From 4678bf06d71c8a18c489912dabf8aca312ab8b6b Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Tue, 31 Jul 2012 00:32:58 +0100
Subject: Barely-functional dcpdiff.

---
 src/dcp.cc       | 27 +++++++++++++++++++++++++++
 src/dcp.h        |  2 ++
 src/types.h      |  4 ++++
 tools/dcpdiff.cc | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 4 files changed, 88 insertions(+), 2 deletions(-)

diff --git a/src/dcp.cc b/src/dcp.cc
index 8f7a73bc..dc895e11 100644
--- a/src/dcp.cc
+++ b/src/dcp.cc
@@ -304,3 +304,30 @@ DCP::DCP (string directory)
 	}
 }
 
+list<string>
+DCP::equals (DCP const & other, EqualityType type) const
+{
+	list<string> notes;
+	
+	switch (type) {
+	case LIBDCP_METADATA:
+		if (_name != other._name) {
+			notes.push_back ("names differ");
+		}
+		if (_content_kind != other._content_kind) {
+			notes.push_back ("content kinds differ");
+		}
+		if (_fps != other._fps) {
+			notes.push_back ("frames per second differ");
+		}
+		if (_length != other._length) {
+			notes.push_back ("lengths differ");
+		}
+		if (_assets.size() != other._assets.size()) {
+			notes.push_back ("asset counts differ");
+		}
+		break;
+	}
+
+	return notes;
+}
diff --git a/src/dcp.h b/src/dcp.h
index 900a5665..6ab57bcb 100644
--- a/src/dcp.h
+++ b/src/dcp.h
@@ -106,6 +106,8 @@ public:
 		return _length;
 	}
 
+	std::list<std::string> equals (DCP const & other, EqualityType type) const;
+
 	/** Emitted with a parameter between 0 and 1 to indicate progress
 	 *  for long jobs.
 	 */
diff --git a/src/types.h b/src/types.h
index b8f7805a..5cd76ff4 100644
--- a/src/types.h
+++ b/src/types.h
@@ -62,6 +62,10 @@ public:
 	int denominator;
 };
 
+enum EqualityType {
+	LIBDCP_METADATA
+};
+
 }
 
 #endif
diff --git a/tools/dcpdiff.cc b/tools/dcpdiff.cc
index b503ee1a..840a1b3e 100644
--- a/tools/dcpdiff.cc
+++ b/tools/dcpdiff.cc
@@ -1,10 +1,63 @@
+#include <getopt.h>
 #include "dcp.h"
 
+using namespace std;
 using namespace libdcp;
 
+static void
+help (string n)
+{
+	cerr << "Syntax: " << n << " [OPTION] <DCP> <DCP>\n"
+	     << "  -v, --version      show DVD-o-matic version\n"
+	     << "  -h, --help         show this help\n"
+	     << "\n"
+	     << "The <DCP>s are the DCP directories to compare.\n";
+}
+
 int
 main (int argc, char* argv[])
 {
-	DCP dcp ("/home/carl/src/dvdomatic-test/reference/dolby_aurora.vob/dolby_aurora.vob");
-	return 0;
+	int option_index = 0;
+	while (1) {
+		static struct option long_options[] = {
+			{ "version", no_argument, 0, 'v'},
+			{ "help", no_argument, 0, 'h'},
+			{ 0, 0, 0, 0 }
+		};
+
+		int c = getopt_long (argc, argv, "vh", long_options, &option_index);
+
+		if (c == -1) {
+			break;
+		}
+
+		switch (c) {
+		case 'v':
+			cout << "dcpdiff version " << LIBDCP_VERSION << "\n";
+			exit (EXIT_SUCCESS);
+		case 'h':
+			help (argv[0]);
+			exit (EXIT_SUCCESS);
+		}
+	}
+
+	if (argc <= optind || argc > (optind + 2)) {
+		help (argv[0]);
+		exit (EXIT_FAILURE);
+	}
+
+	DCP a (argv[optind]);
+	DCP b (argv[optind + 1]);
+
+	list<string> notes = a.equals (b, LIBDCP_METADATA);
+	if (notes.empty ()) {
+		cout << "DCPs identical by LIBDCP_METADATA\n";
+		exit (EXIT_SUCCESS);
+	}
+
+	for (list<string>::iterator i = notes.begin(); i != notes.end(); ++i) {
+		cout << "  " << *i << "\n";
+	}
+
+	exit (EXIT_FAILURE);
 }
-- 
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