Sébastien Blin | 1f91576 | 2020-08-03 13:27:42 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019-2020 by Savoir-faire Linux |
| 3 | * Author: Andreas Traczyk <andreas.traczyk@savoirfairelinux.com> |
| 4 | * Author: Mingrui Zhang <mingrui.zhang@savoirfairelinux.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 3 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | #include "rendermanager.h" |
| 21 | |
| 22 | #include <QtConcurrent/QtConcurrent> |
| 23 | |
| 24 | #include <stdexcept> |
| 25 | |
| 26 | using namespace lrc::api; |
| 27 | |
| 28 | FrameWrapper::FrameWrapper(AVModel &avModel, const QString &id) |
| 29 | : avModel_(avModel) |
| 30 | , id_(id) |
| 31 | , isRendering_(false) |
| 32 | {} |
| 33 | |
| 34 | FrameWrapper::~FrameWrapper() |
| 35 | { |
| 36 | if (id_ == video::PREVIEW_RENDERER_ID) { |
| 37 | avModel_.stopPreview(); |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | void |
| 42 | FrameWrapper::connectStartRendering() |
| 43 | { |
| 44 | QObject::disconnect(renderConnections_.started); |
| 45 | renderConnections_.started = QObject::connect(&avModel_, |
| 46 | &AVModel::rendererStarted, |
| 47 | this, |
| 48 | &FrameWrapper::slotRenderingStarted); |
| 49 | } |
| 50 | |
| 51 | bool |
| 52 | FrameWrapper::startRendering() |
| 53 | { |
| 54 | try { |
| 55 | renderer_ = const_cast<video::Renderer *>(&avModel_.getRenderer(id_)); |
| 56 | } catch (std::out_of_range &e) { |
| 57 | qWarning() << e.what(); |
| 58 | return false; |
| 59 | } |
| 60 | |
| 61 | QObject::disconnect(renderConnections_.updated); |
| 62 | QObject::disconnect(renderConnections_.stopped); |
| 63 | |
| 64 | renderConnections_.updated = QObject::connect(&avModel_, |
| 65 | &AVModel::frameUpdated, |
| 66 | this, |
| 67 | &FrameWrapper::slotFrameUpdated); |
| 68 | |
| 69 | renderConnections_.stopped = QObject::connect(&avModel_, |
| 70 | &AVModel::rendererStopped, |
| 71 | this, |
| 72 | &FrameWrapper::slotRenderingStopped); |
| 73 | |
| 74 | return true; |
| 75 | } |
| 76 | |
| 77 | QImage * |
| 78 | FrameWrapper::getFrame() |
| 79 | { |
| 80 | return image_.get(); |
| 81 | } |
| 82 | |
| 83 | bool |
| 84 | FrameWrapper::isRendering() |
| 85 | { |
| 86 | return isRendering_; |
| 87 | } |
| 88 | |
| 89 | void |
| 90 | FrameWrapper::slotRenderingStarted(const QString &id) |
| 91 | { |
| 92 | if (id != id_) { |
| 93 | return; |
| 94 | } |
| 95 | |
| 96 | if (!startRendering()) { |
| 97 | qWarning() << "Couldn't start rendering for id: " << id_; |
| 98 | return; |
| 99 | } |
| 100 | |
| 101 | isRendering_ = true; |
| 102 | |
| 103 | emit renderingStarted(id); |
| 104 | } |
| 105 | |
| 106 | void |
| 107 | FrameWrapper::slotFrameUpdated(const QString &id) |
| 108 | { |
| 109 | if (id != id_) { |
| 110 | return; |
| 111 | } |
| 112 | |
| 113 | if (!renderer_ || !renderer_->isRendering()) { |
| 114 | return; |
| 115 | } |
| 116 | |
| 117 | { |
| 118 | QMutexLocker lock(&mutex_); |
| 119 | |
| 120 | frame_ = renderer_->currentFrame(); |
| 121 | |
| 122 | unsigned int width = renderer_->size().width(); |
| 123 | unsigned int height = renderer_->size().height(); |
| 124 | |
| 125 | #ifndef Q_OS_LINUX |
| 126 | unsigned int size = frame_.storage.size(); |
| 127 | /* |
| 128 | * If the frame is empty or not the expected size, |
| 129 | * do nothing and keep the last rendered QImage. |
| 130 | */ |
| 131 | if (size != 0 && size == width * height * 4) { |
| 132 | buffer_ = std::move(frame_.storage); |
| 133 | image_.reset(new QImage((uchar *) buffer_.data(), |
| 134 | width, |
| 135 | height, |
| 136 | QImage::Format_ARGB32_Premultiplied)); |
| 137 | #else |
| 138 | if (frame_.ptr) { |
| 139 | image_.reset(new QImage(frame_.ptr, width, height, QImage::Format_ARGB32)); |
