Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019 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 | #include <hidl/HidlTransportSupport.h> |
| 17 | #include <log/log.h> |
| 18 | #include <utils/SystemClock.h> |
| 19 | |
| 20 | #include "DisplayUseCase.h" |
| 21 | #include "RenderDirectView.h" |
Haoxiang Li | 11f58a8 | 2019-08-30 14:50:06 -0700 | [diff] [blame] | 22 | #include "Utils.h" |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 23 | |
| 24 | namespace android { |
| 25 | namespace automotive { |
| 26 | namespace evs { |
| 27 | namespace support { |
| 28 | |
| 29 | using android::hardware::configureRpcThreadpool; |
| 30 | using android::hardware::joinRpcThreadpool; |
| 31 | |
| 32 | // TODO(b/130246434): since we don't support multi-display use case, there |
| 33 | // should only be one DisplayUseCase. Add the logic to prevent more than |
| 34 | // one DisplayUseCases running at the same time. |
Haoxiang Li | 31ae4ed | 2019-09-06 16:35:09 -0700 | [diff] [blame] | 35 | DisplayUseCase::DisplayUseCase(string cameraId, BaseRenderCallback* callback) |
| 36 | : BaseUseCase(vector<string>(1, cameraId)) { |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 37 | mRenderCallback = callback; |
| 38 | } |
| 39 | |
| 40 | DisplayUseCase::~DisplayUseCase() { |
| 41 | if (mCurrentRenderer != nullptr) { |
| 42 | mCurrentRenderer->deactivate(); |
| 43 | mCurrentRenderer = nullptr; // It's a smart pointer, so destructs on assignment to null |
| 44 | } |
| 45 | |
| 46 | mIsReadyToRun = false; |
| 47 | if (mWorkerThread.joinable()) { |
| 48 | mWorkerThread.join(); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | bool DisplayUseCase::initialize() { |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 53 | // Load our configuration information |
| 54 | ConfigManager config; |
| 55 | if (!config.initialize("/system/etc/automotive/evs_support_lib/camera_config.json")) { |
| 56 | ALOGE("Missing or improper configuration for the EVS application. Exiting."); |
| 57 | return false; |
| 58 | } |
| 59 | |
| 60 | // Set thread pool size to one to avoid concurrent events from the HAL. |
| 61 | // This pool will handle the EvsCameraStream callbacks. |
| 62 | // Note: This _will_ run in parallel with the EvsListener run() loop below which |
| 63 | // runs the application logic that reacts to the async events. |
| 64 | configureRpcThreadpool(1, false /* callerWillJoin */); |
| 65 | |
Haoxiang Li | c888859 | 2019-09-19 16:39:53 -0700 | [diff] [blame] | 66 | mResourceManager = ResourceManager::getInstance(); |
| 67 | if (mResourceManager == nullptr) { |
| 68 | ALOGE("Failed to get resource manager instance. Initialization failed."); |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 69 | return false; |
| 70 | } |
| 71 | |
| 72 | // Request exclusive access to the EVS display |
| 73 | ALOGI("Acquiring EVS Display"); |
| 74 | |
Haoxiang Li | c888859 | 2019-09-19 16:39:53 -0700 | [diff] [blame] | 75 | mDisplay = mResourceManager->openDisplay(); |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 76 | if (mDisplay.get() == nullptr) { |
| 77 | ALOGE("EVS Display unavailable. Exiting."); |
| 78 | return false; |
| 79 | } |
| 80 | |
| 81 | ALOGD("Requesting camera list"); |
| 82 | for (auto&& info : config.getCameras()) { |
Haoxiang Li | 31ae4ed | 2019-09-06 16:35:09 -0700 | [diff] [blame] | 83 | // This use case is currently a single camera use case. |
| 84 | // Only one element is available in the camera id list. |
Haoxiang Li | 5cb6905 | 2019-08-30 16:24:25 -0700 | [diff] [blame] | 85 | string cameraId = mCameraIds[0]; |
| 86 | if (cameraId == info.cameraId) { |
Haoxiang Li | c888859 | 2019-09-19 16:39:53 -0700 | [diff] [blame] | 87 | mStreamHandler = mResourceManager->obtainStreamHandler(cameraId); |
Haoxiang Li | 5cb6905 | 2019-08-30 16:24:25 -0700 | [diff] [blame] | 88 | if (mStreamHandler.get() == nullptr) { |
| 89 | ALOGE("Failed to get a valid StreamHandler for %s", |
| 90 | cameraId.c_str()); |
| 91 | return false; |
| 92 | } |
| 93 | |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 94 | mIsInitialized = true; |
