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sys/v4l2/v4l2_calls.c: add comments and more debug logging

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Original commit message from CVS:
* sys/v4l2/v4l2_calls.c: (gst_v4l2_fill_lists):
add comments and more debug logging
This commit is contained in:
Stefan Kost 2006-08-28 14:59:05 +00:00
parent 3b4f4554a6
commit 7c063cc950
1 changed files with 16 additions and 4 deletions
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20
sys/v4l2/v4l2_calls.c
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@ -85,6 +85,7 @@ gst_v4l2_fill_lists (GstV4l2Object * v4l2object)
if (dir != GST_PAD_SINK) {
#endif /* #if 0 - output not handled by now */
GST_DEBUG_OBJECT (v4l2object->element, " inputs");
/* and now, the inputs */
for (n = 0;; n++) {
struct v4l2_input input;
@ -180,6 +181,7 @@ gst_v4l2_fill_lists (GstV4l2Object * v4l2object)
}
#endif /* #if 0 - output not handled by now */
GST_DEBUG_OBJECT (v4l2object->element, " norms");
/* norms... */
for (n = 0;; n++) {
struct v4l2_standard standard;
@ -208,20 +210,24 @@ gst_v4l2_fill_lists (GstV4l2Object * v4l2object)
v4l2object->stds = g_list_append (v4l2object->stds, (gpointer) norm);
}
GST_DEBUG_OBJECT (v4l2object->element, " controls+menus");
/* and lastly, controls+menus (if appropriate) */
for (n = V4L2_CID_BASE;; n++) {
struct v4l2_queryctrl control;
GstV4l2ColorBalanceChannel *v4l2channel;
GstColorBalanceChannel *channel;
/* hacky... */
if (n == V4L2_CID_LASTP1)
/* when we reached the last official CID, continue with private CIDs */
if (n == V4L2_CID_LASTP1) {
GST_DEBUG_OBJECT (v4l2object->element, "chhecking private CIDs");
n = V4L2_CID_PRIVATE_BASE;
}
control.id = n;
if (ioctl (v4l2object->video_fd, VIDIOC_QUERYCTRL, &control) < 0) {
if (errno == EINVAL) {
if (n < V4L2_CID_PRIVATE_BASE)
/* continue so that we also check private controls */
continue;
else
break;
@ -249,17 +255,19 @@ gst_v4l2_fill_lists (GstV4l2Object * v4l2object)
case V4L2_CID_EXPOSURE:
case V4L2_CID_AUTOGAIN:
case V4L2_CID_GAIN:
/* we only handle these for now */
/* we only handle these for now (why?) */
break;
default:
GST_DEBUG_OBJECT (v4l2object->element,
"ControlID %s (%d) unhandled, FIXME", control.name, n);
"ControlID %s (%x) unhandled, FIXME", control.name, n);
control.id++;
break;
}
if (n != control.id)
continue;
GST_DEBUG_OBJECT (v4l2object->element,
"Adding ControlID %s (%x)", control.name, n);
v4l2channel = g_object_new (GST_TYPE_V4L2_COLOR_BALANCE_CHANNEL, NULL);
channel = GST_COLOR_BALANCE_CHANNEL (v4l2channel);
channel->label = g_strdup ((const gchar *) control.name);
@ -301,6 +309,9 @@ gst_v4l2_fill_lists (GstV4l2Object * v4l2object)
channel->max_value = TRUE;
break;
default:
GST_DEBUG_OBJECT (v4l2object->element,
"No range for ControlID %s (%x), type=%d",
control.name, n, control.type);
channel->min_value = channel->max_value = 0;
break;
}
@ -308,6 +319,7 @@ gst_v4l2_fill_lists (GstV4l2Object * v4l2object)
v4l2object->colors = g_list_append (v4l2object->colors, (gpointer) channel);
}
GST_DEBUG_OBJECT (v4l2object->element, "done");
return TRUE;
}