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git://source.winehq.org/git/wine.git
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ea15a5445f
get_device_desc() should return a NTSTATUS instead of a BOOL. Fix a regression that video capture
devices cannot be opened because of the changes in abb1757.
Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
/*
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* Copyright 2002 Dmitry Timoshkov for CodeWeavers
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* Copyright 2005 Maarten Lankhorst
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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 2.1 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 St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#if 0
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#pragma makedep unix
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#endif
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#include "config.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <unistd.h>
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#ifdef HAVE_SYS_IOCTL_H
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# include <sys/ioctl.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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# include <sys/stat.h>
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#endif
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#ifdef HAVE_LINUX_VIDEODEV2_H
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# include <linux/videodev2.h>
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#endif
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.h"
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#include "wine/debug.h"
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#include "unixlib.h"
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#ifdef HAVE_LINUX_VIDEODEV2_H
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WINE_DEFAULT_DEBUG_CHANNEL(avicap);
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static int xioctl(int fd, int request, void *arg)
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{
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int ret;
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do
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ret = ioctl(fd, request, arg);
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while (ret < 0 && errno == EINTR);
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return ret;
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}
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static void v4l_umbstowcs(const char *src, DWORD srclen, WCHAR *dst, DWORD dstlen)
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{
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DWORD ret = ntdll_umbstowcs(src, srclen, dst, dstlen - 1);
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dst[ret] = 0;
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}
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static NTSTATUS get_device_desc(void *args)
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{
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struct get_device_desc_params *params = args;
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struct v4l2_capability caps = {{0}};
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char device[16];
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struct stat st;
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int fd;
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snprintf(device, sizeof(device), "/dev/video%u", params->index);
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if (stat(device, &st) < 0)
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{
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/* This is probably because the device does not exist */
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WARN("Failed to stat %s: %s\n", device, strerror(errno));
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return STATUS_OBJECT_NAME_NOT_FOUND;
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}
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if (!S_ISCHR(st.st_mode))
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{
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ERR("%s is not a character device.\n", device);
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return STATUS_OBJECT_TYPE_MISMATCH;
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}
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if ((fd = open(device, O_RDWR | O_NONBLOCK)) < 0)
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{
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ERR("%s: Failed to open: %s\n", device, strerror(errno));
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return STATUS_UNSUCCESSFUL;
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}
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if (!xioctl(fd, VIDIOC_QUERYCAP, &caps))
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{
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BOOL is_capture_device;
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#ifdef V4L2_CAP_DEVICE_CAPS
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if (caps.capabilities & V4L2_CAP_DEVICE_CAPS)
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is_capture_device = caps.device_caps & V4L2_CAP_VIDEO_CAPTURE;
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else
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#endif
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is_capture_device = caps.capabilities & V4L2_CAP_VIDEO_CAPTURE;
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if (is_capture_device)
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{
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char version[CAP_DESC_MAX];
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int ret;
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v4l_umbstowcs((char *)caps.card, strlen((char *)caps.card),
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params->name, ARRAY_SIZE(params->name));
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ret = snprintf(version, ARRAY_SIZE(version), "%s v%u.%u.%u", (char *)caps.driver,
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(caps.version >> 16) & 0xff, (caps.version >> 8) & 0xff, caps.version & 0xff);
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v4l_umbstowcs(version, ret, params->version, ARRAY_SIZE(params->version));
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}
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close(fd);
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return is_capture_device ? STATUS_SUCCESS : STATUS_UNSUCCESSFUL;
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}
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/* errno 515 is used by some webcam drivers for unknown IOCTL commands. */
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ERR("Failed to get capabilities for %s: %s\n", device, strerror(errno));
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close(fd);
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return STATUS_UNSUCCESSFUL;
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}
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const unixlib_entry_t __wine_unix_call_funcs[] =
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{
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get_device_desc,
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};
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#endif /* HAVE_LINUX_VIDEODEV_2 */
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