chromecast/public/video_plane.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROMECAST_PUBLIC_VIDEO_PLANE_H_
   6 #define CHROMECAST_PUBLIC_VIDEO_PLANE_H_
   7
   8 namespace chromecast {
   9 struct RectF;
  10 struct Size;
  11
  12 namespace media {
  13
  14 class VideoPlane {
  15  public:
  16   // List of possible hardware transforms that can be applied to video.
  17   // Rotations are anticlockwise.
  18   enum Transform {
  19     TRANSFORM_NONE,
  20     ROTATE_90,
  21     ROTATE_180,
  22     ROTATE_270,
  23     FLIP_HORIZONTAL,
  24     FLIP_VERTICAL,
  25   };
  26
  27   enum CoordinateType {
  28     // Graphics plane as coordinate type.
  29     COORDINATE_TYPE_GRAPHICS_PLANE = 0,
  30     // Output display screen as coordinate type.
  31     COORDINATE_TYPE_SCREEN_RESOLUTION = 1,
  32   };
  33
  34   virtual ~VideoPlane() {}
  35
  36   // Gets output screen resolution.
  37   virtual Size GetScreenResolution() = 0;
  38
  39   // Updates the video plane geometry.
  40   // |display_rect| specifies the rectangle that the video should occupy.
  41   // |coordinate_type| gives the coordinate space of |display_rect|.
  42   // |transform| specifies how the video should be transformed within that
  43   // rectangle.
  44   virtual void SetGeometry(const RectF& display_rect,
  45                            CoordinateType coordinate_type,
  46                            Transform transform) = 0;
  47
  48   // Notifies VideoPlane that screen resolution has changed.
  49   virtual void OnScreenResolutionChanged(const Size& screen_res) = 0;
  50 };
  51
  52 }  // namespace media
  53 }  // namespace chromecast
  54
  55 #endif  // CHROMECAST_PUBLIC_VIDEO_PLANE_H_