Add a new public API to support recording rotated videos

o changed a comment about the rotation orientation from counter-clockwise
  to clockwise.

Change-Id: I16ad73ce1a55cc627d9a516e23d1325753b3037e

1 files changed, 25 insertions, 0 deletions

diff --git a/media/java/android/media/MediaRecorder.java b/media/java/android/media/MediaRecorder.java
index b38124e..c102de4 100644
--- a/media/java/android/media/MediaRecorder.java
+++ b/media/java/android/media/MediaRecorder.java
@@ -285,6 +285,31 @@ public class MediaRecorder
     }
 
     /**
+     * Sets the orientation hint for output video playback.
+     * This method should be called before start(). This method will not
+     * trigger the source video frame to rotate during video recording, but to
+     * add a composition matrix containing the rotation angle in the output
+     * video if the output format is OutputFormat.THREE_GPP or
+     * OutputFormat.MPEG_4 so that a video player can choose the proper
+     * orientation for playback. Note that some video players may choose
+     * to ignore the compostion matrix in a video during playback.
+     *
+     * @param degrees the angle to be rotated clockwise in degrees.
+     * The supported angles are 0, 90, 180, and 270 degrees.
+     * @throws IllegalArgumentException if the angle is not supported.
+     *
+     */
+    public void setOrientationHint(int degrees) {
+        if (degrees != 0   &&
+            degrees != 90  &&
+            degrees != 180 &&
+            degrees != 270) {
+            throw new IllegalArgumentException("Unsupported angle: " + degrees);
+        }
+        setParameter(String.format("video-param-rotation-angle-degrees=%d", degrees));
+    }
+
+    /**
      * Sets the format of the output file produced during recording. Call this
      * after setAudioSource()/setVideoSource() but before prepare().
      *