buffer: Store derived surface id and buffer info for dma-buf export

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

src/buffer.c

@@ -85,6 +85,9 @@ VAStatus RequestCreateBuffer(VADriverContextP context, VAContextID context_id,
 	buffer_object->data = buffer_data;
 	buffer_object->size = size;
 
+	buffer_object->derived_surface_id = VA_INVALID_ID;
+	buffer_object->info.handle = (uintptr_t) -1;
+
 	*buffer_id = id;
 
 	status = VA_STATUS_SUCCESS;

src/buffer.h

@@ -44,6 +44,9 @@ struct object_buffer {
 
 	void *data;
 	unsigned int size;
+
+	VASurfaceID derived_surface_id;
+	VABufferInfo info;
 };
 
 VAStatus RequestCreateBuffer(VADriverContextP context, VAContextID context_id,

src/image.c

@@ -122,8 +122,8 @@ VAStatus RequestDeriveImage(VADriverContextP context, VASurfaceID surface_id,
 	struct request_data *driver_data = context->pDriverData;
 	struct object_surface *surface_object;
 	struct object_buffer *buffer_object;
-	unsigned int i;
 	VAImageFormat format;
+	unsigned int i;
 	VAStatus status;
 
 	surface_object = SURFACE(driver_data, surface_id);
@@ -134,8 +134,6 @@ VAStatus RequestDeriveImage(VADriverContextP context, VASurfaceID surface_id,
 		status = RequestSyncSurface(context, surface_id);
 		if (status != VA_STATUS_SUCCESS)
 			return status;
-	} else if (surface_object->status == VASurfaceReady) {
-		return VA_STATUS_SUCCESS;
 	}
 
 	format.fourcc = VA_FOURCC_NV12;
@@ -164,6 +162,8 @@ VAStatus RequestDeriveImage(VADriverContextP context, VASurfaceID surface_id,
 
 	surface_object->status = VASurfaceReady;
 
+	buffer_object->derived_surface_id = surface_id;
+
 	return VA_STATUS_SUCCESS;
 }