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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* v4l2_subdevice.h - 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
{
public:
using Formats = std::map<unsigned int, std::vector<SizeRange>>;
enum Whence {
TryFormat = V4L2_SUBDEV_FORMAT_TRY,
ActiveFormat = V4L2_SUBDEV_FORMAT_ACTIVE,
};
struct Stream {
Stream()
: pad(0), stream(0)
{
}
Stream(unsigned int p, unsigned int s)
: pad(p), stream(s)
{
}
unsigned int pad;
unsigned int stream;
};
using Routing = std::vector<struct v4l2_subdev_route>;
explicit V4L2Subdevice(const MediaEntity *entity);
~V4L2Subdevice();
int open();
const MediaEntity *entity() const { return entity_; }
int getSelection(const Stream &stream, unsigned int target,
Rectangle *rect);
int getSelection(unsigned int pad, unsigned int target, Rectangle *rect)
{
return getSelection({ pad, 0 }, target, rect);
}
int setSelection(const Stream &stream, unsigned int target,
Rectangle *rect);
int setSelection(unsigned int pad, unsigned int target, Rectangle *rect)
{
return setSelection({ pad, 0 }, target, rect);
}
Formats formats(const Stream &stream);
Formats formats(unsigned int pad)
{
return formats({ pad, 0 });
}
int getFormat(const Stream &stream, V4L2SubdeviceFormat *format,
Whence whence = ActiveFormat);
int getFormat(unsigned int pad, V4L2SubdeviceFormat *format,
Whence whence = ActiveFormat)
{
return getFormat({ pad, 0 }, format, whence);
}
int setFormat(const Stream &stream, V4L2SubdeviceFormat *format,
Whence whence = ActiveFormat);
int setFormat(unsigned int pad, V4L2SubdeviceFormat *format,
Whence whence = ActiveFormat)
{
return setFormat({ pad, 0 }, format, whence);
}
int getRouting(Routing *routing, Whence whence = ActiveFormat);
int setRouting(Routing *routing, Whence whence = ActiveFormat);
const std::string &model();
const V4L2SubdeviceCapability &caps() const { return caps_; }
static std::unique_ptr<V4L2Subdevice>
fromEntityName(const MediaDevice *media, const std::string &entity);
protected:
std::string logPrefix() const override;
private:
LIBCAMERA_DISABLE_COPY(V4L2Subdevice)
std::optional<ColorSpace>
toColorSpace(const v4l2_mbus_framefmt &format) const;
std::vector<unsigned int> enumPadCodes(const Stream &stream);
std::vector<SizeRange> enumPadSizes(const Stream &stream,
unsigned int code);
const MediaEntity *entity_;
std::string model_;
struct V4L2SubdeviceCapability caps_;
};
bool operator==(const V4L2Subdevice::Stream &lhs, const V4L2Subdevice::Stream &rhs);
static inline bool operator!=(const V4L2Subdevice::Stream &lhs,
const V4L2Subdevice::Stream &rhs)
{
return !(lhs == rhs);
}
std::ostream &operator<<(std::ostream &out, const V4L2Subdevice::Stream &stream);
std::ostream &operator<<(std::ostream &out, const V4L2Subdevice::Routing &routing);
} /* namespace libcamera */
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