From e575e4eda82d0a3a0ab3a58f62d24d7a47fcc32b Mon Sep 17 00:00:00 2001
From: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Date: Wed, 13 Dec 2017 14:39:47 -0500
Subject: [PATCH] v4l2object: Use a debug object for tracing

This way we can pass the pad name instead of the element for tracing
which helps identifying which v4l2object is used withing M2M element
like decoder, encoder and transform. For the reference, pads are name
<parent-name>:<pad-name>.
---
 sys/v4l2/gstv4l2deviceprovider.c |   2 +-
 sys/v4l2/gstv4l2object.c         | 230 ++++++++++++++++++++-------------------
 sys/v4l2/gstv4l2object.h         |   2 +
 sys/v4l2/gstv4l2radio.c          |   2 +-
 sys/v4l2/gstv4l2sink.c           |   4 +-
 sys/v4l2/gstv4l2src.c            |   4 +-
 sys/v4l2/gstv4l2transform.c      |   2 +
 sys/v4l2/gstv4l2videodec.c       |   2 +
 sys/v4l2/gstv4l2videoenc.c       |   2 +
 sys/v4l2/v4l2_calls.c            |  40 +++----
 10 files changed, 150 insertions(+), 140 deletions(-)

diff --git a/sys/v4l2/gstv4l2deviceprovider.c b/sys/v4l2/gstv4l2deviceprovider.c
index 0f050ab..06d86c9 100644
--- a/sys/v4l2/gstv4l2deviceprovider.c
+++ b/sys/v4l2/gstv4l2deviceprovider.c
@@ -113,7 +113,7 @@ gst_v4l2_device_provider_probe_device (GstV4l2DeviceProvider * provider,
   if (!S_ISCHR (st.st_mode))
     goto destroy;
 
-  v4l2obj = gst_v4l2_object_new ((GstElement *) provider,
+  v4l2obj = gst_v4l2_object_new (NULL, GST_OBJECT (provider),
       V4L2_BUF_TYPE_VIDEO_CAPTURE, device_path, NULL, NULL, NULL);
 
   if (!gst_v4l2_open (v4l2obj))
diff --git a/sys/v4l2/gstv4l2object.c b/sys/v4l2/gstv4l2object.c
index e13284c..bf1a88c 100644
--- a/sys/v4l2/gstv4l2object.c
+++ b/sys/v4l2/gstv4l2object.c
@@ -460,6 +460,7 @@ gst_v4l2_object_install_m2m_properties_helper (GObjectClass * gobject_class)
 
 GstV4l2Object *
 gst_v4l2_object_new (GstElement * element,
+    GstObject * debug_object,
     enum v4l2_buf_type type,
     const char *default_device,
     GstV4l2GetInOutFunction get_in_out_func,
@@ -477,6 +478,7 @@ gst_v4l2_object_new (GstElement * element,
   v4l2object->formats = NULL;
 
   v4l2object->element = element;
+  v4l2object->dbg_obj = debug_object;
   v4l2object->get_in_out_func = get_in_out_func;
   v4l2object->set_in_out_func = set_in_out_func;
   v4l2object->update_fps_func = update_fps_func;
@@ -680,7 +682,7 @@ gst_v4l2_object_set_property_helper (GstV4l2Object * v4l2object,
         gst_value_set_fraction (v4l2object->par, 1, 1);
       }
 
-      GST_DEBUG_OBJECT (v4l2object->element, "set PAR to %d/%d",
+      GST_DEBUG_OBJECT (v4l2object->dbg_obj, "set PAR to %d/%d",
           gst_value_get_fraction_numerator (v4l2object->par),
           gst_value_get_fraction_denominator (v4l2object->par));
       break;
@@ -807,7 +809,7 @@ gst_v4l2_get_driver_min_buffers (GstV4l2Object * v4l2object)
     control.id = V4L2_CID_MIN_BUFFERS_FOR_CAPTURE;
 
   if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) == 0) {
-    GST_DEBUG_OBJECT (v4l2object->element,
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj,
         "driver requires a minimum of %d buffers", control.value);
     v4l2object->min_buffers = control.value;
   } else {
@@ -829,7 +831,7 @@ gst_v4l2_set_defaults (GstV4l2Object * v4l2object)
 
   if (v4l2object->tv_norm)
     norm = gst_v4l2_tuner_get_norm_by_std_id (v4l2object, v4l2object->tv_norm);
-  GST_DEBUG_OBJECT (v4l2object->element, "tv_norm=0x%" G_GINT64_MODIFIER "x, "
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "tv_norm=0x%" G_GINT64_MODIFIER "x, "
       "norm=%p", (guint64) v4l2object->tv_norm, norm);
   if (norm) {
     gst_tuner_set_norm (tuner, norm);
@@ -1141,7 +1143,7 @@ gst_v4l2_object_fill_format_list (GstV4l2Object * v4l2object,
   gint n;
   struct v4l2_fmtdesc *format;
 
-  GST_DEBUG_OBJECT (v4l2object->element, "getting src format enumerations");
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "getting src format enumerations");
 
   /* format enumeration */
   for (n = 0;; n++) {
@@ -1159,12 +1161,12 @@ gst_v4l2_object_fill_format_list (GstV4l2Object * v4l2object,
       }
     }
 
-    GST_LOG_OBJECT (v4l2object->element, "index:       %u", format->index);
-    GST_LOG_OBJECT (v4l2object->element, "type:        %d", format->type);
-    GST_LOG_OBJECT (v4l2object->element, "flags:       %08x", format->flags);
-    GST_LOG_OBJECT (v4l2object->element, "description: '%s'",
+    GST_LOG_OBJECT (v4l2object->dbg_obj, "index:       %u", format->index);
+    GST_LOG_OBJECT (v4l2object->dbg_obj, "type:        %d", format->type);
+    GST_LOG_OBJECT (v4l2object->dbg_obj, "flags:       %08x", format->flags);
+    GST_LOG_OBJECT (v4l2object->dbg_obj, "description: '%s'",
         format->description);
-    GST_LOG_OBJECT (v4l2object->element, "pixelformat: %" GST_FOURCC_FORMAT,
+    GST_LOG_OBJECT (v4l2object->dbg_obj, "pixelformat: %" GST_FOURCC_FORMAT,
         GST_FOURCC_ARGS (format->pixelformat));
 
     /* sort formats according to our preference;  we do this, because caps
@@ -1178,11 +1180,11 @@ gst_v4l2_object_fill_format_list (GstV4l2Object * v4l2object,
   {
     GSList *l;
 
-    GST_INFO_OBJECT (v4l2object->element, "got %d format(s):", n);
+    GST_INFO_OBJECT (v4l2object->dbg_obj, "got %d format(s):", n);
     for (l = v4l2object->formats; l != NULL; l = l->next) {
       format = l->data;
 
-      GST_INFO_OBJECT (v4l2object->element,
+      GST_INFO_OBJECT (v4l2object->dbg_obj,
           "  %" GST_FOURCC_FORMAT "%s", GST_FOURCC_ARGS (format->pixelformat),
           ((format->flags & V4L2_FMT_FLAG_EMULATED)) ? " (emulated)" : "");
     }
@@ -1196,7 +1198,7 @@ failed:
   {
     g_free (format);
 
-    if (!GST_IS_ELEMENT (v4l2object->element))
+    if (v4l2object->element)
       return FALSE;
 
     GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
@@ -2124,7 +2126,7 @@ gst_v4l2_object_try_fmt (GstV4l2Object * v4l2object,
 
 error:
   memcpy (try_fmt, &fmt, sizeof (fmt));
-  GST_WARNING_OBJECT (v4l2object->element,
+  GST_WARNING_OBJECT (v4l2object->dbg_obj,
       "Unable to try format: %s", g_strerror (errno));
   return r;
 }
@@ -2305,7 +2307,7 @@ gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
   ival.width = width;
   ival.height = height;
 
