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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* v4l2_camera.h - V4L2 compatibility camera
*/
#pragma once
#include <deque>
#include <utility>
#include <libcamera/base/mutex.h>
#include <libcamera/base/semaphore.h>
#include <libcamera/base/shared_fd.h>
#include <libcamera/camera.h>
#include <libcamera/framebuffer.h>
#include <libcamera/framebuffer_allocator.h>
class V4L2Camera
{
public:
struct Buffer {
Buffer(unsigned int index, const libcamera::FrameMetadata &data)
: index_(index), data_(data)
{
}
unsigned int index_;
libcamera::FrameMetadata data_;
};
V4L2Camera(std::shared_ptr<libcamera::Camera> camera);
~V4L2Camera();
int open(libcamera::StreamConfiguration *streamConfig);
void close();
void bind(int efd);
void unbind();
std::vector<Buffer> completedBuffers();
int configure(libcamera::StreamConfiguration *streamConfigOut,
const libcamera::Size &size,
const libcamera::PixelFormat &pixelformat,
unsigned int bufferCount);
int validateConfiguration(const libcamera::PixelFormat &pixelformat,
const libcamera::Size &size,
libcamera::StreamConfiguration *streamConfigOut);
int allocBuffers(unsigned int count);
void freeBuffers();
int getBufferFd(unsigned int index);
int streamOn();
int streamOff();
int qbuf(unsigned int index);
void waitForBufferAvailable();
bool isBufferAvailable();
bool isRunning();
private:
void requestComplete(libcamera::Request *request);
std::shared_ptr<libcamera::Camera> camera_;
std::unique_ptr<libcamera::CameraConfiguration> config_;
bool isRunning_;
libcamera::Mutex bufferLock_;
libcamera::FrameBufferAllocator *bufferAllocator_;
std::vector<std::unique_ptr<libcamera::Request>> requestPool_;
std::deque<libcamera::Request *> pendingRequests_;
std::deque<std::unique_ptr<Buffer>> completedBuffers_;
int efd_;
libcamera::Mutex bufferMutex_;
libcamera::ConditionVariable bufferCV_;
unsigned int bufferAvailableCount_;
};
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