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/base/media_export.h"
  16 #include "media/midi/usb_midi_device.h"
  17
  18 namespace media {
  19
  20 class MEDIA_EXPORT UsbMidiDeviceAndroid : public UsbMidiDevice {
  21  public:
  22   typedef base::android::ScopedJavaLocalRef<jobject> ObjectRef;
  23
  24   static scoped_ptr<Factory> CreateFactory();
  25
  26   UsbMidiDeviceAndroid(ObjectRef raw_device, UsbMidiDeviceDelegate* delegate);
  27   ~UsbMidiDeviceAndroid() override;
  28
  29   // UsbMidiDevice implementation.
  30   std::vector<uint8> GetDescriptors() override;
  31   std::string GetManufacturer() override;
  32   std::string GetProductName() override;
  33   std::string GetDeviceVersion() override;
  34   void Send(int endpoint_number, const std::vector<uint8>& data) override;
  35
  36   // Called by the Java world.
  37   void OnData(JNIEnv* env,
  38               jobject caller,
  39               jint endpoint_number,
  40               jbyteArray data);
  41
  42   static bool RegisterUsbMidiDevice(JNIEnv* env);
  43
  44  private:
  45   void GetDescriptorsInternal();
  46   void InitDeviceInfo();
  47   std::vector<uint8> GetStringDescriptor(int index);
  48   std::string GetString(int index, const std::string& backup);
  49
  50   // The actual device object.
  51   base::android::ScopedJavaGlobalRef<jobject> raw_device_;
  52   UsbMidiDeviceDelegate* delegate_;
  53
  54   std::vector<uint8> descriptors_;
  55   std::string manufacturer_;
  56   std::string product_;
  57   std::string device_version_;
  58
  59   DISALLOW_IMPLICIT_CONSTRUCTORS(UsbMidiDeviceAndroid);
  60 };
  61
  62 }  // namespace media
  63
  64 #endif  // MEDIA_MIDI_USB_MIDI_DEVICE_ANDROID_H_