[Web MIDI] Use Android MIDI API.

media/midi/midi_manager_android.h

+// 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.
+
+#ifndef MEDIA_MIDI_MIDI_MANAGER_ANDROID_H_
+#define MEDIA_MIDI_MIDI_MANAGER_ANDROID_H_
+
+#include <jni.h>
+#include <vector>
+
+#include "base/android/scoped_java_ref.h"
+#include "base/basictypes.h"
+#include "base/containers/hash_tables.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
+#include "base/time/time.h"
+#include "media/midi/midi_input_port_android.h"
+#include "media/midi/midi_manager.h"
+#include "media/midi/midi_scheduler.h"
+
+namespace media {
+namespace midi {
+
+class MidiDeviceAndroid;
+class MidiOutputPortAndroid;
+
+// MidiManagerAndroid is a midi manager subclass for Android M or newer. For
+// older android OSes, we use MidiManagerUsb.
+class MidiManagerAndroid final : public MidiManager,
+                                 public MidiInputPortAndroid::Delegate {
+ public:
+  MidiManagerAndroid();
+  ~MidiManagerAndroid() override;
+
+  // MidiManager implementation.
+  void StartInitialization() override;
+  void DispatchSendMidiData(MidiManagerClient* client,
+                            uint32 port_index,
+                            const std::vector<uint8>& data,
+                            double timestamp) override;
+
+  // MidiInputPortAndroid::Delegate implementation.
+  void OnReceivedData(MidiInputPortAndroid*,
+                      const uint8* data,
+                      size_t size,
+                      base::TimeTicks timestamp) override;
+
+  // Called from the Java world.
+  void OnInitialized(JNIEnv* env, jobject caller, jobjectArray devices);
+  void OnAttached(JNIEnv* env, jobject caller, jobject device);
+  void OnDetached(JNIEnv* env, jobject caller, jobject device);
+
+  static bool Register(JNIEnv* env);
+
+ private:
+  void AddDevice(scoped_ptr<MidiDeviceAndroid> device);
+  void AddInputPortAndroid(MidiInputPortAndroid* port,
+                           MidiDeviceAndroid* device);
+  void AddOutputPortAndroid(MidiOutputPortAndroid* port,
+                            MidiDeviceAndroid* device);
+
+  ScopedVector<MidiDeviceAndroid> devices_;
+  // All ports held in |devices_|. Each device has ownership of ports, but we
+  // can store pointers here because a device will keep its ports while it is
+  // alive.
+  std::vector<MidiInputPortAndroid*> all_input_ports_;
+  // A dictionary from a port to its index.
+  // input_port_to_index_[all_input_ports_[i]] == i for each valid |i|.
+  base::hash_map<MidiInputPortAndroid*, size_t> input_port_to_index_;
+
+  // Ditto for output ports.
+  std::vector<MidiOutputPortAndroid*> all_output_ports_;
+  base::hash_map<MidiOutputPortAndroid*, size_t> output_port_to_index_;
+
+  base::android::ScopedJavaGlobalRef<jobject> raw_manager_;
+  scoped_ptr<MidiScheduler> scheduler_;
+};
+
+}  // namespace midi
+}  // namespace media
+
+#endif  // MEDIA_MIDI_MIDI_MANAGER_ANDROID_H_