diff options
| author | Umang Jain <umang.jain@ideasonboard.com> | 2022-01-04 12:22:01 +0530 |
|---|---|---|
| committer | Umang Jain <umang.jain@ideasonboard.com> | 2022-03-03 17:29:02 +0530 |
| commit | e68e0f1ed2880ea26b5e317f94e2bbd5332e1598 (patch) | |
| tree | 147d280d2c9f553603da8ecd16f564096e090888 /src | |
| parent | bf0154697b69a92a0c4647fe7d1527a9f77042a1 (diff) | |
android: camera_request: Lifetime of a Camera3RequestDescriptor
This commit provides a sketch regarding Camera3RequestDescriptor
which aids tracking each capture reuqest placed by the android
framework to libcamera HAL.
Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/android/camera_request.cpp | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/android/camera_request.cpp b/src/android/camera_request.cpp index 1593f219..6c87adba 100644 --- a/src/android/camera_request.cpp +++ b/src/android/camera_request.cpp @@ -18,6 +18,94 @@ using namespace libcamera; * * 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( |