From 871fd0585082b5e00b5b0053dadd298b9ddf60b6 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Thu, 25 Jul 2013 09:53:47 +0100
Subject: Add comment.

---
 src/lib/player.cc | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/lib')

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 */
-- 
cgit v1.2.3