1 files changed, 118 insertions, 0 deletions
diff --git a/src/org/codeaurora/gallery3d/video/StereoAudioHooker.java b/src/org/codeaurora/gallery3d/video/StereoAudioHooker.java
new file mode 100755
index 000000000..cbf2f357a
--- /dev/null
+++ b/src/org/codeaurora/gallery3d/video/StereoAudioHooker.java
@@ -0,0 +1,118 @@
+package org.codeaurora.gallery3d.video;
+
+import android.content.Context;
+import android.media.AudioManager;
+import android.util.Log;
+import android.view.Menu;
+import android.view.MenuItem;
+
+import com.android.gallery3d.R;
+
+public class StereoAudioHooker extends MovieHooker {
+    private static final String TAG = "StereoAudioHooker";
+    private static final boolean LOG = false;
+
+    private static final int MENU_STEREO_AUDIO = 1;
+    private MenuItem mMenuStereoAudio;
+
+    private static final String KEY_STEREO = "EnableStereoOutput";
+    private boolean mSystemStereoAudio;
+    private boolean mCurrentStereoAudio;
+    private boolean mIsInitedStereoAudio;
+    private AudioManager mAudioManager;
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        enableStereoAudio();
+    }
+
+    @Override
+    public void onStop() {
+        super.onStop();
+        restoreStereoAudio();
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(final Menu menu) {
+        super.onCreateOptionsMenu(menu);
+        mMenuStereoAudio = menu.add(0, getMenuActivityId(MENU_STEREO_AUDIO), 0,
+                R.string.single_track);
+        return true;
+    }
+
+    @Override
+    public boolean onPrepareOptionsMenu(final Menu menu) {
+        super.onPrepareOptionsMenu(menu);
+        updateStereoAudioIcon();
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(final MenuItem item) {
+        super.onOptionsItemSelected(item);
+        if(getMenuOriginalId(item.getItemId()) == MENU_STEREO_AUDIO) {
+            mCurrentStereoAudio = !mCurrentStereoAudio;
+            setStereoAudio(mCurrentStereoAudio);
+            return true;
+        }
+        return false;
+    }
+
+    private boolean getStereoAudio() {
+        boolean isstereo = false;
+        if (mAudioManager == null) {
+            mAudioManager = (AudioManager) getContext().getSystemService(Context.AUDIO_SERVICE);
+        }
+        final String stereo = mAudioManager.getParameters(KEY_STEREO);
+        final String key = KEY_STEREO + "=1";
+        if (stereo != null && stereo.indexOf(key) > -1) {
+            isstereo = true;
+        } else {
+            isstereo = false;
+        }
+        if (LOG) {
+            Log.v(TAG, "getStereoAudio() isstereo=" + isstereo + ", stereo=" + stereo
+                    + ", key=" + key);
+        }
+        return isstereo;
+    }
+
+    private void setStereoAudio(final boolean flag) {
+        final String value = KEY_STEREO + "=" + (flag ? "1" : "0");
+        if (mAudioManager == null) {
+            mAudioManager = (AudioManager) getContext().getSystemService(Context.AUDIO_SERVICE);
+        }
+        mAudioManager.setParameters(value);
+        if (LOG) {
+            Log.v(TAG, "setStereoAudio(" + flag + ") value=" + value);
+        }
+    }
+
+    private void updateStereoAudioIcon() {
+        if (mMenuStereoAudio != null) {
+            mMenuStereoAudio.setTitle(mCurrentStereoAudio?R.string.single_track:R.string.stereo);
+            mMenuStereoAudio.setIcon(mCurrentStereoAudio?R.drawable.ic_menu_single_track:R.drawable.ic_menu_stereo);
+        }
+    }
+
+    private void enableStereoAudio() {
+        if (LOG) {
+            Log.v(TAG, "enableStereoAudio() mIsInitedStereoAudio=" + mIsInitedStereoAudio
+                    + ", mCurrentStereoAudio=" + mCurrentStereoAudio);
+        }
+        mSystemStereoAudio = getStereoAudio();
+        if (!mIsInitedStereoAudio) {
+            mCurrentStereoAudio = mSystemStereoAudio;
+            mIsInitedStereoAudio = true;
+        } else {
+            // restore old stereo type
+            setStereoAudio(mCurrentStereoAudio);
+        }
+        updateStereoAudioIcon();
+    }
+
+    private void restoreStereoAudio() {
+        setStereoAudio(mSystemStereoAudio);
+    }
+}