[meta-freescale] Fwd: gst1.0-fsl-plugin/4.0.2/4.0.3-r0: bug with reconfigure events

[Andrew Murray]

Hello,

I have created a very simple gst1.0 application based on
input-selector-test.c example, modified such that the pipeline looks
like this:

imxv4l2src ! caps ! valve ! imxv4l2sink

The application changes the state of the valve from drop=false to
drop=true after a specified number of seconds. Unfortunately this
results in the following error:

** Message: Valve is now set to drop
0:00:12.083723335   712   0x3ff260 ERROR             imxv4l2src
gst1.0-fsl-plugin/4.0.2-r0/gst1.0-fsl-plugins-4.0.2/plugins/v4l2/gstimxv4l2src.c:463:gst_imx_v4l2src_decide_allocation:<src1>
using v4l2 source allocator.
0:00:12.487820001   712   0x3ff260 ERROR                imxv4l2
gst1.0-fsl-plugin/4.0.2-r0/gst1.0-fsl-plugins-4.0.2/libs/v4l2_core/gstimxv4l2.c:1429:gst_imx_v4l2_allocate_buffer:
No more v4l2 buffer for allocating.
0:00:12.488049335   712   0x3ff260 ERROR                imxv4l2
gst1.0-fsl-plugin/4.0.2-r0/gst1.0-fsl-plugins-4.0.2/libs/v4l2_core/gstimxv4l2.c:1429:gst_imx_v4l2_allocate_buffer:
No more v4l2 buffer for allocating.
0:00:12.492420668   712   0x3ff260 ERROR                imxv4l2
gst1.0-fsl-plugin/4.0.2-r0/gst1.0-fsl-plugins-4.0.2/libs/v4l2_core/gstimxv4l2.c:1398:gst_imx_v4l2_find_buffer:
Can't find the buffer 0x766EF508.
0:00:12.492524001   712   0x3ff260 ERROR             imxv4l2src
/gst1.0-fsl-plugin/4.0.2-r0/gst1.0-fsl-plugins-4.0.2/plugins/v4l2/gstimxv4l2src.c:586:gst_imx_v4l2src_acquire_buffer:<src1>
Queue buffer 0x75c09db8 failed.
0:00:12.492610335   712   0x3ff260 WARN                 basesrc
gstreamer1.0/1.4.1-r0/gstreamer-1.4.1/libs/gst/base/gstbasesrc.c:2933:gst_base_src_loop:<src1>
error: Internal data flow error.
0:00:12.492679335   712   0x3ff260 WARN                 basesrc
gstreamer1.0/1.4.1-r0/gstreamer-1.4.1/libs/gst/base/gstbasesrc.c:2933:gst_base_src_loop:<src1>
error: streaming task paused, reason error (-5)
Got error message
Error: Internal data flow error.

(video:712): GStreamer-CRITICAL **: gst_mini_object_unref: assertion
'mini_object->refcount > 0' failed
0:00:12.493453335   712   0x400ee0 ERROR                imxv4l2
gst1.0-fsl-plugin/4.0.2-r0/gst1.0-fsl-plugins-4.0.2/libs/v4
l2_core/gstimxv4l2.c:1398:gst_imx_v4l2_find_buffer: Can't find the
buffer 0x00000000.


Using gst1.0-fsl-plugin/4.0.3-r0 also results in this similar error:

** Message: Valve is now set to drop
0:00:12.386593002   750  0x1eb8460 ERROR                imxv4l2
gst1.0-fsl-plugin/4.0.3-r0/gst1.0-fsl-plugins-4.0.3/libs/v4l2_core/gstimxv4l2.c:1452:gst_imx_v4l2_allocate_buffer:
No more v4l2 buffer for allocating.
0:00:12.386899668   750  0x1eb8460 ERROR                imxv4l2
gst1.0-fsl-plugin/4.0.3-r0/gst1.0-fsl-plugins-4.0.3/libs/v4l2_core/gstimxv4l2.c:1452:gst_imx_v4l2_allocate_buffer:
No more v4l2 buffer for allocating.
0:00:12.387092668   750  0x1eb8460 ERROR                imxv4l2 ERROR:
v4l2 capture: VIDIOC_QBUF: buffer already
queuedgst1.0-fsl-plugin/4.0.3-r0/gst1.0-fsl-plugins-4.0.3/libs/v4l2_core/gstimxv4l2.c:1452:gst_imx_v4l2_allocate_buffer:
No more v4l2 buffer for allocating.
0:00:12.387223335   750  0x1eb8460 ERROR                imxv4l2
gst1.0-fsl-plugin/4.0.3-r0/gst1.0-fsl-plugins-4.0.3/libs/v4l2_core/gstimxv4l2.c:1452:gst_imx_v4l2_allocate_buffer:
No more v4l2 buffer for allocating.
0:00:12.455394002   750  0x1eb8460 WARN                 imxv4l2
gst1.0-fsl-plugin/4.0.3-r0/gst1.0-fsl-plugins-4.0.3/libs/v4l2_core/gstimxv4l2.c:1686:gst_imx_v4l2_queue_gstbuffer:
new buffer (0x75c09e58) use the same memblk(0x75004a64) with queued
buffer(0x75c09958)
0:00:12.455493668   750  0x1eb8460 WARN                 imxv4l2
gst1.0-fsl-plugin/4.0.3-r0/gst1.0-fsl-plugins-4.0.3/libs/v4l2_core/gstimxv4l2.c:1689:gst_imx_v4l2_queue_gstbuffer:
gstbuffer(0x75c09958) for (0x7696c750) not dequeued yet but queued
again, index(1975556440).
0:00:12.461249002   750  0x1eb8460 ERROR                imxv4l2
gst1.0-fsl-plugin/4.0.3-r0/gst1.0-fsl-plugins-4.0.3/libs/v4l2_core/gstimxv4l2.c:1571:imx_v4l2_do_queue_buffer:
queue v4l2 buffer failed.
0:00:12.461293335   750  0x1eb8460 ERROR                imxv4l2
gst1.0-fsl-plugin/4.0.3-r0/gst1.0-fsl-plugins-4.0.3/libs/v4l2_core/gstimxv4l2.c:1693:gst_imx_v4l2_queue_gstbuffer:
queue gstbuffer (0x75c09e58) failed.

(video:750): GStreamer-CRITICAL **: gst_buffer_get_meta: assertion
'buffer != NULL' failed
(video:750): GStreamer-CRITICAL **: gst_buffer_add_meta: assertion
'buffer != NULL' failed


I believe the change in 'drop' state results in a reconfigure event
reaching imxv4l2src which it doesn't appear to handle correctly.
Replacing imxv4l2src with videotestsrc results in the expected
behaviour when the valve is set to drop.

Furthermore, when modifying gstimxv4l2src.c to override the default
GST_EVENT_RECONFIGURE event such that it only clears the event
(gst_pad_check_reconfigure) in then working as expected.

This appears to be a bug - has this been seen before or already fixed?
Are there any suggestions for the correct way of fixing this?

Thanks,

Andrew Murray
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