request.h

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * request.h - Capture request handling
 */

#pragma once

#include <map>
#include <memory>
#include <ostream>
#include <stdint.h>
#include <string>
#include <unordered_set>

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

#include <libcamera/controls.h>
#include <libcamera/fence.h>

namespace libcamera {

class Camera;
class CameraControlValidator;
class FrameBuffer;
class Stream;

class Request : public Extensible
{
    LIBCAMERA_DECLARE_PRIVATE()

public:
    enum Status {
        RequestPending,
        RequestComplete,
        RequestCancelled,
    };

    enum ReuseFlag {
        Default = 0,
        ReuseBuffers = (1 << 0),
    };

    using BufferMap = std::map<const Stream *, FrameBuffer *>;

    Request(Camera *camera, uint64_t cookie = 0);
    ~Request();

    void reuse(ReuseFlag flags = Default);

    ControlList &controls() { return *controls_; }
    ControlList &metadata() { return *metadata_; }
    const BufferMap &buffers() const { return bufferMap_; }
    int addBuffer(const Stream *stream, FrameBuffer *buffer,
              std::unique_ptr<Fence> fence = nullptr);
    FrameBuffer *findBuffer(const Stream *stream) const;

    uint32_t sequence() const;
    uint64_t cookie() const { return cookie_; }
    Status status() const { return status_; }

    bool hasPendingBuffers() const;

    std::string toString() const;

private:
    LIBCAMERA_DISABLE_COPY(Request)

    ControlList *controls_;
    ControlList *metadata_;
    BufferMap bufferMap_;

    const uint64_t cookie_;
    Status status_;
};

std::ostream &operator<<(std::ostream &out, const Request &r);

} /* namespace libcamera */