Sync opus codec to upstream git

Sync opus codec to upstream commit
02fed471a4568852d6618e041c4f2af0d7730ee2 (August 30 2013)

This brings in a lot of optimizations but also makes the diff
between our codec and the upstream much smaller as most of our
optimizations have been upstreamed or supeceded.

Speedups across the board for CELT mode files:

        64kbps      128kbps
H300    9.82MHz     15.48MHz
c200	4.86MHz     9.63MHz
fuze v1 10.32MHz    15.92MHz

For the silk mode test file (16kbps) arm targets get a speedup
of about 2MHz while the H300 is 7.8MHz slower, likely because it's
now using the pseudostack more rather than the real stack which
is in iram. Patches to get around that are upcomming.

Change-Id: Ifecf963e461c51ac42e09dac1e91bc4bc3b12fa3

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/rbcodec/codecs/libopus/celt/entcode.c b/lib/rbcodec/codecs/libopus/celt/entcode.c
index 80e64fefaa..fa5d7c7c2c 100644
--- a/lib/rbcodec/codecs/libopus/celt/entcode.c
+++ b/lib/rbcodec/codecs/libopus/celt/entcode.c
@@ -26,13 +26,18 @@
 */
 
 #ifdef HAVE_CONFIG_H
-#include "opus_config.h"
+#include "config.h"
 #endif
 
 #include "entcode.h"
 #include "arch.h"
 
 #if !defined(EC_CLZ)
+/*This is a fallback for systems where we don't know how to access
+   a BSR or CLZ instruction (see ecintrin.h).
+  If you are optimizing Opus on a new platform and it has a native CLZ or
+   BZR (e.g. cell, MIPS, x86, etc) then making it available to Opus will be
+   an easy performance win.*/
 int ec_ilog(opus_uint32 _v){
   /*On a Pentium M, this branchless version tested as the fastest on
      1,000,000,000 random 32-bit integers, edging out a similar version with