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https://git.libcamera.org/libcamera/libcamera.git
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7a34707bfd
Add to the FrameBuffer::Private class a unique pointer to a Fence. The Fence will be used to signal the availability of the Framebuffer for incoming data transfer. The Fence will be associated to a FrameBuffer at Request::addBuffer() time, and if correctly signalled, reset by the core at Request queue time. If a FrameBuffer completes with errors, due to a Fence wait failure, the Fence will still be owned by the FrameBuffer and it is application responsibility to correctly reset it before reusing the buffer. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
88 lines
1.8 KiB
C++
88 lines
1.8 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2019, Google Inc.
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*
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* framebuffer.h - Frame buffer handling
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*/
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#pragma once
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#include <assert.h>
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#include <limits>
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#include <memory>
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#include <stdint.h>
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#include <vector>
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#include <libcamera/base/class.h>
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#include <libcamera/base/shared_fd.h>
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#include <libcamera/base/span.h>
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namespace libcamera {
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class Fence;
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class Request;
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struct FrameMetadata {
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enum Status {
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FrameSuccess,
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FrameError,
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FrameCancelled,
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};
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struct Plane {
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unsigned int bytesused;
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};
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Status status;
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unsigned int sequence;
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uint64_t timestamp;
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Span<Plane> planes() { return planes_; }
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Span<const Plane> planes() const { return planes_; }
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private:
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friend class FrameBuffer;
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std::vector<Plane> planes_;
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};
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class FrameBuffer final : public Extensible
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{
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LIBCAMERA_DECLARE_PRIVATE()
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public:
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struct Plane {
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static constexpr unsigned int kInvalidOffset = std::numeric_limits<unsigned int>::max();
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SharedFD fd;
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unsigned int offset = kInvalidOffset;
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unsigned int length;
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};
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FrameBuffer(const std::vector<Plane> &planes, unsigned int cookie = 0);
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FrameBuffer(std::unique_ptr<Private> d,
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const std::vector<Plane> &planes, unsigned int cookie = 0);
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const std::vector<Plane> &planes() const { return planes_; }
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Request *request() const;
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const FrameMetadata &metadata() const { return metadata_; }
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unsigned int cookie() const { return cookie_; }
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void setCookie(unsigned int cookie) { cookie_ = cookie; }
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std::unique_ptr<Fence> releaseFence();
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void cancel() { metadata_.status = FrameMetadata::FrameCancelled; }
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private:
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LIBCAMERA_DISABLE_COPY_AND_MOVE(FrameBuffer)
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friend class V4L2VideoDevice; /* Needed to update metadata_. */
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std::vector<Plane> planes_;
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FrameMetadata metadata_;
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unsigned int cookie_;
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};
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} /* namespace libcamera */
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