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 AAUDIO_SERVICE_ENDPOINT_SHARED_H 18 #define AAUDIO_SERVICE_ENDPOINT_SHARED_H 19 20 #include <atomic> 21 #include <mutex> 22 23 #include <android-base/thread_annotations.h> 24 25 #include "AAudioServiceEndpoint.h" 26 #include "client/AudioStreamInternal.h" 27 #include "client/AudioStreamInternalPlay.h" 28 #include "AAudioServiceStreamShared.h" 29 #include "AAudioServiceStreamMMAP.h" 30 #include "AAudioService.h" 31 32 namespace aaudio { 33 34 /** 35 * This manages an AudioStreamInternal that is shared by multiple Client streams. 36 */ 37 class AAudioServiceEndpointShared : public AAudioServiceEndpoint { 38 39 public: 40 explicit AAudioServiceEndpointShared(AudioStreamInternal *streamInternal); 41 42 virtual ~AAudioServiceEndpointShared() = default; 43 44 std::string dump() const override; 45 46 aaudio_result_t open(const aaudio::AAudioStreamRequest &request) override; 47 48 void close() override; 49 50 aaudio_result_t startStream(android::sp<AAudioServiceStreamBase> stream, 51 audio_port_handle_t *clientHandle) override; 52 53 aaudio_result_t stopStream(android::sp<AAudioServiceStreamBase> stream, 54 audio_port_handle_t clientHandle) override; 55 56 aaudio_result_t getFreeRunningPosition(int64_t *positionFrames, int64_t *timeNanos) override; 57 58 aaudio_result_t getTimestamp(int64_t *positionFrames, int64_t *timeNanos) override; 59 60 virtual void *callbackLoop() = 0; 61 getStreamInternal()62 AudioStreamInternal *getStreamInternal() const { 63 return mStreamInternal.get(); 64 }; 65 66 protected: 67 68 aaudio_result_t startSharingThread_l() REQUIRES(mLockStreams); 69 70 aaudio_result_t stopSharingThread(); 71 72 // An MMAP stream that is shared by multiple clients. 73 android::sp<AudioStreamInternal> mStreamInternal; 74 75 std::atomic<bool> mCallbackEnabled{false}; 76 77 std::atomic<int> mRunningStreamCount{0}; 78 }; 79 80 } 81 82 #endif //AAUDIO_SERVICE_ENDPOINT_SHARED_H 83