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Revamp clock processing so it uses an internal frame reference.

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MidiClockTicker::Position managed by boost::scoped_ptr
This commit is contained in:
Michael Fisher 2013-08-01 13:47:22 -05:00 committed by Paul Davis
parent 46ee815459
commit ce85a4d847
2 changed files with 65 additions and 44 deletions
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3
libs/ardour/ardour/ticker.h
View File

@ -19,6 +19,7 @@
*/
#include <boost/noncopyable.hpp>
#include <boost/scoped_ptr.hpp>
#include "pbd/signals.h"
@ -75,7 +76,7 @@ private:
double _last_tick;
class Position;
Position* _pos;
boost::scoped_ptr<Position> _pos;
double one_ppqn_in_frames (framepos_t transport_position);

106
libs/ardour/ticker.cc
View File

@ -58,27 +58,28 @@ public:
if (frame != fr) {
frame = fr;
s->bbt_time (this->frame, *this);
const TempoMap& tempo = s->tempo_map();
const double divisions = tempo.meter_at(frame).divisions_per_bar();
const double divisor = tempo.meter_at(frame).note_divisor();
const double qnote_scale = divisor * 0.25f;
/* Midi Beats in terms of Song Position Pointer is equivalent to total
sixteenth notes at 'time' */
midi_beats = (((bars - 1) * divisions) + beats - 1);
midi_beats += (double)ticks / (double)Position::ticks_per_beat * qnote_scale;
midi_beats *= 16.0f / divisor;
midi_clocks = midi_beats * 6.0f;
didit = true;
}
/* Midi beats and clocks always gets updated for now */
s->bbt_time (this->frame, *this);
const TempoMap& tempo = s->tempo_map();
const double divisions = tempo.meter_at(frame).divisions_per_bar();
const double divisor = tempo.meter_at(frame).note_divisor();
const double qnote_scale = divisor * 0.25f;
/** Midi Beats in terms of Song Position Pointer is equivalent to total
sixteenth notes at 'time' */
midi_beats = (((bars - 1) * divisions) + beats - 1);
midi_beats += (double)ticks / (double)Position::ticks_per_beat * qnote_scale;
midi_beats *= 16.0f / divisor;
midi_clocks = midi_beats * 6.0f;
return didit;
}
@ -98,16 +99,13 @@ MidiClockTicker::MidiClockTicker ()
, _ppqn (24)
, _last_tick (0.0)
{
_pos = new Position();
_pos.reset (new Position());
}
MidiClockTicker::~MidiClockTicker()
{
_midi_port = 0;
if (_pos) {
delete _pos;
_pos = 0;
}
_pos.reset (0);
}
void
@ -126,8 +124,6 @@ MidiClockTicker::set_session (Session* s)
}
}
static bool need_reset = false;
void
MidiClockTicker::session_located()
{
@ -138,13 +134,33 @@ MidiClockTicker::session_located()
}
_last_tick = _pos->frame;
need_reset = true;
if (_pos->speed == 0.0f && Config->get_send_midi_clock()) {
uint32_t where = std::floor (_pos->midi_beats);
send_position_event (where, 0);
if (!Config->get_send_midi_clock()) {
return;
}
if (_pos->speed == 0.0f) {
uint32_t where = llrint (_pos->midi_beats);
send_position_event (where, 0);
} else if (_pos->speed == 1.0f) {
#if 1
/* Experimental. To really do this and have accuracy, the
stop/locate/continue sequence would need queued to send immediately
before the next midi clock. */
send_stop_event (0);
if (_pos->frame == 0) {
send_start_event (0);
} else {
uint32_t where = llrint (_pos->midi_beats);
send_position_event (where, 0);
send_continue_event (0);
}
#endif
} else {
/* Varispeed not supported */
}
}
void
@ -209,7 +225,7 @@ MidiClockTicker::transport_state_changed()
} else if (_pos->speed == 0.0f) {
send_stop_event (0);
send_position_event (std::floor (_pos->midi_beats), 0);
send_position_event (llrint (_pos->midi_beats), 0);
}
// tick (_pos->frame);
@ -254,41 +270,45 @@ MidiClockTicker::transport_looped()
}
void
MidiClockTicker::tick (const framepos_t& transport_frame)
MidiClockTicker::tick (const framepos_t& /* transport_frame */)
{
if (!Config->get_send_midi_clock() || _session == 0 || _session->transport_speed() != 1.0f || _midi_port == 0) {
return;
}
MIDI::JackMIDIPort* mp = dynamic_cast<MIDI::JackMIDIPort*> (_midi_port);
if (! mp) {
return;
}
const framepos_t end = _pos->frame + mp->nframes_this_cycle();
double iter = _last_tick;
double clock_delta = one_ppqn_in_frames (transport_frame);
while (true) {
double next_tick = iter + clock_delta;
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, mp ? mp->nframes_this_cycle() : 0));
double clock_delta = one_ppqn_in_frames (llrint (iter));
double next_tick = iter + clock_delta;
frameoffset_t next_tick_offset = llrint (next_tick) - end;
DEBUG_TRACE (DEBUG::MidiClock,
string_compose ("Tick: iter: %1, last tick time: %2, next tick time: %3, offset: %4, cycle length: %5\n",
iter, _last_tick, next_tick, next_tick_offset, mp ? mp->nframes_this_cycle() : 0));
if (!mp || (next_tick_offset >= mp->nframes_this_cycle())) {
return;
break;
}
if (next_tick_offset >= 0) {
send_midi_clock_event (next_tick_offset);
_last_tick += clock_delta;
}
iter = next_tick;
}
_pos->frame = _last_tick;
_last_tick = iter;
_pos->frame = end;
}
double
MidiClockTicker::one_ppqn_in_frames (framepos_t transport_position)
{