From 027a202151ecddadfea7c772060fa1cd4fd3fbff Mon Sep 17 00:00:00 2001
From: Jean-Marc Valin <jmvalin@jmvalin.ca>
Date: Sat, 1 Dec 2012 22:00:53 -0500
Subject: [PATCH] More comments in the PLC
---
celt/celt_decoder.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/celt/celt_decoder.c b/celt/celt_decoder.c
index 78d5f2144..79e4df715 100644
--- a/celt/celt_decoder.c
+++ b/celt/celt_decoder.c
@@ -507,11 +507,14 @@ static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, opus_val16 * OPUS_R
attenuation = MULT16_16_Q15(attenuation, decay);
}
e[i] = SHL32(EXTEND32(MULT16_16_Q15(attenuation, exc[offset+i])), SIG_SHIFT);
+ /* Compute the energy of the previously decoded signal whose
+ excitation we're copying */
tmp = ROUND16(out_mem[c][-N+offset+i],SIG_SHIFT);
S1 += SHR32(MULT16_16(tmp,tmp),8);
}
- /* Last samples correctly decoded so we can have a continuous signal */
+ /* Copy the last decoded samples (prior to the overlap region) to
+ synthesis filter memory so we can have a continuous signal. */
for (i=0;i<LPC_ORDER;i++)
mem[i] = ROUND16(out_mem[c][MAX_PERIOD-N-1-i], SIG_SHIFT);
/* Apply the fading if not the first loss */
--
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