| 95 | return true; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | ALOGE("Cannot find a match camera. Exiting"); |
| 100 | return false; |
| 101 | } |
| 102 | |
Haoxiang Li | 1709b37 | 2019-09-18 15:08:52 -0700 | [diff] [blame] | 103 | // TODO(b/130246434): if user accidentally call this function twice, there is |
| 104 | // no logic to handle that and it will causes issues. For example, the |
| 105 | // mWorkerThread will be assigned twice and cause unexpected behavior. |
| 106 | // We need to fix this issue. |
Haoxiang Li | 2010d39 | 2019-09-04 14:06:20 -0700 | [diff] [blame] | 107 | bool DisplayUseCase::startVideoStream() { |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 108 | // Initialize the use case. |
| 109 | if (!mIsInitialized && !initialize()) { |
| 110 | ALOGE("There is an error while initializing the use case. Exiting"); |
| 111 | return false; |
| 112 | } |
| 113 | |
Haoxiang Li | 5cb6905 | 2019-08-30 16:24:25 -0700 | [diff] [blame] | 114 | ALOGD("Attach use case to StreamHandler"); |
| 115 | if (mRenderCallback != nullptr) { |
| 116 | mStreamHandler->attachRenderCallback(mRenderCallback); |
| 117 | } |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 118 | |
Haoxiang Li | 5cb6905 | 2019-08-30 16:24:25 -0700 | [diff] [blame] | 119 | ALOGD("Start video streaming using worker thread"); |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 120 | mIsReadyToRun = true; |
| 121 | mWorkerThread = std::thread([this]() { |
| 122 | // We have a camera assigned to this state for direct view |
Haoxiang Li | 1709b37 | 2019-09-18 15:08:52 -0700 | [diff] [blame] | 123 | mCurrentRenderer = std::make_unique<RenderDirectView>(); |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 124 | if (!mCurrentRenderer) { |
| 125 | ALOGE("Failed to construct direct renderer. Exiting."); |
| 126 | mIsReadyToRun = false; |
| 127 | return; |
| 128 | } |
| 129 | |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 130 | // Now set the display state based on whether we have a video feed to show |
| 131 | // Start the camera stream |
| 132 | ALOGD("EvsStartCameraStreamTiming start time: %" PRId64 "ms", android::elapsedRealtime()); |
| 133 | if (!mCurrentRenderer->activate()) { |
| 134 | ALOGE("New renderer failed to activate. Exiting"); |
| 135 | mIsReadyToRun = false; |
| 136 | return; |
| 137 | } |
| 138 | |
| 139 | // Activate the display |
| 140 | ALOGD("EvsActivateDisplayTiming start time: %" PRId64 "ms", android::elapsedRealtime()); |
| 141 | Return<EvsResult> result = mDisplay->setDisplayState(DisplayState::VISIBLE_ON_NEXT_FRAME); |
| 142 | if (result != EvsResult::OK) { |
| 143 | ALOGE("setDisplayState returned an error (%d). Exiting.", (EvsResult)result); |
| 144 | mIsReadyToRun = false; |
| 145 | return; |
| 146 | } |
| 147 | |
Haoxiang Li | 1709b37 | 2019-09-18 15:08:52 -0700 | [diff] [blame] | 148 | if (!mStreamHandler->startStream()) { |
| 149 | ALOGE("failed to start stream handler"); |
| 150 | mIsReadyToRun = false; |
| 151 | return; |
| 152 | } |
| 153 | |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 154 | while (mIsReadyToRun && streamFrame()); |
| 155 | |
| 156 | ALOGD("Worker thread stops."); |
| 157 | }); |
| 158 | |
| 159 | return true; |
| 160 | } |
| 161 | |
Haoxiang Li | 2010d39 | 2019-09-04 14:06:20 -0700 | [diff] [blame] | 162 | void DisplayUseCase::stopVideoStream() { |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 163 | ALOGD("Stop video streaming in worker thread."); |
| 164 | mIsReadyToRun = false; |
Haoxiang Li | 1709b37 | 2019-09-18 15:08:52 -0700 | [diff] [blame] | 165 | |
Haoxiang Li | c888859 | 2019-09-19 16:39:53 -0700 | [diff] [blame] | 166 | if (mStreamHandler == nullptr) { |
| 167 | ALOGE("Failed to detach render callback since stream handler is null"); |
| 168 | |
| 169 | // Something may go wrong. Instead of to return this method right away, |
| 170 | // we want to finish the remaining logic of this method to try to |
| 171 | // release other resources. |
| 172 | } else { |
| 173 | mStreamHandler->detachRenderCallback(); |
