[Opus] Update to v1.2.1

third_party/opus/src/silk/tuning_parameters.h

Index: third_party/opus/src/silk/tuning_parameters.h
diff --git a/third_party/opus/src/silk/tuning_parameters.h b/third_party/opus/src/silk/tuning_parameters.h
index 5b8f404235f491d9b4bedaa48f3942307e7d12a1..d70275fd8f5dd15e3c68bd28d3215b40c49bbe54 100644
--- a/third_party/opus/src/silk/tuning_parameters.h
+++ b/third_party/opus/src/silk/tuning_parameters.h
@@ -53,19 +53,12 @@ extern "C"
 /* 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 */
 /***********************/
@@ -103,25 +96,16 @@ extern "C"
 #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