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changed icvSetVideoSize function (ticket #1067)

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This commit is contained in:
Alexander Reshetnikov 2012-03-28 16:14:36 +00:00
parent 84c9990632
commit 2a68228b66
1 changed files with 15 additions and 8 deletions
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17
modules/highgui/src/cap_v4l.cpp
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@ -2427,15 +2427,22 @@ static int icvSetVideoSize( CvCaptureCAM_V4L* capture, int w, int h) {
if (V4L2_SUPPORT == 1)
{
CLEAR (capture->cropcap);
capture->cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (xioctl (capture->deviceHandle, VIDIOC_CROPCAP, &capture->cropcap) < 0) {
fprintf(stderr, "HIGHGUI ERROR: V4L/V4L2: VIDIOC_CROPCAP\n");
} else {
CLEAR (capture->crop);
capture->crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
capture->crop.c.left = 0;
capture->crop.c.top = 0;
capture->crop.c.height = h*24;
capture->crop.c.width = w*24;
capture->crop.c= capture->cropcap.defrect;
/* set the crop area, but don't exit if the device don't support croping */
xioctl (capture->deviceHandle, VIDIOC_S_CROP, &capture->crop);
if (xioctl (capture->deviceHandle, VIDIOC_S_CROP, &capture->crop) < 0) {
fprintf(stderr, "HIGHGUI ERROR: V4L/V4L2: VIDIOC_S_CROP\n");
}
}
CLEAR (capture->form);
capture->form.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;