Sync to upstream libopus

Sync to commit bb4b6885a139644cf3ac14e7deda9f633ec2d93c

This brings in a bunch of optimizations to decode speed
and memory usage. Allocations are switched from using
the pseudostack to using the real stack. Enabled hacks
to reduce stack usage.

This should fix crashes on sansa clip, although some
files will not play due to failing allocations in the
codec buffer.

Speeds up decoding of the following test files:

                 H300 (cf)   C200 (arm7tdmi)  ipod classic (arm9e)
16 kbps (silk)   14.28 MHz   4.00 MHz         2.61 MHz
64 kbps (celt)   4.09 MHz    8.08 MHz         6.24 MHz
128 kbps (celt)  1.93 MHz    8.83 MHz         6.53 MHz

Change-Id: I851733a8a5824b61feb363a173091bc7e6629b58

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/rbcodec/codecs/libopus/config.h b/lib/rbcodec/codecs/libopus/config.h
index 1ce75ff590..f9fdfb0ec8 100644
--- a/lib/rbcodec/codecs/libopus/config.h
+++ b/lib/rbcodec/codecs/libopus/config.h
@@ -9,7 +9,8 @@
 #define OPUS_BUILD
 
 /* alloc stuff */
-#define NONTHREADSAFE_PSEUDOSTACK
+#define VAR_ARRAYS
+#define NORM_ALIASING_HACK
 
 #define OVERRIDE_OPUS_ALLOC
 #define OVERRIDE_OPUS_FREE
@@ -40,6 +41,7 @@
 #endif
 
 #if defined(CPU_ARM)
+#define OPUS_ARM_ASM
 #if ARM_ARCH == 4
 #define OPUS_ARM_INLINE_ASM
 #elif ARM_ARCH > 4