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Move preroll duration calc into libardour

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This commit is contained in:
Robin Gareus 2017-01-19 12:39:15 +01:00
parent 7939c2211c
commit 0f020e59b8
2 changed files with 17 additions and 0 deletions
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1
libs/ardour/ardour/session.h
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@ -1001,6 +1001,7 @@ class LIBARDOUR_API Session : public PBD::StatefulDestructible, public PBD::Scop
void request_preroll_record (framepos_t);
framepos_t preroll_record_in () const { return _preroll_record_in; }
bool preroll_record_enabled () const { return _preroll_record_in >= 0; }
framecnt_t preroll_samples (framepos_t) const;
/* temporary hacks to allow selection to be pushed from GUI into backend.
Whenever we move the selection object into libardour, these will go away.

16
libs/ardour/session.cc
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@ -2105,6 +2105,22 @@ Session::audible_frame () const
return std::max ((framepos_t)0, ret);
}
framecnt_t
Session::preroll_samples (framepos_t pos) const
{
const float pr = Config->get_preroll_seconds();
if (pos >= 0 && pr < 0) {
const Tempo& tempo = _tempo_map->tempo_at_frame (pos);
const Meter& meter = _tempo_map->meter_at_frame (pos);
return meter.frames_per_bar (tempo, frame_rate()) * -pr;
}
if (pr < 0) {
return 0;
}
return pr * frame_rate();
}
void
Session::set_frame_rate (framecnt_t frames_per_second)
{