b3383da79f
Provide a MappedFrameBuffer helper class which will map all of the Planes within a FrameBuffer and provide CPU addressable pointers for those planes. The MappedFrameBuffer implements the interface of the MappedBuffer allowing other buffer types to be constructed of the same form, with a common interface and cleanup. This allows MappedBuffer instances to be created from Camera3Buffer types. Mappings are removed upon destruction. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
47 lines
910 B
C++
47 lines
910 B
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2020, Google Inc.
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*
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* buffer.h - Internal buffer handling
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*/
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#ifndef __LIBCAMERA_INTERNAL_BUFFER_H__
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#define __LIBCAMERA_INTERNAL_BUFFER_H__
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#include <sys/mman.h>
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#include <vector>
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#include <libcamera/buffer.h>
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#include <libcamera/span.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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const std::vector<Plane> &maps() const { return maps_; }
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protected:
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MappedBuffer();
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int error_;
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std::vector<Plane> maps_;
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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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MappedFrameBuffer(const FrameBuffer *buffer, int flags);
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};
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} /* namespace libcamera */
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#endif /* __LIBCAMERA_INTERNAL_BUFFER_H__ */
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