[Opus] Update to v1.2.1

third_party/opus/src/silk/float/SigProc_FLP.h

 /***********************************************************************
 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 50 matching lines @@
     const silk_float    auto_corr[],        /* I    autocorrelation sequence (length order+1)                   */
     opus_int            order               /* I    order                                                       */
 );
 
 void silk_k2a_FLP(
     silk_float          *A,                 /* O     prediction coefficients [order]                            */
     const silk_float    *rc,                /* I     reflection coefficients [order]                            */
     opus_int32          order               /* I     prediction order                                           */
 );
 
-/* Solve the normal equations using the Levinson-Durbin recursion */
-silk_float silk_levinsondurbin_FLP(         /* O    prediction error energy                                     */
-    silk_float          A[],                /* O    prediction coefficients [order]                             */
-    const silk_float    corr[],             /* I    input auto-correlations [order + 1]                         */
-    const opus_int      order               /* I    prediction order                                            */
-);
-
 /* compute autocorrelation */
 void silk_autocorrelation_FLP(
     silk_float          *results,           /* O    result (length correlationCount)                            */
     const silk_float    *inputData,         /* I    input data to correlate                                     */
     opus_int            inputDataSize,      /* I    length of input                                             */
     opus_int            correlationCount    /* I    number of correlation taps to compute                       */
 );
 
 opus_int silk_pitch_analysis_core_FLP(      /* O    Voicing estimate: 0 voiced, 1 unvoiced                      */
     const silk_float    *frame,             /* I    Signal of length PE_FRAME_LENGTH_MS*Fs_kHz                  */
@@ skipping 107 matching lines @@
 static OPUS_INLINE silk_float silk_log2( double x )
 {
     return ( silk_float )( 3.32192809488736 * log10( x ) );
 }
 
 #ifdef  __cplusplus
 }
 #endif
 
 #endif /* SILK_SIGPROC_FLP_H */