1 /*****************************************************************************
2 * vlc_access.h: Access descriptor, queries and methods
3 *****************************************************************************
4 * Copyright (C) 1999-2004 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
25 #define _VLC_ACCESS_H 1
28 * \defgroup access Access
35 ACCESS_CAN_SEEK, /* arg1= vlc_bool_t* cannot fail */
36 ACCESS_CAN_FASTSEEK, /* arg1= vlc_bool_t* cannot fail */
37 ACCESS_CAN_PAUSE, /* arg1= vlc_bool_t* cannot fail */
38 ACCESS_CAN_CONTROL_PACE,/* arg1= vlc_bool_t* cannot fail */
41 ACCESS_GET_MTU, /* arg1= int* cannot fail(0 if no sense)*/
42 ACCESS_GET_PTS_DELAY, /* arg1= int64_t* cannot fail */
44 ACCESS_GET_TITLE_INFO, /* arg1=input_title_t*** arg2=int* can fail */
46 ACCESS_GET_META, /* arg1= vlc_meta_t ** res=can fail */
49 ACCESS_SET_PAUSE_STATE, /* arg1= vlc_bool_t can fail */
52 ACCESS_SET_TITLE, /* arg1= int can fail */
53 ACCESS_SET_SEEKPOINT, /* arg1= int can fail */
55 /* Special mode for access/demux communication
56 * XXX: avoid to use it unless you can't */
57 ACCESS_SET_PRIVATE_ID_STATE, /* arg1= int i_private_data, vlc_bool_t b_selected can fail */
58 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 */
59 ACCESS_GET_PRIVATE_ID_STATE /* arg1=int i_private_data arg2=vlc_bool_t * res=can fail */
66 /* Module properties */
69 /* Access name (empty if non forced) */
71 /* Access path/url/filename/.... */
73 /* Access source for access_filter (NULL for regular access) */
76 /* Access can fill this entry to force a demuxer
77 * XXX: fill it once you know for sure you will succed
78 * (if you fail, this value won't be reseted */
81 /* pf_read/pf_block is used to read data.
82 * XXX A access should set one and only one of them */
83 int (*pf_read) ( access_t *, uint8_t *, int ); /* Return -1 if no data yet, 0 if no more data, else real data read */
84 block_t *(*pf_block)( access_t * ); /* return a block of data in his 'natural' size, NULL if not yet data or eof */
86 /* Called for each seek.
88 int (*pf_seek) ( access_t *, int64_t ); /* can be null if can't seek */
90 /* Used to retreive and configure the access
91 * XXX mandatory. look at access_query_e to know what query you *have to* support */
92 int (*pf_control)( access_t *, int i_query, va_list args);
94 /* Access has to maintain them uptodate */
97 unsigned int i_update; /* Access sets them on change,
98 Input removes them once take into account*/
100 int64_t i_size; /* Write only for access, read only for input */
101 int64_t i_pos; /* idem */
102 vlc_bool_t b_eof; /* idem */
104 int i_title; /* idem, start from 0 (could be menu) */
105 int i_seekpoint;/* idem, start from 0 */
107 vlc_bool_t b_prebuffered; /* Read only for input */
112 #define access2_New( a, b, c, d, e ) __access2_New(VLC_OBJECT(a), b, c, d, e )
113 VLC_EXPORT( access_t *, __access2_New, ( vlc_object_t *p_obj, char *psz_access, char *psz_demux, char *psz_path, vlc_bool_t b_quick ) );
114 VLC_EXPORT( access_t *, access2_FilterNew, ( access_t *p_source, char *psz_access_filter ) );
115 VLC_EXPORT( void, access2_Delete, ( access_t * ) );
117 static inline int access2_vaControl( access_t *p_access, int i_query, va_list args )
119 if( !p_access ) return VLC_EGENERIC;
120 return p_access->pf_control( p_access, i_query, args );
122 static inline int access2_Control( access_t *p_access, int i_query, ... )
127 va_start( args, i_query );
128 i_result = access2_vaControl( p_access, i_query, args );