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vaapidecodebin: capsfilter to optimize negotiation

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Add a capsfilter forcing the caps
"video/x-raw(memory:VASurface), format=(string)NV12" between the
queue and the vaapipostproc so no renegotiation is required.

https://bugzilla.gnome.org/show_bug.cgi?id=776175
This commit is contained in:
Víctor Manuel Jáquez Leal 2016-12-14 15:51:01 +01:00
parent a66c2d44bf
commit a36b9b27e5
1 changed files with 30 additions and 5 deletions
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35
gst/vaapi/gstvaapidecodebin.c
View file

@ -292,7 +292,9 @@ gst_vaapi_decode_bin_class_init (GstVaapiDecodeBinClass * klass)
static gboolean
gst_vaapi_decode_bin_configure (GstVaapiDecodeBin * vaapidecbin)
{
GstPad *queue_srcpad, *bin_srcpad, *vpp_sinkpad, *vpp_srcpad;
GstElement *capsfilter;
GstCaps *caps;
GstPad *queue_srcpad, *bin_srcpad, *capsfilter_sinkpad, *vpp_srcpad;
gboolean res;
g_object_set (G_OBJECT (vaapidecbin->queue),
@ -305,6 +307,15 @@ gst_vaapi_decode_bin_configure (GstVaapiDecodeBin * vaapidecbin)
GST_INFO_OBJECT (vaapidecbin, "enabling VPP");
/* capsfilter to avoid negotiation with vaapidecode */
caps = gst_caps_from_string
("video/x-raw(memory:VASurface), format=(string)NV12");
if (!caps)
goto error_cannot_set_caps;
capsfilter = gst_element_factory_make ("capsfilter", NULL);
g_object_set (capsfilter, "caps", caps, NULL);
gst_caps_unref (caps);
/* create the postproc */
vaapidecbin->postproc = gst_element_factory_make ("vaapipostproc", NULL);
if (!vaapidecbin->postproc)
@ -312,7 +323,14 @@ gst_vaapi_decode_bin_configure (GstVaapiDecodeBin * vaapidecbin)
g_object_set (G_OBJECT (vaapidecbin->postproc), "deinterlace-method",
vaapidecbin->deinterlace_method, NULL);
gst_bin_add (GST_BIN (vaapidecbin), vaapidecbin->postproc);
gst_bin_add_many (GST_BIN (vaapidecbin), capsfilter, vaapidecbin->postproc,
NULL);
if (!gst_element_link (capsfilter, vaapidecbin->postproc))
goto error_sync_state;
if (!gst_element_sync_state_with_parent (capsfilter))
goto error_sync_state;
if (!gst_element_sync_state_with_parent (vaapidecbin->postproc))
goto error_sync_state;
@ -324,9 +342,9 @@ gst_vaapi_decode_bin_configure (GstVaapiDecodeBin * vaapidecbin)
/* link decoder and queue */
queue_srcpad = gst_element_get_static_pad (vaapidecbin->queue, "src");
vpp_sinkpad = gst_element_get_static_pad (vaapidecbin->postproc, "sink");
res = (gst_pad_link (queue_srcpad, vpp_sinkpad) == GST_PAD_LINK_OK);
gst_object_unref (vpp_sinkpad);
capsfilter_sinkpad = gst_element_get_static_pad (capsfilter, "sink");
res = (gst_pad_link (queue_srcpad, capsfilter_sinkpad) == GST_PAD_LINK_OK);
gst_object_unref (capsfilter_sinkpad);
gst_object_unref (queue_srcpad);
if (!res)
goto error_link_pad;
@ -342,6 +360,13 @@ gst_vaapi_decode_bin_configure (GstVaapiDecodeBin * vaapidecbin)
return TRUE;
/* ERRORS */
error_cannot_set_caps:
{
GST_ELEMENT_ERROR (vaapidecbin, CORE, PAD,
("Failed to configure caps for VA Surfaces."), (NULL));
return FALSE;
}
error_vpp_missing:
{
post_missing_element_message (vaapidecbin, "vaapipostproc");