| // Copyright 2014 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/usb_midi_device_factory_android.h" |
| |
| #include <stddef.h> |
| #include <memory> |
| |
| #include "base/bind.h" |
| #include "base/synchronization/lock.h" |
| #include "media/midi/midi_jni_headers/UsbMidiDeviceFactoryAndroid_jni.h" |
| #include "media/midi/usb_midi_device_android.h" |
| |
| using base::android::JavaParamRef; |
| |
| namespace midi { |
| |
| namespace { |
| |
| using Callback = UsbMidiDevice::Factory::Callback; |
| |
| } // namespace |
| |
| UsbMidiDeviceFactoryAndroid::UsbMidiDeviceFactoryAndroid() |
| : delegate_(nullptr) {} |
| |
| UsbMidiDeviceFactoryAndroid::~UsbMidiDeviceFactoryAndroid() { |
| JNIEnv* env = base::android::AttachCurrentThread(); |
| if (!raw_factory_.is_null()) |
| Java_UsbMidiDeviceFactoryAndroid_close(env, raw_factory_); |
| } |
| |
| void UsbMidiDeviceFactoryAndroid::EnumerateDevices( |
| UsbMidiDeviceDelegate* delegate, |
| Callback callback) { |
| DCHECK(!delegate_); |
| JNIEnv* env = base::android::AttachCurrentThread(); |
| uintptr_t pointer = reinterpret_cast<uintptr_t>(this); |
| raw_factory_.Reset(Java_UsbMidiDeviceFactoryAndroid_create(env, pointer)); |
| |
| delegate_ = delegate; |
| callback_ = std::move(callback); |
| |
| if (Java_UsbMidiDeviceFactoryAndroid_enumerateDevices(env, raw_factory_)) { |
| // Asynchronous operation. |
| return; |
| } |
| // No devices are found. |
| UsbMidiDevice::Devices devices; |
| std::move(callback_).Run(true, &devices); |
| } |
| |
| // Called from the Java world. |
| void UsbMidiDeviceFactoryAndroid::OnUsbMidiDeviceRequestDone( |
| JNIEnv* env, |
| const JavaParamRef<jobjectArray>& devices) { |
| UsbMidiDevice::Devices devices_to_pass; |
| for (auto raw_device : devices.ReadElements<jobject>()) { |
| devices_to_pass.push_back( |
| std::make_unique<UsbMidiDeviceAndroid>(raw_device, delegate_)); |
| } |
| |
| std::move(callback_).Run(true, &devices_to_pass); |
| } |
| |
| // Called from the Java world. |
| void UsbMidiDeviceFactoryAndroid::OnUsbMidiDeviceAttached( |
| JNIEnv* env, |
| const JavaParamRef<jobject>& device) { |
| delegate_->OnDeviceAttached( |
| std::make_unique<UsbMidiDeviceAndroid>(device, delegate_)); |
| } |
| |
| // Called from the Java world. |
| void UsbMidiDeviceFactoryAndroid::OnUsbMidiDeviceDetached( |
| JNIEnv* env, |
| jint index) { |
| delegate_->OnDeviceDetached(index); |
| } |
| |
| } // namespace midi |