From 455284ebc1ac276f5d7a93c636ca18530628d14c Mon Sep 17 00:00:00 2001 From: Tilghman Lesher Date: Mon, 24 Nov 2008 21:52:34 +0000 Subject: [PATCH] Add a bit of documentation (thanks, I-MOD) on what the silence threshold constant actually does and what values are valid for it. git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@158857 65c4cc65-6c06-0410-ace0-fbb531ad65f3 --- main/dsp.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/main/dsp.c b/main/dsp.c index e5db83cd55..6963bda2c2 100644 --- a/main/dsp.c +++ b/main/dsp.c @@ -105,6 +105,13 @@ static struct progress { { GSAMP_SIZE_UK, { 400 } }, /*!< UK */ }; +/*!\brief This value is the minimum threshold, calculated by averaging all + * of the samples within a frame, for which a frame is determined to either + * be silence (below the threshold) or noise (above the threshold). Please + * note that while the default threshold is an even exponent of 2, there is + * no requirement that it be so. The threshold will accept any value between + * 0 and 32767. + */ #define DEFAULT_THRESHOLD 512 enum busy_detect {