From dbb58f4152ca64da16eb5d23b4cbdac4828b06c3 Mon Sep 17 00:00:00 2001
From: Sreerenj Balachandran <sreerenj.balachandran@intel.com>
Date: Fri, 15 Feb 2013 18:24:24 +0200
Subject: [PATCH] plugins: add helper functions to set the render rectangle.

Some video clips may have a clipping region that needs to propogate to
the renderer. These helper functions make it possible to attach that
clipping region, as a GstVaapiRectangle, the the video meta associated
with the buffer.

Signed-off-by: Sreerenj Balachandran <sreerenj.balachandran@intel.com>
signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
---
 gst/vaapi/gstvaapivideometa.c | 43 +++++++++++++++++++++++++++++++++++
 gst/vaapi/gstvaapivideometa.h |  9 ++++++++
 2 files changed, 52 insertions(+)

diff --git a/gst/vaapi/gstvaapivideometa.c b/gst/vaapi/gstvaapivideometa.c
index 77b8af4c41..e05466419a 100644
--- a/gst/vaapi/gstvaapivideometa.c
+++ b/gst/vaapi/gstvaapivideometa.c
@@ -46,6 +46,8 @@ struct _GstVaapiVideoMeta {
     GstVaapiSurfaceProxy       *proxy;
     GFunc                       converter;
     guint                       render_flags;
+    GstVaapiRectangle           render_rect;
+    guint                       has_render_rect : 1;
 };
 
 static inline void
@@ -158,6 +160,7 @@ gst_vaapi_video_meta_init(GstVaapiVideoMeta *meta)
     meta->proxy         = NULL;
     meta->converter     = NULL;
     meta->render_flags  = 0;
+    meta->has_render_rect = FALSE;
 }
 
 static inline GstVaapiVideoMeta *
@@ -229,6 +232,10 @@ gst_vaapi_video_meta_copy(GstVaapiVideoMeta *meta)
         gst_vaapi_surface_proxy_ref(meta->proxy) : NULL;
     copy->converter     = meta->converter;
     copy->render_flags  = meta->render_flags;
+
+    copy->has_render_rect = meta->has_render_rect;
+    if (copy->has_render_rect)
+        copy->render_rect = meta->render_rect;
     return copy;
 }
 
@@ -708,6 +715,42 @@ gst_vaapi_video_meta_set_render_flags(GstVaapiVideoMeta *meta, guint flags)
     meta->render_flags = flags;
 }
 
+/**
+ * gst_vaapi_video_meta_get_render_rect:
+ * @meta: a #GstVaapiVideoMeta
+ *
+ * Retrieves the render rectangle bound to the @meta
+ *
+ * Return value: render rectangle associated with the video meta.
+ */
+const GstVaapiRectangle *
+gst_vaapi_video_meta_get_render_rect(GstVaapiVideoMeta *meta)
+{
+    g_return_val_if_fail(GST_VAAPI_IS_VIDEO_META(meta), NULL);
+
+    if (!meta->has_render_rect)
+        return NULL;
+    return &meta->render_rect;
+}
+
+/**
+ * gst_vaapi_video_meta_set_render_rect:
+ * @meta: a #GstVaapiVideoMeta
+ * @rect: a #GstVaapiRectangle
+ *
+ * Sets the render rectangle @rect to the @meta.
+ */
+void
+gst_vaapi_video_meta_set_render_rect(GstVaapiVideoMeta *meta,
+    const GstVaapiRectangle *rect)
+{
+    g_return_if_fail(GST_VAAPI_IS_VIDEO_META(meta));
+
+    meta->has_render_rect = rect != NULL;
+    if (meta->has_render_rect)
+        meta->render_rect = *rect;
+}
+
 #if GST_CHECK_VERSION(1,0,0)
 
 #define GST_VAAPI_VIDEO_META_HOLDER(meta) \
diff --git a/gst/vaapi/gstvaapivideometa.h b/gst/vaapi/gstvaapivideometa.h
index 93b40ed68a..cb1dc2b61b 100644
--- a/gst/vaapi/gstvaapivideometa.h
+++ b/gst/vaapi/gstvaapivideometa.h
@@ -135,6 +135,15 @@ G_GNUC_INTERNAL
 void
 gst_vaapi_video_meta_set_render_flags(GstVaapiVideoMeta *meta, guint flags);
 
+G_GNUC_INTERNAL
+const GstVaapiRectangle *
+gst_vaapi_video_meta_get_render_rect(GstVaapiVideoMeta *meta);
+
+G_GNUC_INTERNAL
+void
+gst_vaapi_video_meta_set_render_rect(GstVaapiVideoMeta *meta,
+    const GstVaapiRectangle *rect);
+
 G_GNUC_INTERNAL
 GstVaapiVideoMeta *
 gst_buffer_get_vaapi_video_meta(GstBuffer *buffer);