move TimecodeFormat to libtimecode

provide a way to convert any TimecodeFormat to float frame-rate,
not only the currently active timecode_foramt.

git-svn-id: svn://localhost/ardour2/branches/3.0@13249 d708f5d6-7413-0410-9779-e7cbd77b26cf

2 files changed, 118 insertions, 0 deletions

diff --git a/libs/timecode/src/time.cc b/libs/timecode/src/time.cc
index 92cede1d9d..6dc123624b 100644
--- a/libs/timecode/src/time.cc
+++ b/libs/timecode/src/time.cc
@@ -423,6 +423,108 @@ hours_floor(Time& timecode)
 	}
 }
 
+float
+timecode_to_frames_per_second(TimecodeFormat t)
+{
+	switch (t) {
+		case timecode_23976:
+			return (24000.0/1001.0); //23.976;
+
+			break;
+		case timecode_24:
+			return 24;
+
+			break;
+		case timecode_24976:
+			return (25000.0/1001.0); //24.976;
+
+			break;
+		case timecode_25:
+			return 25;
+
+			break;
+		case timecode_2997:
+			return 29.97;
+
+			break;
+		case timecode_2997drop:
+			return (30000.0/1001.0); //29.97;
+
+			break;
+		case timecode_30:
+			return 30;
+
+			break;
+		case timecode_30drop:
+			return 30;
+
+			break;
+		case timecode_5994:
+			return (60000.0/1001.0); //59.94;
+
+			break;
+		case timecode_60:
+			return 60;
+
+			break;
+	        default:
+			//std::cerr << "Editor received unexpected timecode type" << std::endl;
+			break;
+	}
+	return 30.0;
+}
+
+bool
+timecode_has_drop_frames(TimecodeFormat t)
+{
+	switch (t) {
+		case timecode_23976:
+			return false;
+
+			break;
+		case timecode_24:
+			return false;
+
+			break;
+		case timecode_24976:
+			return false;
+
+			break;
+		case timecode_25:
+			return false;
+
+			break;
+		case timecode_2997:
+			return false;
+
+			break;
+		case timecode_2997drop:
+			return true;
+
+			break;
+		case timecode_30:
+			return false;
+
+			break;
+		case timecode_30drop:
+			return true;
+
+			break;
+		case timecode_5994:
+			return false;
+
+			break;
+		case timecode_60:
+			return false;
+
+			break;
+	        default:
+			//error << "Editor received unexpected timecode type" << endmsg;
+			break;
+	}
+
+	return false;
+}
 
 } // namespace Timecode
 
diff --git a/libs/timecode/timecode/time.h b/libs/timecode/timecode/time.h
index bcb078f3f1..090d3851fb 100644
--- a/libs/timecode/timecode/time.h
+++ b/libs/timecode/timecode/time.h
@@ -32,6 +32,19 @@ enum Wrap {
 	HOURS
 };
 
+enum TimecodeFormat {
+	timecode_23976,
+	timecode_24,
+	timecode_24976,
+	timecode_25,
+	timecode_2997,
+	timecode_2997drop,
+	timecode_30,
+	timecode_30drop,
+	timecode_5994,
+	timecode_60
+};
+
 struct Time {
 	bool         negative;
 	uint32_t     hours;
@@ -84,6 +97,9 @@ void seconds_floor (Time& timecode);
 void minutes_floor (Time& timecode);
 void hours_floor (Time& timecode);
 
+float timecode_to_frames_per_second(TimecodeFormat const t);
+bool timecode_has_drop_frames(TimecodeFormat const t);
+
 } // namespace Timecode
 
 std::ostream& operator<< (std::ostream& ostr, const Timecode::Time& t);