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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2018, Google Inc.
*
* pipeline_handler.h - Pipeline handler infrastructure
*/
#pragma once
#include <memory>
#include <queue>
#include <set>
#include <string>
#include <sys/types.h>
#include <vector>
#include <libcamera/base/mutex.h>
#include <libcamera/base/object.h>
#include <libcamera/controls.h>
#include <libcamera/stream.h>
#include "libcamera/internal/ipa_proxy.h"
namespace libcamera {
class Camera;
class CameraConfiguration;
class CameraManager;
class DeviceEnumerator;
class DeviceMatch;
class FrameBuffer;
class MediaDevice;
class PipelineHandler;
class Request;
class PipelineHandler : public std::enable_shared_from_this<PipelineHandler>,
public Object
{
public:
PipelineHandler(CameraManager *manager);
virtual ~PipelineHandler();
virtual bool match(DeviceEnumerator *enumerator) = 0;
MediaDevice *acquireMediaDevice(DeviceEnumerator *enumerator,
const DeviceMatch &dm);
bool acquire();
void release(Camera *camera);
virtual std::unique_ptr<CameraConfiguration> generateConfiguration(Camera *camera,
const StreamRoles &roles) = 0;
virtual int configure(Camera *camera, CameraConfiguration *config) = 0;
virtual int exportFrameBuffers(Camera *camera, Stream *stream,
std::vector<std::unique_ptr<FrameBuffer>> *buffers) = 0;
virtual int start(Camera *camera, const ControlList *controls) = 0;
void stop(Camera *camera);
bool hasPendingRequests(const Camera *camera) const;
void registerRequest(Request *request);
void queueRequest(Request *request);
bool completeBuffer(Request *request, FrameBuffer *buffer);
void completeRequest(Request *request);
const char *name() const { return name_; }
protected:
void registerCamera(std::shared_ptr<Camera> camera);
void hotplugMediaDevice(MediaDevice *media);
virtual int queueRequestDevice(Camera *camera, Request *request) = 0;
virtual void stopDevice(Camera *camera) = 0;
virtual void releaseDevice(Camera *camera);
CameraManager *manager_;
private:
void unlockMediaDevices();
void mediaDeviceDisconnected(MediaDevice *media);
virtual void disconnect();
void doQueueRequest(Request *request);
void doQueueRequests();
std::vector<std::shared_ptr<MediaDevice>> mediaDevices_;
std::vector<std::weak_ptr<Camera>> cameras_;
std::queue<Request *> waitingRequests_;
const char *name_;
Mutex lock_;
unsigned int useCount_ LIBCAMERA_TSA_GUARDED_BY(lock_);
friend class PipelineHandlerFactoryBase;
};
class PipelineHandlerFactoryBase
{
public:
PipelineHandlerFactoryBase(const char *name);
virtual ~PipelineHandlerFactoryBase() = default;
std::shared_ptr<PipelineHandler> create(CameraManager *manager) const;
const std::string &name() const { return name_; }
static std::vector<PipelineHandlerFactoryBase *> &factories();
private:
static void registerType(PipelineHandlerFactoryBase *factory);
virtual std::unique_ptr<PipelineHandler>
createInstance(CameraManager *manager) const = 0;
std::string name_;
};
template<typename _PipelineHandler>
class PipelineHandlerFactory final : public PipelineHandlerFactoryBase
{
public:
PipelineHandlerFactory(const char *name)
: PipelineHandlerFactoryBase(name)
{
}
std::unique_ptr<PipelineHandler>
createInstance(CameraManager *manager) const override
{
return std::make_unique<_PipelineHandler>(manager);
}
};
#define REGISTER_PIPELINE_HANDLER(handler) \
static PipelineHandlerFactory<handler> global_##handler##Factory(#handler);
} /* namespace libcamera */
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