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, 4 deletions

diff --git a/lib/rbcodec/codecs/libopus/silk/decode_core.c b/lib/rbcodec/codecs/libopus/silk/decode_core.c
index 87fbd5de9f..af68b75da9 100644
--- a/lib/rbcodec/codecs/libopus/silk/decode_core.c
+++ b/lib/rbcodec/codecs/libopus/silk/decode_core.c
@@ -39,7 +39,7 @@ void silk_decode_core(
     silk_decoder_state          *psDec,                         /* I/O  Decoder state                               */
     silk_decoder_control        *psDecCtrl,                     /* I    Decoder control                             */
     opus_int16                  xq[],                           /* O    Decoded speech                              */
-    const opus_int              pulses[ MAX_FRAME_LENGTH ]      /* I    Pulse signal                                */
+    const opus_int16            pulses[ MAX_FRAME_LENGTH ]      /* I    Pulse signal                                */
 )
 {
     opus_int   i, k, lag = 0, start_idx, sLTP_buf_idx, NLSF_interpolation_flag, signalType;
@@ -49,7 +49,7 @@ void silk_decode_core(
     opus_int32 LTP_pred_Q13, LPC_pred_Q10, Gain_Q10, inv_gain_Q31, gain_adj_Q16, rand_seed, offset_Q10;
     opus_int32 *pred_lag_ptr, *pexc_Q14, *pres_Q14;
     VARDECL( opus_int32, res_Q14 );
-/*    VARDECL( opus_int32, sLPC_Q14 ); */
+    VARDECL( opus_int32, sLPC_Q14 );
     SAVE_STACK;
 
     silk_assert( psDec->prev_gain_Q16 != 0 );
@@ -57,8 +57,7 @@ void silk_decode_core(
     ALLOC( sLTP, psDec->ltp_mem_length, opus_int16 );
     ALLOC( sLTP_Q15, psDec->ltp_mem_length + psDec->frame_length, opus_int32 );
     ALLOC( res_Q14, psDec->subfr_length, opus_int32 );
-/*    ALLOC( sLPC_Q14, psDec->subfr_length + MAX_LPC_ORDER, opus_int32 ); */
-    opus_int32 sLPC_Q14[psDec->subfr_length + MAX_LPC_ORDER]; /* worst case is 80 + 16 */
+    ALLOC( sLPC_Q14, psDec->subfr_length + MAX_LPC_ORDER, opus_int32 );
 
     offset_Q10 = silk_Quantization_Offsets_Q10[ psDec->indices.signalType >> 1 ][ psDec->indices.quantOffsetType ];