camera.h

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2021, Google Inc.
 *
 * Camera private data
 */

#pragma once

#include <atomic>
#include <list>
#include <memory>
#include <set>
#include <stdint.h>
#include <string>

#include <libcamera/base/class.h>

#include <libcamera/camera.h>

namespace libcamera {

class CameraControlValidator;
class PipelineHandler;
class Stream;

class Camera::Private : public Extensible::Private
{
    LIBCAMERA_DECLARE_PUBLIC(Camera)

public:
    Private(PipelineHandler *pipe);
    ~Private();

    PipelineHandler *pipe() { return pipe_.get(); }
    const PipelineHandler *pipe() const { return pipe_.get(); }

    std::list<Request *> queuedRequests_;
    ControlInfoMap controlInfo_;
    ControlList properties_;

    uint32_t requestSequence_;

    const CameraControlValidator *validator() const { return validator_.get(); }

private:
    enum State {
        CameraAvailable,
        CameraAcquired,
        CameraConfigured,
        CameraStopping,
        CameraRunning,
    };

    bool isAcquired() const;
    bool isRunning() const;
    int isAccessAllowed(State state, bool allowDisconnected = false,
                const char *from = __builtin_FUNCTION()) const;
    int isAccessAllowed(State low, State high,
                bool allowDisconnected = false,
                const char *from = __builtin_FUNCTION()) const;

    void disconnect();
    void setState(State state);

    std::shared_ptr<PipelineHandler> pipe_;
    std::string id_;
    std::set<Stream *> streams_;
    std::set<const Stream *> activeStreams_;

    bool disconnected_;
    std::atomic<State> state_;

    std::unique_ptr<CameraControlValidator> validator_;
};

} /* namespace libcamera */