cam: Add option to print the Request metadata

Add the "--metadata" option to the cam tool, which will be used to
print the metadata associated with a completed capture request.

Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

src/cam/main.cpp

@@ -197,6 +197,9 @@ int CamApp::parseOptions(int argc, char *argv[])
 	parser.addOption(OptStrictFormats, OptionNone,
 			 "Do not allow requested stream format(s) to be adjusted",
 			 "strict-formats");
+	parser.addOption(OptMetadata, OptionNone,
+			 "Print the metadata for completed requests",
+			 "metadata");
 
 	options_ = parser.parse(argc, argv);
 	if (!options_.valid())

src/cam/main.h

@@ -19,6 +19,7 @@ enum {
 	OptStream = 's',
 	OptListControls = 256,
 	OptStrictFormats = 257,
+	OptMetadata = 258,
 };
 
 #endif /* __CAM_MAIN_H__ */