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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
 */

#pragma once

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

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

#include <libcamera/base/class.h>
#include <libcamera/base/mutex.h>

#include <libcamera/camera_manager.h>

#include "camera_hal_config.h"

class CameraDevice;

class CameraHalManager
{
public:
	~CameraHalManager();

	static CameraHalManager *instance();

	int init();

	std::tuple<CameraDevice *, int>
	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:
	LIBCAMERA_DISABLE_COPY_AND_MOVE(CameraHalManager)

	static constexpr unsigned int firstExternalCameraId_ = 1000;

	CameraHalManager();

	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_TSA_REQUIRES(mutex_);

	std::unique_ptr<libcamera::CameraManager> cameraManager_;
	CameraHalConfig halConfig_;

	const camera_module_callbacks_t *callbacks_;
	std::vector<std::unique_ptr<CameraDevice>> cameras_ LIBCAMERA_TSA_GUARDED_BY(mutex_);
	std::map<std::string, unsigned int> cameraIdsMap_ LIBCAMERA_TSA_GUARDED_BY(mutex_);
	libcamera::Mutex mutex_;

	unsigned int numInternalCameras_;
	unsigned int nextExternalCameraId_;
};
"> * The message is delivered in the context of the object's thread, through the * Object::message() virtual method. After delivery the message is * automatically deleted. */ namespace libcamera { LOG_DEFINE_CATEGORY(Message) std::atomic_uint Message::nextUserType_{ Message::UserMessage }; /** * \class Message * \brief A message that can be posted to a Thread */ /** * \enum Message::Type * \brief The message type * \var Message::None * \brief Invalid message type * \var Message::InvokeMessage * \brief Asynchronous method invocation across threads * \var Message::ThreadMoveMessage * \brief Object is being moved to a different thread * \var Message::DeferredDelete * \brief Object is scheduled for deletion * \var Message::UserMessage * \brief First value available for user-defined messages */ /** * \brief Construct a message object of type \a type * \param[in] type The message type */ Message::Message(Message::Type type) : type_(type) { } Message::~Message() { } /** * \fn Message::type() * \brief Retrieve the message type * \return The message type */ /** * \fn Message::receiver() * \brief Retrieve the message receiver * \return The message receiver */ /** * \brief Reserve and register a custom user-defined message type * * Custom message types use values starting at Message::UserMessage. Assigning * custom types manually may lead to accidental duplicated types. To avoid this * problem, this method reserves and returns the next available user-defined * message type. * * The recommended way to use this method is to subclass Message and provide a * static accessor for the custom message type. * * \code{.cpp} * class MyCustomMessage : public Message * { * public: * MyCustomMessage() : Message(type()) {} * * static Message::Type type() * { * static MessageType type = registerMessageType(); * return type; * } * }; * \endcode * * \return A new unique message type */ Message::Type Message::registerMessageType() { return static_cast<Message::Type>(nextUserType_++); } /** * \class InvokeMessage * \brief A message carrying a method invocation across threads */ /** * \brief Construct an InvokeMessage for method invocation on an Object * \param[in] method The bound method * \param[in] pack The packed method arguments * \param[in] semaphore The semaphore used to signal message delivery * \param[in] deleteMethod True to delete the \a method when the message is * destroyed */ InvokeMessage::InvokeMessage(BoundMethodBase *method, std::shared_ptr<BoundMethodPackBase> pack, Semaphore *semaphore, bool deleteMethod) : Message(Message::InvokeMessage), method_(method), pack_(pack), semaphore_(semaphore), deleteMethod_(deleteMethod) { } InvokeMessage::~InvokeMessage() { if (deleteMethod_) delete method_; } /** * \fn InvokeMessage::semaphore() * \brief Retrieve the message semaphore passed to the constructor * \return The message semaphore */ /** * \brief Invoke the method bound to InvokeMessage::method_ with arguments * InvokeMessage::pack_ */ void InvokeMessage::invoke() { method_->invokePack(pack_.get()); } /** * \var InvokeMessage::method_ * \brief The method to be invoked */ /** * \var InvokeMessage::pack_ * \brief The packed method invocation arguments */ } /* namespace libcamera */