diff options
Diffstat (limited to 'src/lib/video_content.cc')
| -rw-r--r-- | src/lib/video_content.cc | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/lib/video_content.cc b/src/lib/video_content.cc index 347836855..d0eab4dbf 100644 --- a/src/lib/video_content.cc +++ b/src/lib/video_content.cc @@ -26,6 +26,8 @@ #include "compose.hpp" #include "config.h" #include "colour_conversion.h" +#include "util.h" +#include "film.h" #include "i18n.h" @@ -289,3 +291,21 @@ VideoContent::video_size_after_crop () const { return crop().apply (video_size_after_3d_split ()); } + +/** @param t A time offset from the start of this piece of content. + * @return Corresponding frame index. + */ +VideoContent::Frame +VideoContent::time_to_content_video_frames (Time t) const +{ + shared_ptr<const Film> film = _film.lock (); + assert (film); + + FrameRateConversion frc (video_frame_rate(), film->video_frame_rate()); + + /* Here we are converting from time (in the DCP) to a frame number in the content. + Hence we need to use the DCP's frame rate and the double/skip correction, not + the source's rate. + */ + return t * film->video_frame_rate() / (frc.factor() * TIME_HZ); +} |