1 files changed, 118 insertions, 12 deletions

diff --git a/include/libcamera/internal/v4l2_subdevice.h b/include/libcamera/internal/v4l2_subdevice.h
index 6fda52ad..01ed4c2f 100644
--- a/include/libcamera/internal/v4l2_subdevice.h
+++ b/include/libcamera/internal/v4l2_subdevice.h
@@ -13,6 +13,8 @@
 #include <string>
 #include <vector>
 
+#include <linux/v4l2-subdev.h>
+
 #include <libcamera/base/class.h>
 #include <libcamera/base/log.h>
 
@@ -27,13 +29,43 @@ 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 mbus_code;
+	uint32_t code;
 	Size size;
 	std::optional<ColorSpace> colorSpace;
 
 	const std::string toString() const;
-	uint8_t bitsPerPixel() const;
 };
 
 std::ostream &operator<<(std::ostream &out, const V4L2SubdeviceFormat &f);
@@ -44,10 +76,43 @@ public:
 	using Formats = std::map<unsigned int, std::vector<SizeRange>>;
 
 	enum Whence {
-		ActiveFormat,
-		TryFormat,
+		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;
 	};
 
+	struct Route {
+		Route()
+			: flags(0)
+		{
+		}
+
+		Route(const Stream &snk, const Stream &src, uint32_t f)
+			: sink(snk), source(src), flags(f)
+		{
+		}
+
+		Stream sink;
+		Stream source;
+		uint32_t flags;
+	};
+
+	using Routing = std::vector<Route>;
+
 	explicit V4L2Subdevice(const MediaEntity *entity);
 	~V4L2Subdevice();
 
@@ -55,19 +120,45 @@ public:
 
 	const MediaEntity *entity() const { return entity_; }
 
-	int getSelection(unsigned int pad, unsigned int target,
+	int getSelection(const Stream &stream, unsigned int target,
 			 Rectangle *rect);
-	int setSelection(unsigned int pad, unsigned int target,
+	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);
-
-	Formats formats(unsigned int pad);
-
+	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);
+		      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);
@@ -78,13 +169,28 @@ protected:
 private:
 	LIBCAMERA_DISABLE_COPY(V4L2Subdevice)
 
-	std::vector<unsigned int> enumPadCodes(unsigned int pad);
-	std::vector<SizeRange> enumPadSizes(unsigned int pad,
+	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::Route &route);
+std::ostream &operator<<(std::ostream &out, const V4L2Subdevice::Routing &routing);
+
 } /* namespace libcamera */