-  GST_LOG_OBJECT (v4l2object->element,
+  GST_LOG_OBJECT (v4l2object->dbg_obj,
       "get frame interval for %ux%u, %" GST_FOURCC_FORMAT, width, height,
       GST_FOURCC_ARGS (pixelformat));
 
@@ -2330,7 +2332,7 @@ gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
         denom >>= 1;
       }
 
-      GST_LOG_OBJECT (v4l2object->element, "adding discrete framerate: %d/%d",
+      GST_LOG_OBJECT (v4l2object->dbg_obj, "adding discrete framerate: %d/%d",
           denom, num);
 
       /* swap to get the framerate */
@@ -2360,7 +2362,7 @@ gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
       minnum >>= 1;
       mindenom >>= 1;
     }
-    GST_LOG_OBJECT (v4l2object->element, "stepwise min frame interval: %d/%d",
+    GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise min frame interval: %d/%d",
         minnum, mindenom);
     gst_value_set_fraction (&min, minnum, mindenom);
 
@@ -2372,7 +2374,7 @@ gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
       maxdenom >>= 1;
     }
 
-    GST_LOG_OBJECT (v4l2object->element, "stepwise max frame interval: %d/%d",
+    GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise max frame interval: %d/%d",
         maxnum, maxdenom);
     gst_value_set_fraction (&max, maxnum, maxdenom);
 
@@ -2393,7 +2395,7 @@ gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
 
     /* since we only have gst_value_fraction_subtract and not add, negate the
      * numerator */
-    GST_LOG_OBJECT (v4l2object->element, "stepwise step frame interval: %d/%d",
+    GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise step frame interval: %d/%d",
         num, denom);
     gst_value_set_fraction (&step, -num, denom);
 
@@ -2402,7 +2404,7 @@ gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
 
       num = gst_value_get_fraction_numerator (&min);
       denom = gst_value_get_fraction_denominator (&min);
-      GST_LOG_OBJECT (v4l2object->element, "adding stepwise framerate: %d/%d",
+      GST_LOG_OBJECT (v4l2object->dbg_obj, "adding stepwise framerate: %d/%d",
           denom, num);
 
       /* invert to get the framerate */
@@ -2414,13 +2416,13 @@ gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
       /* we're actually adding because step was negated above. This is because
        * there is no _add function... */
       if (!gst_value_fraction_subtract (&min, &min, &step)) {
-        GST_WARNING_OBJECT (v4l2object->element, "could not step fraction!");
+        GST_WARNING_OBJECT (v4l2object->dbg_obj, "could not step fraction!");
         break;
       }
     }
     if (!added) {
       /* no range was added, leave the default range from the template */
-      GST_WARNING_OBJECT (v4l2object->element,
+      GST_WARNING_OBJECT (v4l2object->dbg_obj,
           "no range added, leaving default");
       g_value_unset (&rates);
     }
@@ -2443,7 +2445,7 @@ gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
       maxdenom >>= 1;
     }
 
-    GST_LOG_OBJECT (v4l2object->element,
+    GST_LOG_OBJECT (v4l2object->dbg_obj,
         "continuous frame interval %d/%d to %d/%d", maxdenom, maxnum, denom,
         num);
 
@@ -2480,7 +2482,7 @@ return_data:
   /* ERRORS */
 enum_frameintervals_failed:
   {
-    GST_DEBUG_OBJECT (v4l2object->element,
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj,
         "Unable to enumerate intervals for %" GST_FOURCC_FORMAT "@%ux%u",
         GST_FOURCC_ARGS (pixelformat), width, height);
     goto return_data;
@@ -2488,7 +2490,7 @@ enum_frameintervals_failed:
 unknown_type:
   {
     /* I don't see how this is actually an error, we ignore the format then */
-    GST_WARNING_OBJECT (v4l2object->element,
+    GST_WARNING_OBJECT (v4l2object->dbg_obj,
         "Unknown frame interval type at %" GST_FOURCC_FORMAT "@%ux%u: %u",
         GST_FOURCC_ARGS (pixelformat), width, height, ival.type);
     return NULL;
@@ -2573,7 +2575,7 @@ gst_v4l2_object_probe_caps_for_format (GstV4l2Object * v4l2object,
   size.index = 0;
   size.pixel_format = pixelformat;
 
-  GST_DEBUG_OBJECT (v4l2object->element,
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj,
       "Enumerating frame sizes for %" GST_FOURCC_FORMAT,
       GST_FOURCC_ARGS (pixelformat));
 
@@ -2582,7 +2584,7 @@ gst_v4l2_object_probe_caps_for_format (GstV4l2Object * v4l2object,
 
   if (size.type == V4L2_FRMSIZE_TYPE_DISCRETE) {
     do {
-      GST_LOG_OBJECT (v4l2object->element, "got discrete frame size %dx%d",
+      GST_LOG_OBJECT (v4l2object->dbg_obj, "got discrete frame size %dx%d",
           size.discrete.width, size.discrete.height);
 
       w = MIN (size.discrete.width, G_MAXINT);
@@ -2599,23 +2601,23 @@ gst_v4l2_object_probe_caps_for_format (GstV4l2Object * v4l2object,
 
       size.index++;
     } while (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) >= 0);
-    GST_DEBUG_OBJECT (v4l2object->element,
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj,
         "done iterating discrete frame sizes");
   } else if (size.type == V4L2_FRMSIZE_TYPE_STEPWISE) {
     guint32 maxw, maxh, step_w, step_h;
 
-    GST_DEBUG_OBJECT (v4l2object->element, "we have stepwise frame sizes:");
-    GST_DEBUG_OBJECT (v4l2object->element, "min width:   %d",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "we have stepwise frame sizes:");
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min width:   %d",
         size.stepwise.min_width);
-    GST_DEBUG_OBJECT (v4l2object->element, "min height:  %d",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height:  %d",
         size.stepwise.min_height);
-    GST_DEBUG_OBJECT (v4l2object->element, "max width:   %d",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "max width:   %d",
         size.stepwise.max_width);
-    GST_DEBUG_OBJECT (v4l2object->element, "min height:  %d",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height:  %d",
         size.stepwise.max_height);
-    GST_DEBUG_OBJECT (v4l2object->element, "step width:  %d",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "step width:  %d",
         size.stepwise.step_width);
-    GST_DEBUG_OBJECT (v4l2object->element, "step height: %d",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "step height: %d",
         size.stepwise.step_height);
 
     w = MAX (size.stepwise.min_width, 1);
@@ -2649,14 +2651,14 @@ gst_v4l2_object_probe_caps_for_format (GstV4l2Object * v4l2object,
   } else if (size.type == V4L2_FRMSIZE_TYPE_CONTINUOUS) {
     guint32 maxw, maxh;
 
