Phil Burk | 7f6b40d | 2017-02-09 13:18:38 -0800 | [diff] [blame^] | 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 | |
| 18 | #define LOG_TAG "AAudio" |
| 19 | //#define LOG_NDEBUG 0 |
| 20 | #include <utils/Log.h> |
| 21 | |
| 22 | #include <binder/IServiceManager.h> |
| 23 | #include <utils/Mutex.h> |
| 24 | #include <utils/RefBase.h> |
| 25 | |
| 26 | #include <aaudio/AAudio.h> |
| 27 | |
| 28 | #include "AudioEndpointParcelable.h" |
| 29 | #include "binding/AAudioStreamRequest.h" |
| 30 | #include "binding/AAudioStreamConfiguration.h" |
| 31 | #include "binding/IAAudioService.h" |
| 32 | #include "binding/AAudioServiceMessage.h" |
| 33 | |
| 34 | #include "AAudioBinderClient.h" |
| 35 | #include "AAudioServiceInterface.h" |
| 36 | |
| 37 | using android::String16; |
| 38 | using android::IServiceManager; |
| 39 | using android::defaultServiceManager; |
| 40 | using android::interface_cast; |
| 41 | using android::IAAudioService; |
| 42 | using android::Mutex; |
| 43 | using android::sp; |
| 44 | |
| 45 | using namespace aaudio; |
| 46 | |
| 47 | static android::Mutex gServiceLock; |
| 48 | static sp<IAAudioService> gAAudioService; |
| 49 | |
| 50 | // TODO Share code with other service clients. |
| 51 | // Helper function to get access to the "AAudioService" service. |
| 52 | // This code was modeled after frameworks/av/media/libaudioclient/AudioSystem.cpp |
| 53 | static const sp<IAAudioService> getAAudioService() { |
| 54 | sp<IBinder> binder; |
| 55 | Mutex::Autolock _l(gServiceLock); |
| 56 | if (gAAudioService == 0) { |
| 57 | sp<IServiceManager> sm = defaultServiceManager(); |
| 58 | // Try several times to get the service. |
| 59 | int retries = 4; |
| 60 | do { |
| 61 | binder = sm->getService(String16(AAUDIO_SERVICE_NAME)); // This will wait a while. |
| 62 | if (binder != 0) { |
| 63 | break; |
| 64 | } |
| 65 | } while (retries-- > 0); |
| 66 | |
| 67 | if (binder != 0) { |
| 68 | // TODO Add linkToDeath() like in frameworks/av/media/libaudioclient/AudioSystem.cpp |
| 69 | // TODO Create a DeathRecipient that disconnects all active streams. |
| 70 | gAAudioService = interface_cast<IAAudioService>(binder); |
| 71 | } else { |
| 72 | ALOGE("AudioStreamInternal could not get %s", AAUDIO_SERVICE_NAME); |
| 73 | } |
| 74 | } |
| 75 | return gAAudioService; |
| 76 | } |
| 77 | |
| 78 | |
| 79 | AAudioBinderClient::AAudioBinderClient() |
| 80 | : AAudioServiceInterface() {} |
| 81 | |
| 82 | AAudioBinderClient::~AAudioBinderClient() {} |
| 83 | |
| 84 | /** |
| 85 | * @param request info needed to create the stream |
| 86 | * @param configuration contains information about the created stream |
| 87 | * @return handle to the stream or a negative error |
| 88 | */ |
| 89 | aaudio_handle_t AAudioBinderClient::openStream(const AAudioStreamRequest &request, |
| 90 | AAudioStreamConfiguration &configurationOutput) { |
| 91 | |
| 92 | const sp<IAAudioService> &service = getAAudioService(); |
| 93 | if (service == 0) return AAUDIO_ERROR_NO_SERVICE; |
| 94 | return service->openStream(request, configurationOutput); |
| 95 | } |
| 96 | |
| 97 | aaudio_result_t AAudioBinderClient::closeStream(aaudio_handle_t streamHandle) { |
| 98 | |
| 99 | const sp<IAAudioService> &service = getAAudioService(); |
| 100 | if (service == 0) return AAUDIO_ERROR_NO_SERVICE; |
| 101 | return service->closeStream(streamHandle); |
| 102 | } |
| 103 | |
| 104 | /* Get an immutable description of the in-memory queues |
| 105 | * used to communicate with the underlying HAL or Service. |
| 106 | */ |
| 107 | aaudio_result_t AAudioBinderClient::getStreamDescription(aaudio_handle_t streamHandle, |
| 108 | AudioEndpointParcelable &parcelable) { |
| 109 | |
| 110 | const sp<IAAudioService> &service = getAAudioService(); |
| 111 | if (service == 0) return AAUDIO_ERROR_NO_SERVICE; |
| 112 | return service->getStreamDescription(streamHandle, parcelable); |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * Start the flow of data. |
| 117 | */ |
| 118 | aaudio_result_t AAudioBinderClient::startStream(aaudio_handle_t streamHandle) { |
| 119 | const sp<IAAudioService> &service = getAAudioService(); |
| 120 | if (service == 0) return AAUDIO_ERROR_NO_SERVICE; |
| 121 | return service->startStream(streamHandle); |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Stop the flow of data such that start() can resume without loss of data. |
| 126 | */ |
| 127 | aaudio_result_t AAudioBinderClient::pauseStream(aaudio_handle_t streamHandle) { |
| 128 | const sp<IAAudioService> &service = getAAudioService(); |
| 129 | if (service == 0) return AAUDIO_ERROR_NO_SERVICE; |
| 130 | return service->startStream(streamHandle); |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Discard any data held by the underlying HAL or Service. |
| 135 | */ |
| 136 | aaudio_result_t AAudioBinderClient::flushStream(aaudio_handle_t streamHandle) { |
| 137 | const sp<IAAudioService> &service = getAAudioService(); |
| 138 | if (service == 0) return AAUDIO_ERROR_NO_SERVICE; |
| 139 | return service->startStream(streamHandle); |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * Manage the specified thread as a low latency audio thread. |
| 144 | */ |
| 145 | aaudio_result_t AAudioBinderClient::registerAudioThread(aaudio_handle_t streamHandle, |
| 146 | pid_t clientProcessId, |
| 147 | pid_t clientThreadId, |
| 148 | int64_t periodNanoseconds) { |
| 149 | const sp<IAAudioService> &service = getAAudioService(); |
| 150 | if (service == 0) return AAUDIO_ERROR_NO_SERVICE; |
| 151 | return service->registerAudioThread(streamHandle, |
| 152 | clientProcessId, |
| 153 | clientThreadId, |
| 154 | periodNanoseconds); |
| 155 | } |
| 156 | |
| 157 | aaudio_result_t AAudioBinderClient::unregisterAudioThread(aaudio_handle_t streamHandle, |
| 158 | pid_t clientProcessId, |
| 159 | pid_t clientThreadId) { |
| 160 | const sp<IAAudioService> &service = getAAudioService(); |
| 161 | if (service == 0) return AAUDIO_ERROR_NO_SERVICE; |
| 162 | return service->unregisterAudioThread(streamHandle, |
| 163 | clientProcessId, |
| 164 | clientThreadId); |
| 165 | } |
| 166 | |
| 167 | |