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v4l2: enforce a pixel aspect ratio of 1/1 if no data are available

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6242>
This commit is contained in:
Tim Blechmann 2024-02-28 11:28:23 +08:00 committed by GStreamer Marge Bot
parent 27fc705bb2
commit 1c9fe19b23
1 changed files with 18 additions and 4 deletions
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22
subprojects/gst-plugins-good/sys/v4l2/gstv4l2object.c
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@ -5002,10 +5002,24 @@ gst_v4l2_object_probe_caps (GstV4l2Object * v4l2object, GstCaps * filter)
cropcap.type = v4l2object->type;
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_CROPCAP, &cropcap) < 0) {
if (errno != ENOTTY)
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Failed to probe pixel aspect ratio with VIDIOC_CROPCAP: %s",
g_strerror (errno));
switch (errno) {
case ENODATA:
case ENOTTY:
GST_INFO_OBJECT (v4l2object->dbg_obj,
"Driver does not support VIDIOC_CROPCAP (%s), assuming pixel aspect ratio 1/1",
g_strerror (errno));
break;
default:
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Failed to probe pixel aspect ratio with VIDIOC_CROPCAP: %s",
g_strerror (errno));
}
v4l2object->par = g_new0 (GValue, 1);
g_value_init (v4l2object->par, GST_TYPE_FRACTION);
gst_value_set_fraction (v4l2object->par, 1, 1);
} else if (cropcap.pixelaspect.numerator && cropcap.pixelaspect.denominator) {
v4l2object->par = g_new0 (GValue, 1);
g_value_init (v4l2object->par, GST_TYPE_FRACTION);