| 174 | } |
| 175 | |
| 176 | if (mResourceManager == nullptr) { |
| 177 | ALOGE("Failed to release resources since resource manager is null"); |
| 178 | } else { |
| 179 | mResourceManager->releaseStreamHandler(mCameraIds[0]); |
| 180 | mStreamHandler = nullptr; |
| 181 | |
| 182 | mResourceManager->closeDisplay(mDisplay); |
| 183 | mDisplay = nullptr; |
| 184 | |
| 185 | // TODO(b/130246434): with the current logic, the initialize method will |
| 186 | // be triggered every time when a pair of |
| 187 | // stopVideoStream/startVideoStream is called. We might want to move |
| 188 | // some heavy work away from initialize method so increase the |
| 189 | // performance. |
| 190 | |
| 191 | // Sets mIsInitialzed to false so the initialize method will be |
| 192 | // triggered when startVideoStream is called again. |
| 193 | mIsInitialized = false; |
| 194 | } |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 195 | return; |
| 196 | } |
| 197 | |
| 198 | bool DisplayUseCase::streamFrame() { |
| 199 | // Get the output buffer we'll use to display the imagery |
| 200 | BufferDesc tgtBuffer = {}; |
| 201 | mDisplay->getTargetBuffer([&tgtBuffer](const BufferDesc& buff) { tgtBuffer = buff; }); |
| 202 | |
Haoxiang Li | 1709b37 | 2019-09-18 15:08:52 -0700 | [diff] [blame] | 203 | // TODO(b/130246434): if there is no new display frame available, shall we |
| 204 | // still get display buffer? Shall we just skip and keep the display |
| 205 | // un-refreshed? |
| 206 | // We should explore this option. |
| 207 | |
| 208 | // If there is no display buffer available, skip it. |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 209 | if (tgtBuffer.memHandle == nullptr) { |
Haoxiang Li | 1709b37 | 2019-09-18 15:08:52 -0700 | [diff] [blame] | 210 | ALOGW("Didn't get requested output buffer -- skipping this frame."); |
| 211 | |
| 212 | // Return true since it won't affect next call. |
| 213 | return true; |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 214 | } else { |
Haoxiang Li | 1709b37 | 2019-09-18 15:08:52 -0700 | [diff] [blame] | 215 | // If there is no new display frame available, re-use the old (held) |
| 216 | // frame for display. |
| 217 | // Otherwise, return the old (held) frame, fetch the newly available |
| 218 | // frame from stream handler, and use the new frame for display |
| 219 | // purposes. |
| 220 | if (!mStreamHandler->newDisplayFrameAvailable()) { |
| 221 | ALOGD("No new display frame is available. Re-use the old frame."); |
| 222 | } else { |
| 223 | ALOGD("Get new display frame, refreshing"); |
| 224 | |
| 225 | // If we already hold a camera image for display purposes, it's |
| 226 | // time to return it to evs camera driver. |
| 227 | if (mImageBuffer.memHandle.getNativeHandle() != nullptr) { |
| 228 | mStreamHandler->doneWithFrame(mImageBuffer); |
| 229 | } |
| 230 | |
| 231 | // Get the new image we want to use as our display content |
| 232 | mImageBuffer = mStreamHandler->getNewDisplayFrame(); |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 233 | } |
| 234 | |
Haoxiang Li | 1709b37 | 2019-09-18 15:08:52 -0700 | [diff] [blame] | 235 | // Render the image buffer to the display buffer |
| 236 | bool result = mCurrentRenderer->drawFrame(tgtBuffer, mImageBuffer); |
| 237 | |
| 238 | // Send the finished display buffer back to display driver |
| 239 | // Even if the rendering fails, we still want to return the display |
| 240 | // buffer. |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 241 | mDisplay->returnTargetBufferForDisplay(tgtBuffer); |
Haoxiang Li | 1709b37 | 2019-09-18 15:08:52 -0700 | [diff] [blame] | 242 | |
| 243 | return result; |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 244 | } |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | DisplayUseCase DisplayUseCase::createDefaultUseCase(string cameraId, BaseRenderCallback* callback) { |
| 248 | return DisplayUseCase(cameraId, callback); |
| 249 | } |
| 250 | |
| 251 | } // namespace support |
| 252 | } // namespace evs |
| 253 | } // namespace automotive |
| 254 | } // namespace android |