-    GST_DEBUG_OBJECT (v4l2object->element, "we have continuous frame sizes:");
-    GST_DEBUG_OBJECT (v4l2object->element, "min width:   %d",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "we have continuous frame sizes:");
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min width:   %d",
         size.stepwise.min_width);
-    GST_DEBUG_OBJECT (v4l2object->element, "min height:  %d",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height:  %d",
         size.stepwise.min_height);
-    GST_DEBUG_OBJECT (v4l2object->element, "max width:   %d",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "max width:   %d",
         size.stepwise.max_width);
-    GST_DEBUG_OBJECT (v4l2object->element, "min height:  %d",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height:  %d",
         size.stepwise.max_height);
 
     w = MAX (size.stepwise.min_width, 1);
@@ -2700,7 +2702,7 @@ gst_v4l2_object_probe_caps_for_format (GstV4l2Object * v4l2object,
 enum_framesizes_failed:
   {
     /* I don't see how this is actually an error */
-    GST_DEBUG_OBJECT (v4l2object->element,
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj,
         "Failed to enumerate frame sizes for pixelformat %" GST_FOURCC_FORMAT
         " (%s)", GST_FOURCC_ARGS (pixelformat), g_strerror (errno));
     goto default_frame_sizes;
@@ -2709,7 +2711,7 @@ enum_framesizes_no_results:
   {
     /* it's possible that VIDIOC_ENUM_FRAMESIZES is defined but the driver in
      * question doesn't actually support it yet */
-    GST_DEBUG_OBJECT (v4l2object->element,
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj,
         "No results for pixelformat %" GST_FOURCC_FORMAT
         " enumerating frame sizes, trying fallback",
         GST_FOURCC_ARGS (pixelformat));
@@ -2717,7 +2719,7 @@ enum_framesizes_no_results:
   }
 unknown_type:
   {
-    GST_WARNING_OBJECT (v4l2object->element,
+    GST_WARNING_OBJECT (v4l2object->dbg_obj,
         "Unknown frame sizeenum type for pixelformat %" GST_FOURCC_FORMAT
         ": %u", GST_FOURCC_ARGS (pixelformat), size.type);
     goto default_frame_sizes;
@@ -2732,13 +2734,13 @@ default_frame_sizes:
     max_w = max_h = GST_V4L2_MAX_SIZE;
     if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat, &min_w,
             &min_h)) {
-      GST_WARNING_OBJECT (v4l2object->element,
+      GST_WARNING_OBJECT (v4l2object->dbg_obj,
           "Could not probe minimum capture size for pixelformat %"
           GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
     }
     if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat, &max_w,
             &max_h)) {
-      GST_WARNING_OBJECT (v4l2object->element,
+      GST_WARNING_OBJECT (v4l2object->dbg_obj,
           "Could not probe maximum capture size for pixelformat %"
           GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
     }
@@ -2811,7 +2813,7 @@ gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
   g_return_val_if_fail (width != NULL, FALSE);
   g_return_val_if_fail (height != NULL, FALSE);
 
-  GST_LOG_OBJECT (v4l2object->element,
+  GST_LOG_OBJECT (v4l2object->dbg_obj,
       "getting nearest size to %dx%d with format %" GST_FOURCC_FORMAT,
       *width, *height, GST_FOURCC_ARGS (pixelformat));
 
@@ -2828,14 +2830,14 @@ gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
   if (gst_v4l2_object_try_fmt (v4l2object, &fmt) < 0)
     goto error;
 
-  GST_LOG_OBJECT (v4l2object->element,
+  GST_LOG_OBJECT (v4l2object->dbg_obj,
       "got nearest size %dx%d", fmt.fmt.pix.width, fmt.fmt.pix.height);
 
   *width = fmt.fmt.pix.width;
   *height = fmt.fmt.pix.height;
 
   if (!gst_v4l2_object_get_interlace_mode (fmt.fmt.pix.field, &interlace_mode)) {
-    GST_WARNING_OBJECT (v4l2object->element,
+    GST_WARNING_OBJECT (v4l2object->dbg_obj,
         "Unsupported field type for %" GST_FOURCC_FORMAT "@%ux%u: %u",
         GST_FOURCC_ARGS (pixelformat), *width, *height, fmt.fmt.pix.field);
     goto error;
@@ -2845,7 +2847,7 @@ gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
 
 error:
   if (!ret) {
-    GST_WARNING_OBJECT (v4l2object->element,
+    GST_WARNING_OBJECT (v4l2object->dbg_obj,
         "Unable to try format: %s", g_strerror (errno));
   }
 
@@ -2876,7 +2878,7 @@ gst_v4l2_object_setup_pool (GstV4l2Object * v4l2object, GstCaps * caps)
 {
   GstV4l2IOMode mode;
 
-  GST_DEBUG_OBJECT (v4l2object->element, "initializing the %s system",
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "initializing the %s system",
       V4L2_TYPE_IS_OUTPUT (v4l2object->type) ? "output" : "capture");
 
   GST_V4L2_CHECK_OPEN (v4l2object);
@@ -2907,7 +2909,7 @@ gst_v4l2_object_setup_pool (GstV4l2Object * v4l2object, GstCaps * caps)
   if (mode == GST_V4L2_IO_AUTO)
     goto no_supported_capture_method;
 
-  GST_INFO_OBJECT (v4l2object->element, "accessing buffers via mode %d", mode);
+  GST_INFO_OBJECT (v4l2object->dbg_obj, "accessing buffers via mode %d", mode);
   v4l2object->mode = mode;
 
   /* If min_buffers is not set, the driver either does not support the control or
@@ -2916,7 +2918,7 @@ gst_v4l2_object_setup_pool (GstV4l2Object * v4l2object, GstCaps * caps)
     gst_v4l2_get_driver_min_buffers (v4l2object);
 
   /* Map the buffers */
-  GST_LOG_OBJECT (v4l2object->element, "initiating buffer pool");
+  GST_LOG_OBJECT (v4l2object->dbg_obj, "initiating buffer pool");
 
   if (!(v4l2object->pool = gst_v4l2_buffer_pool_new (v4l2object, caps)))
     goto buffer_pool_new_failed;
@@ -2997,7 +2999,7 @@ gst_v4l2_object_extrapolate_info (GstV4l2Object * v4l2object,
     offs += estride *
         GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i, padded_height);
 
-    GST_DEBUG_OBJECT (v4l2object->element,
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj,
         "Extrapolated for plane %d with base stride %d: "
         "stride %d, offset %" G_GSIZE_FORMAT, i, stride, info->stride[i],
         info->offset[i]);
@@ -3035,7 +3037,7 @@ gst_v4l2_object_save_format (GstV4l2Object * v4l2object,
   padded_width = stride / GST_VIDEO_FORMAT_INFO_PSTRIDE (finfo, 0);
 
   if (padded_width < format->fmt.pix.width)
-    GST_WARNING_OBJECT (v4l2object->element,
+    GST_WARNING_OBJECT (v4l2object->dbg_obj,
         "Driver bug detected, stride is too small for the width");
 
   align->padding_right = padded_width - info->width - align->padding_left;
@@ -3092,7 +3094,7 @@ gst_v4l2_object_save_format (GstV4l2Object * v4l2object,
   /* adjust the offset to take into account left and top */
   if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
     if ((align->padding_left + align->padding_top) > 0)
-      GST_WARNING_OBJECT (v4l2object->element,
+      GST_WARNING_OBJECT (v4l2object->dbg_obj,
           "Left and top padding is not permitted for tiled formats");
   } else {
     for (i = 0; i < finfo->n_planes; i++) {
@@ -3110,7 +3112,7 @@ gst_v4l2_object_save_format (GstV4l2Object * v4l2object,
   }
 
 store_info:
-  GST_DEBUG_OBJECT (v4l2object->element, "Got sizeimage %" G_GSIZE_FORMAT,
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got sizeimage %" G_GSIZE_FORMAT,
       info->size);
 
   /* to avoid copies we need video meta if there is padding */
@@ -3214,13 +3216,13 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
     n_v4l_planes = 1;
 
   if (GST_VIDEO_INFO_IS_INTERLACED (&info)) {
-    GST_DEBUG_OBJECT (v4l2object->element, "interlaced video");
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "interlaced video");
     /* ideally we would differentiate between types of interlaced video
      * but there is not sufficient information in the caps..
      */
     field = V4L2_FIELD_INTERLACED;
   } else {
-    GST_DEBUG_OBJECT (v4l2object->element, "progressive video");
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "progressive video");
     field = V4L2_FIELD_NONE;
   }
 
