fix bug in MidiClock that sent MIDI Clock messages with negative offsets after a loop point
git-svn-id: svn://localhost/ardour2/branches/3.0@11456 d708f5d6-7413-0410-9779-e7cbd77b26cf
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@ -24,6 +24,7 @@
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#include "evoral/midi_events.h"
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#include "ardour/audioengine.h"
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#include "ardour/ticker.h"
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#include "ardour/session.h"
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#include "ardour/tempo.h"
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@ -69,6 +70,11 @@ void MidiClockTicker::transport_state_changed()
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return;
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}
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if (!_session->engine().running()) {
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/* Engine stopped, we can't do anything */
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return;
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}
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float speed = _session->transport_speed();
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framepos_t position = _session->transport_frame();
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@ -126,22 +132,29 @@ void MidiClockTicker::transport_looped()
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// adjust _last_tick, so that the next MIDI clock message is sent
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// in due time (and the tick interval is still constant)
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framecnt_t elapsed_since_last_tick = loop_location->end() - _last_tick;
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_last_tick = loop_location->start() - elapsed_since_last_tick;
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if (loop_location->start() > elapsed_since_last_tick) {
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_last_tick = loop_location->start() - elapsed_since_last_tick;
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} else {
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_last_tick = 0;
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}
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}
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void MidiClockTicker::tick (const framepos_t& transport_frames)
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void MidiClockTicker::tick (const framepos_t& transport_frame)
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{
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if (!Config->get_send_midi_clock() || _session == 0 || _session->transport_speed() != 1.0f || _midi_port == 0)
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if (!Config->get_send_midi_clock() || _session == 0 || _session->transport_speed() != 1.0f || _midi_port == 0) {
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return;
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}
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while (true) {
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double next_tick = _last_tick + one_ppqn_in_frames(transport_frames);
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frameoffset_t next_tick_offset = llrint (next_tick) - transport_frames;
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double next_tick = _last_tick + one_ppqn_in_frames (transport_frame);
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frameoffset_t next_tick_offset = llrint (next_tick) - transport_frame;
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DEBUG_TRACE (PBD::DEBUG::MidiClock,
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string_compose ("Transport: %1, last tick time: %2, next tick time: %3, offset: %4, cycle length: %5\n",
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transport_frames, _last_tick, next_tick, next_tick_offset, _midi_port->nframes_this_cycle()
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transport_frame, _last_tick, next_tick, next_tick_offset, _midi_port->nframes_this_cycle()
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)
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);
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@ -149,15 +162,18 @@ void MidiClockTicker::tick (const framepos_t& transport_frames)
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break;
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}
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send_midi_clock_event (next_tick_offset);
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if (next_tick_offset >= 0) {
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send_midi_clock_event (next_tick_offset);
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}
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_last_tick = next_tick;
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}
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}
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double MidiClockTicker::one_ppqn_in_frames (framepos_t transport_position)
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{
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const Tempo& current_tempo = _session->tempo_map().tempo_at(transport_position);
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double frames_per_beat = current_tempo.frames_per_beat(_session->nominal_frame_rate());
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const Tempo& current_tempo = _session->tempo_map().tempo_at (transport_position);
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double frames_per_beat = current_tempo.frames_per_beat (_session->nominal_frame_rate());
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double quarter_notes_per_beat = 4.0 / current_tempo.note_type();
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double frames_per_quarter_note = frames_per_beat / quarter_notes_per_beat;
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@ -30,6 +30,7 @@
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#include "pbd/failed_constructor.h"
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#include "pbd/convert.h"
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#include "pbd/strsplit.h"
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#include "pbd/stacktrace.h"
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#include "midi++/types.h"
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#include "midi++/port.h"
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@ -306,7 +307,10 @@ Port::write(byte * msg, size_t msglen, timestamp_t timestamp)
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// XXX This had to be temporarily commented out to make export work again
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if (!(timestamp < _nframes_this_cycle)) {
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std::cerr << "assertion timestamp < _nframes_this_cycle failed!" << std::endl;
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std::cerr << "attempting to write MIDI event of " << msglen << " bytes at time "
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<< timestamp << " of " << _nframes_this_cycle
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<< " (this will not work - needs a code fix)"
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<< std::endl;
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}
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if (_currently_in_cycle) {
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@ -327,6 +331,7 @@ Port::write(byte * msg, size_t msglen, timestamp_t timestamp)
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}
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} else {
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cerr << "write to JACK midi port failed: not currently in a process cycle." << endl;
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PBD::stacktrace (cerr, 20);
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}
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}
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