[Web MIDI] Use Android MIDI API.

media/midi/java/src/org/chromium/media/midi/MidiDeviceAndroid.java

Index: media/midi/java/src/org/chromium/media/midi/MidiDeviceAndroid.java
diff --git a/media/midi/java/src/org/chromium/media/midi/MidiDeviceAndroid.java b/media/midi/java/src/org/chromium/media/midi/MidiDeviceAndroid.java
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index 0000000000000000000000000000000000000000..b6ccac3ff7adbeb301e5b0d986844f5cdf0f9810
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+++ b/media/midi/java/src/org/chromium/media/midi/MidiDeviceAndroid.java
@@ -0,0 +1,132 @@
+// 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.chromium.media.midi;
+
+import android.media.midi.MidiDevice;
+import android.media.midi.MidiDeviceInfo;
+
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.base.annotations.JNINamespace;
+
+@JNINamespace("media::midi")
+/**
+ * A class implementing media::midi::MidiDeviceAndroid functionality.
+ */
+class MidiDeviceAndroid {
+    /**
+     * The underlying device.
+     */
+    private final MidiDevice mDevice;
+    /**
+     * The input ports in the device.
+     */
+    private final MidiInputPortAndroid[] mInputPorts;
+    /**
+     * The output ports in the device.
+     */
+    private final MidiOutputPortAndroid[] mOutputPorts;
+    /**
+     * True when the device is open.
+     */
+    private boolean mIsOpen;
+
+    /**
+     * constructor
+     * @param device the underlying device
+     */
+    MidiDeviceAndroid(MidiDevice device) {
+        mIsOpen = true;
+        mDevice = device;
+        // Note we use "input" and "output" in the Web MIDI manner.
+
+        mOutputPorts = new MidiOutputPortAndroid[getInfo().getInputPortCount()];
+        for (int i = 0; i < mOutputPorts.length; ++i) {
+            mOutputPorts[i] = new MidiOutputPortAndroid(device, i);
+        }
+
+        mInputPorts = new MidiInputPortAndroid[getInfo().getOutputPortCount()];
+        for (int i = 0; i < mInputPorts.length; ++i) {
+            mInputPorts[i] = new MidiInputPortAndroid(device, i);
+        }
+    }
+
+    /**
+     * Returns true when the device is open.
+     */
+    boolean isOpen() {
+        return mIsOpen;
+    }
+
+    /**
+     * Closes the device.
+     */
+    void close() {
+        mIsOpen = false;
+        for (MidiInputPortAndroid port : mInputPorts) {
+            port.close();
+        }
+        for (MidiOutputPortAndroid port : mOutputPorts) {
+            port.close();
+        }
+    }
+
+    /**
+     * Returns the underlying device.
+     */
+    MidiDevice getDevice() {
+        return mDevice;
+    }
+
+    /**
+     * Returns the underlying device information.
+     */
+    MidiDeviceInfo getInfo() {
+        return mDevice.getInfo();
+    }
+
+    /**
+     * Returns the manufacturer name.
+     */
+    @CalledByNative
+    String getManufacturer() {
+        return getProperty(MidiDeviceInfo.PROPERTY_MANUFACTURER);
+    }
+
+    /**
+     * Returns the product name.
+     */
+    @CalledByNative
+    String getProduct() {
+        return getProperty(MidiDeviceInfo.PROPERTY_PRODUCT);
+    }
+
+    /**
+     * Returns the version string.
+     */
+    @CalledByNative
+    String getVersion() {
+        return getProperty(MidiDeviceInfo.PROPERTY_VERSION);
+    }
+
+    /**
+     * Returns the associated input ports.
+     */
+    @CalledByNative
+    MidiInputPortAndroid[] getInputPorts() {
+        return mInputPorts;
+    }
+
+    /**
+     * Returns the associated output ports.
+     */
+    @CalledByNative
+    MidiOutputPortAndroid[] getOutputPorts() {
+        return mOutputPorts;
+    }
+
+    private String getProperty(String name) {
+        return mDevice.getInfo().getProperties().getString(name);
+    }
+}