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path: root/src/android/camera_hal_manager.h
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * camera_hal_manager.h - libcamera Android Camera Manager
 */
#ifndef __ANDROID_CAMERA_MANAGER_H__
#define __ANDROID_CAMERA_MANAGER_H__

#include <map>
#include <mutex>
#include <stddef.h>
#include <vector>

#include <hardware/camera_common.h>
#include <hardware/hardware.h>
#include <system/camera_metadata.h>

#include <libcamera/camera_manager.h>

class CameraDevice;

class CameraHalManager
{
public:
	CameraHalManager();
	~CameraHalManager();

	int init();

	CameraDevice *open(unsigned int id, const hw_module_t *module);

	unsigned int numCameras() const;
	int getCameraInfo(unsigned int id, struct camera_info *info);
	void setCallbacks(const camera_module_callbacks_t *callbacks);

private:
	using Mutex = std::mutex;
	using MutexLocker = std::unique_lock<std::mutex>;

	static constexpr unsigned int firstExternalCameraId_ = 1000;

	static int32_t cameraLocation(const libcamera::Camera *cam);

	void cameraAdded(std::shared_ptr<libcamera::Camera> cam);
	void cameraRemoved(std::shared_ptr<libcamera::Camera> cam);

	CameraDevice *cameraDeviceFromHalId(unsigned int id);

	libcamera::CameraManager *cameraManager_;

	const camera_module_callbacks_t *callbacks_;
	std::vector<std::shared_ptr<CameraDevice>> cameras_;
	std::map<std::string, unsigned int> cameraIdsMap_;
	Mutex mutex_;

	unsigned int numInternalCameras_;
	unsigned int nextExternalCameraId_;
};

#endif /* __ANDROID_CAMERA_MANAGER_H__ */
pt">> camera, CameraConfiguration *config) : camera_(camera), config_(config), writer_(nullptr) { } int Capture::run(EventLoop *loop, const OptionsParser::Options &options) { int ret; if (!camera_) { std::cout << "Can't capture without a camera" << std::endl; return -ENODEV; } ret = camera_->configure(config_); if (ret < 0) { std::cout << "Failed to configure camera" << std::endl; return ret; } streamName_.clear(); for (unsigned int index = 0; index < config_->size(); ++index) { StreamConfiguration &cfg = config_->at(index); streamName_[cfg.stream()] = "stream" + std::to_string(index); } camera_->requestCompleted.connect(this, &Capture::requestComplete); if (options.isSet(OptFile)) { if (!options[OptFile].toString().empty()) writer_ = new BufferWriter(options[OptFile]); else writer_ = new BufferWriter(); } FrameBufferAllocator *allocator = new FrameBufferAllocator(camera_); ret = capture(loop, allocator); if (options.isSet(OptFile)) { delete writer_; writer_ = nullptr; } delete allocator; return ret; } int Capture::capture(EventLoop *loop, FrameBufferAllocator *allocator) { int ret; /* Identify the stream with the least number of buffers. */ unsigned int nbuffers = UINT_MAX; for (StreamConfiguration &cfg : *config_) { ret = allocator->allocate(cfg.stream()); if (ret < 0) { std::cerr << "Can't allocate buffers" << std::endl; return -ENOMEM; } unsigned int allocated = allocator->buffers(cfg.stream()).size(); nbuffers = std::min(nbuffers, allocated); } /* * TODO: make cam tool smarter to support still capture by for * example pushing a button. For now run all streams all the time. */ std::vector<Request *> requests; for (unsigned int i = 0; i < nbuffers; i++) { Request *request = camera_->createRequest(); if (!request) { std::cerr << "Can't create request" << std::endl; return -ENOMEM; } for (StreamConfiguration &cfg : *config_) { Stream *stream = cfg.stream(); const std::vector<std::unique_ptr<FrameBuffer>> &buffers = allocator->buffers(stream); const std::unique_ptr<FrameBuffer> &buffer = buffers[i]; ret = request->addBuffer(stream, buffer.get()); if (ret < 0) { std::cerr << "Can't set buffer for request" << std::endl; return ret; } if (writer_) writer_->mapBuffer(buffer.get()); } requests.push_back(request); } ret = camera_->start(); if (ret) { std::cout << "Failed to start capture" << std::endl; return ret; } for (Request *request : requests) { ret = camera_->queueRequest(request); if (ret < 0) { std::cerr << "Can't queue request" << std::endl; camera_->stop(); return ret; } } std::cout << "Capture until user interrupts by SIGINT" << std::endl;