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v4l2: Don't warn when optional CID are not implement

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gst_v4l2_get_attributre() shall only be used when the CID is expected
to be supported. Otherwise, we get unwanted warning posted to the bus.
This commit is contained in:
Nicolas Dufresne 2015-06-05 15:32:10 -04:00
parent d650a310da
commit 0196fdb5ec
1 changed files with 10 additions and 11 deletions
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21
sys/v4l2/gstv4l2object.c
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@ -723,20 +723,19 @@ gst_v4l2_object_get_property_helper (GstV4l2Object * v4l2object,
static void
gst_v4l2_get_driver_min_buffers (GstV4l2Object * v4l2object)
{
int min;
gboolean ret = FALSE;
struct v4l2_control control = { 0, };
/* Certain driver may expose a minimum number of buffers through controls. */
/* If the ioctl is not supported by the driver, min_buffers remains zero. */
ret = gst_v4l2_get_attribute (v4l2object,
V4L2_TYPE_IS_OUTPUT (v4l2object->type)
? V4L2_CID_MIN_BUFFERS_FOR_OUTPUT : V4L2_CID_MIN_BUFFERS_FOR_CAPTURE,
&min);
g_return_if_fail (GST_V4L2_IS_OPEN (v4l2object));
if (ret) {
if (V4L2_TYPE_IS_OUTPUT (v4l2object->type))
control.id = V4L2_CID_MIN_BUFFERS_FOR_OUTPUT;
else
control.id = V4L2_CID_MIN_BUFFERS_FOR_CAPTURE;
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) == 0) {
GST_DEBUG_OBJECT (v4l2object->element,
"driver requires a minimum of %d buffers", min);
v4l2object->min_buffers = min;
"driver requires a minimum of %d buffers", control.value);
v4l2object->min_buffers = control.value;
} else {
v4l2object->min_buffers = 0;
}