Temporal: add timeline.cc
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libs/temporal/timeline.cc
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507
libs/temporal/timeline.cc
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/*
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Copyright (C) 2017 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <cstdlib>
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#include <exception>
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#include <sstream>
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#include "pbd/enumwriter.h"
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#include "pbd/error.h"
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#include "pbd/compose.h"
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#include "pbd/i18n.h"
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#include "temporal/debug.h"
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#include "temporal/timeline.h"
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#include "temporal/tempo.h"
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using namespace PBD;
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using namespace Temporal;
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struct TemporalStatistics
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{
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int64_t audio_to_beats;
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int64_t audio_to_bars;
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int64_t beats_to_audio;
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int64_t beats_to_bars;
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int64_t bars_to_audio;
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int64_t bars_to_beats;
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TemporalStatistics ()
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: audio_to_beats (0)
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, audio_to_bars (0)
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, beats_to_audio (0)
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, beats_to_bars (0)
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, bars_to_audio (0)
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, bars_to_beats (0)
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{}
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void dump (std::ostream & str) {
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str << "TemporalStatistics\n"
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<< "Audio => Beats " << audio_to_beats
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<< "Audio => Bars " << audio_to_bars
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<< "Beats => Audio " << beats_to_audio
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<< "Beats => Bars " << beats_to_bars
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<< "Bars => Audio " << bars_to_audio
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<< "Bars => Beats " << bars_to_beats
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<< std::endl;
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}
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};
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static TemporalStatistics stats;
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/* timecnt */
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timecnt_t timecnt_t::_max_timecnt (max_samplepos, timepos_t());
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timecnt_t::timecnt_t (timecnt_t const & tc, timepos_t const & pos)
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: _position (pos)
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{
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if (tc.distance() < 0) {
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throw std::domain_error (X_("negative distance in timecnt constructor"));
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}
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_distance = tc.distance();
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assert (_position.is_beats() == _distance.flagged());
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}
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void
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timecnt_t::set_position (timepos_t const & pos)
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{
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_position = pos;
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}
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timecnt_t
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timecnt_t::abs () const
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{
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return timecnt_t (_distance.abs(), _position);
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}
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superclock_t
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timecnt_t::compute_superclocks() const
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{
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assert (_distance.flagged());
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TempoMap::SharedPtr tm (TempoMap::fetch());
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return tm->full_duration_at (_position, *this, AudioTime).superclocks();
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}
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Beats
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timecnt_t::compute_beats() const
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{
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assert (!_distance.flagged());
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TempoMap::SharedPtr tm (TempoMap::fetch());
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return tm->full_duration_at (_position, *this, BeatTime).beats();
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}
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timecnt_t
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timecnt_t::operator*(ratio_t const & r) const
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{
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return timecnt_t (int_div_round (_distance.val() * r.numerator(), r.denominator()), _position);
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}
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timecnt_t
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timecnt_t::operator/(ratio_t const & r) const
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{
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return timecnt_t (int_div_round (_distance.val() * r.denominator(), r.numerator()), _position);
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}
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timecnt_t
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timecnt_t::operator% (timecnt_t const & d) const
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{
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return timecnt_t (_distance % d.distance(), _position);
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}
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timecnt_t &
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timecnt_t::operator%= (timecnt_t const & d)
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{
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_distance %= d.distance();
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return *this;
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}
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bool
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timecnt_t::string_to (std::string const & str)
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{
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#warning paul how to do this with two timepos_t
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}
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std::string
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timecnt_t::to_string () const
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{
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#warning paul how to do this with two timepos_t
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return std::string();
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}
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/* timepos */
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timepos_t::timepos_t (timecnt_t const & t)
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{
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if (t.distance() < 0) {
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throw std::domain_error("negative value for timepos_t constructor");
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}
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v = t.distance ();
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}
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// timepos_t timepos_t::_max_timepos (Temporal::AudioTime);
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timepos_t &
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timepos_t::operator= (timecnt_t const & t)
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{
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v = t.distance();
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return *this;
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}
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void
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timepos_t::set_superclock (superclock_t s)
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{
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v = s;
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}
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void
