1 /*****************************************************************************
2 * avio.c: access using libavformat library
3 *****************************************************************************
4 * Copyright (C) 2009 Laurent Aimar
7 * Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
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 *****************************************************************************/
29 #include <vlc_common.h>
30 #include <vlc_plugin.h>
31 #include <vlc_access.h>
32 #include <vlc_avcodec.h>
36 /*****************************************************************************
38 *****************************************************************************/
45 /*****************************************************************************
47 *****************************************************************************/
48 static ssize_t
Read (access_t
*, uint8_t *, size_t);
49 static int Seek (access_t
*, int64_t);
50 static int Control(access_t
*, int, va_list);
52 static int SetupAvio(access_t
*);
59 int OpenAvio(vlc_object_t
*object
)
61 access_t
*access
= (access_t
*)object
;
65 access
->p_sys
= sys
= malloc(sizeof(*sys
));
69 /* We can either accept only one user (actually) or multiple ones
70 * with an exclusive lock */
71 if (SetupAvio(access
)) {
72 msg_Err(access
, "Module aready in use");
83 * - url (only a subset of available protocols).
86 if (!strcmp(access
->psz_access
, "avio"))
87 url
= strdup(access
->psz_path
);
88 else if (asprintf(&url
, "%s://%s", access
->psz_access
, access
->psz_path
) < 0)
94 msg_Dbg(access
, "Opening '%s'", url
);
95 if (url_open(&sys
->context
, url
, URL_RDONLY
) < 0 )
100 msg_Err(access
, "Failed to open url using libavformat");
103 const int64_t size
= url_filesize(sys
->context
);
104 msg_Dbg(access
, "is_streamed=%d size=%"PRIi64
, sys
->context
->is_streamed
, size
);
107 access_InitFields(access
);
108 access
->info
.i_size
= size
> 0 ? size
: 0;
110 access
->pf_read
= Read
;
111 access
->pf_block
= NULL
;
112 access
->pf_control
= Control
;
113 access
->pf_seek
= Seek
;
125 void CloseAvio(vlc_object_t
*object
)
127 access_t
*access
= (access_t
*)object
;
128 access_sys_t
*sys
= access
->p_sys
;
130 url_close(sys
->context
);
138 static ssize_t
Read(access_t
*access
, uint8_t *data
, size_t size
)
140 /* FIXME I am unsure of the meaning of the return value in case
143 int r
= url_read(access
->p_sys
->context
, data
, size
);
144 access
->info
.b_eof
= r
<= 0;
147 access
->info
.i_pos
+= r
;
152 static int Seek(access_t
*access
, int64_t position
)
154 access_sys_t
*sys
= access
->p_sys
;
156 if (url_seek(sys
->context
, position
, SEEK_SET
) < 0) {
157 msg_Err(access
, "Seek to %"PRIi64
" failed\n", position
);
158 if (access
->info
.i_size
<= 0 || position
!= access
->info
.i_size
)
161 access
->info
.i_pos
= position
;
162 access
->info
.b_eof
= false;
167 static int Control(access_t
*access
, int query
, va_list args
)
169 access_sys_t
*sys
= access
->p_sys
;
172 case ACCESS_CAN_SEEK
:
173 case ACCESS_CAN_FASTSEEK
: { /* FIXME how to do that ? */
174 bool *b
= va_arg(args
, bool *);
175 *b
= !sys
->context
->is_streamed
;
178 case ACCESS_CAN_PAUSE
: {
179 bool *b
= va_arg(args
, bool *);
180 *b
= sys
->context
->prot
->url_read_pause
!= NULL
; /* FIXME Unsure */
183 case ACCESS_CAN_CONTROL_PACE
: {
184 bool *b
= va_arg(args
, bool *);
185 *b
= true; /* FIXME */
188 case ACCESS_GET_PTS_DELAY
: {
189 int64_t *delay
= va_arg(args
, int64_t *);
190 *delay
= DEFAULT_PTS_DELAY
; /* FIXME */
192 case ACCESS_SET_PAUSE_STATE
: {
193 bool is_paused
= va_arg(args
, int);
194 if (av_url_read_pause(sys
->context
, is_paused
)< 0)
198 case ACCESS_GET_TITLE_INFO
:
199 case ACCESS_GET_META
:
200 case ACCESS_GET_CONTENT_TYPE
:
201 case ACCESS_GET_SIGNAL
:
202 case ACCESS_SET_TITLE
:
203 case ACCESS_SET_SEEKPOINT
:
204 case ACCESS_SET_PRIVATE_ID_STATE
:
205 case ACCESS_SET_PRIVATE_ID_CA
:
206 case ACCESS_GET_PRIVATE_ID_STATE
:
213 static vlc_mutex_t avio_lock
= VLC_STATIC_MUTEX
;
214 static access_t
*current_access
= NULL
;
217 static int UrlInterruptCallback(void)
219 assert(current_access
);
220 return !vlc_object_alive(current_access
);
224 static int SetupAvio(access_t
*access
)
226 vlc_mutex_lock(&avio_lock
);
227 assert(!access
!= !current_access
);
228 if (access
&& current_access
) {
229 vlc_mutex_unlock(&avio_lock
);
232 url_set_interrupt_cb(access
? UrlInterruptCallback
: NULL
);
233 current_access
= access
;
234 vlc_mutex_unlock(&avio_lock
);