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