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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* framebuffer.h - Frame buffer handling
*/
#pragma once
#include <assert.h>
#include <limits>
#include <memory>
#include <stdint.h>
#include <vector>
#include <libcamera/base/class.h>
#include <libcamera/base/shared_fd.h>
#include <libcamera/base/span.h>
namespace libcamera {
class Fence;
class Request;
struct FrameMetadata {
enum Status {
FrameSuccess,
FrameError,
FrameCancelled,
};
struct Plane {
unsigned int bytesused;
};
Status status;
unsigned int sequence;
uint64_t timestamp;
Span<Plane> planes() { return planes_; }
Span<const Plane> planes() const { return planes_; }
private:
friend class FrameBuffer;
std::vector<Plane> planes_;
};
class FrameBuffer final : public Extensible
{
LIBCAMERA_DECLARE_PRIVATE()
public:
struct Plane {
static constexpr unsigned int kInvalidOffset = std::numeric_limits<unsigned int>::max();
SharedFD fd;
unsigned int offset = kInvalidOffset;
unsigned int length;
};
FrameBuffer(const std::vector<Plane> &planes, unsigned int cookie = 0);
FrameBuffer(std::unique_ptr<Private> d,
const std::vector<Plane> &planes, unsigned int cookie = 0);
const std::vector<Plane> &planes() const { return planes_; }
Request *request() const;
const FrameMetadata &metadata() const { return metadata_; }
unsigned int cookie() const { return cookie_; }
void setCookie(unsigned int cookie) { cookie_ = cookie; }
std::unique_ptr<Fence> releaseFence();
private:
LIBCAMERA_DISABLE_COPY_AND_MOVE(FrameBuffer)
friend class V4L2VideoDevice; /* Needed to update metadata_. */
std::vector<Plane> planes_;
FrameMetadata metadata_;
unsigned int cookie_;
};
} /* namespace libcamera */
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