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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * V4L2 Subdevice
 */

#pragma once

#include <memory>
#include <optional>
#include <ostream>
#include <string>
#include <vector>

#include <linux/v4l2-subdev.h>

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

#include <libcamera/color_space.h>
#include <libcamera/geometry.h>

#include "libcamera/internal/formats.h"
#include "libcamera/internal/media_object.h"
#include "libcamera/internal/v4l2_device.h"

namespace libcamera {

class MediaDevice;

class MediaBusFormatInfo
{
public:
	enum class Type {
		Image,
		Metadata,
		EmbeddedData,
	};

	bool isValid() const { return code != 0; }

	static const MediaBusFormatInfo &info(uint32_t code);

	const char *name;
	uint32_t code;
	Type type;
	unsigned int bitsPerPixel;
	PixelFormatInfo::ColourEncoding colourEncoding;
};

struct V4L2SubdeviceCapability final : v4l2_subdev_capability {
	bool isReadOnly() const
	{
		return capabilities & V4L2_SUBDEV_CAP_RO_SUBDEV;
	}
	bool hasStreams() const
	{
		return capabilities & V4L2_SUBDEV_CAP_STREAMS;
	}
};

struct V4L2SubdeviceFormat {
	uint32_t code;
	Size size;
	std::optional<ColorSpace> colorSpace;

	const std::string toString() const;
};

std::ostream &operator<<(std::ostream &out, const V4L2SubdeviceFormat &f);

class V4L2Subdevice : public V4L2Device
{