From 5f807c176fd9bc395f5e1cd030dfca3f0b14ba9f Mon Sep 17 00:00:00 2001
From: Jean-Marc Valin <jmvalin@jmvalin.ca>
Date: Tue, 7 Jan 2014 04:48:42 -0500
Subject: [PATCH] Adds SMALL_FOOTPRINT hack to the CELT PLC too
---
celt/celt_decoder.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/celt/celt_decoder.c b/celt/celt_decoder.c
index 7ee657b35..4be14dee7 100644
--- a/celt/celt_decoder.c
+++ b/celt/celt_decoder.c
@@ -442,7 +442,11 @@ static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, int N, int LM)
if (noise_based)
{
/* Noise-based PLC/CNG */
+#ifdef SMALL_FOOTPRINT
+ celt_norm *X;
+#else
VARDECL(celt_norm, X);
+#endif
opus_uint32 seed;
opus_val16 *plcLogE;
int end;
@@ -451,9 +455,13 @@ static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, int N, int LM)
end = st->end;
effEnd = IMAX(start, IMIN(end, mode->effEBands));
- /* Share the interleaved signal MDCT coefficient buffer with the
- deemphasis scratch buffer. */
+#ifdef SMALL_FOOTPRINT
+ /* This is an ugly hack that breaks aliasing rules and would be easily broken,
+ but it saves almost 4kB of stack. */
+ X = (celt_norm*)(out_syn[C-1]+overlap/2);
+#else
ALLOC(X, C*N, celt_norm); /**< Interleaved normalised MDCTs */
+#endif
if (loss_count >= 5)
plcLogE = backgroundLogE;
--
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