shithub: opus

Download patch

ref: 8abd50ea1a5976a4058f7ba294f55b9dc9940968
parent: 6adea4b93ce15b5c6eab1be29da6e01806ee8853
author: Koen Vos <koenvos@users.noreply.github.com>
date: Fri Feb 19 10:38:31 EST 2016 

undo some loop unrolling


--- a/silk/fixed/pitch_analysis_core_FIX.c
+++ b/silk/fixed/pitch_analysis_core_FIX.c
@@ -174,16 +174,10 @@
     silk_resampler_down2( filt_state, frame_4kHz, frame_8kHz, frame_length_8kHz );
 
     /* Low-pass filter */
-	silk_assert( (frame_length_4kHz & 3) == 0 );
-    for( i = frame_length_4kHz - 1; i > 4; i -= 4 ) {
-        frame_4kHz[ i - 0 ] = silk_ADD_SAT16( frame_4kHz[ i - 0 ], frame_4kHz[ i - 1 ] );
-        frame_4kHz[ i - 1 ] = silk_ADD_SAT16( frame_4kHz[ i - 1 ], frame_4kHz[ i - 2 ] );
-        frame_4kHz[ i - 2 ] = silk_ADD_SAT16( frame_4kHz[ i - 2 ], frame_4kHz[ i - 3 ] );
-        frame_4kHz[ i - 3 ] = silk_ADD_SAT16( frame_4kHz[ i - 3 ], frame_4kHz[ i - 4 ] );
+    for( i = frame_length_4kHz - 1; i > 0; i-- ) {
+        frame_4kHz[ i ] = silk_ADD_SAT16( frame_4kHz[ i ], frame_4kHz[ i - 1 ] );
     }
-    frame_4kHz[ i - 0 ] = silk_ADD_SAT16( frame_4kHz[ i - 0 ], frame_4kHz[ i - 1 ] );
-    frame_4kHz[ i - 1 ] = silk_ADD_SAT16( frame_4kHz[ i - 1 ], frame_4kHz[ i - 2 ] );
-    frame_4kHz[ i - 2 ] = silk_ADD_SAT16( frame_4kHz[ i - 2 ], frame_4kHz[ i - 3 ] );
+
 
     /******************************************************************************
     * FIRST STAGE, operating in 4 khz
--- a/silk/float/find_pred_coefs_FLP.c
+++ b/silk/float/find_pred_coefs_FLP.c
@@ -43,7 +43,7 @@
     opus_int         i;
     silk_float       XXLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ];
     silk_float       xXLTP[ MAX_NB_SUBFR * LTP_ORDER ];
-    silk_float       invGains[ MAX_NB_SUBFR ], Wght[ MAX_NB_SUBFR ];
+    silk_float       invGains[ MAX_NB_SUBFR ];
     opus_int16       NLSF_Q15[ MAX_LPC_ORDER ];
     const silk_float *x_ptr;
     silk_float       *x_pre_ptr, LPC_in_pre[ MAX_NB_SUBFR * MAX_LPC_ORDER + MAX_FRAME_LENGTH ];
@@ -53,7 +53,6 @@
     for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
         silk_assert( psEncCtrl->Gains[ i ] > 0.0f );
         invGains[ i ] = 1.0f / psEncCtrl->Gains[ i ];
-        Wght[ i ]     = invGains[ i ] * invGains[ i ];
     }
 
     if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
--- a/silk/float/pitch_analysis_core_FLP.c
+++ b/silk/float/pitch_analysis_core_FLP.c
@@ -158,16 +158,9 @@
     silk_short2float_array( frame_4kHz, frame_4_FIX, frame_length_4kHz );
 
     /* Low-pass filter */
-	silk_assert( (frame_length_4kHz & 3) == 0 );
-    for( i = frame_length_4kHz - 1; i > 4; i -= 4 ) {
-        frame_4kHz[ i - 0 ] = silk_ADD_SAT16( frame_4kHz[ i - 0 ], frame_4kHz[ i - 1 ] );
-        frame_4kHz[ i - 1 ] = silk_ADD_SAT16( frame_4kHz[ i - 1 ], frame_4kHz[ i - 2 ] );
-        frame_4kHz[ i - 2 ] = silk_ADD_SAT16( frame_4kHz[ i - 2 ], frame_4kHz[ i - 3 ] );
-        frame_4kHz[ i - 3 ] = silk_ADD_SAT16( frame_4kHz[ i - 3 ], frame_4kHz[ i - 4 ] );
+    for( i = frame_length_4kHz - 1; i > 0; i-- ) {
+        frame_4kHz[ i ] = silk_ADD_SAT16( frame_4kHz[ i ], frame_4kHz[ i - 1 ] );
     }
-    frame_4kHz[ i - 0 ] = silk_ADD_SAT16( frame_4kHz[ i - 0 ], frame_4kHz[ i - 1 ] );
-    frame_4kHz[ i - 1 ] = silk_ADD_SAT16( frame_4kHz[ i - 1 ], frame_4kHz[ i - 2 ] );
-    frame_4kHz[ i - 2 ] = silk_ADD_SAT16( frame_4kHz[ i - 2 ], frame_4kHz[ i - 3 ] );
 
     /******************************************************************************
     * FIRST STAGE, operating in 4 khz