The V4L2 compatibility layer only uses the fmt.pix field of curV4L2Format_. There's no need to cache the full v4l2_format, store v4l2_pix_format only and rename the member variable from curV4L2Format_ to v4l2PixFormat_. While at it, group the V4L2-related member variables together in the V4L2CameraProxy class. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
|
|
/*
|
|
* Copyright (C) 2019, Google Inc.
|
|
*
|
|
* v4l2_camera_proxy.h - Proxy to V4L2 compatibility camera
|
|
*/
|
|
|
|
#ifndef __V4L2_CAMERA_PROXY_H__
|
|
#define __V4L2_CAMERA_PROXY_H__
|
|
|
|
#include <linux/videodev2.h>
|
|
#include <map>
|
|
#include <memory>
|
|
#include <set>
|
|
#include <sys/mman.h>
|
|
#include <sys/types.h>
|
|
#include <vector>
|
|
|
|
#include <libcamera/camera.h>
|
|
|
|
#include "v4l2_camera.h"
|
|
|
|
using namespace libcamera;
|
|
|
|
class V4L2CameraFile;
|
|
|
|
class V4L2CameraProxy
|
|
{
|
|
public:
|
|
V4L2CameraProxy(unsigned int index, std::shared_ptr<Camera> camera);
|
|
|
|
int open(V4L2CameraFile *file);
|
|
void close(V4L2CameraFile *file);
|
|
void *mmap(void *addr, size_t length, int prot, int flags, off64_t offset);
|
|
int munmap(void *addr, size_t length);
|
|
|
|
int ioctl(V4L2CameraFile *file, unsigned long request, void *arg);
|
|
|
|
private:
|
|
bool validateBufferType(uint32_t type);
|
|
bool validateMemoryType(uint32_t memory);
|
|
void setFmtFromConfig(const StreamConfiguration &streamConfig);
|
|
void querycap(std::shared_ptr<Camera> camera);
|
|
int tryFormat(struct v4l2_format *arg);
|
|
enum v4l2_priority maxPriority();
|
|
void updateBuffers();
|
|
void freeBuffers();
|
|
|
|
int vidioc_querycap(struct v4l2_capability *arg);
|
|
int vidioc_enum_framesizes(V4L2CameraFile *file, struct v4l2_frmsizeenum *arg);
|
|
int vidioc_enum_fmt(V4L2CameraFile *file, struct v4l2_fmtdesc *arg);
|
|
int vidioc_g_fmt(V4L2CameraFile *file, struct v4l2_format *arg);
|
|
int vidioc_s_fmt(V4L2CameraFile *file, struct v4l2_format *arg);
|
|
int vidioc_try_fmt(V4L2CameraFile *file, struct v4l2_format *arg);
|
|
int vidioc_g_priority(V4L2CameraFile *file, enum v4l2_priority *arg);
|
|
int vidioc_s_priority(V4L2CameraFile *file, enum v4l2_priority *arg);
|
|
int vidioc_enuminput(V4L2CameraFile *file, struct v4l2_input *arg);
|
|
int vidioc_g_input(V4L2CameraFile *file, int *arg);
|
|
int vidioc_s_input(V4L2CameraFile *file, int *arg);
|
|
int vidioc_reqbufs(V4L2CameraFile *file, struct v4l2_requestbuffers *arg);
|
|
int vidioc_querybuf(V4L2CameraFile *file, struct v4l2_buffer *arg);
|
|
int vidioc_qbuf(V4L2CameraFile *file, struct v4l2_buffer *arg);
|
|
int vidioc_dqbuf(V4L2CameraFile *file, struct v4l2_buffer *arg, MutexLocker *locker);
|
|
int vidioc_streamon(V4L2CameraFile *file, int *arg);
|
|
int vidioc_streamoff(V4L2CameraFile *file, int *arg);
|
|
|
|
bool hasOwnership(V4L2CameraFile *file);
|
|
int acquire(V4L2CameraFile *file);
|
|
void release(V4L2CameraFile *file);
|
|
|
|
static const std::set<unsigned long> supportedIoctls_;
|
|
|
|
unsigned int refcount_;
|
|
unsigned int index_;
|
|
|
|
StreamConfiguration streamConfig_;
|
|
unsigned int bufferCount_;
|
|
unsigned int currentBuf_;
|
|
unsigned int sizeimage_;
|
|
|
|
struct v4l2_capability capabilities_;
|
|
struct v4l2_pix_format v4l2PixFormat_;
|
|
|
|
std::vector<struct v4l2_buffer> buffers_;
|
|
std::map<void *, unsigned int> mmaps_;
|
|
|
|
std::set<V4L2CameraFile *> files_;
|
|
|
|
std::unique_ptr<V4L2Camera> vcam_;
|
|
|
|
/*
|
|
* This is the exclusive owner of this V4L2CameraProxy instance.
|
|
* When there is no owner, anybody can call any ioctl before reqbufs.
|
|
* The first file to call reqbufs with count > 0 or s_fmt will become
|
|
* the owner, and when the owner calls reqbufs with count = 0 it will
|
|
* release ownership. Any buffer-related ioctl (except querybuf) or
|
|
* s_fmt that is called by a non-owner while there exists an owner
|
|
* will return -EBUSY.
|
|
*/
|
|
V4L2CameraFile *owner_;
|
|
|
|
/* This mutex is to serialize access to the proxy. */
|
|
Mutex proxyMutex_;
|
|
};
|
|
|
|
#endif /* __V4L2_CAMERA_PROXY_H__ */
|