1 // Copyright (C) 2021 The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //      http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #pragma once
16 
17 #include <aidl/device/google/atv/audio_proxy/IOutputStream.h>
18 #include <fmq/AidlMessageQueue.h>
19 #include <fmq/EventFlag.h>
20 
21 #include "BusOutputStream.h"
22 
23 namespace audio_proxy {
24 namespace service {
25 
26 using aidl::android::hardware::common::fmq::MQDescriptor;
27 using aidl::android::hardware::common::fmq::SynchronizedReadWrite;
28 using aidl::device::google::atv::audio_proxy::IOutputStream;
29 using android::AidlMessageQueue;
30 using android::hardware::EventFlag;
31 
32 class RemoteBusOutputStream : public BusOutputStream {
33  public:
34   RemoteBusOutputStream(std::shared_ptr<IOutputStream> stream,
35                         const std::string& address,
36                         const AidlAudioConfig& config, int32_t flags);
37   ~RemoteBusOutputStream() override;
38 
39   bool standby() override;
40   bool pause() override;
41   bool resume() override;
42   bool drain(AidlAudioDrain drain) override;
43   bool flush() override;
44   bool close() override;
45   bool setVolume(float left, float right) override;
46 
47   size_t availableToWrite() override;
48   AidlWriteStatus writeRingBuffer(const uint8_t* firstMem, size_t firstLength,
49                                   const uint8_t* secondMem,
50                                   size_t secondLength) override;
51 
52   bool start() override;
53   bool stop() override;
54   AidlMmapBufferInfo createMmapBuffer(int32_t minBufferSizeFrames) override;
55   AidlPresentationPosition getMmapPosition() override;
56 
57  protected:
58   bool prepareForWritingImpl(uint32_t frameSize, uint32_t frameCount) override;
59 
60  private:
61   using DataMQ = AidlMessageQueue<int8_t, SynchronizedReadWrite>;
62   using DataMQDesc = MQDescriptor<int8_t, SynchronizedReadWrite>;
63   using StatusMQ = AidlMessageQueue<AidlWriteStatus, SynchronizedReadWrite>;
64   using StatusMQDesc = MQDescriptor<AidlWriteStatus, SynchronizedReadWrite>;
65 
66   typedef void (*EventFlagDeleter)(EventFlag*);
67 
68   std::shared_ptr<IOutputStream> mStream;
69 
70   std::unique_ptr<DataMQ> mDataMQ;
71   std::unique_ptr<StatusMQ> mStatusMQ;
72   std::unique_ptr<EventFlag, EventFlagDeleter> mEventFlag;
73 };
74 
75 }  // namespace service
76 }  // namespace audio_proxy