Initial community commit

Src/replicant/nsid3v2/values.cpp

@@ -0,0 +1,49 @@
+#include "values.h"
+
+uint8_t ID3v2::Values::ValidHeaderMask(uint8_t version, uint8_t revision)
+{
+	switch(version)
+	{
+	case 2:
+		if (revision == 1)
+			return 0xE0;
+		else
+			return 0xC0;
+	case 4:
+		return 0xF0; /* 11110000 */
+	case 3:
+		return 0xE0; /* 11100000 */
+	default:
+		return 0;
+	}
+}
+
+bool ID3v2::Values::KnownVersion(uint8_t version, uint8_t revision)
+{
+	if (version > Values::MAX_VERSION)
+		return false;
+
+	if (version < Values::MIN_VERSION)
+		return false;
+
+	return true;
+}
+
+uint8_t ID3v2::Values::ExtendedHeaderFlag(uint8_t version, uint8_t revision)
+{
+	switch(version)
+	{
+	case 2:
+		if (revision == 1)
+			return (1 << 6);
+		else
+			return 0;
+
+	case 3:
+	case 4:
+		return (1 << 6);
+
+	default: 
+		return 0;
+	}
+}