1 /*
2  * Copyright (C) 2017 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_SERVERS_CAMERA3_STREAMBUFFERFREEDLISTENER_H
18 #define ANDROID_SERVERS_CAMERA3_STREAMBUFFERFREEDLISTENER_H
19 
20 #include <gui/Surface.h>
21 #include <utils/RefBase.h>
22 
23 namespace android {
24 
25 namespace camera3 {
26 
27 class Camera3StreamBufferFreedListener : public virtual RefBase {
28 public:
29     // onBufferFreed is called when a buffer is no longer being managed
30     // by this stream. This will not be called in events when all
31     // buffers are freed due to stream disconnection.
32     //
33     // The input handle may be deleted after this callback ends, so attempting
34     // to dereference handle post this callback is illegal and might lead to
35     // crash.
36     //
37     // This callback will be called while holding Camera3Stream's lock, so
38     // calling into other Camera3Stream APIs within this callback will
39     // lead to deadlock.
40     virtual void onBufferFreed(int streamId, const native_handle_t* handle) = 0;
41 
~Camera3StreamBufferFreedListener()42     virtual ~Camera3StreamBufferFreedListener() {}
43 };
44 
45 }; //namespace camera3
46 }; //namespace android
47 
48 #endif
49