@@ -3257,7 +3259,7 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
         break;
 
       default:
-        GST_WARNING_OBJECT (v4l2object->element,
+        GST_WARNING_OBJECT (v4l2object->dbg_obj,
             "Unknown colorimetry primaries %d", info.colorimetry.primaries);
         break;
     }
@@ -3273,7 +3275,7 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
         /* We let the driver pick a default one */
         break;
       default:
-        GST_WARNING_OBJECT (v4l2object->element,
+        GST_WARNING_OBJECT (v4l2object->dbg_obj,
             "Unknown colorimetry range %d", info.colorimetry.range);
         break;
     }
@@ -3300,7 +3302,7 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
         /* We let the driver pick a default one */
         break;
       default:
-        GST_WARNING_OBJECT (v4l2object->element,
+        GST_WARNING_OBJECT (v4l2object->dbg_obj,
             "Unknown colorimetry matrix %d", info.colorimetry.matrix);
         break;
     }
@@ -3310,7 +3312,7 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
       case GST_VIDEO_TRANSFER_GAMMA20:
       case GST_VIDEO_TRANSFER_GAMMA22:
       case GST_VIDEO_TRANSFER_GAMMA28:
-        GST_WARNING_OBJECT (v4l2object->element,
+        GST_WARNING_OBJECT (v4l2object->dbg_obj,
             "GAMMA 18, 20, 22, 28 transfer functions not supported");
         /* fallthrough */
       case GST_VIDEO_TRANSFER_GAMMA10:
@@ -3328,7 +3330,7 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
         break;
       case GST_VIDEO_TRANSFER_LOG100:
       case GST_VIDEO_TRANSFER_LOG316:
-        GST_WARNING_OBJECT (v4l2object->element,
+        GST_WARNING_OBJECT (v4l2object->dbg_obj,
             "LOG 100, 316 transfer functions not supported");
         /* FIXME No known sensible default, maybe AdobeRGB ? */
         break;
@@ -3336,7 +3338,7 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
         /* We let the driver pick a default one */
         break;
       default:
-        GST_WARNING_OBJECT (v4l2object->element,
+        GST_WARNING_OBJECT (v4l2object->dbg_obj,
             "Unknown colorimetry tranfer %d", info.colorimetry.transfer);
         break;
     }
@@ -3356,7 +3358,7 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
     }
   }
 
-  GST_DEBUG_OBJECT (v4l2object->element, "Desired format %dx%d, format "
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired format %dx%d, format "
       "%" GST_FOURCC_FORMAT " stride: %d", width, height,
       GST_FOURCC_ARGS (pixelformat), GST_VIDEO_INFO_PLANE_STRIDE (&info, 0));
 
@@ -3405,7 +3407,7 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
       format.fmt.pix.sizeimage = ENCODED_BUFFER_SIZE;
   }
 
-  GST_DEBUG_OBJECT (v4l2object->element, "Desired format is %dx%d, format "
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired format is %dx%d, format "
       "%" GST_FOURCC_FORMAT ", nb planes %d", format.fmt.pix.width,
       format.fmt.pix_mp.height,
       GST_FOURCC_ARGS (format.fmt.pix.pixelformat),
@@ -3414,10 +3416,10 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
 #ifndef GST_DISABLE_GST_DEBUG
   if (is_mplane) {
     for (i = 0; i < format.fmt.pix_mp.num_planes; i++)
-      GST_DEBUG_OBJECT (v4l2object->element, "  stride %d",
+      GST_DEBUG_OBJECT (v4l2object->dbg_obj, "  stride %d",
           format.fmt.pix_mp.plane_fmt[i].bytesperline);
   } else {
-    GST_DEBUG_OBJECT (v4l2object->element, "  stride %d",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "  stride %d",
         format.fmt.pix.bytesperline);
   }
 #endif
@@ -3435,7 +3437,7 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
       format.fmt.pix.xfer_func = transfer;
     }
 
-    GST_DEBUG_OBJECT (v4l2object->element, "Desired colorspace is %d:%d:%d:%d",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired colorspace is %d:%d:%d:%d",
         colorspace, range, matrix, transfer);
   }
 
@@ -3447,7 +3449,7 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
       goto set_fmt_failed;
   }
 
-  GST_DEBUG_OBJECT (v4l2object->element, "Got format of %dx%d, format "
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got format of %dx%d, format "
       "%" GST_FOURCC_FORMAT ", nb planes %d, colorspace %d",
       format.fmt.pix.width, format.fmt.pix_mp.height,
       GST_FOURCC_ARGS (format.fmt.pix.pixelformat),
@@ -3457,11 +3459,11 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
 #ifndef GST_DISABLE_GST_DEBUG
   if (is_mplane) {
     for (i = 0; i < format.fmt.pix_mp.num_planes; i++)
-      GST_DEBUG_OBJECT (v4l2object->element, "  stride %d, sizeimage %d",
+      GST_DEBUG_OBJECT (v4l2object->dbg_obj, "  stride %d, sizeimage %d",
           format.fmt.pix_mp.plane_fmt[i].bytesperline,
           format.fmt.pix_mp.plane_fmt[i].sizeimage);
   } else {
-    GST_DEBUG_OBJECT (v4l2object->element, "  stride %d, sizeimage %d",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "  stride %d, sizeimage %d",
         format.fmt.pix.bytesperline, format.fmt.pix.sizeimage);
   }
 #endif
@@ -3526,12 +3528,12 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
     ctl.value = 0xff;
 
     if (v4l2object->ioctl (fd, VIDIOC_S_CTRL, &ctl) < 0)
-      GST_WARNING_OBJECT (v4l2object->element,
+      GST_WARNING_OBJECT (v4l2object->dbg_obj,
           "Failed to set alpha component value");
   }
 
   /* Is there a reason we require the caller to always specify a framerate? */
-  GST_DEBUG_OBJECT (v4l2object->element, "Desired framerate: %u/%u", fps_n,
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired framerate: %u/%u", fps_n,
       fps_d);
 
   memset (&streamparm, 0x00, sizeof (struct v4l2_streamparm));
@@ -3547,7 +3549,7 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
     GST_VIDEO_INFO_FPS_D (&info) =
         streamparm.parm.capture.timeperframe.numerator;
 
-    GST_DEBUG_OBJECT (v4l2object->element, "Got capture framerate: %u/%u",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got capture framerate: %u/%u",
         streamparm.parm.capture.timeperframe.denominator,
         streamparm.parm.capture.timeperframe.numerator);
 
@@ -3556,12 +3558,12 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
      * causing them to not output data (several models of Thinkpad cameras
      * have this problem at least).
      * So, don't skip. */
-    GST_LOG_OBJECT (v4l2object->element, "Setting capture framerate to %u/%u",
+    GST_LOG_OBJECT (v4l2object->dbg_obj, "Setting capture framerate to %u/%u",
         fps_n, fps_d);
     /* We want to change the frame rate, so check whether we can. Some cheap USB
      * cameras don't have the capability */
     if ((streamparm.parm.capture.capability & V4L2_CAP_TIMEPERFRAME) == 0) {
-      GST_DEBUG_OBJECT (v4l2object->element,
+      GST_DEBUG_OBJECT (v4l2object->dbg_obj,
           "Not setting capture framerate (not supported)");
       goto done;
     }
@@ -3580,11 +3582,11 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
       fps_d = streamparm.parm.capture.timeperframe.numerator;
       fps_n = streamparm.parm.capture.timeperframe.denominator;
 
