libcamera/vivid.git - libcamera pipeline handler for VIVID

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author	Naushir Patuck <naush@raspberrypi.com>	2020-11-16 14:37:56 +0000
committer	Kieran Bingham <kieran.bingham@ideasonboard.com>	2020-11-16 20:46:40 +0000
commit	6f51e39d78dfc6fdd1add732e282de119600447c (patch)
tree	db3d21cbcddbd08aaf1bf4fa5b7a9d872abd6846 /src/ipa/raspberrypi/controller/ccm_status.h
parent	d14a3f8ae62d74a21f1a04d1fbbbd23b762a6236 (diff)

pipeline: raspberrypi: Use MappedFrameBuffer for embedded data buffers

Use a MappedFrameBuffer to mmap embedded data buffers for the pipeline handler to use in the cases where the sensor does not fill it in. This avoids the need to mmap and unmap on every frame. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

Diffstat (limited to 'src/ipa/raspberrypi/controller/ccm_status.h')

0 files changed, 0 insertions, 0 deletions

/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2020, Raspberry Pi Ltd * * transform.cpp - 2D plane transforms. */ #include <libcamera/transform.h> /** * \file transform.h * \brief Enum to represent and manipulate 2D plane transforms */ namespace libcamera { /** * \enum Transform * \brief Enum to represent a 2D plane transform * * The Transform can take 8 distinct values, representing the usual 2D plane * transforms listed below. Each of these transforms can be constructed * out of 3 basic operations, namely a horizontal flip (mirror), a vertical * flip, and a transposition (about the main diagonal). The transforms are * encoded such that a single bit indicates the presence of each of the 3 * basic operations: * * - bit 0 - presence of a horizontal flip * - bit 1 - presence of a vertical flip * - bit 2 - presence of a transposition. * * We regard these 3 basic operations as being applied in a specific order: * first the two flip operations (actually they commute, so the order between * them is unimportant) and finally any transpose operation. * * Functions are provided to manipulate directly the bits within the transform * encoding, but there are also higher-level functions to invert and compose * transforms. Transforms are composed according to the usual mathematical * convention such that the right transform is applied first, and the left * transform is applied second. * * Finally, we have a total of 8 distinct transformations, as follows (a * couple of them have additional synonyms for convenience). We illustrate each * with its nominal effect on a rectangle with vertices labelled A, B, C and D. * * \sa https://en.wikipedia.org/wiki/Examples_of_groups#dihedral_group_of_order_8 * * The set of 2D plane transforms is also known as the symmetry group of a * square, described in the link. Note that the group can be generated by * only 2 elements (the horizontal flip and a 90 degree rotation, for * example), however, the encoding used here makes the presence of the vertical * flip explicit. * * \var Transform::Identity * * Identity transform. ~~~ A-B A-B Input image | | goes to output image | | C-D C-D ~~~ * Numeric value: 0 (no bits set). * * \var Transform::Rot0 * * Synonym for Transform::Identity (zero degree rotation). *


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