diff options
Diffstat (limited to 'libs/ardour')
| -rw-r--r-- | libs/ardour/ardour/slave.h | 8 | ||||
| -rw-r--r-- | libs/ardour/mtc_slave.cc | 11 |
2 files changed, 19 insertions, 0 deletions
diff --git a/libs/ardour/ardour/slave.h b/libs/ardour/ardour/slave.h index 8f4ac1384b..85730e78b6 100644 --- a/libs/ardour/ardour/slave.h +++ b/libs/ardour/ardour/slave.h @@ -171,6 +171,12 @@ class Slave { * @return - whether ARDOUR should use the slave speed without any adjustments */ virtual bool give_slave_full_control_over_transport_speed() const { return false; } + + /** + * @return - current time-delta between engine and sync-source + */ + virtual std::string approximate_current_delta() const { return ""; } + }; /// We need this wrapper for testability, it's just too hard to mock up a session class @@ -255,6 +261,7 @@ class MTC_Slave : public TimecodeSlave { bool requires_seekahead () const { return true; } framecnt_t seekahead_distance() const; bool give_slave_full_control_over_transport_speed() const; + std::string approximate_current_delta() const; Timecode::TimecodeFormat apparent_timecode_format() const; std::string approximate_current_position() const; @@ -289,6 +296,7 @@ class MTC_Slave : public TimecodeSlave { Timecode::TimecodeFormat a3e_timecode; Timecode::Time timecode; bool printed_timecode_warning; + frameoffset_t current_delta; /* DLL - chase MTC */ double t0; ///< time at the beginning of the MTC quater frame diff --git a/libs/ardour/mtc_slave.cc b/libs/ardour/mtc_slave.cc index 4696f1e936..5eee8381bb 100644 --- a/libs/ardour/mtc_slave.cc +++ b/libs/ardour/mtc_slave.cc @@ -183,6 +183,7 @@ MTC_Slave::reset (bool with_position) window_begin = 0; window_end = 0; transport_direction = 1; + current_delta = 0; } void @@ -629,6 +630,8 @@ MTC_Slave::speed_and_position (double& speed, framepos_t& pos) DEBUG_TRACE (DEBUG::MTC, string_compose ("MTCsync spd: %1 pos: %2 | last-pos: %3 elapsed: %4 delta: %5\n", speed, pos, last.position, elapsed, pos - sess_pos)); + current_delta = (pos - sess_pos); + return true; } @@ -652,3 +655,11 @@ MTC_Slave::approximate_current_position() const Timecode::timecode_to_frames_per_second(mtc_timecode), Timecode::timecode_has_drop_frames(mtc_timecode)); } + +std::string +MTC_Slave::approximate_current_delta() const +{ + char delta[24]; + snprintf(delta, sizeof(delta), "%+" PRIi64, current_delta); // XXX TODO unit, refine + return std::string(delta); +} |