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This commit is contained in:
Robin Gareus 2020-05-29 23:03:46 +02:00
parent 8e52ea74da
commit 677f4b4e53
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
2 changed files with 139 additions and 135 deletions
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64
libs/ardour/ardour/ticker.h
View File

@ -26,15 +26,14 @@
#include "pbd/signals.h" #include "pbd/signals.h"
#include "ardour/libardour_visibility.h" #include "ardour/libardour_visibility.h"
#include "ardour/types.h"
#include "ardour/session_handle.h" #include "ardour/session_handle.h"
#include "ardour/types.h"
#ifndef __libardour_ticker_h__ #ifndef __libardour_ticker_h__
#define __libardour_ticker_h__ #define __libardour_ticker_h__
namespace ARDOUR { namespace ARDOUR
{
class Session; class Session;
class MidiPort; class MidiPort;
@ -42,49 +41,56 @@ class LIBARDOUR_API MidiClockTicker : public SessionHandlePtr, boost::noncopyabl
{ {
public: public:
MidiClockTicker (); MidiClockTicker ();
virtual ~MidiClockTicker(); virtual ~MidiClockTicker ();
void tick (const samplepos_t& transport_samples, pframes_t nframes); void tick (const samplepos_t& transport_samples, pframes_t nframes);
bool has_midi_port() const { return _midi_port != 0; } bool has_midi_port () const
{
return _midi_port != 0;
}
void set_session (Session* s); void set_session (Session* s);
void session_going_away(); void session_going_away ();
/// slot for the signal session::MIDIClock_PortChanged /// slot for the signal session::MIDIClock_PortChanged
void update_midi_clock_port(); void update_midi_clock_port ();
/// slot for the signal session::TransportStateChange /// slot for the signal session::TransportStateChange
void transport_state_changed(); void transport_state_changed ();
/// slot for the signal session::TransportLooped /// slot for the signal session::TransportLooped
void transport_looped(); void transport_looped ();
/// slot for the signal session::Located /// slot for the signal session::Located
void session_located(); void session_located ();
/// pulses per quarter note (default 24) /// pulses per quarter note (default 24)
void set_ppqn(int ppqn) { _ppqn = ppqn; } void set_ppqn (int ppqn)
{
_ppqn = ppqn;
}
private: private:
boost::shared_ptr<MidiPort> _midi_port; boost::shared_ptr<MidiPort> _midi_port;
int _ppqn;
double _last_tick;
bool _send_pos;
bool _send_state;
class Position; int _ppqn;
boost::scoped_ptr<Position> _pos; double _last_tick;
bool _send_pos;
bool _send_state;
double one_ppqn_in_samples (samplepos_t transport_position); class Position;
boost::scoped_ptr<Position> _pos;
void send_midi_clock_event (pframes_t offset, pframes_t nframes); double one_ppqn_in_samples (samplepos_t transport_position);
void send_start_event (pframes_t offset, pframes_t nframes);
void send_continue_event (pframes_t offset, pframes_t nframes); void send_midi_clock_event (pframes_t offset, pframes_t nframes);
void send_stop_event (pframes_t offset, pframes_t nframes); void send_start_event (pframes_t offset, pframes_t nframes);
void send_position_event (uint32_t midi_clocks, pframes_t offset, pframes_t nframes); void send_continue_event (pframes_t offset, pframes_t nframes);
void send_stop_event (pframes_t offset, pframes_t nframes);
void send_position_event (uint32_t midi_clocks, pframes_t offset, pframes_t nframes);
}; };
} } // namespace ARDOUR
// namespace // namespace
#endif /* __libardour_ticker_h__ */ #endif /* __libardour_ticker_h__ */

210
libs/ardour/ticker.cc
View File

@ -29,13 +29,13 @@
#include "ardour/async_midi_port.h" #include "ardour/async_midi_port.h"
#include "ardour/audioengine.h" #include "ardour/audioengine.h"
#include "ardour/debug.h"
#include "ardour/lmath.h"
#include "ardour/midi_buffer.h" #include "ardour/midi_buffer.h"
#include "ardour/midi_port.h" #include "ardour/midi_port.h"
#include "ardour/lmath.h"
#include "ardour/ticker.h"
#include "ardour/session.h" #include "ardour/session.h"
#include "ardour/tempo.h" #include "ardour/tempo.h"
#include "ardour/debug.h" #include "ardour/ticker.h"
using namespace ARDOUR; using namespace ARDOUR;
using namespace PBD; using namespace PBD;
@ -44,81 +44,85 @@ using namespace PBD;
class MidiClockTicker::Position : public Timecode::BBT_Time class MidiClockTicker::Position : public Timecode::BBT_Time
{ {
public: public:
Position ()
: speed (0.0f)
, sample (0)
, midi_beats (0)
{
}
~Position () {}
Position() : speed(0.0f), sample(0), midi_beats(0) { } /** Sync timing information taken from the given Session
~Position() { } * @return True if timings differed
*/
/** Sync timing information taken from the given Session bool sync (Session* s)
* @return True if timings differed {
*/ bool changed = false;
bool sync (Session* s) { double sp = s->transport_speed ();
samplecnt_t fr = s->transport_sample ();
bool changed = false; if (speed != sp) {
speed = sp;
changed = true;
}
double sp = s->transport_speed(); if (sample != fr) {
samplecnt_t fr = s->transport_sample(); sample = fr;
changed = true;
}
if (speed != sp) { /* Midi beats and clocks always gets updated for now */
speed = sp;
changed = true;
}
if (sample != fr) { s->bbt_time (this->sample, *this);
sample = fr;
changed = true;
}
/* Midi beats and clocks always gets updated for now */ const TempoMap& tempo = s->tempo_map ();
const Meter& meter = tempo.meter_at_sample (sample);
s->bbt_time (this->sample, *this); const double divisions = meter.divisions_per_bar ();
const double divisor = meter.note_divisor ();
const double qnote_scale = divisor * 0.25f;
double mb;
const TempoMap& tempo = s->tempo_map(); /** Midi Beats in terms of Song Position Pointer is equivalent to total
const Meter& meter = tempo.meter_at_sample (sample); * sixteenth notes at 'time'
*/
const double divisions = meter.divisions_per_bar(); mb = (((bars - 1) * divisions) + beats - 1);
const double divisor = meter.note_divisor(); mb += (double)ticks / (double)Position::ticks_per_beat * qnote_scale;
const double qnote_scale = divisor * 0.25f; mb *= 16.0f / divisor;
double mb;
/** Midi Beats in terms of Song Position Pointer is equivalent to total if (mb != midi_beats) {
* sixteenth notes at 'time' midi_beats = mb;
*/ midi_clocks = midi_beats * 6.0f;
changed = true;
}
mb = (((bars - 1) * divisions) + beats - 1); return changed;
mb += (double)ticks / (double)Position::ticks_per_beat * qnote_scale; }
mb *= 16.0f / divisor;
if (mb != midi_beats) { double speed;
midi_beats = mb; samplecnt_t sample;
midi_clocks = midi_beats * 6.0f; double midi_beats;
changed = true; double midi_clocks;
}
return changed; void print (std::ostream& s)
} {
s << "samples: " << sample << " midi beats: " << midi_beats << " speed: " << speed;
double speed; }
samplecnt_t sample;
double midi_beats;
double midi_clocks;
void print (std::ostream& s) {
s << "samples: " << sample << " midi beats: " << midi_beats << " speed: " << speed;
}
}; };
MidiClockTicker::MidiClockTicker () MidiClockTicker::MidiClockTicker ()
: _ppqn (24) : _ppqn (24)
, _last_tick (0.0) , _last_tick (0.0)
, _send_pos (false) , _send_pos (false)
, _send_state (false) , _send_state (false)
{ {
_pos.reset (new Position()); _pos.reset (new Position ());
} }
MidiClockTicker::~MidiClockTicker() MidiClockTicker::~MidiClockTicker ()
{ {
_pos.reset (0); _pos.reset (0);
} }
@ -128,20 +132,20 @@ MidiClockTicker::set_session (Session* s)
{ {
SessionHandlePtr::set_session (s); SessionHandlePtr::set_session (s);
if (_session) { if (_session) {
_session->TransportStateChange.connect_same_thread (_session_connections, boost::bind (&MidiClockTicker::transport_state_changed, this)); _session->TransportStateChange.connect_same_thread (_session_connections, boost::bind (&MidiClockTicker::transport_state_changed, this));
_session->TransportLooped.connect_same_thread (_session_connections, boost::bind (&MidiClockTicker::transport_looped, this)); _session->TransportLooped.connect_same_thread (_session_connections, boost::bind (&MidiClockTicker::transport_looped, this));
_session->Located.connect_same_thread (_session_connections, boost::bind (&MidiClockTicker::session_located, this)); _session->Located.connect_same_thread (_session_connections, boost::bind (&MidiClockTicker::session_located, this));
update_midi_clock_port(); update_midi_clock_port ();
_pos->sync (_session); _pos->sync (_session);
} }
} }
void void
MidiClockTicker::session_located() MidiClockTicker::session_located ()
{ {
DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Session Located: %1, speed: %2\n", _session->transport_sample(), _session->transport_speed())); DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Session Located: %1, speed: %2\n", _session->transport_sample (), _session->transport_speed ()));