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timepos_t::set_beat (Beats const & b)
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{
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v = build (true, b.to_ticks());
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}
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superclock_t
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timepos_t::_superclocks () const
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{
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stats.beats_to_audio++;
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TempoMap::SharedPtr tm (TempoMap::fetch());
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return tm->superclock_at (beats ());
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}
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Temporal::Beats
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timepos_t::_beats () const
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{
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stats.audio_to_beats++;
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TempoMap::SharedPtr tm (TempoMap::fetch());
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return tm->quarter_note_at (v);
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}
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int64_t
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timepos_t::_ticks () const
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{
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return _beats().to_ticks();
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}
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timepos_t
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timepos_t::operator/(ratio_t const & n) const
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{
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assert (n >= 0); /* do not allow a position to become negative via division */
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/* note: v / (N/D) = (v * D) / N */
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return timepos_t (int_div_round (val() * n.denominator(), n.numerator()));
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}
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timepos_t
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timepos_t::operator*(ratio_t const & n) const
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{
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assert (n >= 0); /* do not allow a position to become negative via multiplication */
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return timepos_t (int_div_round (val() * n.numerator(), n.denominator()));
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}
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timepos_t &
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timepos_t::operator/=(ratio_t const & n)
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{
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assert (n >= 0); /* do not allow a position to become negative via division */
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v = build (flagged(), int_div_round (val() * n.numerator(), n.denominator()));
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return *this;
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}
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timepos_t &
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timepos_t::operator*=(ratio_t const & n)
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{
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assert (n >= 0); /* do not allow a position to become negative via multiplication */
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v = build (flagged(), int_div_round (val() * n.denominator(), n.numerator()));
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return *this;
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}
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timepos_t
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timepos_t::expensive_add (Beats const & b) const
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{
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assert (is_beats());
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return timepos_t (beats() + b);
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}
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timepos_t
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timepos_t::expensive_add (superclock_t sc) const
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{
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return timepos_t (val() + sc);
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}
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/* */
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/* ::distance() assumes that @param d is later on the timeline than this, and
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* thus returns a positive value if this condition is satisfied.
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*/
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timecnt_t
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timepos_t::distance (superclock_t s) const
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{
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if (is_superclock()) {
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return timecnt_t (s - val(), *this);
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}
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return expensive_distance (s);
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}
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timecnt_t
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timepos_t::distance (Beats const & b) const
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{
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if (is_beats()) {
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return timecnt_t ((b - _beats()).to_ticks(), *this);
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}
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return expensive_distance (b);
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}
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timecnt_t
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timepos_t::distance (timepos_t const & d) const
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{
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if (d.is_beats()) {
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return distance (d._beats());
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}
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return distance (d._superclocks());
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}
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timecnt_t
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timepos_t::expensive_distance (superclock_t s) const
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{
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if (is_superclock() && (val() < s)) {
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PBD::warning << string_compose (_("programming warning: sample arithmetic will generate negative sample time (%1 - %2)"), superclocks(), s) << endmsg;
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}
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return timecnt_t (s - superclocks(), *this);
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}
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timecnt_t
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timepos_t::expensive_distance (Temporal::Beats const & b) const
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{
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return timecnt_t (b - beats(), *this);
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}
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/* */
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timepos_t
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timepos_t:: earlier (superclock_t s) const
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{
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superclock_t sc;
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if (is_beats()) {
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TempoMap::SharedPtr tm (TempoMap::fetch());
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sc = tm->superclock_at (beats());
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} else {
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sc = val();
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}
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if (sc < s) {
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PBD::warning << string_compose (_("programming warning: sample arithmetic will generate negative sample time (%1 - %2)"), superclocks(), s) << endmsg;
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}
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return timepos_t (sc - s);
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}
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timepos_t
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timepos_t::earlier (Temporal::Beats const & b) const
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{
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Beats bb;
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if (is_superclock()) {
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TempoMap::SharedPtr tm (TempoMap::fetch());
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bb = tm->quarter_note_at (superclocks());
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} else {
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bb = beats ();
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}
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return timepos_t (bb - b);
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}
