moved matrix init away from MPV_common_init()
[libav.git] / libav / file.c
1 /*
2 * Buffered file io for ffmpeg system
3 * Copyright (c) 2001 Gerard Lantau
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19 #include <stdlib.h>
20 #include <stdio.h>
21 #include <unistd.h>
22 #include <fcntl.h>
23 #include <sys/ioctl.h>
24 #include <errno.h>
25 #include <sys/time.h>
26
27 #include "avformat.h"
28
29 /* standard file protocol */
30
31 static int file_open(URLContext *h, const char *filename, int flags)
32 {
33 int access;
34 int fd;
35
36 if (flags & URL_WRONLY) {
37 access = O_CREAT | O_TRUNC | O_WRONLY;
38 } else {
39 access = O_RDONLY;
40 }
41 fd = open(filename, access, 0666);
42 if (fd < 0)
43 return -ENOENT;
44 h->priv_data = (void *)fd;
45 return 0;
46 }
47
48 static int file_read(URLContext *h, unsigned char *buf, int size)
49 {
50 int fd = (int)h->priv_data;
51 return read(fd, buf, size);
52 }
53
54 static int file_write(URLContext *h, unsigned char *buf, int size)
55 {
56 int fd = (int)h->priv_data;
57 return write(fd, buf, size);
58 }
59
60 /* XXX: use llseek */
61 static offset_t file_seek(URLContext *h, offset_t pos, int whence)
62 {
63 int fd = (int)h->priv_data;
64 return lseek(fd, pos, whence);
65 }
66
67 static int file_close(URLContext *h)
68 {
69 int fd = (int)h->priv_data;
70 return close(fd);
71 }
72
73 URLProtocol file_protocol = {
74 "file",
75 file_open,
76 file_read,
77 file_write,
78 file_seek,
79 file_close,
80 };
81
82 /* pipe protocol */
83
84 static int pipe_open(URLContext *h, const char *filename, int flags)
85 {
86 int fd;
87
88 if (flags & URL_WRONLY) {
89 fd = 1;
90 } else {
91 fd = 0;
92 }
93 h->priv_data = (void *)fd;
94 return 0;
95 }
96
97 static int pipe_read(URLContext *h, unsigned char *buf, int size)
98 {
99 int fd = (int)h->priv_data;
100 return read(fd, buf, size);
101 }
102
103 static int pipe_write(URLContext *h, unsigned char *buf, int size)
104 {
105 int fd = (int)h->priv_data;
106 return write(fd, buf, size);
107 }
108
109 static int pipe_close(URLContext *h)
110 {
111 return 0;
112 }
113
114 URLProtocol pipe_protocol = {
115 "pipe",
116 pipe_open,
117 pipe_read,
118 pipe_write,
119 NULL,
120 pipe_close,
121 };