| /* |
| * Copyright 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef NATIVEOBOE_SAWPINGGENERATOR_H |
| #define NATIVEOBOE_SAWPINGGENERATOR_H |
| |
| #include <atomic> |
| #include <unistd.h> |
| #include <sys/types.h> |
| |
| #include "flowgraph/AudioProcessorBase.h" |
| #include "flowgraph/OscillatorBase.h" |
| |
| class SawPingGenerator : public OscillatorBase { |
| public: |
| SawPingGenerator(); |
| |
| virtual ~SawPingGenerator(); |
| |
| int32_t onProcess( |
| int64_t framePosition, |
| int numFrames) override; |
| |
| void setEnabled(bool enabled); |
| |
| void start() override { |
| OscillatorBase::start(); |
| mAcknowledgeCount.store(mRequestCount.load()); |
| } |
| |
| private: |
| std::atomic<int> mRequestCount; // external thread increments this to request a beep |
| std::atomic<int> mAcknowledgeCount; // audio thread sets this to acknowledge |
| double mLevel; |
| }; |
| |
| |
| #endif //NATIVEOBOE_SAWPINGGENERATOR_H |