-      GST_INFO_OBJECT (v4l2object->element, "Set capture framerate to %u/%u",
+      GST_INFO_OBJECT (v4l2object->dbg_obj, "Set capture framerate to %u/%u",
           fps_n, fps_d);
     } else {
       /* fix v4l2 capture driver to provide framerate values */
-      GST_WARNING_OBJECT (v4l2object->element,
+      GST_WARNING_OBJECT (v4l2object->dbg_obj,
           "Reuse caps framerate %u/%u - fix v4l2 capture driver", fps_n, fps_d);
     }
 
@@ -3597,14 +3599,14 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
     GST_VIDEO_INFO_FPS_D (&info) =
         streamparm.parm.output.timeperframe.numerator;
 
-    GST_DEBUG_OBJECT (v4l2object->element, "Got output framerate: %u/%u",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got output framerate: %u/%u",
         streamparm.parm.output.timeperframe.denominator,
         streamparm.parm.output.timeperframe.numerator);
 
-    GST_LOG_OBJECT (v4l2object->element, "Setting output framerate to %u/%u",
+    GST_LOG_OBJECT (v4l2object->dbg_obj, "Setting output framerate to %u/%u",
         fps_n, fps_d);
     if ((streamparm.parm.output.capability & V4L2_CAP_TIMEPERFRAME) == 0) {
-      GST_DEBUG_OBJECT (v4l2object->element,
+      GST_DEBUG_OBJECT (v4l2object->dbg_obj,
           "Not setting output framerate (not supported)");
       goto done;
     }
@@ -3622,11 +3624,11 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
       fps_d = streamparm.parm.output.timeperframe.numerator;
       fps_n = streamparm.parm.output.timeperframe.denominator;
 
-      GST_INFO_OBJECT (v4l2object->element, "Set output framerate to %u/%u",
+      GST_INFO_OBJECT (v4l2object->dbg_obj, "Set output framerate to %u/%u",
           fps_n, fps_d);
     } else {
       /* fix v4l2 output driver to provide framerate values */
-      GST_WARNING_OBJECT (v4l2object->element,
+      GST_WARNING_OBJECT (v4l2object->dbg_obj,
           "Reuse caps framerate %u/%u - fix v4l2 output driver", fps_n, fps_d);
     }
 
@@ -3647,7 +3649,7 @@ done:
   /* ERRORS */
 invalid_caps:
   {
-    GST_DEBUG_OBJECT (v4l2object->element, "can't parse caps %" GST_PTR_FORMAT,
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "can't parse caps %" GST_PTR_FORMAT,
         caps);
     return FALSE;
   }
@@ -3780,7 +3782,7 @@ gboolean
 gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps,
     GstV4l2Error * error)
 {
-  GST_DEBUG_OBJECT (v4l2object->element, "Setting format to %" GST_PTR_FORMAT,
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Setting format to %" GST_PTR_FORMAT,
       caps);
   return gst_v4l2_object_set_format_full (v4l2object, caps, FALSE, error);
 }
@@ -3789,7 +3791,7 @@ gboolean
 gst_v4l2_object_try_format (GstV4l2Object * v4l2object, GstCaps * caps,
     GstV4l2Error * error)
 {
-  GST_DEBUG_OBJECT (v4l2object->element, "Trying format %" GST_PTR_FORMAT,
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Trying format %" GST_PTR_FORMAT,
       caps);
   return gst_v4l2_object_set_format_full (v4l2object, caps, TRUE, error);
 }
@@ -3932,25 +3934,25 @@ gst_v4l2_object_set_crop (GstV4l2Object * obj)
 
   if (obj->align.padding_left + obj->align.padding_top +
       obj->align.padding_right + obj->align.padding_bottom == 0) {
-    GST_DEBUG_OBJECT (obj->element, "no cropping needed");
+    GST_DEBUG_OBJECT (obj->dbg_obj, "no cropping needed");
     return TRUE;
   }
 
-  GST_DEBUG_OBJECT (obj->element,
+  GST_DEBUG_OBJECT (obj->dbg_obj,
       "Desired cropping left %u, top %u, size %ux%u", crop.c.left, crop.c.top,
       crop.c.width, crop.c.height);
 
   if (obj->ioctl (obj->video_fd, VIDIOC_S_CROP, &crop) < 0) {
-    GST_WARNING_OBJECT (obj->element, "VIDIOC_S_CROP failed");
+    GST_WARNING_OBJECT (obj->dbg_obj, "VIDIOC_S_CROP failed");
     return FALSE;
   }
 
   if (obj->ioctl (obj->video_fd, VIDIOC_G_CROP, &crop) < 0) {
-    GST_WARNING_OBJECT (obj->element, "VIDIOC_G_CROP failed");
+    GST_WARNING_OBJECT (obj->dbg_obj, "VIDIOC_G_CROP failed");
     return FALSE;
   }
 
-  GST_DEBUG_OBJECT (obj->element,
+  GST_DEBUG_OBJECT (obj->dbg_obj,
       "Got cropping left %u, top %u, size %ux%u", crop.c.left, crop.c.top,
       crop.c.width, crop.c.height);
 
@@ -3982,7 +3984,7 @@ gst_v4l2_object_unlock (GstV4l2Object * v4l2object)
 {
   gboolean ret = TRUE;
 
-  GST_LOG_OBJECT (v4l2object->element, "start flushing");
+  GST_LOG_OBJECT (v4l2object->dbg_obj, "start flushing");
 
   if (v4l2object->pool && gst_buffer_pool_is_active (v4l2object->pool))
     gst_buffer_pool_set_flushing (v4l2object->pool, TRUE);
@@ -3995,7 +3997,7 @@ gst_v4l2_object_unlock_stop (GstV4l2Object * v4l2object)
 {
   gboolean ret = TRUE;
 
-  GST_LOG_OBJECT (v4l2object->element, "stop flushing");
+  GST_LOG_OBJECT (v4l2object->dbg_obj, "stop flushing");
 
   if (v4l2object->pool && gst_buffer_pool_is_active (v4l2object->pool))
     gst_buffer_pool_set_flushing (v4l2object->pool, FALSE);
@@ -4006,7 +4008,7 @@ gst_v4l2_object_unlock_stop (GstV4l2Object * v4l2object)
 gboolean
 gst_v4l2_object_stop (GstV4l2Object * v4l2object)
 {
-  GST_DEBUG_OBJECT (v4l2object->element, "stopping");
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "stopping");
 
   if (!GST_V4L2_IS_OPEN (v4l2object))
     goto done;
@@ -4014,7 +4016,7 @@ gst_v4l2_object_stop (GstV4l2Object * v4l2object)
     goto done;
 
   if (v4l2object->pool) {
-    GST_DEBUG_OBJECT (v4l2object->element, "deactivating pool");
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "deactivating pool");
     gst_buffer_pool_set_active (v4l2object->pool, FALSE);
     gst_object_unref (v4l2object->pool);
     v4l2object->pool = NULL;
@@ -4045,7 +4047,7 @@ 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->element,
+        GST_WARNING_OBJECT (v4l2object->dbg_obj,
             "Failed to probe pixel aspect ratio with VIDIOC_CROPCAP: %s",
             g_strerror (errno));
     } else {
@@ -4066,7 +4068,7 @@ gst_v4l2_object_probe_caps (GstV4l2Object * v4l2object, GstCaps * filter)
     template = gst_v4l2_object_v4l2fourcc_to_bare_struct (format->pixelformat);
 
     if (!template) {
-      GST_DEBUG_OBJECT (v4l2object->element,
+      GST_DEBUG_OBJECT (v4l2object->dbg_obj,
           "unknown format %" GST_FOURCC_FORMAT,
           GST_FOURCC_ARGS (format->pixelformat));
       continue;
@@ -4103,7 +4105,7 @@ gst_v4l2_object_probe_caps (GstV4l2Object * v4l2object, GstCaps * filter)
     gst_caps_unref (tmp);
   }
 
