[Opus] Update to v1.2.1

third_party/opus/src/silk/tuning_parameters.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 35 matching lines @@
 /* Bandwidth expansion for whitening filter in pitch analysis */
 #define FIND_PITCH_BANDWIDTH_EXPANSION                  0.99f
 
 /*********************/
 /* Linear prediction */
 /*********************/
 
 /* LPC analysis regularization */
 #define FIND_LPC_COND_FAC                               1e-5f
 
-/* LTP analysis defines */
-#define FIND_LTP_COND_FAC                               1e-5f
-#define LTP_DAMPING                                     0.05f
-#define LTP_SMOOTHING                                   0.1f
-
-/* LTP quantization settings */
-#define MU_LTP_QUANT_NB                                 0.03f
-#define MU_LTP_QUANT_MB                                 0.025f
-#define MU_LTP_QUANT_WB                                 0.02f
-
 /* Max cumulative LTP gain */
 #define MAX_SUM_LOG_GAIN_DB                             250.0f
 
+/* LTP analysis defines */
+#define LTP_CORR_INV_MAX                                0.03f
+
 /***********************/
 /* High pass filtering */
 /***********************/
 
 /* Smoothing parameters for low end of pitch frequency range estimation */
 #define VARIABLE_HP_SMTH_COEF1                          0.1f
 #define VARIABLE_HP_SMTH_COEF2                          0.015f
 #define VARIABLE_HP_MAX_DELTA_FREQ                      0.4f
 
 /* Min and max cut-off frequency values (-3 dB points) */
@@ skipping 17 matching lines @@
 /* reduction in coding SNR during low speech activity */
 #define BG_SNR_DECR_dB                                  2.0f
 
 /* factor for reducing quantization noise during voiced speech */
 #define HARM_SNR_INCR_dB                                2.0f
 
 /* factor for reducing quantization noise for unvoiced sparse signals */
 #define SPARSE_SNR_INCR_dB                              2.0f
 
 /* threshold for sparseness measure above which to use lower quantization offset during unvoiced */
-#define SPARSENESS_THRESHOLD_QNT_OFFSET                 0.75f
+#define ENERGY_VARIATION_THRESHOLD_QNT_OFFSET           0.6f
 
 /* warping control */
 #define WARPING_MULTIPLIER                              0.015f
 
 /* fraction added to first autocorrelation value */
-#define SHAPE_WHITE_NOISE_FRACTION                      5e-5f
+#define SHAPE_WHITE_NOISE_FRACTION                      3e-5f
 
 /* noise shaping filter chirp factor */
-#define BANDWIDTH_EXPANSION                             0.95f
-
-/* difference between chirp factors for analysis and synthesis noise shaping filters at low bitrates */
-#define LOW_RATE_BANDWIDTH_EXPANSION_DELTA              0.01f
-
-/* extra harmonic boosting (signal shaping) at low bitrates */
-#define LOW_RATE_HARMONIC_BOOST                         0.1f
-
-/* extra harmonic boosting (signal shaping) for noisy input signals */
-#define LOW_INPUT_QUALITY_HARMONIC_BOOST                0.1f
+#define BANDWIDTH_EXPANSION                             0.94f
 
 /* harmonic noise shaping */
 #define HARMONIC_SHAPING                                0.3f
 
 /* extra harmonic noise shaping for high bitrates or noisy input */
 #define HIGH_RATE_OR_LOW_QUALITY_HARMONIC_SHAPING       0.2f
 
 /* parameter for shaping noise towards higher frequencies */
 #define HP_NOISE_COEF                                   0.25f
 
@@ skipping 27 matching lines @@
 #define REDUCE_BITRATE_10_MS_BPS                        2200
 
 /* Maximum time before allowing a bandwidth transition */
 #define MAX_BANDWIDTH_SWITCH_DELAY_MS                   5000
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif /* SILK_TUNING_PARAMETERS_H */