1 /* 2 * Copyright (C) 2023 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 #pragma once 18 19 #include <any> 20 #include <functional> 21 #include <mutex> 22 23 #include <media/AudioSystem.h> 24 #include <utils/RefBase.h> 25 26 namespace android::audioflinger { 27 28 class SyncEvent; 29 using SyncEventCallback = std::function<void(const wp<SyncEvent>& event)>; 30 31 class SyncEvent : public RefBase { 32 public: SyncEvent(AudioSystem::sync_event_t type,audio_session_t triggerSession,audio_session_t listenerSession,const SyncEventCallback & callBack,const std::any & cookie)33 SyncEvent(AudioSystem::sync_event_t type, 34 audio_session_t triggerSession, 35 audio_session_t listenerSession, 36 const SyncEventCallback& callBack, 37 const std::any& cookie) 38 : mType(type), mTriggerSession(triggerSession), mListenerSession(listenerSession), 39 mCookie(cookie), mCallback(callBack) 40 {} 41 trigger()42 void trigger() { 43 std::lock_guard l(mLock); 44 if (mCallback) mCallback(wp<SyncEvent>::fromExisting(this)); 45 } 46 isCancelled()47 bool isCancelled() const { 48 std::lock_guard l(mLock); 49 return mCallback == nullptr; 50 } 51 cancel()52 void cancel() { 53 std::lock_guard l(mLock); 54 mCallback = nullptr; 55 } 56 type()57 AudioSystem::sync_event_t type() const { return mType; } triggerSession()58 audio_session_t triggerSession() const { return mTriggerSession; } listenerSession()59 audio_session_t listenerSession() const { return mListenerSession; } cookie()60 const std::any& cookie() const { return mCookie; } 61 62 private: 63 const AudioSystem::sync_event_t mType; 64 const audio_session_t mTriggerSession; 65 const audio_session_t mListenerSession; 66 const std::any mCookie; 67 mutable std::mutex mLock; 68 SyncEventCallback mCallback GUARDED_BY(mLock); 69 }; 70 71 } // namespace android::audioflinger 72