media/midi/usb_midi_device_android.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_MIDI_USB_MIDI_DEVICE_ANDROID_H_
   6 #define MEDIA_MIDI_USB_MIDI_DEVICE_ANDROID_H_
   7
   8 #include <jni.h>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/android/scoped_java_ref.h"
  13 #include "base/basictypes.h"
  14 #include "base/callback.h"
  15 #include "media/midi/usb_midi_device.h"
  16 #include "media/midi/usb_midi_export.h"
  17
  18 namespace media {
  19 namespace midi {
  20
  21 class USB_MIDI_EXPORT UsbMidiDeviceAndroid : public UsbMidiDevice {
  22  public:
  23   typedef base::android::ScopedJavaLocalRef<jobject> ObjectRef;
  24
  25   static scoped_ptr<Factory> CreateFactory();
  26
  27   UsbMidiDeviceAndroid(ObjectRef raw_device, UsbMidiDeviceDelegate* delegate);
  28   ~UsbMidiDeviceAndroid() override;
  29
  30   // UsbMidiDevice implementation.
  31   std::vector<uint8> GetDescriptors() override;
  32   std::string GetManufacturer() override;
  33   std::string GetProductName() override;
  34   std::string GetDeviceVersion() override;
  35   void Send(int endpoint_number, const std::vector<uint8>& data) override;
  36
  37   // Called by the Java world.
  38   void OnData(JNIEnv* env,
  39               jobject caller,
  40               jint endpoint_number,
  41               jbyteArray data);
  42
  43   static bool RegisterUsbMidiDevice(JNIEnv* env);
  44
  45  private:
  46   void GetDescriptorsInternal();
  47   void InitDeviceInfo();
  48   std::vector<uint8> GetStringDescriptor(int index);
  49   std::string GetString(int index, const std::string& backup);
  50
  51   // The actual device object.
  52   base::android::ScopedJavaGlobalRef<jobject> raw_device_;
  53   UsbMidiDeviceDelegate* delegate_;
  54
  55   std::vector<uint8> descriptors_;
  56   std::string manufacturer_;
  57   std::string product_;
  58   std::string device_version_;
  59
  60   DISALLOW_IMPLICIT_CONSTRUCTORS(UsbMidiDeviceAndroid);
  61 };
  62
  63 }  // namespace midi
  64 }  // namespace media
  65
  66 #endif  // MEDIA_MIDI_USB_MIDI_DEVICE_ANDROID_H_