media/midi/usb_midi_device_android.cc

   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 #include "media/midi/usb_midi_device_android.h"
   6
   7 #include <jni.h>
   8 #include <vector>
   9
  10 #include "base/android/jni_array.h"
  11 #include "base/time/time.h"
  12 #include "jni/UsbMidiDeviceAndroid_jni.h"
  13
  14 namespace media {
  15
  16 UsbMidiDeviceAndroid::UsbMidiDeviceAndroid(ObjectRef raw_device,
  17                                            UsbMidiDeviceDelegate* delegate)
  18     : raw_device_(raw_device), delegate_(delegate) {
  19   JNIEnv* env = base::android::AttachCurrentThread();
  20   Java_UsbMidiDeviceAndroid_registerSelf(
  21       env, raw_device_.obj(), reinterpret_cast<jlong>(this));
  22 }
  23
  24 UsbMidiDeviceAndroid::~UsbMidiDeviceAndroid() {
  25   JNIEnv* env = base::android::AttachCurrentThread();
  26   Java_UsbMidiDeviceAndroid_close(env, raw_device_.obj());
  27 }
  28
  29 std::vector<uint8> UsbMidiDeviceAndroid::GetDescriptor() {
  30   JNIEnv* env = base::android::AttachCurrentThread();
  31   base::android::ScopedJavaLocalRef<jbyteArray> descriptors =
  32       Java_UsbMidiDeviceAndroid_getDescriptors(env, raw_device_.obj());
  33
  34   std::vector<uint8> ret;
  35   base::android::JavaByteArrayToByteVector(env, descriptors.obj(), &ret);
  36   return ret;
  37 }
  38
  39 void UsbMidiDeviceAndroid::Send(int endpoint_number,
  40                                 const std::vector<uint8>& data) {
  41   JNIEnv* env = base::android::AttachCurrentThread();
  42   const uint8* head = data.size() ? &data[0] : NULL;
  43   ScopedJavaLocalRef<jbyteArray> data_to_pass =
  44       base::android::ToJavaByteArray(env, head, data.size());
  45
  46   Java_UsbMidiDeviceAndroid_send(
  47       env, raw_device_.obj(), endpoint_number, data_to_pass.obj());
  48 }
  49
  50 void UsbMidiDeviceAndroid::OnData(JNIEnv* env,
  51                                   jobject caller,
  52                                   jint endpoint_number,
  53                                   jbyteArray data) {
  54   std::vector<uint8> bytes;
  55   base::android::JavaByteArrayToByteVector(env, data, &bytes);
  56
  57   const uint8* head = bytes.size() ? &bytes[0] : NULL;
  58   delegate_->ReceiveUsbMidiData(this, endpoint_number, head, bytes.size(),
  59                                 base::TimeTicks::Now());
  60 }
  61
  62 bool UsbMidiDeviceAndroid::RegisterUsbMidiDevice(JNIEnv* env) {
  63   return RegisterNativesImpl(env);
  64 }
  65
  66 }  // namespace media