-  GST_INFO_OBJECT (v4l2object->element, "probed caps: %" GST_PTR_FORMAT, ret);
+  GST_INFO_OBJECT (v4l2object->dbg_obj, "probed caps: %" GST_PTR_FORMAT, ret);
 
   return ret;
 }
@@ -4139,7 +4141,7 @@ gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
   GstAllocator *allocator = NULL;
   GstAllocationParams params = { 0 };
 
-  GST_DEBUG_OBJECT (obj->element, "decide allocation");
+  GST_DEBUG_OBJECT (obj->dbg_obj, "decide allocation");
 
   g_return_val_if_fail (obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
       obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE, FALSE);
@@ -4164,7 +4166,7 @@ gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
     update = FALSE;
   }
 
-  GST_DEBUG_OBJECT (obj->element, "allocation: size:%u min:%u max:%u pool:%"
+  GST_DEBUG_OBJECT (obj->dbg_obj, "allocation: size:%u min:%u max:%u pool:%"
       GST_PTR_FORMAT, size, min, max, pool);
 
   has_video_meta =
@@ -4183,7 +4185,7 @@ gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
       if (pool) {
         /* in READ/WRITE mode, prefer a downstream pool because our own pool
          * doesn't help much, we have to write to it as well */
-        GST_DEBUG_OBJECT (obj->element,
+        GST_DEBUG_OBJECT (obj->dbg_obj,
             "read/write mode: using downstream pool");
         /* use the bigest size, when we use our own pool we can't really do any
          * other size than what the hardware gives us but for downstream pools
@@ -4191,7 +4193,7 @@ gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
         size = MAX (size, obj->info.size);
       } else if (can_share_own_pool) {
         /* no downstream pool, use our own then */
-        GST_DEBUG_OBJECT (obj->element,
+        GST_DEBUG_OBJECT (obj->dbg_obj,
             "read/write mode: no downstream pool, using our own");
         pool = gst_object_ref (obj->pool);
         size = obj->info.size;
@@ -4222,22 +4224,22 @@ gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
           gst_object_unref (pool);
         pool = gst_object_ref (obj->pool);
         size = obj->info.size;
-        GST_DEBUG_OBJECT (obj->element,
+        GST_DEBUG_OBJECT (obj->dbg_obj,
             "streaming mode: using our own pool %" GST_PTR_FORMAT, pool);
         pushing_from_our_pool = TRUE;
       } else if (pool) {
-        GST_DEBUG_OBJECT (obj->element,
+        GST_DEBUG_OBJECT (obj->dbg_obj,
             "streaming mode: copying to downstream pool %" GST_PTR_FORMAT,
             pool);
       } else {
-        GST_DEBUG_OBJECT (obj->element,
+        GST_DEBUG_OBJECT (obj->dbg_obj,
             "streaming mode: no usable pool, copying to generic pool");
         size = MAX (size, obj->info.size);
       }
       break;
     case GST_V4L2_IO_AUTO:
     default:
-      GST_WARNING_OBJECT (obj->element, "unhandled mode");
+      GST_WARNING_OBJECT (obj->dbg_obj, "unhandled mode");
       break;
   }
 
@@ -4290,7 +4292,7 @@ gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
   config = gst_buffer_pool_get_config (obj->pool);
 
   if (obj->need_video_meta || has_video_meta) {
-    GST_DEBUG_OBJECT (obj->element, "activate Video Meta");
+    GST_DEBUG_OBJECT (obj->dbg_obj, "activate Video Meta");
     gst_buffer_pool_config_add_option (config,
         GST_BUFFER_POOL_OPTION_VIDEO_META);
   }
@@ -4298,14 +4300,14 @@ gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
   gst_buffer_pool_config_set_allocator (config, allocator, &params);
   gst_buffer_pool_config_set_params (config, caps, size, own_min, 0);
 
-  GST_DEBUG_OBJECT (obj->element, "setting own pool config to %"
+  GST_DEBUG_OBJECT (obj->dbg_obj, "setting own pool config to %"
       GST_PTR_FORMAT, config);
 
   /* Our pool often need to adjust the value */
   if (!gst_buffer_pool_set_config (obj->pool, config)) {
     config = gst_buffer_pool_get_config (obj->pool);
 
-    GST_DEBUG_OBJECT (obj->element, "own pool config changed to %"
+    GST_DEBUG_OBJECT (obj->dbg_obj, "own pool config changed to %"
         GST_PTR_FORMAT, config);
 
     /* our pool will adjust the maximum buffer, which we are fine with */
@@ -4322,12 +4324,12 @@ gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
     gst_buffer_pool_config_set_allocator (config, allocator, &params);
     gst_buffer_pool_config_set_params (config, caps, size, min, max);
 
-    GST_DEBUG_OBJECT (obj->element, "setting other pool config to %"
+    GST_DEBUG_OBJECT (obj->dbg_obj, "setting other pool config to %"
         GST_PTR_FORMAT, config);
 
     /* if downstream supports video metadata, add this to the pool config */
     if (has_video_meta) {
-      GST_DEBUG_OBJECT (obj->element, "activate Video Meta");
+      GST_DEBUG_OBJECT (obj->dbg_obj, "activate Video Meta");
       gst_buffer_pool_config_add_option (config,
           GST_BUFFER_POOL_OPTION_VIDEO_META);
     }
@@ -4432,7 +4434,7 @@ gst_v4l2_object_propose_allocation (GstV4l2Object * obj, GstQuery * query)
     config = gst_buffer_pool_get_config (pool);
     gst_buffer_pool_config_get_params (config, &pcaps, NULL, NULL, NULL);
 
-    GST_DEBUG_OBJECT (obj->element,
+    GST_DEBUG_OBJECT (obj->dbg_obj,
         "we had a pool with caps %" GST_PTR_FORMAT, pcaps);
     if (!gst_caps_is_equal (caps, pcaps)) {
       gst_structure_free (config);
@@ -4458,13 +4460,13 @@ gst_v4l2_object_propose_allocation (GstV4l2Object * obj, GstQuery * query)
   /* ERRORS */
 no_caps:
   {
-    GST_DEBUG_OBJECT (obj->element, "no caps specified");
+    GST_DEBUG_OBJECT (obj->dbg_obj, "no caps specified");
     return FALSE;
   }
 different_caps:
   {
     /* different caps, we can't use this pool */
-    GST_DEBUG_OBJECT (obj->element, "pool has different caps");
+    GST_DEBUG_OBJECT (obj->dbg_obj, "pool has different caps");
     return FALSE;
   }
 }
diff --git a/sys/v4l2/gstv4l2object.h b/sys/v4l2/gstv4l2object.h
index 7f46f8d..73ba624 100644
--- a/sys/v4l2/gstv4l2object.h
+++ b/sys/v4l2/gstv4l2object.h
@@ -111,6 +111,7 @@ typedef gboolean  (*GstV4l2UpdateFpsFunction) (GstV4l2Object * v4l2object);
 
 struct _GstV4l2Object {
   GstElement * element;
+  GstObject * dbg_obj;
 
   enum v4l2_buf_type type;   /* V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_BUF_TYPE_VIDEO_OUTPUT */
 
@@ -234,6 +235,7 @@ GType gst_v4l2_object_get_type (void);
 
