1 /*
2  * Copyright (C) 2015 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 #ifndef ANDROID_MEDIA_DEVICE_CALLBACK_H
18 #define ANDROID_MEDIA_DEVICE_CALLBACK_H
19 
20 #include <system/audio.h>
21 #include <media/AudioSystem.h>
22 
23 namespace android {
24 
25 // keep in sync with AudioSystem.java
26 #define AUDIO_NATIVE_EVENT_ROUTING_CHANGE      1000
27 
28 class JNIDeviceCallback: public AudioSystem::AudioDeviceCallback
29 {
30 public:
31     JNIDeviceCallback(JNIEnv* env, jobject thiz, jobject weak_thiz, jmethodID postEventFromNative);
32     ~JNIDeviceCallback();
33 
34     virtual void onAudioDeviceUpdate(audio_io_handle_t audioIo,
35                                      audio_port_handle_t deviceId);
36 
37 private:
38     void sendEvent(int event);
39 
40     jclass      mClass;     // Reference to AudioTrack/AudioRecord class
41     jobject     mObject;    // Weak ref to AudioTrack/AudioRecord Java object to call on
42     jmethodID   mPostEventFromNative; // postEventFromNative method ID.
43 };
44 
45 }; // namespace android
46 
47 #endif // ANDROID_MEDIA_DEVICE_CALLBACK_H
48