allanger/ardour
1
0
Fork 0
Code Issues Pull Requests 1 Actions Packages Projects Releases Activity

Add method to send a song position pointer message

Browse Source
This commit is contained in:
Michael Fisher
2013-07-28 17:18:30 -05:00
committed by Robin Gareus
parent 79d134ca78
commit 3538fa8442
2 changed files with 40 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
libs/ardour/ardour/session.h
View File

@@ -813,6 +813,7 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
void send_mmc_locate (framepos_t);
int send_full_time_code (framepos_t);
void send_song_position_pointer (framepos_t);
bool step_editing() const { return (_step_editors > 0); }

39
libs/ardour/session_midi.cc
View File

@@ -45,6 +45,7 @@
#include "ardour/midi_ui.h"
#include "ardour/session.h"
#include "ardour/slave.h"
#include "ardour/tempo.h"
#include "i18n.h"
@@ -581,6 +582,44 @@ Session::mmc_step_timeout ()
return true;
}
/***********************************************************************
OUTBOUND SYSTEM COMMON STUFF
**********************************************************************/
void
Session::send_song_position_pointer (framepos_t t)
{
/* This doesn't account for the Meter's note divisor */
if (!_engine.freewheeling()) {
Timecode::BBT_Time time;
bbt_time (t, time);
const double beats_per_bar = tempo_map().meter_at(t).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] = {
0xf2, /* MIDI System Common - Song Position Pointer status */
midi_beats & 0x7f,
midi_beats & 0x3f80
};
if (MIDI::Port* port = MIDI::Manager::instance()->midi_clock_output_port()) {
port->midimsg (msg, sizeof (msg), 0);
}
}
}
int
Session::start_midi_thread ()
{