 /* create/destroy */
 GstV4l2Object*  gst_v4l2_object_new       (GstElement * element,
+                                           GstObject * dbg_obj,
                                            enum v4l2_buf_type  type,
                                            const char * default_device,
                                            GstV4l2GetInOutFunction get_in_out_func,
diff --git a/sys/v4l2/gstv4l2radio.c b/sys/v4l2/gstv4l2radio.c
index 4e1aec3..6bfbefb 100644
--- a/sys/v4l2/gstv4l2radio.c
+++ b/sys/v4l2/gstv4l2radio.c
@@ -326,7 +326,7 @@ static void
 gst_v4l2radio_init (GstV4l2Radio * filter)
 {
   filter->v4l2object = gst_v4l2_object_new (GST_ELEMENT (filter),
-      V4L2_BUF_TYPE_VIDEO_CAPTURE, DEFAULT_PROP_DEVICE,
+      GST_OBJECT (filter), V4L2_BUF_TYPE_VIDEO_CAPTURE, DEFAULT_PROP_DEVICE,
       gst_v4l2radio_get_input, gst_v4l2radio_set_input, NULL);
 
   filter->v4l2object->frequency = DEFAULT_FREQUENCY;
diff --git a/sys/v4l2/gstv4l2sink.c b/sys/v4l2/gstv4l2sink.c
index c77227c..8739218 100644
--- a/sys/v4l2/gstv4l2sink.c
+++ b/sys/v4l2/gstv4l2sink.c
@@ -202,8 +202,8 @@ static void
 gst_v4l2sink_init (GstV4l2Sink * v4l2sink)
 {
   v4l2sink->v4l2object = gst_v4l2_object_new (GST_ELEMENT (v4l2sink),
-      V4L2_BUF_TYPE_VIDEO_OUTPUT, DEFAULT_PROP_DEVICE,
-      gst_v4l2_get_output, gst_v4l2_set_output, NULL);
+      GST_OBJECT (GST_BASE_SINK_PAD (v4l2sink)), V4L2_BUF_TYPE_VIDEO_OUTPUT,
+      DEFAULT_PROP_DEVICE, gst_v4l2_get_output, gst_v4l2_set_output, NULL);
 
   /* same default value for video output device as is used for
    * v4l2src/capture is no good..  so lets set a saner default
diff --git a/sys/v4l2/gstv4l2src.c b/sys/v4l2/gstv4l2src.c
index 9ed8784..93c9053 100644
--- a/sys/v4l2/gstv4l2src.c
+++ b/sys/v4l2/gstv4l2src.c
@@ -199,8 +199,8 @@ gst_v4l2src_init (GstV4l2Src * v4l2src)
 {
   /* fixme: give an update_fps_function */
   v4l2src->v4l2object = gst_v4l2_object_new (GST_ELEMENT (v4l2src),
-      V4L2_BUF_TYPE_VIDEO_CAPTURE, DEFAULT_PROP_DEVICE,
-      gst_v4l2_get_input, gst_v4l2_set_input, NULL);
+      GST_OBJECT (GST_BASE_SRC_PAD (v4l2src)), V4L2_BUF_TYPE_VIDEO_CAPTURE,
+      DEFAULT_PROP_DEVICE, gst_v4l2_get_input, gst_v4l2_set_input, NULL);
 
   /* Avoid the slow probes */
   v4l2src->v4l2object->skip_try_fmt_probes = TRUE;
diff --git a/sys/v4l2/gstv4l2transform.c b/sys/v4l2/gstv4l2transform.c
index 0c29f91..33052a8 100644
--- a/sys/v4l2/gstv4l2transform.c
+++ b/sys/v4l2/gstv4l2transform.c
@@ -1069,12 +1069,14 @@ gst_v4l2_transform_subinstance_init (GTypeInstance * instance, gpointer g_class)
   GstV4l2Transform *self = GST_V4L2_TRANSFORM (instance);
 
   self->v4l2output = gst_v4l2_object_new (GST_ELEMENT (self),
+      GST_OBJECT (GST_BASE_TRANSFORM_SINK_PAD (self)),
       V4L2_BUF_TYPE_VIDEO_OUTPUT, klass->default_device,
       gst_v4l2_get_output, gst_v4l2_set_output, NULL);
   self->v4l2output->no_initial_format = TRUE;
   self->v4l2output->keep_aspect = FALSE;
 
   self->v4l2capture = gst_v4l2_object_new (GST_ELEMENT (self),
+      GST_OBJECT (GST_BASE_TRANSFORM_SRC_PAD (self)),
       V4L2_BUF_TYPE_VIDEO_CAPTURE, klass->default_device,
       gst_v4l2_get_input, gst_v4l2_set_input, NULL);
   self->v4l2capture->no_initial_format = TRUE;
diff --git a/sys/v4l2/gstv4l2videodec.c b/sys/v4l2/gstv4l2videodec.c
index 64037cb..c7c795b 100644
--- a/sys/v4l2/gstv4l2videodec.c
+++ b/sys/v4l2/gstv4l2videodec.c
@@ -906,12 +906,14 @@ gst_v4l2_video_dec_subinstance_init (GTypeInstance * instance, gpointer g_class)
   gst_video_decoder_set_packetized (decoder, TRUE);
 
   self->v4l2output = gst_v4l2_object_new (GST_ELEMENT (self),
+      GST_OBJECT (GST_VIDEO_DECODER_SINK_PAD (self)),
       V4L2_BUF_TYPE_VIDEO_OUTPUT, klass->default_device,
       gst_v4l2_get_output, gst_v4l2_set_output, NULL);
   self->v4l2output->no_initial_format = TRUE;
   self->v4l2output->keep_aspect = FALSE;
 
   self->v4l2capture = gst_v4l2_object_new (GST_ELEMENT (self),
+      GST_OBJECT (GST_VIDEO_DECODER_SRC_PAD (self)),
       V4L2_BUF_TYPE_VIDEO_CAPTURE, klass->default_device,
       gst_v4l2_get_input, gst_v4l2_set_input, NULL);
   self->v4l2capture->no_initial_format = TRUE;
diff --git a/sys/v4l2/gstv4l2videoenc.c b/sys/v4l2/gstv4l2videoenc.c
index f1d3087..8e914f6 100644
--- a/sys/v4l2/gstv4l2videoenc.c
+++ b/sys/v4l2/gstv4l2videoenc.c
@@ -1035,12 +1035,14 @@ gst_v4l2_video_enc_subinstance_init (GTypeInstance * instance, gpointer g_class)
   GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (instance);
 
   self->v4l2output = gst_v4l2_object_new (GST_ELEMENT (self),
+      GST_OBJECT (GST_VIDEO_ENCODER_SINK_PAD (self)),
       V4L2_BUF_TYPE_VIDEO_OUTPUT, klass->default_device,
       gst_v4l2_get_output, gst_v4l2_set_output, NULL);
   self->v4l2output->no_initial_format = TRUE;
   self->v4l2output->keep_aspect = FALSE;
 
   self->v4l2capture = gst_v4l2_object_new (GST_ELEMENT (self),
+      GST_OBJECT (GST_VIDEO_ENCODER_SRC_PAD (self)),
       V4L2_BUF_TYPE_VIDEO_CAPTURE, klass->default_device,
       gst_v4l2_get_input, gst_v4l2_set_input, NULL);
   self->v4l2capture->no_initial_format = TRUE;
diff --git a/sys/v4l2/v4l2_calls.c b/sys/v4l2/v4l2_calls.c
index f52bd99..12fc821 100644
--- a/sys/v4l2/v4l2_calls.c
+++ b/sys/v4l2/v4l2_calls.c
@@ -251,7 +251,7 @@ gst_v4l2_fill_lists (GstV4l2Object * v4l2object)
         standard.frameperiod.denominator, standard.frameperiod.numerator);
     v4l2norm->index = standard.id;
 
