skeleton framework for LTC-slave

git-svn-id: svn://localhost/ardour2/branches/3.0@13256 d708f5d6-7413-0410-9779-e7cbd77b26cf

3 files changed, 47 insertions, 1 deletions

diff --git a/libs/ardour/ardour/audioengine.h b/libs/ardour/ardour/audioengine.h
index 1c0d0f1a55..4e55ea2140 100644
--- a/libs/ardour/ardour/audioengine.h
+++ b/libs/ardour/ardour/audioengine.h
@@ -260,6 +260,10 @@ _	   the regular process() call to session->process() is not made.
 
 	int create_process_thread (boost::function<void()>, pthread_t*, size_t stacksize);
 
+#ifdef HAVE_LTC
+	Port *ltc_input_port() const { return _ltc_input; }
+#endif
+
 private:
 	static AudioEngine*       _instance;
 
@@ -289,6 +293,10 @@ private:
         Glib::Threads::Thread*     m_meter_thread;
 	ProcessThread*            _main_thread;
 
+#ifdef HAVE_LTC
+	Port*                     _ltc_input;
+#endif
+
 	SerializedRCUManager<Ports> ports;
 
 	boost::shared_ptr<Port> register_port (DataType type, const std::string& portname, bool input);
diff --git a/libs/ardour/ardour/slave.h b/libs/ardour/ardour/slave.h
index a8bf28b8ce..b64ba3f42e 100644
--- a/libs/ardour/ardour/slave.h
+++ b/libs/ardour/ardour/slave.h
@@ -32,6 +32,10 @@
 #include "midi++/parser.h"
 #include "midi++/types.h"
 
+#ifdef HAVE_LTC
+#include <ltc.h>
+#endif
+
 namespace MIDI {
 	class Port;
 }
@@ -293,6 +297,39 @@ class MTC_Slave : public Slave {
 	void init_engine_dll (framepos_t, framepos_t);
 };
 
+#ifdef HAVE_LTC
+class LTC_Slave : public Slave {
+  public:
+	LTC_Slave (Session&);
+	~LTC_Slave ();
+
+	bool speed_and_position (double&, framepos_t&);
+
+	bool locked() const;
+	bool ok() const;
+
+	framecnt_t resolution () const;
+	bool requires_seekahead () const { return true; }
+	framecnt_t seekahead_distance() const;
+	bool give_slave_full_control_over_transport_speed() const;
+
+  private:
+  int parse_ltc(const jack_nframes_t nframes, const jack_default_audio_sample_t * const in, const framecnt_t posinfo);
+	void process_ltc();
+
+	Session&    session;
+	bool        did_reset_tc_format;
+	Timecode::TimecodeFormat saved_tc_format;
+
+  LTCDecoder *decoder;
+	framecnt_t  current_frames_per_ltc_frame;
+	framecnt_t  monotonic_fcnt;
+
+	framepos_t  ltc_transport_pos;
+	double      ltc_speed;
+};
+#endif
+
 class MIDIClock_Slave : public Slave {
   public:
 	MIDIClock_Slave (Session&, MIDI::Port&, int ppqn = 24);
diff --git a/libs/ardour/ardour/types.h b/libs/ardour/ardour/types.h
index b84eb8e7f6..5bd03d2788 100644
--- a/libs/ardour/ardour/types.h
+++ b/libs/ardour/ardour/types.h
@@ -462,7 +462,8 @@ namespace ARDOUR {
 	enum SyncSource {
 		JACK,
 		MTC,
-		MIDIClock
+		MIDIClock,
+		LTC
 	};
 
 	enum ShuttleBehaviour {