Add #ifdefs around code specific to file and pipe protocols
[libav.git] / libavformat / file.c
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1/*
2 * Buffered file io for ffmpeg system
19720f15 3 * Copyright (c) 2001 Fabrice Bellard
de6d9b64 4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
de6d9b64 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
de6d9b64 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
de6d9b64 16 *
19720f15 17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
de6d9b64 20 */
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21
22#include "libavutil/avstring.h"
8be1c656 23#include "avformat.h"
de6d9b64 24#include <fcntl.h>
b250f9c6 25#if HAVE_SETMODE
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26#include <io.h>
27#endif
8be1c656 28#include <unistd.h>
5b33a553 29#include <sys/stat.h>
9e33b10f 30#include <stdlib.h>
a5e979f4 31#include "os_support.h"
de6d9b64 32
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33
34/* standard file protocol */
35
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36static int file_read(URLContext *h, unsigned char *buf, int size)
37{
38 int fd = (intptr_t) h->priv_data;
39 return read(fd, buf, size);
40}
41
42static int file_write(URLContext *h, const unsigned char *buf, int size)
43{
44 int fd = (intptr_t) h->priv_data;
45 return write(fd, buf, size);
46}
47
48static int file_get_handle(URLContext *h)
49{
50 return (intptr_t) h->priv_data;
51}
52
53#if CONFIG_FILE_PROTOCOL
54
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55static int file_open(URLContext *h, const char *filename, int flags)
56{
57 int access;
58 int fd;
59
f7d78f36 60 av_strstart(filename, "file:", &filename);
a1dfc201 61
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62 if (flags & URL_RDWR) {
63 access = O_CREAT | O_TRUNC | O_RDWR;
64 } else if (flags & URL_WRONLY) {
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65 access = O_CREAT | O_TRUNC | O_WRONLY;
66 } else {
67 access = O_RDONLY;
68 }
05d00e95 69#ifdef O_BINARY
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70 access |= O_BINARY;
71#endif
de6d9b64 72 fd = open(filename, access, 0666);
fbf7e805 73 if (fd == -1)
ec679173 74 return AVERROR(errno);
d4efacff 75 h->priv_data = (void *) (intptr_t) fd;
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76 return 0;
77}
78
de6d9b64 79/* XXX: use llseek */
bc5c918e 80static int64_t file_seek(URLContext *h, int64_t pos, int whence)
de6d9b64 81{
d4efacff 82 int fd = (intptr_t) h->priv_data;
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83 if (whence == AVSEEK_SIZE) {
84 struct stat st;
85 int ret = fstat(fd, &st);
86 return ret < 0 ? AVERROR(errno) : st.st_size;
87 }
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88 return lseek(fd, pos, whence);
89}
90
91static int file_close(URLContext *h)
92{
d4efacff 93 int fd = (intptr_t) h->priv_data;
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94 return close(fd);
95}
96
97URLProtocol file_protocol = {
98 "file",
99 file_open,
100 file_read,
101 file_write,
102 file_seek,
103 file_close,
f0a80394 104 .url_get_file_handle = file_get_handle,
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105};
106
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107#endif /* CONFIG_FILE_PROTOCOL */
108
109#if CONFIG_PIPE_PROTOCOL
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110
111static int pipe_open(URLContext *h, const char *filename, int flags)
112{
113 int fd;
fbcb0811 114 char *final;
9e33b10f 115 av_strstart(filename, "pipe:", &filename);
de6d9b64 116
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117 fd = strtol(filename, &final, 10);
118 if((filename == final) || *final ) {/* No digits found, or something like 10ab */
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119 if (flags & URL_WRONLY) {
120 fd = 1;
121 } else {
122 fd = 0;
123 }
9e33b10f 124 }
b250f9c6 125#if HAVE_SETMODE
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126 setmode(fd, O_BINARY);
127#endif
d4efacff 128 h->priv_data = (void *) (intptr_t) fd;
f9a35124 129 h->is_streamed = 1;
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130 return 0;
131}
132
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133URLProtocol pipe_protocol = {
134 "pipe",
135 pipe_open,
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136 file_read,
137 file_write,
f0a80394 138 .url_get_file_handle = file_get_handle,
de6d9b64 139};
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140
141#endif /* CONFIG_PIPE_PROTOCOL */