8708904fad
MappedBuffer::maps() returns std::vector<MappedBuffer::Plane>. Plane has the address, but the address points the beginning of the buffer containing the plane. This makes the Plane point the beginning of the plane. So MappedBuffer::maps()[i].data() returns the address of i-th plane. Signed-off-by: Hirokazu Honda <hiroh@chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
66 lines
1.3 KiB
C++
66 lines
1.3 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2021, Google Inc.
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*
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* mapped_framebuffer.h - Frame buffer memory mapping support
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*/
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#ifndef __LIBCAMERA_INTERNAL_MAPPED_FRAMEBUFFER_H__
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#define __LIBCAMERA_INTERNAL_MAPPED_FRAMEBUFFER_H__
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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/flags.h>
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#include <libcamera/base/span.h>
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#include <libcamera/framebuffer.h>
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namespace libcamera {
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class MappedBuffer
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{
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public:
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using Plane = Span<uint8_t>;
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~MappedBuffer();
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MappedBuffer(MappedBuffer &&other);
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MappedBuffer &operator=(MappedBuffer &&other);
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bool isValid() const { return error_ == 0; }
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int error() const { return error_; }
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/* \todo rename to planes(). */
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const std::vector<Plane> &maps() const { return planes_; }
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protected:
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MappedBuffer();
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int error_;
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std::vector<Plane> planes_;
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std::vector<Plane> maps_;
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private:
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LIBCAMERA_DISABLE_COPY(MappedBuffer)
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};
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class MappedFrameBuffer : public MappedBuffer
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{
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public:
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enum class MapFlag {
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Read = 1 << 0,
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Write = 1 << 1,
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ReadWrite = Read | Write,
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};
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using MapFlags = Flags<MapFlag>;
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MappedFrameBuffer(const FrameBuffer *buffer, MapFlags flags);
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};
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LIBCAMERA_FLAGS_ENABLE_OPERATORS(MappedFrameBuffer::MapFlag)
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} /* namespace libcamera */
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#endif /* __LIBCAMERA_INTERNAL_MAPPED_FRAMEBUFFER_H__ */
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