tweak the v21 detector to detect an additional pattern of hits and misses

........

Merged revisions 342605 from http://svn.asterisk.org/svn/asterisk/branches/10

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@342606 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/main/dsp.c b/main/dsp.c
index fdea748fd49bbbceb9012a7d2ef3bd8d1ad115bd..91eea6c9dacd44540316901cbbeb83078447bdbf 100644 (file)
--- a/main/dsp.c
+++ b/main/dsp.c
@@ -631,7 +631,7 @@ static int v21_detect(struct ast_dsp *dsp, v21_detect_state_t *s, int16_t *amp,
                }
 
                if (hit) {
-                       if (s->miss_count == 3) {
+                       if (s->miss_count == 3 || (s->hit_count == 1 && s->miss_count == 2)) {
                                s->hit_count++;
                        } else {
                                s->hit_count = 1;