Sweden-Number/dlls/avicap32/v4l.c

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/*
* Copyright 2002 Dmitry Timoshkov for CodeWeavers
* Copyright 2005 Maarten Lankhorst
*
* 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 2.1 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 St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#if 0
#pragma makedep unix
#endif
#include "config.h"
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <unistd.h>
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#ifdef HAVE_LINUX_VIDEODEV2_H
# include <linux/videodev2.h>
#endif
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.h"
#include "wine/debug.h"
#include "unixlib.h"
#ifdef HAVE_LINUX_VIDEODEV2_H
WINE_DEFAULT_DEBUG_CHANNEL(avicap);
static int xioctl(int fd, int request, void *arg)
{
int ret;
do
ret = ioctl(fd, request, arg);
while (ret < 0 && errno == EINTR);
return ret;
}
static void v4l_umbstowcs(const char *src, DWORD srclen, WCHAR *dst, DWORD dstlen)
{
DWORD ret = ntdll_umbstowcs(src, srclen, dst, dstlen - 1);
dst[ret] = 0;
}
static NTSTATUS get_device_desc(void *args)
{
struct get_device_desc_params *params = args;
struct v4l2_capability caps = {{0}};
char device[16];
struct stat st;
int fd;
snprintf(device, sizeof(device), "/dev/video%u", params->index);
if (stat(device, &st) < 0)
{
/* This is probably because the device does not exist */
WARN("Failed to stat %s: %s\n", device, strerror(errno));
return STATUS_OBJECT_NAME_NOT_FOUND;
}
if (!S_ISCHR(st.st_mode))
{
ERR("%s is not a character device.\n", device);
return STATUS_OBJECT_TYPE_MISMATCH;
}
if ((fd = open(device, O_RDWR | O_NONBLOCK)) < 0)
{
ERR("%s: Failed to open: %s\n", device, strerror(errno));
return STATUS_UNSUCCESSFUL;
}
if (!xioctl(fd, VIDIOC_QUERYCAP, &caps))
{
BOOL is_capture_device;
#ifdef V4L2_CAP_DEVICE_CAPS
if (caps.capabilities & V4L2_CAP_DEVICE_CAPS)
is_capture_device = caps.device_caps & V4L2_CAP_VIDEO_CAPTURE;
else
#endif
is_capture_device = caps.capabilities & V4L2_CAP_VIDEO_CAPTURE;
if (is_capture_device)
{
char version[CAP_DESC_MAX];
int ret;
v4l_umbstowcs((char *)caps.card, strlen((char *)caps.card),
params->name, ARRAY_SIZE(params->name));
ret = snprintf(version, ARRAY_SIZE(version), "%s v%u.%u.%u", (char *)caps.driver,
(caps.version >> 16) & 0xff, (caps.version >> 8) & 0xff, caps.version & 0xff);
v4l_umbstowcs(version, ret, params->version, ARRAY_SIZE(params->version));
}
close(fd);
return is_capture_device;
}
/* errno 515 is used by some webcam drivers for unknown IOCTL commands. */
ERR("Failed to get capabilities for %s: %s\n", device, strerror(errno));
close(fd);
return FALSE;
}
const unixlib_entry_t __wine_unix_call_funcs[] =
{
get_device_desc,
};
#endif /* HAVE_LINUX_VIDEODEV_2 */