1 /* 2 * Copyright (C) 2016 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_AAUDIO_SERVICE_H 18 #define AAUDIO_AAUDIO_SERVICE_H 19 20 #include <time.h> 21 #include <pthread.h> 22 23 #include <binder/BinderService.h> 24 #include <media/AudioClient.h> 25 26 #include <aaudio/AAudio.h> 27 #include <aaudio/BnAAudioService.h> 28 29 #include "binding/AAudioCommon.h" 30 #include "binding/AAudioBinderAdapter.h" 31 #include "binding/AAudioServiceInterface.h" 32 33 #include "AAudioServiceStreamBase.h" 34 #include "AAudioStreamTracker.h" 35 36 namespace android { 37 38 #define AAUDIO_SERVICE_NAME "media.aaudio" 39 #define DEFAULT_AAUDIO_SERVICE_ID 0 40 41 class AAudioService : 42 public BinderService<AAudioService>, 43 public aaudio::BnAAudioService 44 { 45 friend class BinderService<AAudioService>; 46 47 public: 48 AAudioService(); 49 ~AAudioService() override = default; 50 asAAudioServiceInterface()51 aaudio::AAudioServiceInterface& asAAudioServiceInterface() { 52 return mAdapter; 53 } 54 getServiceName()55 static const char* getServiceName() { return AAUDIO_SERVICE_NAME; } 56 57 status_t dump(int fd, const Vector<String16>& args) override; 58 59 binder::Status registerClient(const ::android::sp<::aaudio::IAAudioClient>& client) override; 60 61 binder::Status openStream(const ::aaudio::StreamRequest& request, 62 ::aaudio::StreamParameters* paramsOut, 63 int32_t* _aidl_return) override; 64 65 binder::Status closeStream(int32_t streamHandle, int32_t* _aidl_return) override; 66 67 binder::Status 68 getStreamDescription(int32_t streamHandle, ::aaudio::Endpoint* endpoint, 69 int32_t* _aidl_return) override; 70 71 binder::Status startStream(int32_t streamHandle, int32_t* _aidl_return) override; 72 73 binder::Status pauseStream(int32_t streamHandle, int32_t* _aidl_return) override; 74 75 binder::Status stopStream(int32_t streamHandle, int32_t* _aidl_return) override; 76 77 binder::Status flushStream(int32_t streamHandle, int32_t* _aidl_return) override; 78 79 binder::Status 80 registerAudioThread(int32_t streamHandle, int32_t clientThreadId, int64_t periodNanoseconds, 81 int32_t* _aidl_return) override; 82 83 binder::Status unregisterAudioThread(int32_t streamHandle, int32_t clientThreadId, 84 int32_t* _aidl_return) override; 85 86 binder::Status exitStandby(int32_t streamHandle, ::aaudio::Endpoint* endpoint, 87 int32_t* _aidl_return) override; 88 89 aaudio_result_t startClient(aaudio::aaudio_handle_t streamHandle, 90 const android::AudioClient& client, 91 const audio_attributes_t *attr, 92 audio_port_handle_t *clientHandle); 93 94 aaudio_result_t stopClient(aaudio::aaudio_handle_t streamHandle, 95 audio_port_handle_t clientHandle); 96 97 // =============================================================================== 98 // The following public methods are only called from the service and NOT by Binder. 99 // =============================================================================== 100 101 aaudio_result_t disconnectStreamByPortHandle(audio_port_handle_t portHandle); 102 103 /* 104 * This is only called from within the Service. 105 * It bypasses the permission checks in closeStream(handle). 106 */ 107 aaudio_result_t closeStream(const sp<aaudio::AAudioServiceStreamBase>& serviceStream); 108 109 private: 110 class Adapter : public aaudio::AAudioBinderAdapter { 111 public: 112 // Always use default service id in server side since when crash happens, 113 // the aaudio service will restart. Adapter(AAudioService * service)114 explicit Adapter(AAudioService *service) 115 : aaudio::AAudioBinderAdapter(service, DEFAULT_AAUDIO_SERVICE_ID), 116 mService(service) {} 117 startClient(const aaudio::AAudioHandleInfo & streamHandleInfo,const android::AudioClient & client,const audio_attributes_t * attr,audio_port_handle_t * clientHandle)118 aaudio_result_t startClient(const aaudio::AAudioHandleInfo& streamHandleInfo, 119 const android::AudioClient &client, 120 const audio_attributes_t *attr, 121 audio_port_handle_t *clientHandle) override { 122 return mService->startClient(streamHandleInfo.getHandle(), client, attr, clientHandle); 123 } 124 stopClient(const aaudio::AAudioHandleInfo & streamHandleInfo,audio_port_handle_t clientHandle)125 aaudio_result_t stopClient(const aaudio::AAudioHandleInfo& streamHandleInfo, 126 audio_port_handle_t clientHandle) override { 127 return mService->stopClient(streamHandleInfo.getHandle(), clientHandle); 128 } 129 130 private: 131 AAudioService* const mService; 132 }; 133 134 Adapter mAdapter; 135 136 /** @return true if the client is the audioserver 137 */ 138 bool isCallerInService(); 139 140 /** 141 * Lookup stream and then validate access to the stream. 142 * @param streamHandle 143 * @return 144 */ 145 sp<aaudio::AAudioServiceStreamBase> convertHandleToServiceStream( 146 aaudio::aaudio_handle_t streamHandle); 147 148 android::AudioClient mAudioClient; 149 150 aaudio::AAudioStreamTracker mStreamTracker; 151 152 // We use a lock to prevent thread A from reopening an exclusive stream 153 // after thread B steals thread A's exclusive MMAP resource stream. 154 std::recursive_mutex mOpenLock; 155 156 // TODO Extract the priority constants from services/audioflinger/Threads.cpp 157 // and share them with this code. Look for "kPriorityFastMixer". 158 static constexpr int32_t kRealTimeAudioPriorityClient = 2; 159 static constexpr int32_t kRealTimeAudioPriorityService = 3; 160 161 }; 162 163 } /* namespace android */ 164 165 #endif //AAUDIO_AAUDIO_SERVICE_H 166