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
23 #include "libavutil/avstring.h"
32 #include "os_support.h"
35 /* standard file protocol */
41 static int file_open(URLContext *h, const char *filename, int flags)
43 struct FileContext *s = h->priv_data;
47 av_strstart(filename, "file:", &filename);
49 if (flags & URL_RDWR) {
50 access = O_CREAT | O_TRUNC | O_RDWR;
51 } else if (flags & URL_WRONLY) {
52 access = O_CREAT | O_TRUNC | O_WRONLY;
59 s = av_malloc(sizeof(struct FileContext));
61 return AVERROR(ENOMEM);
62 if (flags & URL_DIRECT)
64 fd = open(filename, access, 0666);
66 return AVERROR(ENOENT);
68 h->priv_data = (void *) s;
72 static int file_read(URLContext *h, unsigned char *buf, int size)
74 struct FileContext *s = h->priv_data;
76 return read(fd, buf, size);
79 static int file_write(URLContext *h, unsigned char *buf, int size)
81 struct FileContext *s = h->priv_data;
83 return write(fd, buf, size);
87 static int64_t file_seek(URLContext *h, int64_t pos, int whence)
89 struct FileContext *s = h->priv_data;
91 return lseek(fd, pos, whence);
94 static int file_close(URLContext *h)
96 struct FileContext *s = h->priv_data;
101 static int file_get_handle(URLContext *h)
103 return (intptr_t) h->priv_data;
106 URLProtocol file_protocol = {
113 .url_get_file_handle = file_get_handle,
118 static int pipe_open(URLContext *h, const char *filename, int flags)
122 av_strstart(filename, "pipe:", &filename);
124 fd = strtol(filename, &final, 10);
125 if((filename == final) || *final ) {/* No digits found, or something like 10ab */
126 if (flags & URL_WRONLY) {
133 setmode(fd, O_BINARY);
135 h->priv_data = (void *) (intptr_t) fd;
140 URLProtocol pipe_protocol = {
145 .url_get_file_handle = file_get_handle,