diff options
Diffstat (limited to 'libs/ardour/ticker.cc')
| -rw-r--r-- | libs/ardour/ticker.cc | 86 |
1 files changed, 71 insertions, 15 deletions
diff --git a/libs/ardour/ticker.cc b/libs/ardour/ticker.cc index 5d078952a1..4f66128943 100644 --- a/libs/ardour/ticker.cc +++ b/libs/ardour/ticker.cc @@ -40,7 +40,8 @@ MidiClockTicker::MidiClockTicker () { } -void MidiClockTicker::set_session (Session* s) +void +MidiClockTicker::set_session (Session* s) { SessionHandlePtr::set_session (s); @@ -59,12 +60,14 @@ MidiClockTicker::session_going_away () _midi_port = 0; } -void MidiClockTicker::update_midi_clock_port() +void +MidiClockTicker::update_midi_clock_port() { _midi_port = MIDI::Manager::instance()->midi_clock_output_port(); } -void MidiClockTicker::transport_state_changed() +void +MidiClockTicker::transport_state_changed() { if (_session->exporting()) { /* no midi clock during export, for now */ @@ -80,8 +83,8 @@ void MidiClockTicker::transport_state_changed() framepos_t position = _session->transport_frame(); DEBUG_TRACE (PBD::DEBUG::MidiClock, - string_compose ("Transport state change @ %4, speed: %1 position: %2 play loop: %3\n", speed, position, _session->get_play_loop(), position) - ); + string_compose ("Transport state change @ %4, speed: %1 position: %2 play loop: %3\n", speed, position, _session->get_play_loop(), position) + ); if (speed == 1.0f) { _last_tick = position; @@ -109,19 +112,27 @@ void MidiClockTicker::transport_state_changed() return; send_stop_event(0); + send_position_event (position, 0); } tick (position); } -void MidiClockTicker::position_changed (framepos_t position) +void +MidiClockTicker::position_changed (framepos_t position) { - DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Position change: %1\n", position)); + const double speed = _session->transport_speed(); + DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Transport Position Change: %1, speed: %2\n", position, speed)); + + if (speed == 0.0f && Config->get_send_midi_clock()) { + send_position_event (position, 0); + } _last_tick = position; } -void MidiClockTicker::transport_looped() +void +MidiClockTicker::transport_looped() { Location* loop_location = _session->locations()->auto_loop_location(); assert(loop_location); @@ -143,7 +154,8 @@ void MidiClockTicker::transport_looped() } } -void MidiClockTicker::tick (const framepos_t& transport_frame) +void +MidiClockTicker::tick (const framepos_t& transport_frame) { if (!Config->get_send_midi_clock() || _session == 0 || _session->transport_speed() != 1.0f || _midi_port == 0) { return; @@ -155,9 +167,11 @@ void MidiClockTicker::tick (const framepos_t& transport_frame) MIDI::JackMIDIPort* mp = dynamic_cast<MIDI::JackMIDIPort*> (_midi_port); + /* DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Transport: %1, last tick time: %2, next tick time: %3, offset: %4, cycle length: %5\n", transport_frame, _last_tick, next_tick, next_tick_offset, mp ? mp->nframes_this_cycle() : 0)); + */ if (!mp || (next_tick_offset >= mp->nframes_this_cycle())) { break; @@ -171,7 +185,8 @@ void MidiClockTicker::tick (const framepos_t& transport_frame) } } -double MidiClockTicker::one_ppqn_in_frames (framepos_t transport_position) +double +MidiClockTicker::one_ppqn_in_frames (framepos_t transport_position) { const Tempo& current_tempo = _session->tempo_map().tempo_at (transport_position); double frames_per_beat = current_tempo.frames_per_beat (_session->nominal_frame_rate()); @@ -182,47 +197,88 @@ double MidiClockTicker::one_ppqn_in_frames (framepos_t transport_position) return frames_per_quarter_note / double (_ppqn); } -void MidiClockTicker::send_midi_clock_event (pframes_t offset) +void +MidiClockTicker::send_midi_clock_event (pframes_t offset) { if (!_midi_port) { return; } - DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Tick with offset %1\n", offset)); + // DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Tick with offset %1\n", offset)); static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_CLOCK }; _midi_port->write (_midi_clock_tick, 1, offset); } -void MidiClockTicker::send_start_event (pframes_t offset) +void +MidiClockTicker::send_start_event (pframes_t offset) { if (!_midi_port) { return; } + DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Start %1\n", _last_tick)); + static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_START }; _midi_port->write (_midi_clock_tick, 1, offset); } -void MidiClockTicker::send_continue_event (pframes_t offset) +void +MidiClockTicker::send_continue_event (pframes_t offset) { if (!_midi_port) { return; } + DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Continue %1\n", _last_tick)); + static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_CONTINUE }; _midi_port->write (_midi_clock_tick, 1, offset); } -void MidiClockTicker::send_stop_event (pframes_t offset) +void +MidiClockTicker::send_stop_event (pframes_t offset) { if (!_midi_port) { return; } + DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Stop %1\n", _last_tick)); + static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_STOP }; _midi_port->write (_midi_clock_tick, 1, offset); } +void +MidiClockTicker::send_position_event (framepos_t transport_position, pframes_t offset) +{ + if (_midi_port == 0 || _session == 0 || _session->engine().freewheeling()) { + return; + } + + const TempoMap& tempo = _session->tempo_map(); + Timecode::BBT_Time time; + _session->bbt_time (transport_position, time); + const double beats_per_bar = tempo.meter_at(transport_position).divisions_per_bar(); + /* Midi Beats in terms of Song Position Pointer is equivalent to total + sixteenth notes at 'time' */ + const uint32_t midi_beats = 4 * (((time.bars - 1) * beats_per_bar) + time.beats - 1); + + /* can only use 14bits worth */ + if (midi_beats > 0x3fff) { + return; + } + + /* split midi beats into a 14bit value */ + MIDI::byte msg[3] = { + MIDI_CMD_COMMON_SONG_POS, + midi_beats & 0x007f, + midi_beats & 0x3f80 + }; + + DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Song Position: %1\n", midi_beats)); + + _midi_port->midimsg (msg, sizeof (msg), offset); +} |