From b62ef0496c6e4e73848aa8db919e9df5444cb9e1 Mon Sep 17 00:00:00 2001
From: Max Horn
Date: Fri, 29 Jun 2007 23:33:16 +0000
Subject: Added small explanatory comment

svn-id: r27779
---
 sound/rate.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'sound')

diff --git a/sound/rate.cpp b/sound/rate.cpp
index 105b5d5d26..5944e64694 100644
--- a/sound/rate.cpp
+++ b/sound/rate.cpp
@@ -196,7 +196,11 @@ LinearRateConverter<stereo, reverseStereo>::LinearRateConverter(st_rate_t inrate
 
 	opos = FRAC_ONE;
 
-	/* increment */
+	// Compute the linear interpolation increment.
+	// This will overflow if inrate >= 2^16, and underflow if outrate >= 2^16.
+	// Also, if the quotient of the two rate becomes too small / too big, that
+	// would cause problems, but since we rarely scale from 1 to 65536 Hz or vice
+	// versa, I think we can live with that limiation ;-).
 	opos_inc = (inrate << FRAC_BITS) / outrate;
 
 	ilast0 = ilast1 = 0;
-- 
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