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Diffstat (limited to 'src/v4l2/v4l2_camera_proxy.h')
-rw-r--r--src/v4l2/v4l2_camera_proxy.h81
1 files changed, 81 insertions, 0 deletions
diff --git a/src/v4l2/v4l2_camera_proxy.h b/src/v4l2/v4l2_camera_proxy.h
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+++ b/src/v4l2/v4l2_camera_proxy.h
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+/* SPDX-License-Identifier: GPL-2.0-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 <sys/types.h>
+#include <vector>
+
+#include <libcamera/camera.h>
+
+#include "v4l2_camera.h"
+
+using namespace libcamera;
+
+class V4L2CameraProxy
+{
+public:
+ V4L2CameraProxy(unsigned int index, std::shared_ptr<Camera> camera);
+
+ int open(bool nonBlocking);
+ void dup();
+ void close();
+ void *mmap(size_t length, int prot, int flags, off_t offset);
+ int munmap(void *addr, size_t length);
+
+ int ioctl(unsigned long request, void *arg);
+
+private:
+ bool validateBufferType(uint32_t type);
+ bool validateMemoryType(uint32_t memory);
+ void setFmtFromConfig(StreamConfiguration &streamConfig);
+ unsigned int calculateSizeImage(StreamConfiguration &streamConfig);
+ void querycap(std::shared_ptr<Camera> camera);
+ void updateBuffers();
+ int freeBuffers();
+
+ int vidioc_querycap(struct v4l2_capability *arg);
+ int vidioc_enum_fmt(struct v4l2_fmtdesc *arg);
+ int vidioc_g_fmt(struct v4l2_format *arg);
+ int vidioc_s_fmt(struct v4l2_format *arg);
+ int vidioc_try_fmt(struct v4l2_format *arg);
+ int vidioc_reqbufs(struct v4l2_requestbuffers *arg);
+ int vidioc_querybuf(struct v4l2_buffer *arg);
+ int vidioc_qbuf(struct v4l2_buffer *arg);
+ int vidioc_dqbuf(struct v4l2_buffer *arg);
+ int vidioc_streamon(int *arg);
+ int vidioc_streamoff(int *arg);
+
+ static int bplMultiplier(unsigned int format);
+ static int imageSize(unsigned int format, unsigned int width,
+ unsigned int height);
+
+ static unsigned int v4l2ToDrm(unsigned int pixelformat);
+ static unsigned int drmToV4L2(unsigned int pixelformat);
+
+ unsigned int refcount_;
+ unsigned int index_;
+ bool nonBlocking_;
+
+ struct v4l2_format curV4L2Format_;
+ StreamConfiguration streamConfig_;
+ struct v4l2_capability capabilities_;
+ unsigned int bufferCount_;
+ unsigned int currentBuf_;
+ unsigned int sizeimage_;
+
+ std::vector<struct v4l2_buffer> buffers_;
+ std::map<void *, unsigned int> mmaps_;
+
+ std::unique_ptr<V4L2Camera> vcam_;
+};
+
+#endif /* __V4L2_CAMERA_PROXY_H__ */