3 * Copyright (c) 2001 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avstring.h"
23 #include "libavutil/opt.h"
34 #include "os_support.h"
38 /* standard file protocol */
40 typedef struct FileContext {
46 static const AVOption file_options[] = {
47 { "truncate", "Truncate existing files on write", offsetof(FileContext, trunc), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
51 static const AVClass file_class = {
53 .item_name = av_default_item_name,
54 .option = file_options,
55 .version = LIBAVUTIL_VERSION_INT,
58 static int file_read(URLContext *h, unsigned char *buf, int size)
60 FileContext *c = h->priv_data;
61 return read(c->fd, buf, size);
64 static int file_write(URLContext *h, const unsigned char *buf, int size)
66 FileContext *c = h->priv_data;
67 return write(c->fd, buf, size);
70 static int file_get_handle(URLContext *h)
72 FileContext *c = h->priv_data;
76 static int file_check(URLContext *h, int mask)
79 int ret = stat(h->filename, &st);
81 return AVERROR(errno);
83 ret |= st.st_mode&S_IRUSR ? mask&AVIO_FLAG_READ : 0;
84 ret |= st.st_mode&S_IWUSR ? mask&AVIO_FLAG_WRITE : 0;
89 #if CONFIG_FILE_PROTOCOL
91 static int file_open(URLContext *h, const char *filename, int flags)
93 FileContext *c = h->priv_data;
97 av_strstart(filename, "file:", &filename);
99 if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
100 access = O_CREAT | O_RDWR;
103 } else if (flags & AVIO_FLAG_WRITE) {
104 access = O_CREAT | O_WRONLY;
113 fd = open(filename, access, 0666);
115 return AVERROR(errno);
120 /* XXX: use llseek */
121 static int64_t file_seek(URLContext *h, int64_t pos, int whence)
123 FileContext *c = h->priv_data;
126 if (whence == AVSEEK_SIZE) {
129 ret = fstat(c->fd, &st);
130 return ret < 0 ? AVERROR(errno) : st.st_size;
133 ret = lseek(c->fd, pos, whence);
135 return ret < 0 ? AVERROR(errno) : ret;
138 static int file_close(URLContext *h)
140 FileContext *c = h->priv_data;
144 URLProtocol ff_file_protocol = {
146 .url_open = file_open,
147 .url_read = file_read,
148 .url_write = file_write,
149 .url_seek = file_seek,
150 .url_close = file_close,
151 .url_get_file_handle = file_get_handle,
152 .url_check = file_check,
153 .priv_data_size = sizeof(FileContext),
154 .priv_data_class = &file_class,
157 #endif /* CONFIG_FILE_PROTOCOL */
159 #if CONFIG_PIPE_PROTOCOL
161 static int pipe_open(URLContext *h, const char *filename, int flags)
163 FileContext *c = h->priv_data;
166 av_strstart(filename, "pipe:", &filename);
168 fd = strtol(filename, &final, 10);
169 if((filename == final) || *final ) {/* No digits found, or something like 10ab */
170 if (flags & AVIO_FLAG_WRITE) {
177 setmode(fd, O_BINARY);
184 URLProtocol ff_pipe_protocol = {
186 .url_open = pipe_open,
187 .url_read = file_read,
188 .url_write = file_write,
189 .url_get_file_handle = file_get_handle,
190 .url_check = file_check,
191 .priv_data_size = sizeof(FileContext),
194 #endif /* CONFIG_PIPE_PROTOCOL */