mirror of
https://git.libcamera.org/libcamera/libcamera.git
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eb4030f6c0
The FrameBuffer interface is based on the idea that all buffers are allocated externally to libcamera and are only used by it. This is meant to create a simpler API centered around usage of buffers, regardless of where they come from. Linux however lacks a centralized allocator at the moment, and not all users of libcamera are expected to use another device that could provide suitable buffers for the camera. This patch thus adds a helper class to allocate buffers internally in libcamera, in a way that matches the needs of the FrameBuffer-based API. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
45 lines
1 KiB
C++
45 lines
1 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2019, Google Inc.
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*
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* framebuffer_allocator.h - FrameBuffer allocator
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*/
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#ifndef __LIBCAMERA_FRAMEBUFFER_ALLOCATOR_H__
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#define __LIBCAMERA_FRAMEBUFFER_ALLOCATOR_H__
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#include <map>
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#include <memory>
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#include <vector>
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namespace libcamera {
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class Camera;
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class FrameBuffer;
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class Stream;
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class FrameBufferAllocator
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{
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public:
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static FrameBufferAllocator *create(std::shared_ptr<Camera> camera);
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FrameBufferAllocator(const Camera &) = delete;
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FrameBufferAllocator &operator=(const Camera &) = delete;
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~FrameBufferAllocator();
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int allocate(Stream *stream);
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int free(Stream *stream);
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bool allocated() const { return !buffers_.empty(); }
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const std::vector<std::unique_ptr<FrameBuffer>> &buffers(Stream *stream) const;
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private:
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FrameBufferAllocator(std::shared_ptr<Camera> camera);
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std::shared_ptr<Camera> camera_;
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std::map<Stream *, std::vector<std::unique_ptr<FrameBuffer>>> buffers_;
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};
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} /* namespace libcamera */
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#endif /* __LIBCAMERA_FRAMEBUFFER_ALLOCATOR_H__ */
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