Add support for GstVaapiSurfaceProxy to GstVaapiVideoBuffer.

gst-libs/gst/vaapi/gstvaapivideobuffer.c

@@ -43,6 +43,7 @@ struct _GstVaapiVideoBufferPrivate {
     GstVaapiImage              *image;
     GstVaapiVideoPool          *surface_pool;
     GstVaapiSurface            *surface;
+    GstVaapiSurfaceProxy       *proxy;
     guint                       flags;
 };
 
@@ -70,6 +71,11 @@ gst_vaapi_video_buffer_destroy_surface(GstVaapiVideoBuffer *buffer)
 {
     GstVaapiVideoBufferPrivate * const priv = buffer->priv;
 
+    if (priv->proxy) {
+        g_object_unref(priv->proxy);
+        priv->proxy = NULL;
+    }
+
     if (priv->surface) {
         if (priv->surface_pool)
             gst_vaapi_video_pool_put_object(priv->surface_pool, priv->surface);
@@ -119,6 +125,7 @@ gst_vaapi_video_buffer_init(GstVaapiVideoBuffer *buffer)
     priv->image         = NULL;
     priv->surface_pool  = NULL;
     priv->surface       = NULL;
+    priv->proxy         = NULL;
 }
 
 static inline GstVaapiVideoBuffer *
@@ -215,6 +222,28 @@ gst_vaapi_video_buffer_new_with_surface(GstVaapiSurface *surface)
     return GST_BUFFER(buffer);
 }
 
+/**
+ * gst_vaapi_video_buffer_new_with_surface_proxy:
+ * @proxy: a #GstVaapiSurfaceProxy
+ *
+ * Creates a #GstBuffer with the specified surface @proxy. The
+ * resulting buffer holds an additional reference to the @proxy.
+ *
+ * Return value: the newly allocated #GstBuffer, or %NULL on error
+ */
+GstBuffer *
+gst_vaapi_video_buffer_new_with_surface_proxy(GstVaapiSurfaceProxy *proxy)
+{
+    GstVaapiVideoBuffer *buffer;
+
+    g_return_val_if_fail(GST_VAAPI_IS_SURFACE_PROXY(proxy), NULL);
+
+    buffer = gst_vaapi_video_buffer_new();
+    if (buffer)
+        gst_vaapi_video_buffer_set_surface_proxy(buffer, proxy);
+    return GST_BUFFER(buffer);
+}
+
 /**
  * gst_vaapi_video_buffer_get_image:
  * @buffer: a #GstVaapiVideoBuffer
@@ -362,3 +391,49 @@ gst_vaapi_video_buffer_set_surface_from_pool(
     }
     return TRUE;
 }
+
+/**
+ * gst_vaapi_video_buffer_get_surface_proxy:
+ * @buffer: a #GstVaapiVideoBuffer
+ *
+ * Retrieves the #GstVaapiSurfaceProxy bound to the @buffer. The @buffer
+ * owns the #GstVaapiSurfaceProxy so the caller is responsible for calling
+ * g_object_ref() when needed.
+ *
+ * Return value: the #GstVaapiSurfaceProxy bound to the @buffer, or
+ *   %NULL if there is none
+ */
+GstVaapiSurfaceProxy *
+gst_vaapi_video_buffer_get_surface_proxy(GstVaapiVideoBuffer *buffer)
+{
+    g_return_val_if_fail(GST_VAAPI_IS_VIDEO_BUFFER(buffer), NULL);
+
+    return buffer->priv->proxy;
+}
+
+/**
+ * gst_vaapi_video_buffer_set_surface_proxy:
+ * @buffer: a #GstVaapiVideoBuffer
+ * @proxy: a #GstVaapiSurfaceProxy
+ *
+ * Binds surface @proxy to the @buffer. If the @buffer contains another
+ * surface previously allocated from a pool, it's pushed back to its
+ * parent pool and the pool is also released.
+ */
+void
+gst_vaapi_video_buffer_set_surface_proxy(
+    GstVaapiVideoBuffer  *buffer,
+    GstVaapiSurfaceProxy *proxy
+)
+{
+    g_return_if_fail(GST_VAAPI_IS_VIDEO_BUFFER(buffer));
+    g_return_if_fail(GST_VAAPI_IS_SURFACE_PROXY(proxy));
+
+    gst_vaapi_video_buffer_destroy_surface(buffer);
+
+    if (proxy) {
+        GstVaapiVideoBufferPrivate * const priv = buffer->priv;
+        priv->proxy   = g_object_ref(proxy);
+        priv->surface = g_object_ref(GST_VAAPI_SURFACE_PROXY_SURFACE(proxy));
+    }
+}

gst-libs/gst/vaapi/gstvaapivideobuffer.h

@@ -24,6 +24,7 @@
 #include <gst/gstbuffer.h>
 #include <gst/vaapi/gstvaapiimage.h>
 #include <gst/vaapi/gstvaapisurface.h>
+#include <gst/vaapi/gstvaapisurfaceproxy.h>
 #include <gst/vaapi/gstvaapivideopool.h>
 
 G_BEGIN_DECLS
@@ -90,6 +91,9 @@ gst_vaapi_video_buffer_new_with_image(GstVaapiImage *image);
 GstBuffer *
 gst_vaapi_video_buffer_new_with_surface(GstVaapiSurface *surface);
 
+GstBuffer *
+gst_vaapi_video_buffer_new_with_surface_proxy(GstVaapiSurfaceProxy *proxy);
+
 GstVaapiImage *
 gst_vaapi_video_buffer_get_image(GstVaapiVideoBuffer *buffer);
 
@@ -120,6 +124,15 @@ gst_vaapi_video_buffer_set_surface_from_pool(
     GstVaapiVideoPool   *pool
 );
 
+GstVaapiSurfaceProxy *
+gst_vaapi_video_buffer_get_surface_proxy(GstVaapiVideoBuffer *buffer);
+
+void
+gst_vaapi_video_buffer_set_surface_proxy(
+    GstVaapiVideoBuffer  *buffer,
+    GstVaapiSurfaceProxy *proxy
+);
+
 G_END_DECLS
 
 #endif /* GST_VAAPI_VIDEO_BUFFER_H */