gstreamer-video: VideoRectangle bindings

gstreamer-video/src/lib.rs

@@ -60,6 +60,8 @@ mod video_event;
 pub use video_event::*;
 mod functions;
 pub use functions::*;
+mod video_rectangle;
+pub use video_rectangle::*;
 
 // Re-export all the traits in a prelude module, so that applications
 // can always "use gst::prelude::*" without getting conflicts

gstreamer-video/src/video_rectangle.rs

@@ -0,0 +1,35 @@
+// Copyright (C) 2017 Philippe Normand <philn@igalia.com~
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use ffi;
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
+pub struct VideoRectangle {
+    pub x: i32,
+    pub y: i32,
+    pub w: i32,
+    pub h: i32,
+}
+
+impl VideoRectangle {
+    pub fn new(x: i32, y: i32, w: i32, h: i32) -> Self {
+        VideoRectangle {
+            x, y, w, h
+        }
+    }
+}
+
+pub fn center_video_rectangle(src: VideoRectangle, dst: VideoRectangle, scale: bool) -> VideoRectangle {
+    let mut result = ffi::GstVideoRectangle { x: 0, y: 0, w: 0, h: 0 };
+    let src_rect = ffi::GstVideoRectangle { x: src.x, y: src.y, w: src.w, h: src.h };
+    let dst_rect = ffi::GstVideoRectangle { x: dst.x, y: dst.y, w: dst.w, h: dst.h };
+    unsafe {
+        ffi::gst_video_sink_center_rect(src_rect, dst_rect, &mut result, scale as i32);
+    }
+    VideoRectangle::new(result.x, result.y, result.w, result.h)
+}