| .. -*- coding: utf-8; mode: rst -*- |
| |
| .. _v4l2-selection-targets: |
| |
| ***************** |
| Selection targets |
| ***************** |
| |
| The precise meaning of the selection targets may be dependent on which |
| of the two interfaces they are used. |
| |
| |
| .. _v4l2-selection-targets-table: |
| |
| .. flat-table:: Selection target definitions |
| :header-rows: 1 |
| :stub-columns: 0 |
| |
| |
| - .. row 1 |
| |
| - Target name |
| |
| - id |
| |
| - Definition |
| |
| - Valid for V4L2 |
| |
| - Valid for V4L2 subdev |
| |
| - .. row 2 |
| |
| - ``V4L2_SEL_TGT_CROP`` |
| |
| - 0x0000 |
| |
| - Crop rectangle. Defines the cropped area. |
| |
| - Yes |
| |
| - Yes |
| |
| - .. row 3 |
| |
| - ``V4L2_SEL_TGT_CROP_DEFAULT`` |
| |
| - 0x0001 |
| |
| - Suggested cropping rectangle that covers the "whole picture". |
| |
| - Yes |
| |
| - No |
| |
| - .. row 4 |
| |
| - ``V4L2_SEL_TGT_CROP_BOUNDS`` |
| |
| - 0x0002 |
| |
| - Bounds of the crop rectangle. All valid crop rectangles fit inside |
| the crop bounds rectangle. |
| |
| - Yes |
| |
| - Yes |
| |
| - .. row 5 |
| |
| - ``V4L2_SEL_TGT_NATIVE_SIZE`` |
| |
| - 0x0003 |
| |
| - The native size of the device, e.g. a sensor's pixel array. |
| ``left`` and ``top`` fields are zero for this target. Setting the |
| native size will generally only make sense for memory to memory |
| devices where the software can create a canvas of a given size in |
| which for example a video frame can be composed. In that case |
| V4L2_SEL_TGT_NATIVE_SIZE can be used to configure the size of |
| that canvas. |
| |
| - Yes |
| |
| - Yes |
| |
| - .. row 6 |
| |
| - ``V4L2_SEL_TGT_COMPOSE`` |
| |
| - 0x0100 |
| |
| - Compose rectangle. Used to configure scaling and composition. |
| |
| - Yes |
| |
| - Yes |
| |
| - .. row 7 |
| |
| - ``V4L2_SEL_TGT_COMPOSE_DEFAULT`` |
| |
| - 0x0101 |
| |
| - Suggested composition rectangle that covers the "whole picture". |
| |
| - Yes |
| |
| - No |
| |
| - .. row 8 |
| |
| - ``V4L2_SEL_TGT_COMPOSE_BOUNDS`` |
| |
| - 0x0102 |
| |
| - Bounds of the compose rectangle. All valid compose rectangles fit |
| inside the compose bounds rectangle. |
| |
| - Yes |
| |
| - Yes |
| |
| - .. row 9 |
| |
| - ``V4L2_SEL_TGT_COMPOSE_PADDED`` |
| |
| - 0x0103 |
| |
| - The active area and all padding pixels that are inserted or |
| modified by hardware. |
| |
| - Yes |
| |
| - No |