168488275a
Add a helper function exportBuffers in DmaBufAllocator to make it easier to use. It'll be used in Virtual Pipeline Handler and SoftwareIsp. Signed-off-by: Harvey Yang <chenghaoyang@chromium.org> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2020, Raspberry Pi Ltd
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*
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* Helper class for dma-buf allocations.
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*/
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#pragma once
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#include <memory>
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#include <string>
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#include <vector>
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#include <libcamera/base/flags.h>
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#include <libcamera/base/unique_fd.h>
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namespace libcamera {
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class FrameBuffer;
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class DmaBufAllocator
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{
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public:
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enum class DmaBufAllocatorFlag {
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CmaHeap = 1 << 0,
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SystemHeap = 1 << 1,
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UDmaBuf = 1 << 2,
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};
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using DmaBufAllocatorFlags = Flags<DmaBufAllocatorFlag>;
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DmaBufAllocator(DmaBufAllocatorFlags flags = DmaBufAllocatorFlag::CmaHeap);
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~DmaBufAllocator();
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bool isValid() const { return providerHandle_.isValid(); }
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UniqueFD alloc(const char *name, std::size_t size);
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int exportBuffers(unsigned int count,
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const std::vector<unsigned int> &planeSizes,
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std::vector<std::unique_ptr<FrameBuffer>> *buffers);
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private:
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std::unique_ptr<FrameBuffer> createBuffer(
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std::string name, const std::vector<unsigned int> &planeSizes);
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UniqueFD allocFromHeap(const char *name, std::size_t size);
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UniqueFD allocFromUDmaBuf(const char *name, std::size_t size);
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UniqueFD providerHandle_;
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DmaBufAllocatorFlag type_;
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};
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LIBCAMERA_FLAGS_ENABLE_OPERATORS(DmaBufAllocator::DmaBufAllocatorFlag)
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} /* namespace libcamera */
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