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add required methods for region-relative time conversion

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This commit is contained in:
Paul Davis 2020-10-02 21:25:57 -06:00
parent 1b06fcb335
commit db8b054543
2 changed files with 79 additions and 1 deletions
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29
libs/ardour/ardour/region.h
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@ -278,6 +278,35 @@ public:
void set_video_locked (bool yn);
void set_position_locked (bool yn);
Temporal::timepos_t region_beats_to_absolute_time(Temporal::Beats beats) const;
/** Convert a timestamp in beats into timepos_t (both relative to region position) */
Temporal::timepos_t region_beats_to_region_time (Temporal::Beats beats) const {
return timepos_t (nt_position().distance (region_beats_to_absolute_time (beats)));
}
/** Convert a timestamp in beats relative to region position into beats relative to source start */
Temporal::Beats region_beats_to_source_beats (Temporal::Beats beats) const {
return nt_position().distance (region_beats_to_absolute_time (beats)).beats ();
}
/** Convert a distance within a region to beats relative to region position */
Temporal::Beats region_distance_to_region_beats (Temporal::timecnt_t const &) const;
/** Convert a timestamp in beats measured from source start into absolute beats */
Temporal::Beats source_beats_to_absolute_beats(Temporal::Beats beats) const;
/** Convert a timestamp in beats measured from source start into absolute samples */
Temporal::timepos_t source_beats_to_absolute_time(Temporal::Beats beats) const;
/** Convert a timestamp in beats measured from source start into region-relative samples */
Temporal::timepos_t source_beats_to_region_time(Temporal::Beats beats) const {
return timepos_t (nt_position().distance (source_beats_to_absolute_time (beats)));
}
/** Convert a timestamp in absolute time to beats measured from source start*/
Temporal::Beats absolute_time_to_source_beats(Temporal::timepos_t const &) const;
Temporal::Beats absolute_time_to_region_beats (Temporal::timepos_t const & b) const {
return b.distance (nt_position()).beats ();
}
int apply (Filter &, Progress* progress = 0);
boost::shared_ptr<ARDOUR::Playlist> playlist () const { return _playlist.lock(); }

51
libs/ardour/region.cc
View File

@ -1973,6 +1973,56 @@ Region::latest_possible_sample () const
return position_sample() + (minlen - start_sample()) - 1;
}
Temporal::TimeDomain
Region::position_time_domain() const
{
return _position.val().time_domain();
}
timepos_t
Region::nt_end() const
{
return _position.val() + _length.val();
}
Temporal::Beats
Region::region_distance_to_region_beats (timecnt_t const & region_relative_offset) const
{
return timecnt_t (region_relative_offset, nt_position()).beats ();
}
Temporal::Beats
Region::source_beats_to_absolute_beats (Temporal::Beats beats) const
{
return source_position().beats() + beats;
}
Temporal::timepos_t
Region::region_beats_to_absolute_time (Temporal::Beats beats) const
{
/* beats is an additional offset to the start point of the region, from
the effective start of the source on the timeline.
*/
return source_position() + nt_start () + beats;
}
Temporal::timepos_t
Region::source_beats_to_absolute_time (Temporal::Beats beats) const
{
/* return the time corresponding to `beats' relative to the start of
the source. The start of the source is an implied position given by
region->position - region->start
*/
return source_position() + beats;
}
Temporal::Beats
Region::absolute_time_to_source_beats(timepos_t const & time) const
{
const timepos_t s (source_position());
return time.earlier (timecnt_t (s, s)).beats();
}
timepos_t
Region::source_position () const
{
@ -1990,4 +2040,3 @@ Region::region_relative_position (timepos_t const & p) const
{
return p.earlier (_position.val());
}