/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2019-2021, Google Inc. * * camera_request.cpp - libcamera Android Camera Request Descriptor */ #include "camera_request.h" #include #include "camera_buffer.h" using namespace libcamera; /* * \class Camera3RequestDescriptor * * A utility class that groups information about a capture request to be later * reused at request complete time to notify the framework. * ******************************************************************************* * Lifetime of a Camera3RequestDescriptor tracking a capture request placed by * Android Framework ******************************************************************************* * * * Android Framework * │ * │ ┌──────────────────────────────────┐ * │ │camera3_capture_request_t │ * │ │ │ * │ │Requested output streams │ * │ │ stream1 stream2 stream3 ... │ * │ └──────────────────────────────────┘ * ▼ * ┌─────────────────────────────────────────────────────────────┐ * │ libcamera HAL │ * ├─────────────────────────────────────────────────────────────┤ * │ CameraDevice │ * │ │ * │ processCaptureRequest(camera3_capture_request_t request) │ * │ │ * │ - Create Camera3RequestDescriptor tracking this request │ * │ - Streams requiring post-processing are stored in the │ * │ pendingStreamsToProcess map │ * │ - Add this Camera3RequestDescriptor to descriptors' queue │ * │ CameraDevice::descriptors_ │ * │ │ ┌─────────────────────────┐ * │ - Queue the capture request to libcamera core ────────────┤►│libcamera core │ * │ │ ├─────────────────────────┤ * │ │ │- Capture from Camera │ * │ │ │ │ * │ │ │- Emit │ * │ │ │ Camera::requestComplete│ * │ requestCompleted(Request *request) ◄───────────────────────┼─┼──── │ * │ │ │ │ * │ - Check request completion status │ └─────────────────────────┘ * │ │ * │ - if (pendingStreamsToProcess > 0) │ * │ Queue all entries from pendingStreamsToProcess │ * │ else │ │ * │ completeDescriptor() │ └──────────────────────┐ * │ │ │ * │ ┌──────────────────────────┴───┬──────────────────┐ │ * │ │ │ │ │ * │ ┌──────────▼────────────┐ ┌───────────▼─────────┐ ▼ │ * │ │CameraStream1 │ │CameraStream2 │ .... │ * │ ├┬───┬───┬──────────────┤ ├┬───┬───┬────────────┤ │ * │ ││ │ │ │ ││ │ │ │ │ * │ │▼───▼───▼──────────────┤ │▼───▼───▼────────────┤ │ * │ │PostProcessorWorker │ │PostProcessorWorker │ │ * │ │ │ │ │ │ * │ │ +------------------+ │ │ +------------------+│ │ * │ │ | PostProcessor | │ │ | PostProcessor |│ │ * │ │ | process() | │ │ | process() |│ │ * │ │ | | │ │ | |│ │ * │ │ | Emit | │ │ | Emit |│ │ * │ │ | processComplete | │ │ | processComplete |│ │ * │ │ | | │ │ | |│ │ * │ │ +--------------│---+ │ │ +--------------│---+│ │ * │ │ │ │ │ │ │ │ * │ │ │ │ │ │ │ │ * │ └────────────────┼──────┘ └────────────────┼────┘ │ * │ │ │ │ * │ │ │ │ * │ │ │ │ * │ ▼ ▼ │ * │ +---------------------------------------+ +--------------+ │ * │ | CameraDevice | | | │ * │ | | | | │ * │ | streamProcessingComplete() | | | │ * │ | | | | │ * │ | - Check and set buffer status | | .... | │ * │ | - Remove post+processing entry | | | │ * │ | from pendingStreamsToProcess | | | │ * │ | | | | │ * │ | - if (pendingStreamsToProcess.empty())| | | │ * │ | completeDescriptor | | | │ * │ | | | | │ * │ +---------------------------------------+ +--------------+ │ * │ │ * └────────────────────────────────────────────────────────────────────────────────────┘ * * +-------------+ * | | - PostProcessorWorker's thread * | | * +-------------+ */ Camera3RequestDescriptor::Camera3RequestDescriptor( Camera *camera, const camera3_capture_request_t *camera3Request) { frameNumber_ = camera3Request->frame_number; /* Copy the camera3 request stream information for later access. */ const Span buffers{ camera3Request->output_buffers, camera3Request->num_output_buffers }; buffers_.reserve(buffers.size()); for (const camera3_stream_buffer_t &buffer : buffers) { CameraStream *stream = static_cast(buffer.stream->priv); buffers_.emplace_back(stream, buffer, this); } /* Clone the controls associated with the camera3 request. */ settings_ = CameraMetadata(camera3Request->settings); /* * Create the CaptureRequest, stored as a unique_ptr<> to tie its * lifetime to the descriptor. */ request_ = camera->createRequest(reinterpret_cast(this)); } Camera3RequestDescriptor::~Camera3RequestDescriptor() = default; /** * \struct Camera3RequestDescriptor::StreamBuffer * \brief Group information for per-stream buffer of Camera3RequestDescriptor * * A capture request placed to the libcamera HAL can contain multiple streams. * Each stream will have an associated buffer to be filled. StreamBuffer * tracks this buffer with contextual information which aids in the stream's * generation. The generation of the stream will depend on its type (refer to * the CameraStream::Type documentation). * * \var Camera3RequestDescriptor::StreamBuffer::stream * \brief Pointer to the corresponding CameraStream * * \var Camera3RequestDescriptor::StreamBuffer::camera3Buffer * \brief Native handle to the buffer * * \var Camera3RequestDescriptor::StreamBuffer::frameBuffer * \brief Encapsulate the dmabuf handle inside a libcamera::FrameBuffer for * direct streams * * \var Camera3RequestDescriptor::StreamBuffer::fence * \brief Acquire fence of the buffer * * \var Camera3RequestDescriptor::StreamBuffer::status * \brief Track the status of the buffer * * \var Camera3RequestDescriptor::StreamBuffer::internalBuffer * \brief Pointer to a buffer internally handled by CameraStream (if any) * * \var Camera3RequestDescriptor::StreamBuffer::srcBuffer * \brief Pointer to the source frame buffer used for post-processing * * \var Camera3RequestDescriptor::StreamBuffer::dstBuffer * \brief Pointer to the destination frame buffer used for post-processing * * \var Camera3RequestDescriptor::StreamBuffer::request * \brief Back pointer to the Camera3RequestDescriptor to which the StreamBuffer belongs */ Camera3RequestDescriptor::StreamBuffer::StreamBuffer( CameraStream *cameraStream, const camera3_stream_buffer_t &buffer, Camera3RequestDescriptor *requestDescriptor) : stream(cameraStream), camera3Buffer(buffer.buffer), fence(buffer.acquire_fence), request(requestDescriptor) { } Camera3RequestDescriptor::StreamBuffer::~StreamBuffer() = default; Camera3RequestDescriptor::StreamBuffer::StreamBuffer(StreamBuffer &&) = default; Camera3RequestDescriptor::StreamBuffer & Camera3RequestDescriptor::StreamBuffer::operator=(Camera3RequestDescriptor::StreamBuffer &&) = default; 8'>218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446