diff options
Diffstat (limited to 'libs/ardour/region.cc')
| -rw-r--r-- | libs/ardour/region.cc | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/libs/ardour/region.cc b/libs/ardour/region.cc index efaa104d35..a4a1584792 100644 --- a/libs/ardour/region.cc +++ b/libs/ardour/region.cc @@ -1654,3 +1654,33 @@ Region::set_start_internal (framecnt_t s) { _start = s; } + +framepos_t +Region::earliest_possible_position () const +{ + if (_start > _position) { + return 0; + } else { + return _position - _start; + } +} + +framecnt_t +Region::latest_possible_frame () const +{ + framecnt_t minlen = max_framecnt; + + for (SourceList::const_iterator i = _sources.begin(); i != _sources.end(); ++i) { + /* non-audio regions have a length that may vary based on their + * position, so we have to pass it in the call. + */ + minlen = min (minlen, (*i)->length (_position)); + } + + /* the latest possible last frame is determined by the current + * position, plus the shortest source extent past _start. + */ + + return _position + (minlen - _start) - 1; +} + |