if (!_session || !_pos->sync (_session)) { if (!_session || !_pos->sync (_session)) {
return; return;
@ -149,7 +153,7 @@ MidiClockTicker::session_located()
_last_tick = _pos->sample; _last_tick = _pos->sample;
if (!Config->get_send_midi_clock()) { if (!Config->get_send_midi_clock ()) {
return; return;
} }
@ -159,76 +163,72 @@ MidiClockTicker::session_located()
void void
MidiClockTicker::session_going_away () MidiClockTicker::session_going_away ()
{ {
SessionHandlePtr::session_going_away(); SessionHandlePtr::session_going_away ();
_midi_port.reset (); _midi_port.reset ();
} }
void void
MidiClockTicker::update_midi_clock_port() MidiClockTicker::update_midi_clock_port ()
{ {
_midi_port = _session->midi_clock_output_port(); _midi_port = _session->midi_clock_output_port ();
} }
void void
MidiClockTicker::transport_state_changed() MidiClockTicker::transport_state_changed ()
{ {
if (_session->exporting()) { if (_session->exporting ()) {
/* no midi clock during export, for now */ /* no midi clock during export, for now */
return; return;
} }
if (!_session->engine().running()) { if (!_session->engine ().running ()) {
/* Engine stopped, we can't do anything */ /* Engine stopped, we can't do anything */
return; return;
} }
if (! _pos->sync (_session)) { if (!_pos->sync (_session)) {
return; return;
} }
DEBUG_TRACE (DEBUG::MidiClock, DEBUG_TRACE (DEBUG::MidiClock,
string_compose ("Transport state change @ %4, speed: %1 position: %2 play loop: %3\n", string_compose ("Transport state change @ %4, speed: %1 position: %2 play loop: %3\n",
_pos->speed, _pos->sample, _session->get_play_loop(), _pos->sample) _pos->speed, _pos->sample, _session->get_play_loop (), _pos->sample));
);
_last_tick = _pos->sample; _last_tick = _pos->sample;
if (! Config->get_send_midi_clock()) { if (!Config->get_send_midi_clock ()) {
return; return;
} }
_send_state = true; _send_state = true;
// tick (_pos->sample);
} }
void void
MidiClockTicker::transport_looped() MidiClockTicker::transport_looped ()
{ {
Location* loop_location = _session->locations()->auto_loop_location(); Location* loop_location = _session->locations ()->auto_loop_location ();
assert(loop_location); assert (loop_location);
DEBUG_TRACE (DEBUG::MidiClock, DEBUG_TRACE (DEBUG::MidiClock,
string_compose ("Transport looped, position: %1, loop start: %2, loop end: %3, play loop: %4\n", string_compose ("Transport looped, position: %1, loop start: %2, loop end: %3, play loop: %4\n",
_session->transport_sample(), loop_location->start(), loop_location->end(), _session->get_play_loop()) _session->transport_sample (), loop_location->start (), loop_location->end (), _session->get_play_loop ()));
);
// adjust _last_tick, so that the next MIDI clock message is sent // adjust _last_tick, so that the next MIDI clock message is sent
// in due time (and the tick interval is still constant) // in due time (and the tick interval is still constant)
samplecnt_t elapsed_since_last_tick = loop_location->end() - _last_tick; samplecnt_t elapsed_since_last_tick = loop_location->end () - _last_tick;
if (loop_location->start() > elapsed_since_last_tick) { if (loop_location->start () > elapsed_since_last_tick) {
_last_tick = loop_location->start() - elapsed_since_last_tick; _last_tick = loop_location->start () - elapsed_since_last_tick;
} else { } else {
_last_tick = 0; _last_tick = 0;
} }
} }
void void
MidiClockTicker::tick (const samplepos_t& /* transport_sample */, pframes_t nframes) MidiClockTicker::tick (const samplepos_t& transport_sample, pframes_t nframes)
{ {
if (!Config->get_send_midi_clock() || _session == 0 || _midi_port == 0) { if (!Config->get_send_midi_clock () || _session == 0 || _midi_port == 0) {
return; return;
} }
@ -251,13 +251,12 @@ MidiClockTicker::tick (const samplepos_t& /* transport_sample */, pframes_t nfra
_send_pos = false; _send_pos = false;
} }
if (_send_state) { if (_send_state) {
if (_pos->speed == 1.0f) { if (_pos->speed == 1.0f) {
if (_session->get_play_loop()) { if (_session->get_play_loop ()) {
assert(_session->locations()->auto_loop_location()); assert (_session->locations ()->auto_loop_location ());
if (_pos->sample == _session->locations()->auto_loop_location()->start()) { if (_pos->sample == _session->locations ()->auto_loop_location ()->start ()) {
send_start_event (0, nframes); send_start_event (0, nframes);
