libcamera: stream_option: use format name to set cam/qcam format

Replace hex input for pixel formats with their format names, for input in
cam and qcam.
Hence, remove the todo.

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/cam/stream_options.cpp

@@ -19,7 +19,7 @@ StreamKeyValueParser::StreamKeyValueParser()
 		  ArgumentRequired);
 	addOption("height", OptionInteger, "Height in pixels",
 		  ArgumentRequired);
-	addOption("pixelformat", OptionInteger, "Pixel format",
+	addOption("pixelformat", OptionString, "Pixel format name",
 		  ArgumentRequired);
 }
 
@@ -95,9 +95,8 @@ int StreamKeyValueParser::updateConfiguration(CameraConfiguration *config,
 			cfg.size.height = opts["height"];
 		}
 
-		/* \todo Translate 4CC string to pixelformat with modifier. */
 		if (opts.isSet("pixelformat"))
-			cfg.pixelFormat = PixelFormat(opts["pixelformat"]);
+			cfg.pixelFormat = PixelFormat::fromString(opts["pixelformat"].toString());
 	}
 
 	return 0;