1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* Buffered file io for ffmpeg system
* Copyright (c) 2001 Fabrice Bellard
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avstring.h"
#include "avformat.h"
#include <fcntl.h>
#if HAVE_SETMODE
#include <io.h>
#endif
#include <unistd.h>
#include <sys/stat.h>
#include <stdlib.h>
#include "os_support.h"
#include "url.h"
/* standard file protocol */
static int file_read(URLContext *h, unsigned char *buf, int size)
{
int fd = (intptr_t) h->priv_data;
return read(fd, buf, size);
}
static int file_write(URLContext *h, const unsigned char *buf, int size)
{
int fd = (intptr_t) h->priv_data;
return write(fd, buf, size);
}
static int file_get_handle(URLContext *h)
{
return (intptr_t) h->priv_data;
}
#if CONFIG_FILE_PROTOCOL
static int file_open(URLContext *h, const char *filename, int flags)
{
int access;
int fd;
av_strstart(filename, "file:", &filename);
if (flags & AVIO_RDWR) {
access = O_CREAT | O_TRUNC | O_RDWR;
} else if (flags & AVIO_WRONLY) {
access = O_CREAT | O_TRUNC | O_WRONLY;
} else {
access = O_RDONLY;
}
#ifdef O_BINARY
access |= O_BINARY;
#endif
fd = open(filename, access, 0666);
if (fd == -1)
return AVERROR(errno);
h->priv_data = (void *) (intptr_t) fd;
return 0;
}
/* XXX: use llseek */
static int64_t file_seek(URLContext *h, int64_t pos, int whence)
{
int fd = (intptr_t) h->priv_data;
if (whence == AVSEEK_SIZE) {
struct stat st;
int ret = fstat(fd, &st);
return ret < 0 ? AVERROR(errno) : st.st_size;
}
return lseek(fd, pos, whence);
}
static int file_close(URLContext *h)
{
int fd = (intptr_t) h->priv_data;
return close(fd);
}
URLProtocol ff_file_protocol = {
.name = "file",
.url_open = file_open,
.url_read = file_read,
.url_write = file_write,
.url_seek = file_seek,
.url_close = file_close,
.url_get_file_handle = file_get_handle,
};
#endif /* CONFIG_FILE_PROTOCOL */
#if CONFIG_PIPE_PROTOCOL
static int pipe_open(URLContext *h, const char *filename, int flags)
{
int fd;
char *final;
av_strstart(filename, "pipe:", &filename);
fd = strtol(filename, &final, 10);
if((filename == final) || *final ) {/* No digits found, or something like 10ab */
if (flags & AVIO_WRONLY) {
fd = 1;
} else {
fd = 0;
}
}
#if HAVE_SETMODE
setmode(fd, O_BINARY);
#endif
h->priv_data = (void *) (intptr_t) fd;
h->is_streamed = 1;
return 0;
}
URLProtocol ff_pipe_protocol = {
.name = "pipe",
.url_open = pipe_open,
.url_read = file_read,
.url_write = file_write,
.url_get_file_handle = file_get_handle,
};
#endif /* CONFIG_PIPE_PROTOCOL */
|
