From 837412d37bbca32bb34bfb5941e132ff4b0a568c Mon Sep 17 00:00:00 2001
From: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date: Wed, 3 Nov 2010 20:47:11 -0400
Subject: [PATCH] Pitch estimation tuning to prevent some cases of pitch
halving
---
libcelt/pitch.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libcelt/pitch.c b/libcelt/pitch.c
index 8c1ab9ea..2e031557 100644
--- a/libcelt/pitch.c
+++ b/libcelt/pitch.c
@@ -328,11 +328,11 @@ celt_word16 remove_doubling(celt_word16 *x, int maxperiod, int minperiod,
#endif
if (abs(T1-prev_period)<=2)
cont = prev_gain;
- else if (abs(T1-prev_period)<=4)
+ else if (abs(T1-prev_period)<=4 && 5*k*k < T0)
cont = HALF32(prev_gain);
else
cont = 0;
- if (g1 > MULT16_16_Q15(QCONST16(.85f,15),g0)-cont || g1 > QCONST16(.5f,15)-cont)
+ if (g1 > QCONST16(.3f,15) + MULT16_16_Q15(QCONST16(.4f,15),g0)-cont)
{
best_xy = xy;
best_yy = yy;
--
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