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https://git.libcamera.org/libcamera/libcamera.git
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3c4b872443
In the upcoming FrameBuffer API the memory mapping of buffers will be left to the user of the FrameBuffer objects. Prepare the V4L2 compatibility layer to this upcoming change to ease conversion to the new API. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
82 lines
2.2 KiB
C++
82 lines
2.2 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2019, Google Inc.
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*
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* v4l2_camera_proxy.h - Proxy to V4L2 compatibility camera
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*/
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#ifndef __V4L2_CAMERA_PROXY_H__
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#define __V4L2_CAMERA_PROXY_H__
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#include <linux/videodev2.h>
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#include <map>
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#include <memory>
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#include <sys/types.h>
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#include <vector>
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#include <libcamera/camera.h>
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#include "v4l2_camera.h"
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using namespace libcamera;
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class V4L2CameraProxy
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{
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public:
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V4L2CameraProxy(unsigned int index, std::shared_ptr<Camera> camera);
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int open(bool nonBlocking);
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void dup();
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void close();
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void *mmap(void *addr, size_t length, int prot, int flags, off_t offset);
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int munmap(void *addr, size_t length);
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int ioctl(unsigned long request, void *arg);
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private:
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bool validateBufferType(uint32_t type);
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bool validateMemoryType(uint32_t memory);
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void setFmtFromConfig(StreamConfiguration &streamConfig);
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unsigned int calculateSizeImage(StreamConfiguration &streamConfig);
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void querycap(std::shared_ptr<Camera> camera);
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void tryFormat(struct v4l2_format *arg);
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void updateBuffers();
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int freeBuffers();
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int vidioc_querycap(struct v4l2_capability *arg);
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int vidioc_enum_fmt(struct v4l2_fmtdesc *arg);
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int vidioc_g_fmt(struct v4l2_format *arg);
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int vidioc_s_fmt(struct v4l2_format *arg);
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int vidioc_try_fmt(struct v4l2_format *arg);
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int vidioc_reqbufs(struct v4l2_requestbuffers *arg);
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int vidioc_querybuf(struct v4l2_buffer *arg);
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int vidioc_qbuf(struct v4l2_buffer *arg);
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int vidioc_dqbuf(struct v4l2_buffer *arg);
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int vidioc_streamon(int *arg);
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int vidioc_streamoff(int *arg);
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static unsigned int bplMultiplier(uint32_t format);
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static unsigned int imageSize(uint32_t format, unsigned int width,
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unsigned int height);
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static PixelFormat v4l2ToDrm(uint32_t format);
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static uint32_t drmToV4L2(PixelFormat format);
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unsigned int refcount_;
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unsigned int index_;
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bool nonBlocking_;
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struct v4l2_format curV4L2Format_;
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StreamConfiguration streamConfig_;
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struct v4l2_capability capabilities_;
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unsigned int bufferCount_;
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unsigned int currentBuf_;
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unsigned int sizeimage_;
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std::vector<struct v4l2_buffer> buffers_;
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std::map<void *, unsigned int> mmaps_;
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std::unique_ptr<V4L2Camera> vcam_;
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};
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#endif /* __V4L2_CAMERA_PROXY_H__ */
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