diff options
Diffstat (limited to 'libs/ardour/midi_clock_slave.cc')
| -rw-r--r-- | libs/ardour/midi_clock_slave.cc | 48 |
1 files changed, 28 insertions, 20 deletions
diff --git a/libs/ardour/midi_clock_slave.cc b/libs/ardour/midi_clock_slave.cc index 7eaeeb9e07..762d94469c 100644 --- a/libs/ardour/midi_clock_slave.cc +++ b/libs/ardour/midi_clock_slave.cc @@ -45,7 +45,7 @@ using namespace PBD; MIDIClock_Slave::MIDIClock_Slave (Session& s, MidiPort& p, int ppqn) : ppqn (ppqn) - , bandwidth (10.0 / 60.0) // 1 BpM = 1 / 60 Hz + , bandwidth (2.0 / 60.0) // 1 BpM = 1 / 60 Hz { session = (ISlaveSessionProxy *) new SlaveSessionProxy(s); rebind (p); @@ -55,7 +55,7 @@ MIDIClock_Slave::MIDIClock_Slave (Session& s, MidiPort& p, int ppqn) MIDIClock_Slave::MIDIClock_Slave (ISlaveSessionProxy* session_proxy, int ppqn) : session(session_proxy) , ppqn (ppqn) - , bandwidth (10.0 / 60.0) // 1 BpM = 1 / 60 Hz + , bandwidth (2.0 / 60.0) // 1 BpM = 1 / 60 Hz { reset (); } @@ -123,6 +123,8 @@ MIDIClock_Slave::update_midi_clock (Parser& /*parser*/, framepos_t timestamp) return; } + pframes_t cycle_offset = timestamp - session->sample_time_at_cycle_start(); + calculate_one_ppqn_in_frames_at(should_be_position); framepos_t elapsed_since_start = timestamp - first_timestamp; @@ -134,6 +136,8 @@ MIDIClock_Slave::update_midi_clock (Parser& /*parser*/, framepos_t timestamp) first_timestamp = timestamp; elapsed_since_start = should_be_position; + DEBUG_TRACE (DEBUG::MidiClock, string_compose ("first clock message after start received @ %1\n", timestamp)); + // calculate filter coefficients calculate_filter_coefficients(); @@ -153,7 +157,7 @@ MIDIClock_Slave::update_midi_clock (Parser& /*parser*/, framepos_t timestamp) // we use session->transport_frame() instead of t1 here // because t1 is used to calculate the transport speed, // so the loop will compensate for accumulating rounding errors - error = (double(should_be_position) - double(session->transport_frame())); + error = (double(should_be_position) - (double(session->transport_frame()) + double(cycle_offset))); e = error / double(session->frame_rate()); current_delta = error; @@ -163,21 +167,23 @@ MIDIClock_Slave::update_midi_clock (Parser& /*parser*/, framepos_t timestamp) e2 += c * e; } - DEBUG_TRACE (DEBUG::MidiClock, string_compose ("clock #%1 @ %2 arrived %3 (theoretical) audible %4 transport %5 error %6 " - "read delta %7 should-be delta %8 t1-t0 %9 t0 %10 t1 %11 framerate %12 appspeed %13\n", - midi_clock_count, - elapsed_since_start, - should_be_position, - session->audible_frame(), - session->transport_frame(), - error, - timestamp - last_timestamp, - one_ppqn_in_frames, - (t1 -t0) * session->frame_rate(), - t0 * session->frame_rate(), - t1 * session->frame_rate(), - session->frame_rate(), - ((t1 - t0) * session->frame_rate()) / one_ppqn_in_frames)); + DEBUG_TRACE (DEBUG::MidiClock, string_compose ("clock #%1 @ %2 should-be %3 transport %4 error %5 appspeed %6 " + "read-delta %7 should-be delta %8 t1-t0 %9 t0 %10 t1 %11 framerate %12 engine %13\n", + midi_clock_count, // # + elapsed_since_start, // @ + should_be_position, // should-be + session->transport_frame(), // transport + error, // error + ((t1 - t0) * session->frame_rate()) / one_ppqn_in_frames, // appspeed + timestamp - last_timestamp, // read delta + one_ppqn_in_frames, // should-be delta + (t1 - t0) * session->frame_rate(), // t1-t0 + t0 * session->frame_rate(), // t0 + t1 * session->frame_rate(), // t1 + session->frame_rate(), // framerate + session->frame_time() + + )); last_timestamp = timestamp; } @@ -185,7 +191,7 @@ MIDIClock_Slave::update_midi_clock (Parser& /*parser*/, framepos_t timestamp) void MIDIClock_Slave::start (Parser& /*parser*/, framepos_t timestamp) { - DEBUG_TRACE (DEBUG::MidiClock, string_compose ("MIDIClock_Slave got start message at time %1 engine time %2\n", timestamp, session->frame_time())); + DEBUG_TRACE (DEBUG::MidiClock, string_compose ("MIDIClock_Slave got start message at time %1 engine time %2 transport_frame %3\n", timestamp, session->frame_time(), session->transport_frame())); if (!_started) { reset(); @@ -200,6 +206,8 @@ MIDIClock_Slave::start (Parser& /*parser*/, framepos_t timestamp) void MIDIClock_Slave::reset () { + DEBUG_TRACE (DEBUG::MidiClock, string_compose ("MidiClock_Slave reset(): calculated filter bandwidth is %1 for period size %2\n", bandwidth, session->frames_per_cycle())); + should_be_position = session->transport_frame(); last_timestamp = 0; @@ -345,7 +353,7 @@ MIDIClock_Slave::speed_and_position (double& speed, framepos_t& pos) pos = should_be_position; } - DEBUG_TRACE (DEBUG::MidiClock, string_compose ("speed_and_position: %1 & %2 <-> %3 (transport)\n", speed, pos, session->transport_frame())); + DEBUG_TRACE (DEBUG::MidiClock, string_compose ("speed_and_position: speed %1 should-be %2 transport %3 \n", speed, pos, session->transport_frame())); return true; } |