forked from KolibriOS/kolibrios
285 lines
6.8 KiB
C
285 lines
6.8 KiB
C
/*
|
|
* buffered file I/O
|
|
* Copyright (c) 2001 Fabrice Bellard
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/avstring.h"
|
|
#include "libavutil/internal.h"
|
|
#include "libavutil/opt.h"
|
|
#include "avformat.h"
|
|
#if HAVE_DIRENT_H
|
|
#include <dirent.h>
|
|
#endif
|
|
#include <fcntl.h>
|
|
#if HAVE_IO_H
|
|
#include <io.h>
|
|
#endif
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#include <sys/stat.h>
|
|
#include <stdlib.h>
|
|
#include "os_support.h"
|
|
#include "url.h"
|
|
|
|
/* Some systems may not have S_ISFIFO */
|
|
#ifndef S_ISFIFO
|
|
# ifdef S_IFIFO
|
|
# define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
|
|
# else
|
|
# define S_ISFIFO(m) 0
|
|
# endif
|
|
#endif
|
|
|
|
/* Not available in POSIX.1-1996 */
|
|
#ifndef S_ISLNK
|
|
# ifdef S_IFLNK
|
|
# define S_ISLNK(m) (((m) & S_IFLNK) == S_IFLNK)
|
|
# else
|
|
# define S_ISLNK(m) 0
|
|
# endif
|
|
#endif
|
|
|
|
/* Not available in POSIX.1-1996 */
|
|
#ifndef S_ISSOCK
|
|
# ifdef S_IFSOCK
|
|
# define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
|
|
# else
|
|
# define S_ISSOCK(m) 0
|
|
# endif
|
|
#endif
|
|
|
|
/* standard file protocol */
|
|
|
|
typedef struct FileContext {
|
|
const AVClass *class;
|
|
int fd;
|
|
int trunc;
|
|
int blocksize;
|
|
#if HAVE_DIRENT_H
|
|
DIR *dir;
|
|
#endif
|
|
} FileContext;
|
|
|
|
static const AVOption file_options[] = {
|
|
{ "truncate", "truncate existing files on write", offsetof(FileContext, trunc), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
|
|
{ "blocksize", "set I/O operation maximum block size", offsetof(FileContext, blocksize), AV_OPT_TYPE_INT, { .i64 = INT_MAX }, 1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVOption pipe_options[] = {
|
|
{ "blocksize", "set I/O operation maximum block size", offsetof(FileContext, blocksize), AV_OPT_TYPE_INT, { .i64 = INT_MAX }, 1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVClass file_class = {
|
|
.class_name = "file",
|
|
.item_name = av_default_item_name,
|
|
.option = file_options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
static const AVClass pipe_class = {
|
|
.class_name = "pipe",
|
|
.item_name = av_default_item_name,
|
|
.option = pipe_options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
static int file_read(URLContext *h, unsigned char *buf, int size)
|
|
{
|
|
FileContext *c = h->priv_data;
|
|
int r;
|
|
size = FFMIN(size, c->blocksize);
|
|
r = read(c->fd, buf, size);
|
|
return (-1 == r)?AVERROR(errno):r;
|
|
}
|
|
|
|
static int file_write(URLContext *h, const unsigned char *buf, int size)
|
|
{
|
|
FileContext *c = h->priv_data;
|
|
int r;
|
|
size = FFMIN(size, c->blocksize);
|
|
r = write(c->fd, buf, size);
|
|
return (-1 == r)?AVERROR(errno):r;
|
|
}
|
|
|
|
static int file_get_handle(URLContext *h)
|
|
{
|
|
FileContext *c = h->priv_data;
|
|
return c->fd;
|
|
}
|
|
|
|
static int file_check(URLContext *h, int mask)
|
|
{
|
|
return AVIO_FLAG_READ | AVIO_FLAG_WRITE ;
|
|
}
|
|
|
|
static int file_delete(URLContext *h)
|
|
{
|
|
return AVERROR(ENOSYS);
|
|
}
|
|
|
|
static int file_move(URLContext *h_src, URLContext *h_dst)
|
|
{
|
|
return AVERROR(ENOSYS);
|
|
}
|
|
|
|
#if CONFIG_FILE_PROTOCOL
