1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "NativeMIDI_JNI" 18 19 #include <core_jni_helpers.h> 20 21 namespace android { namespace midi { 22 // MidiDevice Fields 23 static jobject gMidiDeviceClassGlobalRef = nullptr; // A GlobalRef for MidiDevice Class 24 jfieldID gFidMidiNativeHandle = nullptr; // MidiDevice.mNativeHandle 25 jfieldID gFidMidiDeviceServerBinder = nullptr; // MidiDevice.mDeviceServerBinder 26 jfieldID gFidMidiDeviceInfo = nullptr; // MidiDevice.mDeviceInfo 27 28 // MidiDeviceInfo Fields 29 static jobject gMidiDeviceInfoClassGlobalRef = nullptr; // A GlobalRef for MidiDeviceInfoClass 30 jfieldID mFidMidiDeviceId = nullptr; // MidiDeviceInfo.mId 31 }} 32 33 using namespace android::midi; 34 35 int register_android_media_midi(JNIEnv *env) { 36 jclass deviceClass = android::FindClassOrDie(env, "android/media/midi/MidiDevice"); 37 gMidiDeviceClassGlobalRef = env->NewGlobalRef(deviceClass); 38 39 // MidiDevice Field IDs 40 gFidMidiNativeHandle = android::GetFieldIDOrDie(env, deviceClass, "mNativeHandle", "J"); 41 gFidMidiDeviceServerBinder = android::GetFieldIDOrDie(env, deviceClass, 42 "mDeviceServerBinder", "Landroid/os/IBinder;"); 43 gFidMidiDeviceInfo = android::GetFieldIDOrDie(env, deviceClass, 44 "mDeviceInfo", "Landroid/media/midi/MidiDeviceInfo;"); 45 46 // MidiDeviceInfo Field IDs 47 jclass deviceInfoClass = android::FindClassOrDie(env, "android/media/midi/MidiDeviceInfo"); 48 gMidiDeviceInfoClassGlobalRef = env->NewGlobalRef(deviceInfoClass); 49 mFidMidiDeviceId = android::GetFieldIDOrDie(env, deviceInfoClass, "mId", "I"); 50 51 return 0; 52 } 53