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 ANDROID_AAUDIO_AAUDIO_BINDER_CLIENT_H 18 #define ANDROID_AAUDIO_AAUDIO_BINDER_CLIENT_H 19 20 #include <utils/RefBase.h> 21 #include <utils/Singleton.h> 22 23 #include <aaudio/AAudio.h> 24 #include "AAudioServiceDefinitions.h" 25 #include "AAudioServiceInterface.h" 26 #include "binding/AAudioStreamRequest.h" 27 #include "binding/AAudioStreamConfiguration.h" 28 #include "binding/AudioEndpointParcelable.h" 29 #include "binding/IAAudioService.h" 30 31 /** 32 * Implements the AAudioServiceInterface by talking to the service through Binder. 33 */ 34 35 namespace aaudio { 36 37 class AAudioBinderClient : public virtual android::RefBase 38 , public AAudioServiceInterface 39 , public android::Singleton<AAudioBinderClient> { 40 41 public: 42 43 AAudioBinderClient(); 44 45 virtual ~AAudioBinderClient(); 46 47 const android::sp<android::IAAudioService> getAAudioService(); 48 49 void dropAAudioService(); 50 registerClient(const android::sp<android::IAAudioClient> & client __unused)51 void registerClient(const android::sp<android::IAAudioClient>& client __unused) override {} 52 53 /** 54 * @param request info needed to create the stream 55 * @param configuration contains resulting information about the created stream 56 * @return handle to the stream or a negative error 57 */ 58 aaudio_handle_t openStream(const AAudioStreamRequest &request, 59 AAudioStreamConfiguration &configurationOutput) override; 60 61 aaudio_result_t closeStream(aaudio_handle_t streamHandle) override; 62 63 /* Get an immutable description of the in-memory queues 64 * used to communicate with the underlying HAL or Service. 65 */ 66 aaudio_result_t getStreamDescription(aaudio_handle_t streamHandle, 67 AudioEndpointParcelable &parcelable) override; 68 69 /** 70 * Start the flow of data. 71 * This is asynchronous. When complete, the service will send a STARTED event. 72 */ 73 aaudio_result_t startStream(aaudio_handle_t streamHandle) override; 74 75 /** 76 * Stop the flow of data such that start() can resume without loss of data. 77 * This is asynchronous. When complete, the service will send a PAUSED event. 78 */ 79 aaudio_result_t pauseStream(aaudio_handle_t streamHandle) override; 80 81 aaudio_result_t stopStream(aaudio_handle_t streamHandle) override; 82 83 /** 84 * Discard any data held by the underlying HAL or Service. 85 * This is asynchronous. When complete, the service will send a FLUSHED event. 86 */ 87 aaudio_result_t flushStream(aaudio_handle_t streamHandle) override; 88 89 /** 90 * Manage the specified thread as a low latency audio thread. 91 * TODO Consider passing this information as part of the startStream() call. 92 */ 93 aaudio_result_t registerAudioThread(aaudio_handle_t streamHandle, 94 pid_t clientThreadId, 95 int64_t periodNanoseconds) override; 96 97 aaudio_result_t unregisterAudioThread(aaudio_handle_t streamHandle, 98 pid_t clientThreadId) override; 99 startClient(aaudio_handle_t streamHandle __unused,const android::AudioClient & client __unused,const audio_attributes_t * attr __unused,audio_port_handle_t * clientHandle __unused)100 aaudio_result_t startClient(aaudio_handle_t streamHandle __unused, 101 const android::AudioClient& client __unused, 102 const audio_attributes_t *attr __unused, 103 audio_port_handle_t *clientHandle __unused) override { 104 return AAUDIO_ERROR_UNAVAILABLE; 105 } 106 stopClient(aaudio_handle_t streamHandle __unused,audio_port_handle_t clientHandle __unused)107 aaudio_result_t stopClient(aaudio_handle_t streamHandle __unused, 108 audio_port_handle_t clientHandle __unused) override { 109 return AAUDIO_ERROR_UNAVAILABLE; 110 } 111 onStreamChange(aaudio_handle_t handle,int32_t opcode,int32_t value)112 void onStreamChange(aaudio_handle_t handle, int32_t opcode, int32_t value) { 113 // TODO This is just a stub so we can have a client Binder to pass to the service. 114 // TODO Implemented in a later CL. 115 ALOGW("onStreamChange called!"); 116 } 117 118 class AAudioClient : public android::IBinder::DeathRecipient , public android::BnAAudioClient 119 { 120 public: AAudioClient(android::wp<AAudioBinderClient> aaudioBinderClient)121 AAudioClient(android::wp<AAudioBinderClient> aaudioBinderClient) 122 : mBinderClient(aaudioBinderClient) { 123 } 124 125 // implement DeathRecipient binderDied(const android::wp<android::IBinder> & who __unused)126 virtual void binderDied(const android::wp<android::IBinder>& who __unused) { 127 android::sp<AAudioBinderClient> client = mBinderClient.promote(); 128 if (client.get() != nullptr) { 129 client->dropAAudioService(); 130 } 131 ALOGW("AAudio service binderDied()!"); 132 } 133 134 // implement BnAAudioClient onStreamChange(aaudio_handle_t handle,int32_t opcode,int32_t value)135 void onStreamChange(aaudio_handle_t handle, int32_t opcode, int32_t value) { 136 android::sp<AAudioBinderClient> client = mBinderClient.promote(); 137 if (client.get() != nullptr) { 138 client->onStreamChange(handle, opcode, value); 139 } 140 } 141 private: 142 android::wp<AAudioBinderClient> mBinderClient; 143 }; 144 145 private: 146 147 android::Mutex mServiceLock; 148 android::sp<android::IAAudioService> mAAudioService; 149 android::sp<AAudioClient> mAAudioClient; 150 151 }; 152 153 154 } /* namespace aaudio */ 155 156 #endif //ANDROID_AAUDIO_AAUDIO_BINDER_CLIENT_H 157