mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
122 lines
2.6 KiB
C
122 lines
2.6 KiB
C
/*
|
|
* Buffered file io for ffmpeg system
|
|
* Copyright (c) 2001 Gerard Lantau
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <sys/ioctl.h>
|
|
#include <errno.h>
|
|
#include <sys/time.h>
|
|
|
|
#include "avformat.h"
|
|
|
|
/* standard file protocol */
|
|
|
|
static int file_open(URLContext *h, const char *filename, int flags)
|
|
{
|
|
int access;
|
|
int fd;
|
|
|
|
if (flags & URL_WRONLY) {
|
|
access = O_CREAT | O_TRUNC | O_WRONLY;
|
|
} else {
|
|
access = O_RDONLY;
|
|
}
|
|
fd = open(filename, access, 0666);
|
|
if (fd < 0)
|
|
return -ENOENT;
|
|
h->priv_data = (void *)fd;
|
|
return 0;
|
|
}
|
|
|
|
static int file_read(URLContext *h, unsigned char *buf, int size)
|
|
{
|
|
int fd = (int)h->priv_data;
|
|
return read(fd, buf, size);
|
|
}
|
|
|
|
static int file_write(URLContext *h, unsigned char *buf, int size)
|
|
{
|
|
int fd = (int)h->priv_data;
|
|
return write(fd, buf, size);
|
|
}
|
|
|
|
/* XXX: use llseek */
|
|
static offset_t file_seek(URLContext *h, offset_t pos, int whence)
|
|
{
|
|
int fd = (int)h->priv_data;
|
|
return lseek(fd, pos, whence);
|
|
}
|
|
|
|
static int file_close(URLContext *h)
|
|
{
|
|
int fd = (int)h->priv_data;
|
|
return close(fd);
|
|
}
|
|
|
|
URLProtocol file_protocol = {
|
|
"file",
|
|
file_open,
|
|
file_read,
|
|
file_write,
|
|
file_seek,
|
|
file_close,
|
|
};
|
|
|
|
/* pipe protocol */
|
|
|
|
static int pipe_open(URLContext *h, const char *filename, int flags)
|
|
{
|
|
int fd;
|
|
|
|
if (flags & URL_WRONLY) {
|
|
fd = 1;
|
|
} else {
|
|
fd = 0;
|
|
}
|
|
h->priv_data = (void *)fd;
|
|
return 0;
|
|
}
|
|
|
|
static int pipe_read(URLContext *h, unsigned char *buf, int size)
|
|
{
|
|
int fd = (int)h->priv_data;
|
|
return read(fd, buf, size);
|
|
}
|
|
|
|
static int pipe_write(URLContext *h, unsigned char *buf, int size)
|
|
{
|
|
int fd = (int)h->priv_data;
|
|
return write(fd, buf, size);
|
|
}
|
|
|
|
static int pipe_close(URLContext *h)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
URLProtocol pipe_protocol = {
|
|
"pipe",
|
|
pipe_open,
|
|
pipe_read,
|
|
pipe_write,
|
|
NULL,
|
|
pipe_close,
|
|
};
|