libcamera: bayer_format: Overload ==/!= operators for BayerFormats

Enable to test two Bayer formats for equality by checking if the order
of the color channels, the bit depth of the pattern, and the packing
scheme match. Additionally, add the reverse operation (!=), which negates
the equality test result.

Signed-off-by: Sebastian Fricke <sebastian.fricke@posteo.net>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

include/libcamera/internal/bayer_format.h

@@ -57,6 +57,12 @@ public:
 	Packing packing;
 };
 
+bool operator==(const BayerFormat &lhs, const BayerFormat &rhs);
+static inline bool operator!=(const BayerFormat &lhs, const BayerFormat &rhs)
+{
+	return !(lhs == rhs);
+}
+
 } /* namespace libcamera */
 
 #endif /* __LIBCAMERA_INTERNAL_BAYER_FORMAT_H__ */

src/libcamera/bayer_format.cpp

@@ -215,6 +215,23 @@ std::string BayerFormat::toString() const
 	return result;
 }
 
+/**
+ * \brief Compare two BayerFormats for equality
+ * \return True if order, bitDepth and packing are equal, or false otherwise
+ */
+bool operator==(const BayerFormat &lhs, const BayerFormat &rhs)
+{
+	return lhs.order == rhs.order && lhs.bitDepth == rhs.bitDepth &&
+	       lhs.packing == rhs.packing;
+}
+
+/**
+ * \fn bool operator!=(const BayerFormat &lhs, const BayerFormat &rhs)
+ * \brief Compare two BayerFormats for inequality
+ * \return True if either order, bitdepth or packing are not equal, or false
+ * otherwise
+ */
+
 /**
  * \brief Convert a BayerFormat into the corresponding V4L2PixelFormat
  * \return The V4L2PixelFormat corresponding to this BayerFormat