Add a sky media service to make it possible to play a sound.

sky/services/media/src/org/domokit/media/MediaPlayerImpl.java

Index: sky/services/media/src/org/domokit/media/MediaPlayerImpl.java
diff --git a/sky/services/media/src/org/domokit/media/MediaPlayerImpl.java b/sky/services/media/src/org/domokit/media/MediaPlayerImpl.java
new file mode 100644
index 0000000000000000000000000000000000000000..4bf4c8cc4e544f81da1644608e64689bb52f70ff
--- /dev/null
+++ b/sky/services/media/src/org/domokit/media/MediaPlayerImpl.java
@@ -0,0 +1,112 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.domokit.media;
+
+import android.content.Context;
+import android.util.Log;
+
+import org.chromium.mojo.common.DataPipeUtils;
+import org.chromium.mojo.system.Core;
+import org.chromium.mojo.system.DataPipe;
+import org.chromium.mojo.system.MojoException;
+import org.chromium.mojom.media.MediaPlayer;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.concurrent.Executor;
+
+/**
+ * Android implementation of MediaPlayer.
+ */
+public class MediaPlayerImpl implements MediaPlayer, android.media.MediaPlayer.OnPreparedListener {
+    private static final String TAG = "MediaPlayerImpl";
+    private final Core mCore;
+    private final Context mContext;
+    private final Executor mExecutor;
+    private final android.media.MediaPlayer mPlayer;
+    private PrepareResponse mPrepareResponse;
+    private File mTempFile;
+
+    public MediaPlayerImpl(Core core, Context context, Executor executor) {
+        mCore = core;
+        mContext = context;
+        mExecutor = executor;
+        mPlayer = new android.media.MediaPlayer();
+        mTempFile = null;
+        mPrepareResponse = null;
+    }
+
+    @Override
+    public void close() {
+        mPlayer.release();
+        if (mTempFile != null) {
+            mTempFile.delete();
+        }
+    }
+
+    @Override
+    public void onConnectionError(MojoException e) {
+    }
+
+    @Override
+    public void onPrepared(android.media.MediaPlayer mp) {
+        assert mPlayer == mp;
+        assert mPrepareResponse != null;
+        // ignored argument due to https://github.com/domokit/mojo/issues/282
+        boolean ignored = true;
+        mPrepareResponse.call(ignored);
+    }
+
+    public void copyComplete() {
+        try {
+            mPlayer.setOnPreparedListener(this);
+            mPlayer.setDataSource(mTempFile.getCanonicalPath());
+            mPlayer.prepare();
+        } catch (java.io.IOException e) {
+            Log.e(TAG, "Exception", e);
+            mPrepareResponse.call(false);
+            mPrepareResponse = null;
+        }
+    }
+
+    @Override
+    public void prepare(DataPipe.ConsumerHandle consumerHandle, PrepareResponse callback) {
+        // TODO(eseidel): Ideally we'll find a way to hand the data straight
+        // to Android's audio system w/o first having to dump it to a file.
+        File outputDir = mContext.getCacheDir();
+        mPrepareResponse = callback;
+        try {
+            mTempFile = File.createTempFile("hack", "hack", outputDir);

[abarth-chromium, 2015/07/01 17:52:14]

"hack", "hack"  ->  Can we use better names?

+        } catch (IOException e) {
+            Log.e(TAG, "Failed to create temporary file", e);
+            callback.call(false);
+            return; // TODO(eseidel): We should close the pipe?
+        }
+
+        // TODO(eseidel): I don't understand static methods in java.
+        DataPipeUtils utils = new DataPipeUtils();
+        utils.copyToFile(mCore, consumerHandle, mTempFile, mExecutor, new Runnable() {

[abarth-chromium, 2015/07/01 17:52:14]

We should be able to make it a static method.

+            @Override
+            public void run() {
+                copyComplete();
+            }
+        });
+    }
+
+    @Override
+    public void start() {
+        mPlayer.start();
+    }
+
+    @Override
+    public void seekTo(int msec) {
+        mPlayer.seekTo(msec);
+    }
+
+    @Override
+    public void pause() {
+        mPlayer.pause();
+    }
+}