| 140 | #endif |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | emit frameUpdated(id); |
| 145 | } |
| 146 | |
| 147 | void |
| 148 | FrameWrapper::slotRenderingStopped(const QString &id) |
| 149 | { |
| 150 | if (id != id_) { |
| 151 | return; |
| 152 | } |
| 153 | |
| 154 | QObject::disconnect(renderConnections_.updated); |
| 155 | QObject::disconnect(renderConnections_.stopped); |
| 156 | renderer_ = nullptr; |
| 157 | |
| 158 | /* |
| 159 | * The object's QImage pointer is reset before renderingStopped |
| 160 | * is emitted, allowing the listener to invoke specific behavior |
| 161 | * like clearing the widget or changing the UI entirely. |
| 162 | */ |
| 163 | image_.reset(); |
| 164 | |
| 165 | isRendering_ = false; |
| 166 | |
| 167 | emit renderingStopped(id); |
| 168 | } |
| 169 | |
| 170 | RenderManager::RenderManager(AVModel &avModel) |
| 171 | : avModel_(avModel) |
| 172 | { |
| 173 | deviceListSize_ = avModel_.getDevices().size(); |
| 174 | connect(&avModel_, &lrc::api::AVModel::deviceEvent, this, &RenderManager::slotDeviceEvent); |
| 175 | |
| 176 | previewFrameWrapper_ = std::make_unique<FrameWrapper>(avModel_); |
| 177 | |
| 178 | QObject::connect(previewFrameWrapper_.get(), |
| 179 | &FrameWrapper::renderingStarted, |
| 180 | [this](const QString &id) { |
| 181 | Q_UNUSED(id); |
| 182 | emit previewRenderingStarted(); |
| 183 | }); |
| 184 | QObject::connect(previewFrameWrapper_.get(), |
| 185 | &FrameWrapper::frameUpdated, |
| 186 | [this](const QString &id) { |
| 187 | Q_UNUSED(id); |
| 188 | emit previewFrameUpdated(); |
| 189 | }); |
| 190 | QObject::connect(previewFrameWrapper_.get(), |
| 191 | &FrameWrapper::renderingStopped, |
| 192 | [this](const QString &id) { |
| 193 | Q_UNUSED(id); |
| 194 | emit previewRenderingStopped(); |
| 195 | }); |
| 196 | |
| 197 | previewFrameWrapper_->connectStartRendering(); |
| 198 | } |
| 199 | |
| 200 | RenderManager::~RenderManager() |
| 201 | { |
| 202 | previewFrameWrapper_.reset(); |
| 203 | |
| 204 | for (auto &dfw : distantFrameWrapperMap_) { |
| 205 | dfw.second.reset(); |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | bool |
| 210 | RenderManager::isPreviewing() |
| 211 | { |
| 212 | return previewFrameWrapper_->isRendering(); |
| 213 | } |
| 214 | |
| 215 | QImage * |
| 216 | RenderManager::getPreviewFrame() |
| 217 | { |
| 218 | return previewFrameWrapper_->getFrame(); |
| 219 | } |
| 220 | |
| 221 | void |
| 222 | RenderManager::stopPreviewing(bool async) |
| 223 | { |
| 224 | if (!previewFrameWrapper_->isRendering()) { |
| 225 | return; |
| 226 | } |
| 227 | |
| 228 | if (async) { |
| 229 | QtConcurrent::run([this] { avModel_.stopPreview(); }); |
| 230 | } else { |
| 231 | avModel_.stopPreview(); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | void |
| 236 | RenderManager::startPreviewing(bool force, bool async) |
| 237 | { |
| 238 | if (previewFrameWrapper_->isRendering() && !force) { |
| 239 | return; |
| 240 | } |
| 241 | |
| 242 | auto restart = [this] { |
| 243 | if (previewFrameWrapper_->isRendering()) { |
| 244 | avModel_.stopPreview(); |
| 245 | } |
| 246 | avModel_.startPreview(); |
| 247 | }; |
| 248 | if (async) { |
| 249 | QtConcurrent::run(restart); |
| 250 | } else { |
| 251 | restart(); |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | QImage * |
| 256 | RenderManager::getFrame(const QString &id) |
| 257 | { |
| 258 | auto dfwIt = distantFrameWrapperMap_.find(id); |
| 259 | if (dfwIt != distantFrameWrapperMap_.end()) { |
| 260 | return dfwIt->second->getFrame(); |
| 261 | } |
| 262 | return nullptr; |
| 263 | } |
| 264 | |
| 265 | void |
| 266 | RenderManager::addDistantRenderer(const QString &id) |
| 267 | { |
| 268 | /* |
| 269 | * Check if a FrameWrapper with this id exists. |
| 270 | */ |
| 271 | auto dfwIt = distantFrameWrapperMap_.find(id); |
