diff options
Diffstat (limited to 'libs/ardour/ardour/types.h')
| -rw-r--r-- | libs/ardour/ardour/types.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/libs/ardour/ardour/types.h b/libs/ardour/ardour/types.h index 46ef2bade9..0a2fd62f7b 100644 --- a/libs/ardour/ardour/types.h +++ b/libs/ardour/ardour/types.h @@ -319,6 +319,27 @@ namespace ARDOUR { } }; + /* used for translating audio frames to an exact musical position using a note divisor. + an exact musical position almost never falls exactly on an audio frame, but for sub-sample + musical accuracy we need to derive exact musical locations from a frame position + the division follows TempoMap::exact_beat_at_frame(). + division + -1 musical location is the bar closest to frame + 0 musical location is the musical position of the frame + 1 musical location is the BBT beat closest to frame + n musical location is the quarter-note division n closest to frame + */ + struct MusicFrame { + framepos_t frame; + int32_t division; + + MusicFrame (framepos_t f, int32_t d) : frame (f), division (d) {} + + void set (framepos_t f, int32_t d) {frame = f; division = d; } + + MusicFrame operator- (MusicFrame other) { return MusicFrame (frame - other.frame, 0); } + }; + /* XXX: slightly unfortunate that there is this and Evoral::Range<>, but this has a uint32_t id which Evoral::Range<> does not. */ |