vaapipostproc: don't set caps change at first set

When the source caps change, the filter is destroyed and recreated.
Nonetheless, this happens every time the vaapipostproc starts, since the caps
change detection algorithm does not take in consideration when the caps are
set by first time.

This patch intents to be an optimization, to avoid a useless filter
destroy-creation cycle when the sources caps are set for first time.

The new helper function video_info_update() is a refactorization to avoid
duplicated code.

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

https://bugzilla.gnome.org/show_bug.cgi?id=758007

1 files changed, 29 insertions, 10 deletions

diff --git a/gst/vaapi/gstvaapipostproc.c b/gst/vaapi/gstvaapipostproc.c
index 18f3474b..982b69e8 100644
--- a/gst/vaapi/gstvaapipostproc.c
+++ b/gst/vaapi/gstvaapipostproc.c
@@ -855,6 +855,32 @@ video_info_changed (GstVideoInfo * old_vip, GstVideoInfo * new_vip)
   return FALSE;
 }
 
+static inline gboolean
+video_info_is_filled (GstVideoInfo * info)
+{
+  return (GST_VIDEO_INFO_FORMAT (info) > GST_VIDEO_FORMAT_UNKNOWN
+          && GST_VIDEO_INFO_WIDTH (info) > 0
+          && GST_VIDEO_INFO_HEIGHT (info) > 0);
+}
+
+static gboolean
+video_info_update (GstCaps * caps, GstVideoInfo * info,
+    gboolean * caps_changed_ptr)
+{
+  GstVideoInfo vi;
+
+  if (!gst_video_info_from_caps (&vi, caps))
+    return FALSE;
+
+  *caps_changed_ptr = FALSE;
+  if (video_info_changed (info, &vi)) {
+    *caps_changed_ptr = video_info_is_filled (info);
+    *info = vi;
+  }
+
+  return TRUE;
+}
+
 static gboolean
 gst_vaapipostproc_update_sink_caps (GstVaapiPostproc * postproc, GstCaps * caps,
     gboolean * caps_changed_ptr)
@@ -864,12 +890,10 @@ gst_vaapipostproc_update_sink_caps (GstVaapiPostproc * postproc, GstCaps * caps,
 
   GST_INFO_OBJECT (postproc, "new sink caps = %" GST_PTR_FORMAT, caps);
 
-  if (!gst_video_info_from_caps (&vi, caps))
+  if (!video_info_update (caps, &postproc->sinkpad_info, caps_changed_ptr))
     return FALSE;
 
-  if (video_info_changed (&postproc->sinkpad_info, &vi))
-    postproc->sinkpad_info = vi, *caps_changed_ptr = TRUE;
-
+  vi = postproc->sinkpad_info;
   deinterlace = is_deinterlace_enabled (postproc, &vi);
   if (deinterlace)
     postproc->flags |= GST_VAAPI_POSTPROC_FLAG_DEINTERLACE;
@@ -885,16 +909,11 @@ static gboolean
 gst_vaapipostproc_update_src_caps (GstVaapiPostproc * postproc, GstCaps * caps,
     gboolean * caps_changed_ptr)
 {
-  GstVideoInfo vi;
-
   GST_INFO_OBJECT (postproc, "new src caps = %" GST_PTR_FORMAT, caps);
 
-  if (!gst_video_info_from_caps (&vi, caps))
+  if (!video_info_update (caps, &postproc->srcpad_info, caps_changed_ptr))
     return FALSE;
 
-  if (video_info_changed (&postproc->srcpad_info, &vi))
-    postproc->srcpad_info = vi, *caps_changed_ptr = TRUE;
-
   if (postproc->format != GST_VIDEO_INFO_FORMAT (&postproc->sinkpad_info) &&
       postproc->format != DEFAULT_FORMAT)
     postproc->flags |= GST_VAAPI_POSTPROC_FLAG_FORMAT;