Updating Opus to a pre-release of 1.1

silk/fixed/schur_FIX.c

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@@ skipping 35 matching lines @@
             C[ k ][ 0 ] = C[ k ][ 1 ] = silk_LSHIFT( c[ k ], lz );
         }
     } else {
         /* No need to shift */
         for( k = 0; k < order + 1; k++ ) {
             C[ k ][ 0 ] = C[ k ][ 1 ] = c[ k ];
         }
     }
 
     for( k = 0; k < order; k++ ) {
+        /* Check that we won't be getting an unstable rc, otherwise stop here. */
+        if (silk_abs_int32(C[ k + 1 ][ 0 ]) >= C[ 0 ][ 1 ]) {
+           if ( C[ k + 1 ][ 0 ] > 0 ) {
+              rc_Q15[ k ] = -SILK_FIX_CONST( .99f, 15 );
+           } else {
+              rc_Q15[ k ] = SILK_FIX_CONST( .99f, 15 );
+           }
+           k++;
+           break;
+        }
 
         /* Get reflection coefficient */
         rc_tmp_Q15 = -silk_DIV32_16( C[ k + 1 ][ 0 ], silk_max_32( silk_RSHIFT( C[ 0 ][ 1 ], 15 ), 1 ) );
 
         /* Clip (shouldn't happen for properly conditioned inputs) */
         rc_tmp_Q15 = silk_SAT16( rc_tmp_Q15 );
 
         /* Store */
         rc_Q15[ k ] = (opus_int16)rc_tmp_Q15;
 
         /* Update correlations */
         for( n = 0; n < order - k; n++ ) {
             Ctmp1 = C[ n + k + 1 ][ 0 ];
             Ctmp2 = C[ n ][ 1 ];
             C[ n + k + 1 ][ 0 ] = silk_SMLAWB( Ctmp1, silk_LSHIFT( Ctmp2, 1 ), rc_tmp_Q15 );
             C[ n ][ 1 ]         = silk_SMLAWB( Ctmp2, silk_LSHIFT( Ctmp1, 1 ), rc_tmp_Q15 );
         }
     }
 
+    for(; k < order; k++ ) {
+       rc_Q15[ k ] = 0;
+    }
+
     /* return residual energy */
-    return C[ 0 ][ 1 ];
+    return silk_max_32( 1, C[ 0 ][ 1 ] );
 }