fix a decoder bug in the first frame

Author: jonestorrons

JC1_SDK_SRC_ARM/src/libSATECodec/SKP_Silk_decode_frame.c

@@ -377,7 +377,10 @@ SKP_int SKP_Silk_decode_frame(
     /********************************************/
     SKP_assert( ( ( psDec->fs_kHz == 12 ) && ( L % 3 ) == 0 ) || 
                 ( ( psDec->fs_kHz != 12 ) && ( L % 2 ) == 0 ) );
-    SKP_Silk_biquad( pOut, psDec->HP_B, psDec->HP_A, psDec->HPState, pOut, L );
+    
+    if(psDec->nFramesDecoded>2){//HP begin after the second frame
+        SKP_Silk_biquad( pOut, psDec->HP_B, psDec->HP_A, psDec->HPState, pOut, L );
+    }
 
     /********************************************/
     /* set output frame length                    */

JC1_SDK_SRC_FLP/src/libSATECodec/SKP_Silk_decode_frame.c

@@ -346,7 +346,10 @@ SKP_int SKP_Silk_decode_frame(
     /********************************************/
     SKP_assert( ( ( psDec->fs_kHz == 12 ) && ( L % 3 ) == 0 ) || 
                 ( ( psDec->fs_kHz != 12 ) && ( L % 2 ) == 0 ) );
-    SKP_Silk_biquad( pOut, psDec->HP_B, psDec->HP_A, psDec->HPState, pOut, L );
+    
+    if(psDec->nFramesDecoded>2){//HP begin after the second frame
+        SKP_Silk_biquad( pOut, psDec->HP_B, psDec->HP_A, psDec->HPState, pOut, L );
+    }
 
     /********************************************/
     /* set output frame length                    */