|
|
|
|
static int file_open(URLContext *h, const char *filename, int flags)
|
|
{
|
|
FileContext *c = h->priv_data;
|
|
int access;
|
|
int fd;
|
|
struct stat st;
|
|
|
|
av_strstart(filename, "file:", &filename);
|
|
|
|
if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
|
|
access = O_CREAT | O_RDWR;
|
|
if (c->trunc)
|
|
access |= O_TRUNC;
|
|
} else if (flags & AVIO_FLAG_WRITE) {
|
|
access = O_CREAT | O_WRONLY;
|
|
if (c->trunc)
|
|
access |= O_TRUNC;
|
|
} else {
|
|
access = O_RDONLY;
|
|
}
|
|
#ifdef O_BINARY
|
|
access |= O_BINARY;
|
|
#endif
|
|
fd = avpriv_open(filename, access, 0666);
|
|
if (fd == -1)
|
|
return AVERROR(errno);
|
|
c->fd = fd;
|
|
|
|
h->is_streamed = !fstat(fd, &st) && S_ISFIFO(st.st_mode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* XXX: use llseek */
|
|
static int64_t file_seek(URLContext *h, int64_t pos, int whence)
|
|
{
|
|
FileContext *c = h->priv_data;
|
|
int64_t ret;
|
|
|
|
if (whence == AVSEEK_SIZE) {
|
|
struct stat st;
|
|
ret = fstat(c->fd, &st);
|
|
return ret < 0 ? AVERROR(errno) : (S_ISFIFO(st.st_mode) ? 0 : st.st_size);
|
|
}
|
|
|
|
ret = lseek(c->fd, pos, whence);
|
|
|
|
return ret < 0 ? AVERROR(errno) : ret;
|
|
}
|
|
|
|
static int file_close(URLContext *h)
|
|
{
|
|
FileContext *c = h->priv_data;
|
|
return close(c->fd);
|
|
}
|
|
|
|
static int file_open_dir(URLContext *h)
|
|
{
|
|
#if HAVE_LSTAT
|
|
FileContext *c = h->priv_data;
|
|
|
|
c->dir = opendir(h->filename);
|
|
if (!c->dir)
|
|
return AVERROR(errno);
|
|
|
|
return 0;
|
|
#else
|
|
return AVERROR(ENOSYS);
|
|
#endif /* HAVE_LSTAT */
|
|
}
|
|
|
|
static int file_read_dir(URLContext *h, AVIODirEntry **next)
|
|
{
|
|
return AVERROR(ENOSYS);
|
|
}
|
|
|
|
static int file_close_dir(URLContext *h)
|
|
{
|
|
return AVERROR(ENOSYS);
|
|
|
|
}
|
|
|
|
URLProtocol ff_file_protocol = {
|
|
.name = "file",
|
|
.url_open = file_open,
|
|
.url_read = file_read,
|
|
.url_write = file_write,
|
|
.url_seek = file_seek,
|
|
.url_close = file_close,
|
|
.url_get_file_handle = file_get_handle,
|
|
.url_check = file_check,
|
|
.url_delete = file_delete,
|
|
.url_move = file_move,
|
|
.priv_data_size = sizeof(FileContext),
|
|
.priv_data_class = &file_class,
|
|
.url_open_dir = file_open_dir,
|
|
.url_read_dir = file_read_dir,
|
|
.url_close_dir = file_close_dir,
|
|
};
|
|
|
|
#endif /* CONFIG_FILE_PROTOCOL */
|
|
|
|
#if CONFIG_PIPE_PROTOCOL
|
|
|
|
static int pipe_open(URLContext *h, const char *filename, int flags)
|
|
{
|
|
FileContext *c = h->priv_data;
|
|
int fd;
|
|
char *final;
|
|
av_strstart(filename, "pipe:", &filename);
|
|
|
|
fd = strtol(filename, &final, 10);
|
|
if((filename == final) || *final ) {/* No digits found, or something like 10ab */
|
|
if (flags & AVIO_FLAG_WRITE) {
|
|
fd = 1;
|
|
} else {
|
|
fd = 0;
|
|
}
|
|
}
|
|
#if HAVE_SETMODE
|
|
setmode(fd, O_BINARY);
|
|
#endif
|
|
c->fd = fd;
|
|
h->is_streamed = 1;
|
|
return 0;
|
|
}
|
|
|
|
URLProtocol ff_pipe_protocol = {
|
|
.name = "pipe",
|
|
.url_open = pipe_open,
|
|
.url_read = file_read,
|
|
.url_write = file_write,
|
|
.url_get_file_handle = file_get_handle,
|
|
.url_check = file_check,
|
|
.priv_data_size = sizeof(FileContext),
|
|
.priv_data_class = &pipe_class,
|
|
};
|
|
|
|
#endif /* CONFIG_PIPE_PROTOCOL */
|