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authorCarl Hetherington <cth@carlh.net>2013-07-25 09:53:47 +0100
committerCarl Hetherington <cth@carlh.net>2013-07-25 09:53:47 +0100
commit871fd0585082b5e00b5b0053dadd298b9ddf60b6 (patch)
tree526805d722703da9c14a68a93fd2b83b64bd2ef4 /src
parent4656657c27198d67a188b11e17c42c6ac58ecfba (diff)
Add comment.
Diffstat (limited to 'src')
-rw-r--r--src/lib/player.cc3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/lib/player.cc b/src/lib/player.cc
index 37f172f1d..8cc1849e8 100644
--- a/src/lib/player.cc
+++ b/src/lib/player.cc
@@ -295,6 +295,9 @@ Player::process_audio (weak_ptr<Piece> weak_piece, shared_ptr<const AudioBuffers
audio = dcp_mapped;
+ /* Convert frame to time. After resampling, the frame time (in the DCP rate) will be T_D where
+ T_D = frame * DCP_rate / original_rate. Hence the time in seconds is T_D / DCP_rate.
+ */
Time time = content->start() + (frame * TIME_HZ / _film->audio_frame_rate()) + (content->audio_delay() * TIME_HZ / 1000);
/* We must cut off anything that comes before the start of all time */