if( i_len == 4 && !strncasecmp( psz_name, "quit", 4 ) )
- {
- msg_Info( p_demux, "command `quit'" );
- p_sys->i_command = COMMAND_QUIT;
- return VLC_SUCCESS;
- }
- /* Check for a "vlc:loop" command */
- if( i_len == 4 && !strncasecmp( psz_name, "loop", 4 ) )
- {
- msg_Info( p_demux, "command `loop'" );
- p_sys->i_command = COMMAND_LOOP;
- return VLC_SUCCESS;
- }
- /* Check for a "vlc:pause:***" command */
- if( i_len > 6 && !strncasecmp( psz_name, "pause:", 6 ) )
- {
- i_arg = atoi( psz_name + 6 );
- msg_Info( p_demux, "command `pause %i'", i_arg );
- p_sys->i_command = COMMAND_PAUSE;
- p_sys->expiration = mdate() + (mtime_t)i_arg * (mtime_t)1000000;
- return VLC_SUCCESS;
- }
- msg_Err( p_demux, "unknown command `%s'", psz_name );
- free( p_sys );
- return VLC_EGENERIC;
- }
- /*****************************************************************************
- * CloseDemux: initialize the target, ie. parse the command
- *****************************************************************************/
- void E_(CloseDemux) ( vlc_object_t *p_this )
- {
- demux_t *p_demux = (demux_t*)p_this;
- free( p_demux->p_sys );
- }
- /*****************************************************************************
- * Demux: do what the command says
- *****************************************************************************/
- static int Demux( demux_t *p_demux )
- {
- demux_sys_t *p_sys = p_demux->p_sys;
- playlist_t *p_playlist;
- vlc_bool_t b_eof = VLC_FALSE;
- p_playlist = vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST, FIND_PARENT );
- if( p_playlist == NULL )
- {
- msg_Err( p_demux, "we are not attached to a playlist" );
- return -1;
- }
- switch( p_sys->i_command )
- {
- case COMMAND_QUIT:
- b_eof = p_demux->p_vlc->b_die = VLC_TRUE;
- break;
- case COMMAND_LOOP:
- playlist_Goto( p_playlist, 0 );
- break;
- case COMMAND_PAUSE:
- if( mdate() >= p_sys->expiration )
- b_eof = VLC_TRUE;
- else
- msleep( 10000 );
- break;
- case COMMAND_NOP:
- default:
- b_eof = VLC_TRUE;
- break;
- }
- vlc_object_release( p_playlist );
- return b_eof ? 0 : 1;
- }
- static int DemuxControl( demux_t *p_demux, int i_query, va_list args )
- {
- return demux2_vaControlHelper( p_demux->s,
- 0, 0, 0, 1,
- i_query, args );
- }