2 * Buffered file io for ffmpeg system
3 * Copyright (c) 2001 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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"
32 #include "os_support.h"
35 /* standard file protocol */
37 static int file_open(URLContext *h, const char *filename, int flags)
42 av_strstart(filename, "file:", &filename);
44 if (flags & URL_RDWR) {
45 access = O_CREAT | O_TRUNC | O_RDWR;
46 } else if (flags & URL_WRONLY) {
47 access = O_CREAT | O_TRUNC | O_WRONLY;
54 fd = open(filename, access, 0666);
56 return AVERROR(errno);
57 h->priv_data = (void *) (intptr_t) fd;
61 static int file_read(URLContext *h, unsigned char *buf, int size)
63 int fd = (intptr_t) h->priv_data;
64 return read(fd, buf, size);
67 static int file_write(URLContext *h, unsigned char *buf, int size)
69 int fd = (intptr_t) h->priv_data;
70 return write(fd, buf, size);
74 static int64_t file_seek(URLContext *h, int64_t pos, int whence)
76 int fd = (intptr_t) h->priv_data;
77 if (whence == AVSEEK_SIZE) {
79 int ret = fstat(fd, &st);
80 return ret < 0 ? AVERROR(errno) : st.st_size;
82 return lseek(fd, pos, whence);
85 static int file_close(URLContext *h)
87 int fd = (intptr_t) h->priv_data;
91 static int file_get_handle(URLContext *h)
93 return (intptr_t) h->priv_data;
96 URLProtocol file_protocol = {
103 .url_get_file_handle = file_get_handle,
108 static int pipe_open(URLContext *h, const char *filename, int flags)
112 av_strstart(filename, "pipe:", &filename);
114 fd = strtol(filename, &final, 10);
115 if((filename == final) || *final ) {/* No digits found, or something like 10ab */
116 if (flags & URL_WRONLY) {
123 setmode(fd, O_BINARY);
125 h->priv_data = (void *) (intptr_t) fd;
130 URLProtocol pipe_protocol = {
135 .url_get_file_handle = file_get_handle,