[Opus] Update to v1.2.1

third_party/opus/src/silk/PLC.c

 /***********************************************************************
 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 - Redistributions of source code must retain the above copyright notice,
 this list of conditions and the following disclaimer.
 - Redistributions in binary form must reproduce the above copyright
 notice, this list of conditions and the following disclaimer in the
 documentation and/or other materials provided with the distribution.
@@ skipping 257 matching lines @@
         if( psDec->prevSignalType == TYPE_VOICED ) {
             for( i = 0; i < LTP_ORDER; i++ ) {
                 rand_scale_Q14 -= B_Q14[ i ];
             }
             rand_scale_Q14 = silk_max_16( 3277, rand_scale_Q14 ); /* 0.2 */
             rand_scale_Q14 = (opus_int16)silk_RSHIFT( silk_SMULBB( rand_scale_Q14, psPLC->prevLTP_scale_Q14 ), 14 );
         } else {
             /* Reduce random noise for unvoiced frames with high LPC gain */
             opus_int32 invGain_Q30, down_scale_Q30;
 
-            invGain_Q30 = silk_LPC_inverse_pred_gain( psPLC->prevLPC_Q12, psDec->LPC_order );
+            invGain_Q30 = silk_LPC_inverse_pred_gain( psPLC->prevLPC_Q12, psDec->LPC_order, arch );
 
             down_scale_Q30 = silk_min_32( silk_RSHIFT( (opus_int32)1 << 30, LOG2_INV_LPC_GAIN_HIGH_THRES ), invGain_Q30 );
             down_scale_Q30 = silk_max_32( silk_RSHIFT( (opus_int32)1 << 30, LOG2_INV_LPC_GAIN_LOW_THRES ), down_scale_Q30 );
             down_scale_Q30 = silk_LSHIFT( down_scale_Q30, LOG2_INV_LPC_GAIN_HIGH_THRES );
 
             rand_Gain_Q15 = silk_RSHIFT( silk_SMULWB( down_scale_Q30, rand_Gain_Q15 ), 14 );
         }
     }
 
     rand_seed    = psPLC->rand_seed;
@@ skipping 32 matching lines @@
             rand_seed = silk_RAND( rand_seed );
             idx = silk_RSHIFT( rand_seed, 25 ) & RAND_BUF_MASK;
             sLTP_Q14[ sLTP_buf_idx ] = silk_LSHIFT32( silk_SMLAWB( LTP_pred_Q12, rand_ptr[ idx ], rand_scale_Q14 ), 2 );
             sLTP_buf_idx++;
         }
 
         /* Gradually reduce LTP gain */
         for( j = 0; j < LTP_ORDER; j++ ) {
             B_Q14[ j ] = silk_RSHIFT( silk_SMULBB( harm_Gain_Q15, B_Q14[ j ] ), 15 );
         }
-        /* Gradually reduce excitation gain */
-        rand_scale_Q14 = silk_RSHIFT( silk_SMULBB( rand_scale_Q14, rand_Gain_Q15 ), 15 );
+        if ( psDec->indices.signalType != TYPE_NO_VOICE_ACTIVITY ) {
+            /* Gradually reduce excitation gain */
+            rand_scale_Q14 = silk_RSHIFT( silk_SMULBB( rand_scale_Q14, rand_Gain_Q15 ), 15 );
+        }
 
         /* Slowly increase pitch lag */
         psPLC->pitchL_Q8 = silk_SMLAWB( psPLC->pitchL_Q8, psPLC->pitchL_Q8, PITCH_DRIFT_FAC_Q16 );
         psPLC->pitchL_Q8 = silk_min_32( psPLC->pitchL_Q8, silk_LSHIFT( silk_SMULBB( MAX_PITCH_LAG_MS, psDec->fs_kHz ), 8 ) );
         lag = silk_RSHIFT_ROUND( psPLC->pitchL_Q8, 8 );
     }
 
     /***************************/
     /* LPC synthesis filtering */
     /***************************/
@@ skipping 94 matching lines @@
                     gain_Q16 += slope_Q16;
                     if( gain_Q16 > (opus_int32)1 << 16 ) {
                         break;
                     }
                 }
             }
         }
         psPLC->last_frame_lost = 0;
     }
 }