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V4L (V4L2): Refactoring. Added missed camera properties. Fixed getting `INF` for some properties. Singlethread as always (#12893) * cap_v4l: 1 Added cap_properties verbalization. 2 Set Get of properties elementary refactoring. 3 Removed converting parameters to/from [0,1] range. 4 Added all known conversion from V4L2_CID_* to CV_CAP_PROP_* * cap_v4l: 1. Removed all query for parameters range. 2. Refactored capture initialization. 3. Added selecting input channel by CV_CAP_PROP_MODE. Default value -1 the channels not changed. * cap_v4l: 1. Refactoring of Convert To RGB * cap_v4l: 1. Fixed use of video buffer index. 2. Removed extra memcopy for grab image. 3. Removed device closing from autosetup_capture_mode_v4l2 * cap_v4l: 1. The `goto` was eliminated 2. Fixed use of temporary buffer index for V4L2_PIX_FMT_SN9C10X 3. Fixed use of the bufferIndex 4. Removed trailing spaces and unused variables. * cap_v4l: 1. Alias for capture->buffers[capture->bufferIndex] 2. Reduced size of data for memcpy: bytesused instead of length 3. Refactoring. Code duplication. More info for debug * cap_v4l: 1. Added the ability to grab and retrieveFrame independently several times * cap_v4l: 1. Not need to close/open device for new capture parameters applying. 2. Removed using of device name as a flag that the capture is closed. Added sufficient function. 3. Refactoring. Added requestBuffers and createBuffers * cap_v4l: 1. Added tryIoctl with `select` like was in mainloop_v4l2. 2. Fixed buffer request for device without closing the device. 3. Some static function moved to CvCaptureCAM_V4L 4. Removed unused defines * cap_v4l: 1. Thread-safe now * cap_v4l: 1. Fixed thread-safe destructor 2. Fixed FPS setting * Missed brake * Removed thread-safety * cap_v4l: 1. Reverted conversion parameters to/from [0,1] by default for backward compatibility. 2. Added setting for turn off compatibility mode: set CV_CAP_PROP_MODE to 65536 3. Most static functions moved to CvCaptureCAM_V4L 4. Refactoring of icvRetrieveFrameCAM_V4L and using of frame_allocated flag * cap_v4l: 1. Added conversion to RGB from NV12, NV21 2. Refactoring. Removed wrappers for known format conversions. * Added `CAP_PROP_CHANNEL` to the enum VideoCaptureProperties. CAP_V4L migrated to use VideoCaptureProperties. * 1. Update comments. 2. Environment variable `OPENCV_VIDEOIO_V4L_RANGE_NORMALIZED` for setting default backward compatibility mode. 3. Revert getting of `CAP_PROP_MODE` as fourcc code in backward compatibility mode. * videoio: update cap_v4l - compatibilityMode => normalizePropRange * videoio(test): V4L2 MJPEG test `v4l2-ctl --list-formats` should have 'MJPG' entry * videoio: fix buffer initialization to avoid "munmap: Invalid argument" messages |
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