vlc_access.h
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上传日期:2009-03-27
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- /*****************************************************************************
- * vlc_access.h
- *****************************************************************************
- * Copyright (C) 1999-2004 VideoLAN
- * $Id: vlc_access.h 8641 2004-09-03 18:42:25Z massiot $
- *
- * 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.
- *****************************************************************************/
- #ifndef _VLC_ACCESS_H
- #define _VLC_ACCESS_H 1
- /**
- * defgroup access Access
- * @{
- */
- enum access_query_e
- {
- /* capabilities */
- ACCESS_CAN_SEEK, /* arg1= vlc_bool_t* cannot fail */
- ACCESS_CAN_FASTSEEK, /* arg1= vlc_bool_t* cannot fail */
- ACCESS_CAN_PAUSE, /* arg1= vlc_bool_t* cannot fail */
- ACCESS_CAN_CONTROL_PACE,/* arg1= vlc_bool_t* cannot fail */
- /* */
- ACCESS_GET_MTU, /* arg1= int* cannot fail(0 if no sense)*/
- ACCESS_GET_PTS_DELAY, /* arg1= int64_t* cannot fail */
- /* */
- ACCESS_GET_TITLE_INFO, /* arg1=input_title_t*** arg2=int* can fail */
- /* Meta data */
- ACCESS_GET_META, /* arg1= vlc_meta_t ** res=can fail */
- /* */
- ACCESS_SET_PAUSE_STATE, /* arg1= vlc_bool_t can fail */
- /* */
- ACCESS_SET_TITLE, /* arg1= int can fail */
- ACCESS_SET_SEEKPOINT, /* arg1= int can fail */
- /* Special mode for access/demux communication
- * XXX: avoid to use it unless you can't */
- ACCESS_SET_PRIVATE_ID_STATE, /* arg1= int i_private_data, vlc_bool_t b_selected can fail */
- ACCESS_SET_PRIVATE_ID_CA, /* arg1= int i_program_number, uint16_t i_vpid, uint16_t i_apid1, uint16_t i_apid2, uint16_t i_apid3, uint8_t i_length, uint8_t *p_data */
- };
- struct access_t
- {
- VLC_COMMON_MEMBERS
- /* Module properties */
- module_t *p_module;
- /* Access name (empty if non forced) */
- char *psz_access;
- /* Access path/url/filename/.... */
- char *psz_path;
- /* Access can fill this entry to force a demuxer
- * XXX: fill it once you know for sure you will succed
- * (if you fail, this value won't be reseted */
- char *psz_demux;
- /* pf_read/pf_block is used to read data.
- * XXX A access should set one and only one of them */
- int (*pf_read) ( access_t *, uint8_t *, int ); /* Return -1 if no data yet, 0 if no more data, else real data read */
- block_t *(*pf_block)( access_t * ); /* return a block of data in his 'natural' size, NULL if not yet data or eof */
- /* Called for each seek.
- * XXX can be null */
- int (*pf_seek) ( access_t *, int64_t ); /* can be null if can't seek */
- /* Used to retreive and configure the access
- * XXX mandatory. look at access_query_e to know what query you *have to* support */
- int (*pf_control)( access_t *, int i_query, va_list args);
- /* Access has to maintain them uptodate */
- struct
- {
- unsigned int i_update; /* Access sets them on change,
- Input removes them once take into account*/
- int64_t i_size; /* Write only for access, read only for input */
- int64_t i_pos; /* idem */
- vlc_bool_t b_eof; /* idem */
- int i_title; /* idem, start from 0 (could be menu) */
- int i_seekpoint;/* idem, start from 0 */
- } info;
- access_sys_t *p_sys;
- };
- #define access2_New( a, b, c, d ) __access2_New(VLC_OBJECT(a), b, c, d )
- VLC_EXPORT( access_t *, __access2_New, ( vlc_object_t *p_obj, char *psz_access, char *psz_demux, char *psz_path ) );
- VLC_EXPORT( void, access2_Delete, ( access_t * ) );
- static inline int access2_vaControl( access_t *p_access, int i_query, va_list args )
- {
- return p_access->pf_control( p_access, i_query, args );
- }
- static inline int access2_Control( access_t *p_access, int i_query, ... )
- {
- va_list args;
- int i_result;
- va_start( args, i_query );
- i_result = access2_vaControl( p_access, i_query, args );
- va_end( args );
- return i_result;
- }
- #endif