fdf1851f0b
Remove the need for callers to reference PROT_READ/PROT_WRITE directly from <sys/mman.h> by instead exposing the Read/Write mapping options as flags from the MappedFrameBuffer class itself. While here, introduce the <stdint.h> header which is required for the uint8_t as part of the Plane. Reviewed-by: Hirokazu Honda <hiroh@chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
64 lines
1.3 KiB
C++
64 lines
1.3 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
|
|
/*
|
|
* Copyright (C) 2021, Google Inc.
|
|
*
|
|
* mapped_framebuffer.h - Frame buffer memory mapping support
|
|
*/
|
|
#ifndef __LIBCAMERA_INTERNAL_MAPPED_FRAMEBUFFER_H__
|
|
#define __LIBCAMERA_INTERNAL_MAPPED_FRAMEBUFFER_H__
|
|
|
|
#include <stdint.h>
|
|
#include <vector>
|
|
|
|
#include <libcamera/base/class.h>
|
|
#include <libcamera/base/flags.h>
|
|
#include <libcamera/base/span.h>
|
|
|
|
#include <libcamera/framebuffer.h>
|
|
|
|
namespace libcamera {
|
|
|
|
class MappedBuffer
|
|
{
|
|
public:
|
|
using Plane = Span<uint8_t>;
|
|
|
|
~MappedBuffer();
|
|
|
|
MappedBuffer(MappedBuffer &&other);
|
|
MappedBuffer &operator=(MappedBuffer &&other);
|
|
|
|
bool isValid() const { return error_ == 0; }
|
|
int error() const { return error_; }
|
|
const std::vector<Plane> &maps() const { return maps_; }
|
|
|
|
protected:
|
|
MappedBuffer();
|
|
|
|
int error_;
|
|
std::vector<Plane> maps_;
|
|
|
|
private:
|
|
LIBCAMERA_DISABLE_COPY(MappedBuffer)
|
|
};
|
|
|
|
class MappedFrameBuffer : public MappedBuffer
|
|
{
|
|
public:
|
|
enum class MapFlag {
|
|
Read = 1 << 0,
|
|
Write = 1 << 1,
|
|
ReadWrite = Read | Write,
|
|
};
|
|
|
|
using MapFlags = Flags<MapFlag>;
|
|
|
|
MappedFrameBuffer(const FrameBuffer *buffer, MapFlags flags);
|
|
};
|
|
|
|
LIBCAMERA_FLAGS_ENABLE_OPERATORS(MappedFrameBuffer::MapFlag)
|
|
|
|
} /* namespace libcamera */
|
|
|
|
#endif /* __LIBCAMERA_INTERNAL_MAPPED_FRAMEBUFFER_H__ */
|