[Web MIDI] Use Android MIDI API.

media/midi/midi_device_android.cc

Index: media/midi/midi_device_android.cc
diff --git a/media/midi/midi_device_android.cc b/media/midi/midi_device_android.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0acad511a04e365cb4833bcc1532955e4870714f
--- /dev/null
+++ b/media/midi/midi_device_android.cc
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+// 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.
+
+#include "media/midi/midi_device_android.h"
+
+#include <string>
+
+#include "jni/MidiDeviceAndroid_jni.h"
+#include "media/midi/midi_output_port_android.h"
+
+namespace media {
+namespace midi {
+
+MidiDeviceAndroid::MidiDeviceAndroid(JNIEnv* env,
+                                     jobject raw_device,
+                                     MidiInputPortAndroid::Delegate* delegate)
+    : raw_device_(env, raw_device) {
+  ScopedJavaLocalRef<jobjectArray> raw_input_ports =
+      Java_MidiDeviceAndroid_getInputPorts(env, raw_device);
+  jsize num_input_ports = env->GetArrayLength(raw_input_ports.obj());
+
+  for (jsize i = 0; i < num_input_ports; ++i) {
+    jobject port = env->GetObjectArrayElement(raw_input_ports.obj(), i);
+    input_ports_.push_back(new MidiInputPortAndroid(env, port, delegate));
+  }
+
+  ScopedJavaLocalRef<jobjectArray> raw_output_ports =
+      Java_MidiDeviceAndroid_getOutputPorts(env, raw_device);
+  jsize num_output_ports = env->GetArrayLength(raw_output_ports.obj());
+  for (jsize i = 0; i < num_output_ports; ++i) {
+    jobject port = env->GetObjectArrayElement(raw_output_ports.obj(), i);
+    output_ports_.push_back(new MidiOutputPortAndroid(env, port));
+  }
+}
+
+MidiDeviceAndroid::~MidiDeviceAndroid() {
+}
+
+std::string MidiDeviceAndroid::GetManufacturer() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> ret =
+      Java_MidiDeviceAndroid_getManufacturer(env, raw_device_.obj());
+  return std::string(env->GetStringUTFChars(ret.obj(), nullptr),
+                     env->GetStringUTFLength(ret.obj()));
+}
+
+std::string MidiDeviceAndroid::GetProductName() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> ret =
+      Java_MidiDeviceAndroid_getProduct(env, raw_device_.obj());
+  return std::string(env->GetStringUTFChars(ret.obj(), nullptr),
+                     env->GetStringUTFLength(ret.obj()));
+}
+
+std::string MidiDeviceAndroid::GetDeviceVersion() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> ret =
+      Java_MidiDeviceAndroid_getVersion(env, raw_device_.obj());
+  return std::string(env->GetStringUTFChars(ret.obj(), nullptr),
+                     env->GetStringUTFLength(ret.obj()));
+}
+
+bool MidiDeviceAndroid::Register(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace midi
+}  // namespace media