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Merge pull request #12405 from todortomov:3.4_cap_v4l_query_conrtols

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Alexander Alekhin 2018-09-04 12:55:05 +00:00
commit e5236cecd6
1 changed files with 3 additions and 1 deletions
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4
modules/videoio/src/cap_v4l.cpp
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@ -512,9 +512,11 @@ static void v4l2_scan_controls(CvCaptureCAM_V4L* capture)
for (ctrl_id = V4L2_CID_PRIVATE_BASE;;ctrl_id++) for (ctrl_id = V4L2_CID_PRIVATE_BASE;;ctrl_id++)
{ {
errno = 0;
v4l2_control_range(capture, ctrl_id); v4l2_control_range(capture, ctrl_id);
if (errno == EINVAL) if (errno)
break; break;
} }