| 272 | if (dfwIt != distantFrameWrapperMap_.end()) { |
| 273 | if (!dfwIt->second->startRendering()) { |
| 274 | qWarning() << "Couldn't start rendering for id: " << id; |
| 275 | } |
| 276 | } else { |
| 277 | auto dfw = std::make_unique<FrameWrapper>(avModel_, id); |
| 278 | |
| 279 | /* |
| 280 | * Connect this to the FrameWrapper. |
| 281 | */ |
| 282 | distantConnectionMap_[id].started = QObject::connect(dfw.get(), |
| 283 | &FrameWrapper::renderingStarted, |
| 284 | [this](const QString &id) { |
| 285 | emit distantRenderingStarted(id); |
| 286 | }); |
| 287 | distantConnectionMap_[id].updated = QObject::connect(dfw.get(), |
| 288 | &FrameWrapper::frameUpdated, |
| 289 | [this](const QString &id) { |
| 290 | emit distantFrameUpdated(id); |
| 291 | }); |
| 292 | distantConnectionMap_[id].stopped = QObject::connect(dfw.get(), |
| 293 | &FrameWrapper::renderingStopped, |
| 294 | [this](const QString &id) { |
| 295 | emit distantRenderingStopped(id); |
| 296 | }); |
| 297 | |
| 298 | /* |
| 299 | * Connect FrameWrapper to avmodel. |
| 300 | */ |
| 301 | dfw->connectStartRendering(); |
| 302 | |
| 303 | /* |
| 304 | * Add to map. |
| 305 | */ |
| 306 | distantFrameWrapperMap_.insert(std::make_pair(id, std::move(dfw))); |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | void |
| 311 | RenderManager::removeDistantRenderer(const QString &id) |
| 312 | { |
| 313 | auto dfwIt = distantFrameWrapperMap_.find(id); |
| 314 | if (dfwIt != distantFrameWrapperMap_.end()) { |
| 315 | /* |
| 316 | * Disconnect FrameWrapper from this. |
| 317 | */ |
| 318 | auto dcIt = distantConnectionMap_.find(id); |
| 319 | if (dcIt != distantConnectionMap_.end()) { |
| 320 | QObject::disconnect(dcIt->second.started); |
| 321 | QObject::disconnect(dcIt->second.updated); |
| 322 | QObject::disconnect(dcIt->second.stopped); |
| 323 | } |
| 324 | |
| 325 | /* |
| 326 | * Erase. |
| 327 | */ |
| 328 | distantFrameWrapperMap_.erase(dfwIt); |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | void |
| 333 | RenderManager::slotDeviceEvent() |
| 334 | { |
| 335 | auto defaultDevice = avModel_.getDefaultDevice(); |
| 336 | auto currentCaptureDevice = avModel_.getCurrentVideoCaptureDevice(); |
| 337 | /* |
| 338 | * Decide whether a device has plugged, unplugged, or nothing has changed. |
| 339 | */ |
| 340 | auto deviceList = avModel_.getDevices(); |
| 341 | auto currentDeviceListSize = deviceList.size(); |
| 342 | |
| 343 | DeviceEvent deviceEvent{DeviceEvent::None}; |
| 344 | if (currentDeviceListSize > deviceListSize_) { |
| 345 | deviceEvent = DeviceEvent::Added; |
| 346 | } else if (currentDeviceListSize < deviceListSize_) { |
| 347 | /* |
| 348 | * Check if the currentCaptureDevice is still in the device list. |
| 349 | */ |
| 350 | if (std::find(std::begin(deviceList), std::end(deviceList), currentCaptureDevice) |
| 351 | == std::end(deviceList)) { |
| 352 | deviceEvent = DeviceEvent::RemovedCurrent; |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | if (previewFrameWrapper_->isRendering()) { |
| 357 | if (currentDeviceListSize == 0) { |
| 358 | avModel_.clearCurrentVideoCaptureDevice(); |
| 359 | avModel_.switchInputTo({}); |
| 360 | stopPreviewing(); |
| 361 | } else if (deviceEvent == DeviceEvent::RemovedCurrent && currentDeviceListSize > 0) { |
| 362 | avModel_.setCurrentVideoCaptureDevice(defaultDevice); |
| 363 | startPreviewing(true); |
| 364 | } else { |
| 365 | startPreviewing(); |
| 366 | } |
| 367 | } else if (deviceEvent == DeviceEvent::Added && currentDeviceListSize == 1) { |
| 368 | avModel_.setCurrentVideoCaptureDevice(defaultDevice); |
| 369 | } |
| 370 | |
| 371 | emit videoDeviceListChanged(); |
| 372 | |
| 373 | deviceListSize_ = currentDeviceListSize; |
| 374 | } |