ffmpeg / libavformat / file.c @ 5509bffa
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/*
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* Buffered file io for ffmpeg system
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* Copyright (c) 2001 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h" |
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#include <fcntl.h> |
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#ifndef CONFIG_WIN32
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#include <unistd.h> |
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#include <sys/ioctl.h> |
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#include <sys/time.h> |
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#else
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#include <io.h> |
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#define open(fname,oflag,pmode) _open(fname,oflag,pmode)
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#endif /* CONFIG_WIN32 */ |
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/* standard file protocol */
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static int file_open(URLContext *h, const char *filename, int flags) |
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{ |
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int access;
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int fd;
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strstart(filename, "file:", &filename);
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if (flags & URL_RDWR) {
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access = O_CREAT | O_TRUNC | O_RDWR; |
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} else if (flags & URL_WRONLY) { |
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access = O_CREAT | O_TRUNC | O_WRONLY; |
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} else {
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access = O_RDONLY; |
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} |
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#if defined(CONFIG_WIN32) || defined(CONFIG_OS2) || defined(__CYGWIN__)
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access |= O_BINARY; |
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#endif
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fd = open(filename, access, 0666);
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if (fd < 0) |
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return -ENOENT;
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h->priv_data = (void *)(size_t)fd;
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return 0; |
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} |
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static int file_read(URLContext *h, unsigned char *buf, int size) |
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{ |
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int fd = (size_t)h->priv_data;
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return read(fd, buf, size);
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} |
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static int file_write(URLContext *h, unsigned char *buf, int size) |
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{ |
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int fd = (size_t)h->priv_data;
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return write(fd, buf, size);
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} |
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/* XXX: use llseek */
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static offset_t file_seek(URLContext *h, offset_t pos, int whence) |
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{ |
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int fd = (size_t)h->priv_data;
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#if defined(CONFIG_WIN32) && !defined(__CYGWIN__)
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return _lseeki64(fd, pos, whence);
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#else
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return lseek(fd, pos, whence);
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#endif
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} |
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static int file_close(URLContext *h) |
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{ |
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int fd = (size_t)h->priv_data;
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return close(fd);
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} |
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URLProtocol file_protocol = { |
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"file",
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file_open, |
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file_read, |
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file_write, |
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file_seek, |
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file_close, |
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}; |
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/* pipe protocol */
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static int pipe_open(URLContext *h, const char *filename, int flags) |
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{ |
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int fd;
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if (flags & URL_WRONLY) {
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fd = 1;
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} else {
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fd = 0;
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} |
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#if defined(CONFIG_WIN32) || defined(CONFIG_OS2) || defined(__CYGWIN__)
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setmode(fd, O_BINARY); |
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#endif
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h->priv_data = (void *)(size_t)fd;
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h->is_streamed = 1;
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return 0; |
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} |
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static int pipe_read(URLContext *h, unsigned char *buf, int size) |
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{ |
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int fd = (size_t)h->priv_data;
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return read(fd, buf, size);
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} |
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static int pipe_write(URLContext *h, unsigned char *buf, int size) |
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{ |
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int fd = (size_t)h->priv_data;
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return write(fd, buf, size);
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} |
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static int pipe_close(URLContext *h) |
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{ |
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return 0; |
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} |
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URLProtocol pipe_protocol = { |
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"pipe",
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pipe_open, |
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pipe_read, |
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pipe_write, |
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NULL,
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pipe_close, |
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}; |