-    GST_DEBUG_OBJECT (v4l2object->element, "index=%08x, label=%s",
+    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "index=%08x, label=%s",
         (unsigned int) v4l2norm->index, norm->label);
 
     v4l2object->norms = g_list_prepend (v4l2object->norms, (gpointer) norm);
@@ -461,7 +461,7 @@ gst_v4l2_fill_lists (GstV4l2Object * v4l2object)
 static void
 gst_v4l2_empty_lists (GstV4l2Object * v4l2object)
 {
-  GST_DEBUG_OBJECT (v4l2object->element, "deleting enumerations");
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "deleting enumerations");
 
   g_list_foreach (v4l2object->channels, (GFunc) g_object_unref, NULL);
   g_list_free (v4l2object->channels);
@@ -520,7 +520,7 @@ gst_v4l2_open (GstV4l2Object * v4l2object)
   struct stat st;
   int libv4l2_fd = -1;
 
-  GST_DEBUG_OBJECT (v4l2object->element, "Trying to open device %s",
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Trying to open device %s",
       v4l2object->videodev);
 
   GST_V4L2_CHECK_NOT_OPEN (v4l2object);
@@ -591,7 +591,7 @@ gst_v4l2_open (GstV4l2Object * v4l2object)
   if (!gst_v4l2_fill_lists (v4l2object))
     goto error;
 
-  GST_INFO_OBJECT (v4l2object->element,
+  GST_INFO_OBJECT (v4l2object->dbg_obj,
       "Opened device '%s' (%s) successfully",
       v4l2object->vcap.card, v4l2object->videodev);
 
@@ -671,7 +671,7 @@ error:
 gboolean
 gst_v4l2_dup (GstV4l2Object * v4l2object, GstV4l2Object * other)
 {
-  GST_DEBUG_OBJECT (v4l2object->element, "Trying to dup device %s",
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Trying to dup device %s",
       other->videodev);
 
   GST_V4L2_CHECK_OPEN (other);
@@ -690,7 +690,7 @@ gst_v4l2_dup (GstV4l2Object * v4l2object, GstV4l2Object * other)
   g_free (v4l2object->videodev);
   v4l2object->videodev = g_strdup (other->videodev);
 
-  GST_INFO_OBJECT (v4l2object->element,
+  GST_INFO_OBJECT (v4l2object->dbg_obj,
       "Cloned device '%s' (%s) successfully",
       v4l2object->vcap.card, v4l2object->videodev);
 
@@ -717,7 +717,7 @@ not_open:
 gboolean
 gst_v4l2_close (GstV4l2Object * v4l2object)
 {
-  GST_DEBUG_OBJECT (v4l2object->element, "Trying to close %s",
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Trying to close %s",
       v4l2object->videodev);
 
   GST_V4L2_CHECK_OPEN (v4l2object);
@@ -742,7 +742,7 @@ gst_v4l2_close (GstV4l2Object * v4l2object)
 gboolean
 gst_v4l2_get_norm (GstV4l2Object * v4l2object, v4l2_std_id * norm)
 {
-  GST_DEBUG_OBJECT (v4l2object->element, "getting norm");
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "getting norm");
 
   if (!GST_V4L2_IS_OPEN (v4l2object))
     return FALSE;
@@ -770,7 +770,7 @@ std_failed:
 gboolean
 gst_v4l2_set_norm (GstV4l2Object * v4l2object, v4l2_std_id norm)
 {
-  GST_DEBUG_OBJECT (v4l2object->element, "trying to set norm to "
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to set norm to "
       "%" G_GINT64_MODIFIER "x", (guint64) norm);
 
   if (!GST_V4L2_IS_OPEN (v4l2object))
@@ -804,7 +804,7 @@ gst_v4l2_get_frequency (GstV4l2Object * v4l2object,
 
   GstTunerChannel *channel;
 
-  GST_DEBUG_OBJECT (v4l2object->element, "getting current tuner frequency");
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "getting current tuner frequency");
 
   if (!GST_V4L2_IS_OPEN (v4l2object))
     return FALSE;
@@ -843,7 +843,7 @@ gst_v4l2_set_frequency (GstV4l2Object * v4l2object,
 
   GstTunerChannel *channel;
 
-  GST_DEBUG_OBJECT (v4l2object->element,
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj,
       "setting current tuner frequency to %lu", frequency);
 
   if (!GST_V4L2_IS_OPEN (v4l2object))
@@ -882,7 +882,7 @@ gst_v4l2_signal_strength (GstV4l2Object * v4l2object,
 {
   struct v4l2_tuner tuner = { 0, };
 
-  GST_DEBUG_OBJECT (v4l2object->element, "trying to get signal strength");
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to get signal strength");
 
   if (!GST_V4L2_IS_OPEN (v4l2object))
     return FALSE;
@@ -916,7 +916,7 @@ gst_v4l2_get_attribute (GstV4l2Object * v4l2object,
 {
   struct v4l2_control control = { 0, };
 
-  GST_DEBUG_OBJECT (v4l2object->element, "getting value of attribute %d",
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "getting value of attribute %d",
       attribute_num);
 
   if (!GST_V4L2_IS_OPEN (v4l2object))
@@ -953,7 +953,7 @@ gst_v4l2_set_attribute (GstV4l2Object * v4l2object,
 {
   struct v4l2_control control = { 0, };
 
-  GST_DEBUG_OBJECT (v4l2object->element, "setting value of attribute %d to %d",
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "setting value of attribute %d to %d",
       attribute_num, value);
 
   if (!GST_V4L2_IS_OPEN (v4l2object))
@@ -1029,7 +1029,7 @@ gst_v4l2_get_input (GstV4l2Object * v4l2object, gint * input)
 {
   gint n;
 
-  GST_DEBUG_OBJECT (v4l2object->element, "trying to get input");
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to get input");
 
   if (!GST_V4L2_IS_OPEN (v4l2object))
     return FALSE;
@@ -1039,7 +1039,7 @@ gst_v4l2_get_input (GstV4l2Object * v4l2object, gint * input)
 
   *input = n;
 
-  GST_DEBUG_OBJECT (v4l2object->element, "input: %d", n);
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "input: %d", n);
 
   return TRUE;
 
@@ -1058,7 +1058,7 @@ input_failed:
 gboolean
 gst_v4l2_set_input (GstV4l2Object * v4l2object, gint input)
 {
-  GST_DEBUG_OBJECT (v4l2object->element, "trying to set input to %d", input);
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to set input to %d", input);
 
   if (!GST_V4L2_IS_OPEN (v4l2object))
     return FALSE;
@@ -1086,7 +1086,7 @@ gst_v4l2_get_output (GstV4l2Object * v4l2object, gint * output)
 {
   gint n;
 
-  GST_DEBUG_OBJECT (v4l2object->element, "trying to get output");
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to get output");
 
   if (!GST_V4L2_IS_OPEN (v4l2object))
     return FALSE;
@@ -1096,7 +1096,7 @@ gst_v4l2_get_output (GstV4l2Object * v4l2object, gint * output)
 
   *output = n;
 
-  GST_DEBUG_OBJECT (v4l2object->element, "output: %d", n);
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "output: %d", n);
 
   return TRUE;
 
@@ -1115,7 +1115,7 @@ output_failed:
 gboolean
 gst_v4l2_set_output (GstV4l2Object * v4l2object, gint output)
 {
-  GST_DEBUG_OBJECT (v4l2object->element, "trying to set output to %d", output);
+  GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to set output to %d", output);
 
   if (!GST_V4L2_IS_OPEN (v4l2object))
     return FALSE;
-- 
2.7.4