libcamera/vivid.git - libcamera pipeline handler for VIVID

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author	Kieran Bingham <kieran.bingham@ideasonboard.com>	2021-09-10 16:49:24 +0100
committer	Kieran Bingham <kieran.bingham@ideasonboard.com>	2021-09-14 12:47:53 +0100
commit	3bcb7a90c1b1404e51015bda9add4d2ba467c052 (patch)
tree	b1e332499eea157d9add3f9ab2e54bd22cc1ca67 /src/qcam/assets/feathericons/refresh-ccw.svg
parent	84acaac8b73ad4740ce0eff45421241f88ea0c7c (diff)

ipa: ipu3: Clear incoming parameter use flags

The incoming params buffer may contain uninitialised data, or the parameters of previously queued frames. Clearing the entire buffer may be an expensive operation, and the kernel will only read from structures which have their associated use-flag set. It is the responsibility of the algorithms to set the use flags accordingly for any data structure they update during prepare(). Clear the use flags of the parameter buffer before passing the buffer to the algorithms during their prepare() operations. Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Tested-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

Diffstat (limited to 'src/qcam/assets/feathericons/refresh-ccw.svg')

0 files changed, 0 insertions, 0 deletions

/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2021, Google Inc. * * mapped_framebuffer.cpp - Mapped Framebuffer support */ #include "libcamera/internal/mapped_framebuffer.h" #include <algorithm> #include <errno.h> #include <map> #include <sys/mman.h> #include <unistd.h> #include <libcamera/base/log.h> /** * \file libcamera/internal/mapped_framebuffer.h * \brief Frame buffer memory mapping support */ namespace libcamera { LOG_DECLARE_CATEGORY(Buffer) /** * \class MappedBuffer * \brief Provide an interface to support managing memory mapped buffers * * The MappedBuffer interface provides access to a set of MappedPlanes which * are available for access by the CPU. * * This class is not meant to be constructed directly, but instead derived * classes should be used to implement the correct mapping of a source buffer. * * This allows treating CPU accessible memory through a generic interface * regardless of whether it originates from a libcamera FrameBuffer or other * source. */ /** * \typedef MappedBuffer::Plane * \brief A mapped region of memory accessible to the CPU * * The MappedBuffer::Plane uses the Span interface to describe the mapped memory * region. */ /** * \brief Construct an empty MappedBuffer */ MappedBuffer::MappedBuffer() : error_(0) { } /** * \brief Move constructor, construct the MappedBuffer with the contents of \a * other using move semantics * \param[in] other The other MappedBuffer * * Moving a MappedBuffer moves the mappings contained in the \a other to the new * MappedBuffer and invalidates the \a other. * * No mappings are unmapped or destroyed in this process. */ MappedBuffer::MappedBuffer(MappedBuffer &&other) { *this = std::move(other); } /** * \brief Move assignment operator, replace the mappings with those of \a other * \param[in] other The other MappedBuffer * * Moving a MappedBuffer moves the mappings contained in the \a other to the new * MappedBuffer and invalidates the \a other. * * No mappings are unmapped or destroyed in this process. */ MappedBuffer &MappedBuffer::operator=(MappedBuffer &&other) { error_ = other.error_; planes_ = std::move(other.planes_); maps_ = std::move(other.maps_); other.error_ = -ENOENT; return *this; } MappedBuffer::~MappedBuffer() { for (Plane &map : maps_) munmap(map.data(), map.size()); } /** * \fn MappedBuffer::isValid() * \brief Check if the MappedBuffer instance is valid * \return True if the MappedBuffer has valid mappings, false otherwise */ /** * \fn MappedBuffer::error() * \brief Retrieve the map error status * * This function retrieves the error status from the MappedBuffer. * The error status is a negative number as defined by errno.h. If * no error occurred, this function returns 0. *


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