2 * Buffered file io for ffmpeg system
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"
31 #include "os_support.h"
34 /* standard file protocol */
36 static int file_read(URLContext *h, unsigned char *buf, int size)
38 int fd = (intptr_t) h->priv_data;
39 return read(fd, buf, size);
42 static int file_write(URLContext *h, const unsigned char *buf, int size)
44 int fd = (intptr_t) h->priv_data;
45 return write(fd, buf, size);
48 static int file_get_handle(URLContext *h)
50 return (intptr_t) h->priv_data;
53 #if CONFIG_FILE_PROTOCOL
55 static int file_open(URLContext *h, const char *filename, int flags)
60 av_strstart(filename, "file:", &filename);
62 if (flags & AVIO_RDWR) {
63 access = O_CREAT | O_TRUNC | O_RDWR;
64 } else if (flags & AVIO_WRONLY) {
65 access = O_CREAT | O_TRUNC | O_WRONLY;
72 fd = open(filename, access, 0666);
74 return AVERROR(errno);
75 h->priv_data = (void *) (intptr_t) fd;
80 static int64_t file_seek(URLContext *h, int64_t pos, int whence)
82 int fd = (intptr_t) h->priv_data;
83 if (whence == AVSEEK_SIZE) {
85 int ret = fstat(fd, &st);
86 return ret < 0 ? AVERROR(errno) : st.st_size;
88 return lseek(fd, pos, whence);
91 static int file_close(URLContext *h)
93 int fd = (intptr_t) h->priv_data;
97 URLProtocol ff_file_protocol = {
104 .url_get_file_handle = file_get_handle,
107 #endif /* CONFIG_FILE_PROTOCOL */
109 #if CONFIG_PIPE_PROTOCOL
111 static int pipe_open(URLContext *h, const char *filename, int flags)
115 av_strstart(filename, "pipe:", &filename);
117 fd = strtol(filename, &final, 10);
118 if((filename == final) || *final ) {/* No digits found, or something like 10ab */
119 if (flags & AVIO_WRONLY) {
126 setmode(fd, O_BINARY);
128 h->priv_data = (void *) (intptr_t) fd;
133 URLProtocol ff_pipe_protocol = {
138 .url_get_file_handle = file_get_handle,
141 #endif /* CONFIG_PIPE_PROTOCOL */