} else { } else {
send_continue_event (0, nframes); send_continue_event (0, nframes);
@ -279,22 +278,22 @@ MidiClockTicker::tick (const samplepos_t& /* transport_sample */, pframes_t nfra
_send_state = false; _send_state = false;
} }
if (_session->transport_speed() != 1.0f) { if (_session->transport_speed () != 1.0f) {
/* no varispeed support and nothing to do after this if stopped */ /* no varispeed support and nothing to do after this if stopped */
return; return;
} }
const samplepos_t end = _pos->sample + nframes; const samplepos_t end = _pos->sample + nframes;
double iter = _last_tick; double iter = _last_tick;
while (true) { while (true) {
double clock_delta = one_ppqn_in_samples (llrint (iter)); double clock_delta = one_ppqn_in_samples (llrint (iter));
double next_tick = iter + clock_delta; double next_tick = iter + clock_delta;
sampleoffset_t next_tick_offset = llrint (next_tick) - end; sampleoffset_t next_tick_offset = llrint (next_tick) - end;
DEBUG_TRACE (DEBUG::MidiClock, DEBUG_TRACE (DEBUG::MidiClock,
string_compose ("Tick: iter: %1, last tick time: %2, next tick time: %3, offset: %4, cycle length: %5\n", 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, nframes)); iter, _last_tick, next_tick, next_tick_offset, nframes));
if (next_tick_offset >= nframes) { if (next_tick_offset >= nframes) {
break; break;
@ -307,16 +306,16 @@ MidiClockTicker::tick (const samplepos_t& /* transport_sample */, pframes_t nfra
iter = next_tick; iter = next_tick;
} }
_last_tick = iter; _last_tick = iter;
_pos->sample = end; _pos->sample = end;
} }
double double
MidiClockTicker::one_ppqn_in_samples (samplepos_t transport_position) MidiClockTicker::one_ppqn_in_samples (samplepos_t transport_position)
{ {
const double samples_per_quarter_note = _session->tempo_map().samples_per_quarter_note_at (transport_position, _session->nominal_sample_rate()); const double samples_per_quarter_note = _session->tempo_map ().samples_per_quarter_note_at (transport_position, _session->nominal_sample_rate ());
return samples_per_quarter_note / double (_ppqn); return samples_per_quarter_note / double(_ppqn);
} }
void void
@ -342,7 +341,7 @@ MidiClockTicker::send_start_event (pframes_t offset, pframes_t nframes)
} }
static uint8_t msg = { MIDI_CMD_COMMON_START }; static uint8_t msg = { MIDI_CMD_COMMON_START };
MidiBuffer& mb (_midi_port->get_midi_buffer (nframes)); MidiBuffer& mb (_midi_port->get_midi_buffer (nframes));
mb.push_back (offset, 1, &msg); mb.push_back (offset, 1, &msg);
DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Start %1\n", _last_tick)); DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Start %1\n", _last_tick));
@ -356,7 +355,7 @@ MidiClockTicker::send_continue_event (pframes_t offset, pframes_t nframes)
} }
static uint8_t msg = { MIDI_CMD_COMMON_CONTINUE }; static uint8_t msg = { MIDI_CMD_COMMON_CONTINUE };
MidiBuffer& mb (_midi_port->get_midi_buffer (nframes)); MidiBuffer& mb (_midi_port->get_midi_buffer (nframes));
mb.push_back (offset, 1, &msg); mb.push_back (offset, 1, &msg);
DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Continue %1\n", _last_tick)); DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Continue %1\n", _last_tick));
@ -370,7 +369,7 @@ MidiClockTicker::send_stop_event (pframes_t offset, pframes_t nframes)
} }
static uint8_t msg = MIDI_CMD_COMMON_STOP; static uint8_t msg = MIDI_CMD_COMMON_STOP;
MidiBuffer& mb (_midi_port->get_midi_buffer (nframes)); MidiBuffer& mb (_midi_port->get_midi_buffer (nframes));
mb.push_back (offset, 1, &msg); mb.push_back (offset, 1, &msg);
DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Stop %1\n", _last_tick)); DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Stop %1\n", _last_tick));
@ -397,6 +396,5 @@ MidiClockTicker::send_position_event (uint32_t midi_beats, pframes_t offset, pfr
MidiBuffer& mb (_midi_port->get_midi_buffer (nframes)); MidiBuffer& mb (_midi_port->get_midi_buffer (nframes));
mb.push_back (offset, 3, &msg[0]); mb.push_back (offset, 3, &msg[0]);
DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Song Position Sent: %1 to %2 (events now %3, buf = %4)\n", midi_beats, _midi_port->name(), mb.size(), &mb)); DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Song Position Sent: %1 to %2 (events now %3, buf = %4)\n", midi_beats, _midi_port->name (), mb.size (), &mb));
} }