vaapidecodebin: add postprocessor dynamically

The former approach to left the bin unfinished has some problems: the context
cannot be shared because the vaapidecode is unlinked in many cases, leading to
creating a VADisplay twice.

Initially the bin is fully functional, constructed as

(-----------------------------------)
|            vaapidecodebin         |
|   (-------------)    (-------)    |
|<--| vaapidecode |--->| queue |--->|
|   (-------------)    (-------)    |
(-----------------------------------)

When the context is shared and the VADisplay has VPP capabilities, before
changing to READY state, the bin is reconfigured dynamically, adding the
vaapipostproc element afeter the queue:

(--------------------------------------------------------)
|                       vaapidecodebin                   |
|   (-------------)    (-------)    (---------------)    |
|<--| vaapidecode |--->| queue |--->| vaapipostproc |--->|
|   (-------------)    (-------)    (---------------)    |
(--------------------------------------------------------)

Signed-off-by: Víctor Manuel Jáquez Leal <victorx.jaquez@intel.com>

https://bugzilla.gnome.org/show_bug.cgi?id=757957

1 files changed, 0 insertions, 2 deletions

diff --git a/gst/vaapi/gstvaapidecodebin.h b/gst/vaapi/gstvaapidecodebin.h
index 18685fe7..81804b99 100644
--- a/gst/vaapi/gstvaapidecodebin.h
+++ b/gst/vaapi/gstvaapidecodebin.h
@@ -47,8 +47,6 @@ typedef struct _GstVaapiDecodeBin {
   GstElement *queue;
   GstElement *postproc;
 
-  GstPad *ghost_pad_src;
-
   /* properties */
   guint   max_size_buffers;
   guint   max_size_bytes;