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livetrax/libs/ardour/session_time.cc

291 lines
7.2 KiB
C++

/*
Copyright (C) 1999-2002 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef WAF_BUILD
#include "libardour-config.h"
#endif
#include <iostream>
#include <cmath>
#include <unistd.h>
#include "ardour/timestamps.h"
#include "pbd/error.h"
#include "pbd/enumwriter.h"
#include "pbd/stacktrace.h"
#include "ardour/session.h"
#include "ardour/tempo.h"
#include "i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
/* BBT TIME*/
void
Session::bbt_time (framepos_t when, Timecode::BBT_Time& bbt)
{
_tempo_map->bbt_time (when, bbt);
}
/* Timecode TIME */
double
Session::timecode_frames_per_second() const
{
return Timecode::timecode_to_frames_per_second (config.get_timecode_format());
}
bool
Session::timecode_drop_frames() const
{
return Timecode::timecode_has_drop_frames(config.get_timecode_format());
}
void
Session::sync_time_vars ()
{
_current_frame_rate = (framecnt_t) round (_base_frame_rate * (1.0 + (config.get_video_pullup()/100.0)));
_frames_per_timecode_frame = (double) _current_frame_rate / (double) timecode_frames_per_second();
if (timecode_drop_frames()) {
_frames_per_hour = (int32_t)(107892 * _frames_per_timecode_frame);
} else {
_frames_per_hour = (int32_t)(3600 * rint(timecode_frames_per_second()) * _frames_per_timecode_frame);
}
_timecode_frames_per_hour = rint(timecode_frames_per_second() * 3600.0);
last_timecode_valid = false;
// timecode type bits are the middle two in the upper nibble
switch ((int) ceil (timecode_frames_per_second())) {
case 24:
mtc_timecode_bits = 0;
break;
case 25:
mtc_timecode_bits = 0x20;
break;
case 30:
default:
if (timecode_drop_frames()) {
mtc_timecode_bits = 0x40;
} else {
mtc_timecode_bits = 0x60;
}
break;
};
ltc_tx_parse_offset();
}
void
Session::timecode_to_sample( Timecode::Time& timecode, framepos_t& sample, bool use_offset, bool use_subframes ) const
{
timecode.rate = timecode_frames_per_second();
Timecode::timecode_to_sample(
timecode, sample, use_offset, use_subframes,
_current_frame_rate,
config.get_subframes_per_frame(),
config.get_timecode_offset_negative(), config.get_timecode_offset()
);
}
void
Session::sample_to_timecode (framepos_t sample, Timecode::Time& timecode, bool use_offset, bool use_subframes ) const
{
Timecode::sample_to_timecode (
sample, timecode, use_offset, use_subframes,
timecode_frames_per_second(),
timecode_drop_frames(),
double(_current_frame_rate),
config.get_subframes_per_frame(),
config.get_timecode_offset_negative(), config.get_timecode_offset()
);
}
void
Session::timecode_time (framepos_t when, Timecode::Time& timecode)
{
if (last_timecode_valid && when == last_timecode_when) {
timecode = last_timecode;
return;
}
this->sample_to_timecode( when, timecode, true /* use_offset */, false /* use_subframes */ );
last_timecode_when = when;
last_timecode = timecode;
last_timecode_valid = true;
}
void
Session::timecode_time_subframes (framepos_t when, Timecode::Time& timecode)
{
if (last_timecode_valid && when == last_timecode_when) {
timecode = last_timecode;
return;
}
this->sample_to_timecode( when, timecode, true /* use_offset */, true /* use_subframes */ );
last_timecode_when = when;
last_timecode = timecode;
last_timecode_valid = true;
}
void
Session::timecode_duration (framecnt_t when, Timecode::Time& timecode) const
{
this->sample_to_timecode( when, timecode, false /* use_offset */, true /* use_subframes */ );
}
void
Session::timecode_duration_string (char* buf, size_t len, framepos_t when) const
{
Timecode::Time timecode;
timecode_duration (when, timecode);
snprintf (buf, len, "%02" PRIu32 ":%02" PRIu32 ":%02" PRIu32 ":%02" PRIu32, timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
}
void
Session::timecode_time (Timecode::Time &t)
{
timecode_time (_transport_frame, t);
}
int
Session::backend_sync_callback (TransportState state, framepos_t pos)
{
bool slave = synced_to_engine();
switch (state) {
case TransportStopped:
if (slave && _transport_frame != pos && post_transport_work() == 0) {
request_locate (pos, false);
// cerr << "SYNC: stopped, locate to " << pos->frame << " from " << _transport_frame << endl;
return false;
} else {
return true;
}
case TransportStarting:
// cerr << "SYNC: starting @ " << pos->frame << " a@ " << _transport_frame << " our work = " << post_transport_work() << " pos matches ? " << (_transport_frame == pos->frame) << endl;
if (slave) {
return _transport_frame == pos && post_transport_work() == 0;
} else {
return true;
}
break;
case TransportRolling:
// cerr << "SYNC: rolling slave = " << slave << endl;
if (slave) {
start_transport ();
}
break;
default:
error << string_compose (_("Unknown transport state %1 in sync callback"), state)
<< endmsg;
}
return true;
}
ARDOUR::framecnt_t
Session::convert_to_frames (AnyTime const & position)
{
double secs;
switch (position.type) {
case AnyTime::BBT:
return _tempo_map->frame_time (position.bbt);
break;
case AnyTime::Timecode:
/* XXX need to handle negative values */
secs = position.timecode.hours * 60 * 60;
secs += position.timecode.minutes * 60;
secs += position.timecode.seconds;
secs += position.timecode.frames / timecode_frames_per_second();
if (config.get_timecode_offset_negative()) {
return (framecnt_t) floor (secs * frame_rate()) - config.get_timecode_offset();
} else {
return (framecnt_t) floor (secs * frame_rate()) + config.get_timecode_offset();
}
break;
case AnyTime::Seconds:
return (framecnt_t) floor (position.seconds * frame_rate());
break;
case AnyTime::Frames:
return position.frames;
break;
}
return position.frames;
}
ARDOUR::framecnt_t
Session::any_duration_to_frames (framepos_t position, AnyTime const & duration)
{
double secs;
switch (duration.type) {
case AnyTime::BBT:
return (framecnt_t) ( _tempo_map->framepos_plus_bbt (position, duration.bbt) - position);
break;
case AnyTime::Timecode:
/* XXX need to handle negative values */
secs = duration.timecode.hours * 60 * 60;
secs += duration.timecode.minutes * 60;
secs += duration.timecode.seconds;
secs += duration.timecode.frames / timecode_frames_per_second();
if (config.get_timecode_offset_negative()) {
return (framecnt_t) floor (secs * frame_rate()) - config.get_timecode_offset();
} else {
return (framecnt_t) floor (secs * frame_rate()) + config.get_timecode_offset();
}
break;
case AnyTime::Seconds:
return (framecnt_t) floor (duration.seconds * frame_rate());
break;
case AnyTime::Frames:
return duration.frames;
break;
}
return duration.frames;
}