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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2018, Google Inc.
*
* camera.h - Camera object interface
*/
#ifndef __LIBCAMERA_CAMERA_H__
#define __LIBCAMERA_CAMERA_H__
#include <map>
#include <memory>
#include <set>
#include <string>
#include <libcamera/request.h>
#include <libcamera/signal.h>
#include <libcamera/stream.h>
namespace libcamera {
class Buffer;
class PipelineHandler;
class Request;
class CameraConfiguration
{
public:
using iterator = std::vector<Stream *>::iterator;
using const_iterator = std::vector<Stream *>::const_iterator;
CameraConfiguration();
iterator begin();
iterator end();
const_iterator begin() const;
const_iterator end() const;
bool isValid() const;
bool isEmpty() const;
std::size_t size() const;
Stream *front();
const Stream *front() const;
Stream *operator[](unsigned int index) const;
StreamConfiguration &operator[](Stream *stream);
const StreamConfiguration &operator[](Stream *stream) const;
private:
std::vector<Stream *> order_;
std::map<Stream *, StreamConfiguration> config_;
};
class Camera final
{
public:
static std::shared_ptr<Camera> create(PipelineHandler *pipe,
const std::string &name,
const std::set<Stream *> &streams);
Camera(const Camera &) = delete;
Camera &operator=(const Camera &) = delete;
const std::string &name() const;
Signal<Request *, Buffer *> bufferCompleted;
Signal<Request *, const std::map<Stream *, Buffer *> &> requestCompleted;
Signal<Camera *> disconnected;
int acquire();
int release();
const std::set<Stream *> &streams() const;
CameraConfiguration generateConfiguration(const StreamRoles &roles);
int configure(const CameraConfiguration &config);
int allocateBuffers();
int freeBuffers();
Request *createRequest();
int queueRequest(Request *request);
int start();
int stop();
private:
enum State {
CameraAvailable,
CameraAcquired,
CameraConfigured,
CameraPrepared,
CameraRunning,
};
Camera(PipelineHandler *pipe, const std::string &name);
~Camera();
bool stateBetween(State low, State high) const;
bool stateIs(State state) const;
friend class PipelineHandler;
void disconnect();
void requestComplete(Request *request);
std::shared_ptr<PipelineHandler> pipe_;
std::string name_;
std::set<Stream *> streams_;
std::set<Stream *> activeStreams_;
bool disconnected_;
State state_;
};
} /* namespace libcamera */
#endif /* __LIBCAMERA_CAMERA_H__ */
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