[Opus] Update to v1.2.1

third_party/opus/src/silk/PLC.c

Index: third_party/opus/src/silk/PLC.c
diff --git a/third_party/opus/src/silk/PLC.c b/third_party/opus/src/silk/PLC.c
index fb6ea887b7ee254b1b858a6a52bc5845e0d5738d..a3e55ea765ef4f4b071901555d33d03c0633eae2 100644
--- a/third_party/opus/src/silk/PLC.c
+++ b/third_party/opus/src/silk/PLC.c
@@ -275,7 +275,7 @@ static OPUS_INLINE void silk_PLC_conceal(
             /* 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 );
@@ -328,8 +328,10 @@ static OPUS_INLINE void silk_PLC_conceal(
         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 );