PeerStreamer

/*

 * Buffered file io for ffmpeg system

 * Copyright (c) 2001 Fabrice Bellard

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include "avformat.h"

#include <fcntl.h>

#ifndef CONFIG_WIN32

#include <unistd.h>

#include <sys/ioctl.h>

#include <sys/time.h>

#else

#include <io.h>

#define open(fname,oflag,pmode) _open(fname,oflag,pmode)

#endif /* CONFIG_WIN32 */

/* standard file protocol */

static int file_open(URLContext *h, const char *filename, int flags)

{

    int access;

    int fd;

    strstart(filename, "file:", &filename);

    if (flags & URL_RDWR) {

        access = O_CREAT | O_TRUNC | O_RDWR;

    } else if (flags & URL_WRONLY) {

        access = O_CREAT | O_TRUNC | O_WRONLY;

    } else {

        access = O_RDONLY;

    }

#if defined(CONFIG_WIN32) || defined(CONFIG_OS2) || defined(__CYGWIN__)

    access |= O_BINARY;

#endif

    fd = open(filename, access, 0666);

    if (fd < 0)

        return -ENOENT;

    h->priv_data = (void *)(size_t)fd;

    return 0;

}

static int file_read(URLContext *h, unsigned char *buf, int size)

{

    int fd = (size_t)h->priv_data;

    return read(fd, buf, size);

}

static int file_write(URLContext *h, unsigned char *buf, int size)

{

    int fd = (size_t)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 = (size_t)h->priv_data;

#if defined(CONFIG_WIN32) && !defined(__CYGWIN__)

    return _lseeki64(fd, pos, whence);

#else

    return lseek(fd, pos, whence);

#endif

}

static int file_close(URLContext *h)

{

    int fd = (size_t)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;

    }

#if defined(CONFIG_WIN32) || defined(CONFIG_OS2) || defined(__CYGWIN__)

    setmode(fd, O_BINARY);

#endif

    h->priv_data = (void *)(size_t)fd;

    h->is_streamed = 1;

    return 0;

}

static int pipe_read(URLContext *h, unsigned char *buf, int size)

{

    int fd = (size_t)h->priv_data;

    return read(fd, buf, size);

}

static int pipe_write(URLContext *h, unsigned char *buf, int size)

{

    int fd = (size_t)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,

};