libcamera: pixel_format: Add a function to return format based on string

Add a function which retrieves pixel format corresponding to its name
from PixelFormatInfo.

Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/pixel_format.cpp

@@ -130,4 +130,15 @@ std::string PixelFormat::toString() const
 	return info.name;
 }
 
+/**
+ * \brief Create a PixelFormat from a string
+ * \return Pixel format
+ * \return The PixelFormat represented by the \a name if known, or an
+ * invalid pixel format otherwise.
+ */
+PixelFormat PixelFormat::fromString(const std::string &name)
+{
+	return PixelFormatInfo::info(name).format;
+}
+
 } /* namespace libcamera */