gstreamer 1.20: v4l2bufferpool spams "newly allocated buffer is not free"

[Michiel Konstapel]

On 04-07-2022 01:48, Nicolas Dufresne wrote:
>
>
> Le ven. 1 juill. 2022, 15 h 09, Michiel Konstapel 
> <michiel at aanmelder.nl> a écrit :
>
>
>     On 30-06-2022 18:04, Nicolas Dufresne via gstreamer-devel wrote:
>     >
>     >>
>     >> I'd be curious to see the value or
>     &pool->buffer_state[group->buffer.index] when
>     >> that warning triggers. I fail to see how we actually endup in
>     that situation. I
>     >> wonder if there is a relation with:
>     >>
>     >> https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1087
>     >>
>     >> And associated merge request. Did you already tried ?
>     >>
>     >>
>     https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2007
>
>
>     I've changed the logging to
>
>     GST_WARNING_OBJECT (pool, "newly allocated buffer %u is not free: %x",
>                group->buffer.index,
>     &pool->buffer_state[group->buffer.index]);
>
>     and this prints
>
>     gstv4l2bufferpool.c:477:gst_v4l2_buffer_pool_alloc_buffer:<v4l2src0:pool0:src>
>
>     newly allocated buffer 0 is not free: 32b48
>     v4l2bufferpool
>     gstv4l2bufferpool.c:477:gst_v4l2_buffer_pool_alloc_buffer:<v4l2src0:pool0:src>
>
>     newly allocated buffer 1 is not free: 32b4c
>     v4l2bufferpool
>     gstv4l2bufferpool.c:477:gst_v4l2_buffer_pool_alloc_buffer:<v4l2src0:pool0:src>
>
>     newly allocated buffer 2 is not free: 32b50
>     v4l2bufferpool
>     gstv4l2bufferpool.c:477:gst_v4l2_buffer_pool_alloc_buffer:<v4l2src0:pool0:src>
>
>     newly allocated buffer 3 is not free: 32b54
>
>     That seems... incorrect. A gint is just an int, so %x is correct,
>     right?
>     This has a lot more bits set than are defined in the
>     _GstV4l2BufferState
>     enum.
>
>
> I think the & should not be there.
>
>
Ah, of course, my bad. My C is rather rusty :) After fixing that it just 
prints 1, so indeed the BUFFER_STATE_OUTSTANDING bit is set.

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