Housekeeping, code style

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

diff --git a/libs/ardour/ticker.cc b/libs/ardour/ticker.cc
index 734b4013563627e952bb5f7ffd5e2318a656f1aa..4f6612894395fd1bb16b981d159edfc6462202fd 100644 (file)
--- a/libs/ardour/ticker.cc
+++ b/libs/ardour/ticker.cc
@@ -20,6 +20,7 @@
 #include "pbd/stacktrace.h"
 
 #include "midi++/port.h"
+#include "midi++/jack_midi_port.h"
 #include "midi++/manager.h"
 
 #include "evoral/midi_events.h"
@@ -39,7 +40,8 @@ MidiClockTicker::MidiClockTicker ()
 {
 }
 
-void MidiClockTicker::set_session (Session* s)
+void
+MidiClockTicker::set_session (Session* s)
 {
        SessionHandlePtr::set_session (s);
        
@@ -58,12 +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 */
@@ -79,8 +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;
@@ -108,19 +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);
@@ -142,7 +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;
@@ -152,13 +165,15 @@ void MidiClockTicker::tick (const framepos_t& transport_frame)
                double next_tick = _last_tick + one_ppqn_in_frames (transport_frame);
                frameoffset_t next_tick_offset = llrint (next_tick) - 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, _midi_port->nframes_this_cycle()
-                                    )
-                       );
+                                            transport_frame, _last_tick, next_tick, next_tick_offset, mp ? mp->nframes_this_cycle() : 0));
+               */
 
-               if (next_tick_offset >= _midi_port->nframes_this_cycle()) {
+               if (!mp || (next_tick_offset >= mp->nframes_this_cycle())) {
                        break;
                }
 
@@ -170,7 +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());
@@ -181,47 +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);
+}