SILK fixes following last codec WG meeting

decoder:
- fixed incorrect scaling of filter states for the smallest quantization
  step sizes
- NLSF2A now limits the prediction gain of LPC filters

encoder:
- increased damping of LTP coefficients in LTP analysis
- increased white noise fraction in noise shaping LPC analysis
- introduced maximum total prediction gain.  Used by Burg's method to
  exit early if prediction gain is exceeded.  This improves packet
  loss robustness and numerical robustness in Burg's method
- Prefiltered signal is now in int32 Q10 domain, from int16 Q0
- Increased max number of iterations in CBR gain control loop from 5 to 6
- Removed useless code from LTP scaling control
- Optimization: smarter LPC loop unrolling
- Switched default win32 compile mode to be floating-point

resampler:
- made resampler have constant delay of 0.75 ms; removed delay
  compensation from silk code.
- removed obsolete table entries (~850 Bytes)
- increased downsampling filter order from 16 to 18/24/36 (depending on
  frequency ratio)
- reoptimized filter coefficients

1 files changed, 3 insertions, 3 deletions

diff --git a/silk/NLSF_decode.c b/silk/NLSF_decode.c
index b1b83ae9..124be417 100644
--- a/silk/NLSF_decode.c
+++ b/silk/NLSF_decode.c
@@ -77,7 +77,7 @@ void silk_NLSF_decode(
     /* Decode first stage */
     pCB_element = &psNLSF_CB->CB1_NLSF_Q8[ NLSFIndices[ 0 ] * psNLSF_CB->order ];
     for( i = 0; i < psNLSF_CB->order; i++ ) {
-        pNLSF_Q15[ i ] = silk_LSHIFT( ( opus_int16 )pCB_element[ i ], 7 );
+        pNLSF_Q15[ i ] = silk_LSHIFT( (opus_int16)pCB_element[ i ], 7 );
     }
 
     /* Unpack entropy table indices and predictor for current CB1 index */
@@ -91,8 +91,8 @@ void silk_NLSF_decode(
 
     /* Apply inverse square-rooted weights and add to output */
     for( i = 0; i < psNLSF_CB->order; i++ ) {
-        W_tmp_Q9 = silk_SQRT_APPROX( silk_LSHIFT( ( opus_int32 )W_tmp_QW[ i ], 18 - NLSF_W_Q ) );
-        NLSF_Q15_tmp = silk_ADD32( pNLSF_Q15[ i ], silk_DIV32_16( silk_LSHIFT( ( opus_int32 )res_Q10[ i ], 14 ), W_tmp_Q9 ) );
+        W_tmp_Q9 = silk_SQRT_APPROX( silk_LSHIFT( (opus_int32)W_tmp_QW[ i ], 18 - NLSF_W_Q ) );
+        NLSF_Q15_tmp = silk_ADD32( pNLSF_Q15[ i ], silk_DIV32_16( silk_LSHIFT( (opus_int32)res_Q10[ i ], 14 ), W_tmp_Q9 ) );
         pNLSF_Q15[ i ] = (opus_int16)silk_LIMIT( NLSF_Q15_tmp, 0, 32767 );
     }