MTC-slave: print error if framerate mismatch

[ardour.git] / libs / ardour / mtc_slave.cc

diff --git a/libs/ardour/mtc_slave.cc b/libs/ardour/mtc_slave.cc
index f5b70317ddc72a69a8c7bc16e107ed6f3f6aa1fb..e46e9eb9553087743cc77007977e5e71a117cc09 100644 (file)
--- a/libs/ardour/mtc_slave.cc
+++ b/libs/ardour/mtc_slave.cc
@@ -61,6 +61,10 @@ MTC_Slave::MTC_Slave (Session& s, MIDI::Port& p)
 
        last_mtc_fps_byte = session.get_mtc_timecode_bits ();
 
+       mtc_timecode = timecode_60; // track changes of MTC timecode
+       a3e_timecode = timecode_60; // track canges of Ardour's timecode
+       printed_timecode_warning = false;
+
        reset (true);
        rebind (p);
 }
@@ -332,11 +336,29 @@ MTC_Slave::update_mtc_time (const byte *msg, bool was_full, framepos_t now)
        }
 
        if (reset_tc) {
-               if (!did_reset_tc_format) {
-                       saved_tc_format = session.config.get_timecode_format();
-                       did_reset_tc_format = true;
+               TimecodeFormat cur_timecode = session.config.get_timecode_format();
+               if (0 /* TODO preferences  */) {
+                       /* enforce time-code */
+                       if (!did_reset_tc_format) {
+                               saved_tc_format = cur_timecode;
+                               did_reset_tc_format = true;
+                       }
+                       if (cur_timecode != tc_format) {
+                               warning << _("Session and MTC framerate mismatch.") << endmsg;
+                       }
+                       session.config.set_timecode_format (tc_format);
+               } else {
+                       /* only warn about TC mismatch */
+                       if (mtc_timecode != tc_format) printed_timecode_warning = false;
+                       if (a3e_timecode != cur_timecode) printed_timecode_warning = false;
+
+                       if (cur_timecode != tc_format && ! printed_timecode_warning) {
+                               warning << _("Session and MTC framerate mismatch.") << endmsg;
+                               printed_timecode_warning = true;
+                       }
                }
-               session.config.set_timecode_format (tc_format);
+               mtc_timecode = tc_format;
+               a3e_timecode = cur_timecode;
        }
 
        DEBUG_TRACE (DEBUG::MTC, string_compose ("MTC at %1 TC %2 = mtc_frame %3 (from full message ? %4)\n",