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timepos_t
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timepos_t::earlier (timepos_t const & other) const
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{
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if (other.is_superclock()) {
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return earlier (other.superclocks());
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}
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return earlier (other.beats());
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}
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timepos_t
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timepos_t::earlier (timecnt_t const & distance) const
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{
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if (distance.time_domain() == AudioTime) {
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return earlier (distance.superclocks());
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}
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return earlier (distance.beats());
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}
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/* */
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timepos_t &
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timepos_t::shift_earlier (timecnt_t const & d)
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{
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if (d.time_domain() == AudioTime) {
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return shift_earlier (d.superclocks());
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}
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return shift_earlier (d.beats());
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}
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timepos_t &
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timepos_t:: shift_earlier (superclock_t s)
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{
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superclock_t sc;
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if (is_beats ()) {
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TempoMap::SharedPtr tm (TempoMap::fetch());
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sc = tm->superclock_at (beats());
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} else {
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sc = val();
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}
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v = sc - s;
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return *this;
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}
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timepos_t &
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timepos_t::shift_earlier (Temporal::Beats const & b)
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{
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Beats bb;
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if (is_superclock()) {
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TempoMap::SharedPtr tm (TempoMap::fetch());
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bb = tm->quarter_note_at (val());
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} else {
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bb = beats ();
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}
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v = (bb - b).to_ticks();
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return *this;
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}
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/* */
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timepos_t &
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timepos_t:: operator+= (superclock_t s)
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{
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if (is_superclock()) {
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v += s;
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} else {
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TempoMap::SharedPtr tm (TempoMap::fetch());
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#warning paul imeplement TempoMap::beats_plus_superclock_as_beats
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}
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return *this;
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}
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timepos_t &
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timepos_t::operator+=(Temporal::Beats const & b)
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{
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if (is_beats()) {
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v += build (true, b.to_ticks());
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} else {
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TempoMap::SharedPtr tm (TempoMap::fetch());
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v = tm->superclock_plus_quarters_as_superclock (val(), b);
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}
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return *this;
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}
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/* */
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timepos_t
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timepos_t::operator+(timecnt_t const & d) const
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{
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if (d.time_domain() == AudioTime) {
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return operator+ (d.superclocks());
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}
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return operator+ (d.beats());
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}
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timepos_t &
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timepos_t::operator+=(timecnt_t const & d)
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{
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if (d.time_domain() == AudioTime) {
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return operator+= (d.superclocks());
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}
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return operator+= (d.beats());
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}
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std::ostream&
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std::operator<< (std::ostream & o, timepos_t const & tp)
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{
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return o << tp.to_string();
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}
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std::string
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timepos_t::to_string () const
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{
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if (is_beats()) {
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return string_compose ("b%1", val());
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}
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return string_compose ("a%1", val());
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}
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bool
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timepos_t::string_to (std::string const & str)
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{
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using std::string;
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using std::cerr;
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using std::endl;
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superclock_t s;
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Beats beats;
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if (isdigit (str[0])) {
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/* old school position format: we assume samples */
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std::stringstream ss (str);
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ss >> s;
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set_superclock (s);
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cerr << "deserialized timepos from older " << str << " as " << *this << endl;
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return true;
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}
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std::stringstream ss (str.substr (1));
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switch (str[0]) {
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case 'a':
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ss >> s;
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set_superclock (s);
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cerr << "deserialized timepos from " << str << " as " << *this << endl;
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return true;
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case 'b':
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ss >> beats;
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set_beat (beats);
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cerr << "deserialized timepos from " << str << " as " << *this << endl;
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return true;
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}
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std::cerr << "Unknown timepos string representation \"" << str << "\"" << std::endl;
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return false;
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}
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