Do not enable the rew/pause/ffwd buttons when the media being played does not

support these functions.
This extends the MediaPlayerControl interface with some new methods, and uses
reflection to detect whether the old or new interface is used by an application.

1 files changed, 29 insertions, 1 deletions

diff --git a/core/java/android/widget/VideoView.java b/core/java/android/widget/VideoView.java
index 5bc25073f774..e60ff25703f9 100644
--- a/core/java/android/widget/VideoView.java
+++ b/core/java/android/widget/VideoView.java
@@ -23,6 +23,7 @@ import android.content.Intent;
 import android.content.res.Resources;
 import android.media.AudioManager;
 import android.media.MediaPlayer;
+import android.media.Metadata;
 import android.media.MediaPlayer.OnCompletionListener;
 import android.media.MediaPlayer.OnErrorListener;
 import android.net.Uri;
@@ -34,7 +35,7 @@ import android.view.MotionEvent;
 import android.view.SurfaceHolder;
 import android.view.SurfaceView;
 import android.view.View;
-import android.widget.MediaController.MediaPlayerControl;
+import android.widget.MediaController.*;
 
 import java.io.IOException;
 
@@ -81,6 +82,9 @@ public class VideoView extends SurfaceView implements MediaPlayerControl {
     private int         mCurrentBufferPercentage;
     private OnErrorListener mOnErrorListener;
     private int         mSeekWhenPrepared;  // recording the seek position while preparing
+    private boolean     mCanPause;
+    private boolean     mCanSeekBack;
+    private boolean     mCanSeekForward;
 
     public VideoView(Context context) {
         super(context);
@@ -259,6 +263,17 @@ public class VideoView extends SurfaceView implements MediaPlayerControl {
     MediaPlayer.OnPreparedListener mPreparedListener = new MediaPlayer.OnPreparedListener() {
         public void onPrepared(MediaPlayer mp) {
             mCurrentState = STATE_PREPARED;
+
+            // Get the capabilities of the player for this stream
+            Metadata data = mp.getMetadata(MediaPlayer.METADATA_ALL,
+                                      MediaPlayer.BYPASS_METADATA_FILTER);
+            mCanPause = !data.has(Metadata.PAUSE_AVAILABLE)
+                    || data.getBoolean(Metadata.PAUSE_AVAILABLE);
+            mCanSeekBack = !data.has(Metadata.SEEK_BACKWARD_AVAILABLE)
+                    || data.getBoolean(Metadata.SEEK_BACKWARD_AVAILABLE);
+            mCanSeekForward = !data.has(Metadata.SEEK_FORWARD_AVAILABLE)
+                    || data.getBoolean(Metadata.SEEK_FORWARD_AVAILABLE);
+
             if (mOnPreparedListener != null) {
                 mOnPreparedListener.onPrepared(mMediaPlayer);
             }
@@ -267,6 +282,7 @@ public class VideoView extends SurfaceView implements MediaPlayerControl {
             }
             mVideoWidth = mp.getVideoWidth();
             mVideoHeight = mp.getVideoHeight();
+
             int seekToPosition = mSeekWhenPrepared;  // mSeekWhenPrepared may be changed after seekTo() call
             if (seekToPosition != 0) {
                 seekTo(seekToPosition);
@@ -580,4 +596,16 @@ public class VideoView extends SurfaceView implements MediaPlayerControl {
                 mCurrentState != STATE_IDLE &&
                 mCurrentState != STATE_PREPARING);
     }
+
+    public boolean canPause() {
+        return mCanPause;
+    }
+
+    public boolean canSeekBackward() {
+        return mCanSeekBack;
+    }
+
+    public boolean canSeekForward() {
+        return mCanSeekForward;
+    }
 }