From bd3caf0c04393905e7316aefff5df4134bebd63d Mon Sep 17 00:00:00 2001
From: "U. Artie Eoff" <ullysses.a.eoff@intel.com>
Date: Wed, 21 Aug 2019 10:46:43 -0700
Subject: [PATCH] msdk: vpp: rotate output frame

When vpp rotation is 90 or 270, the output frame
should be rotated, too.

Example:
  gst-launch-1.0 -vf videotestsrc \
   ! video/x-raw,width=720,height=480 \
   ! msdkvpp rotation=90 ! vaapisink
---
 sys/msdk/gstmsdkvpputil.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sys/msdk/gstmsdkvpputil.c b/sys/msdk/gstmsdkvpputil.c
index eef85ed..402aaeb 100644
--- a/sys/msdk/gstmsdkvpputil.c
+++ b/sys/msdk/gstmsdkvpputil.c
@@ -28,6 +28,10 @@
 #include "gstmsdkvpputil.h"
 #include "msdk-enums.h"
 
+#define SWAP_GINT(a, b) do {      \
+        const gint t = a; a = b; b = t; \
+    } while (0)
+
 gboolean
 gst_msdkvpp_is_deinterlace_enabled (GstMsdkVPP * msdkvpp, GstVideoInfo * vip)
 {
@@ -75,6 +79,12 @@ fixate_output_frame_size (GstMsdkVPP * thiz, GstVideoInfo * vinfo,
     from_w = GST_VIDEO_INFO_WIDTH (vinfo);
     from_h = GST_VIDEO_INFO_HEIGHT (vinfo);
 
+    /* compensate for rotation if needed */
+    if (thiz->rotation == 90 || thiz->rotation == 270) {
+      SWAP_GINT (from_w, from_h);
+      SWAP_GINT (from_par_n, from_par_d);
+    }
+
     gst_structure_get_int (outs, "width", &w);
     gst_structure_get_int (outs, "height", &h);
 
-- 
2.7.4