Improve camera documentation.

bug:3212606
Change-Id: Iee7106e4665c08a4c75471114010b75d63ac74ce

1 files changed, 8 insertions, 6 deletions

diff --git a/include/camera/Camera.h b/include/camera/Camera.h
index e6d84ba..e734c38 100644
--- a/include/camera/Camera.h
+++ b/include/camera/Camera.h
@@ -105,8 +105,8 @@ enum {
 };
 
 enum {
-    CAMERA_FACING_BACK = 0,
-    CAMERA_FACING_FRONT = 1 /* The camera faces to the user */
+    CAMERA_FACING_BACK = 0, /* The facing of the camera is opposite to that of the screen. */
+    CAMERA_FACING_FRONT = 1 /* The facing of the camera is the same as that of the screen. */
 };
 
 struct CameraInfo {
@@ -122,10 +122,12 @@ struct CameraInfo {
      * camera image needs to be rotated clockwise so it shows correctly on
      * the display in its natural orientation. It should be 0, 90, 180, or 270.
      *
-     * For example, suppose a device has a naturally tall screen, but the camera
-     * sensor is mounted in landscape. If the top side of the camera sensor is
-     * aligned with the right edge of the display in natural orientation, the
-     * value should be 90.
+     * For example, suppose a device has a naturally tall screen. The
+     * back-facing camera sensor is mounted in landscape. You are looking at
+     * the screen. If the top side of the camera sensor is aligned with the
+     * right edge of the screen in natural orientation, the value should be
+     * 90. If the top side of a front-facing camera sensor is aligned with
+     * the right of the screen, the value should be 270.
      */
     int orientation;
 };