--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libtwamr/cnst.h	Fri Apr 05 01:02:23 2024 +0000
@@ -0,0 +1,58 @@
+/*
+*****************************************************************************
+*
+*      GSM AMR-NB speech codec   R98   Version 7.6.0   December 12, 2001
+*                                R99   Version 3.3.0                
+*                                REL-4 Version 4.1.0                
+*
+*****************************************************************************
+*
+*      File             : cnst.h
+*      Purpose          : Speech codec constant parameters
+*                       :  (encoder, decoder, and postfilter)
+*
+*****************************************************************************
+*/
+#ifndef cnst_h
+#define cnst_h "$Id $"
+
+#define L_TOTAL      320       /* Total size of speech buffer.             */
+#define L_WINDOW     240       /* Window size in LP analysis               */
+#define L_FRAME      160       /* Frame size                               */
+#define L_FRAME_BY2  80        /* Frame size divided by 2                  */
+#define L_SUBFR      40        /* Subframe size                            */
+#define L_CODE       40        /* codevector length                        */
+#define NB_TRACK     5         /* number of tracks                         */
+#define STEP         5         /* codebook step size                       */
+#define NB_TRACK_MR102  4      /* number of tracks mode mr102              */
+#define STEP_MR102      4      /* codebook step size mode mr102            */
+#define M            10        /* Order of LP filter                       */
+#define MP1          (M+1)     /* Order of LP filter + 1                   */
+#define LSF_GAP      205       /* Minimum distance between LSF after quan-
+                                  tization; 50 Hz = 205                    */
+#define LSP_PRED_FAC_MR122 21299 /* MR122 LSP prediction factor (0.65 Q15) */
+#define AZ_SIZE       (4*M+4)  /* Size of array of LP filters in 4 subfr.s */
+#define PIT_MIN_MR122 18       /* Minimum pitch lag (MR122 mode)           */
+#define PIT_MIN       20       /* Minimum pitch lag (all other modes)      */
+#define PIT_MAX       143      /* Maximum pitch lag                        */
+#define L_INTERPOL    (10+1)   /* Length of filter for interpolation       */
+#define L_INTER_SRCH  4        /* Length of filter for CL LTP search
+                                  interpolation                            */
+        
+#define MU       26214         /* Factor for tilt compensation filter 0.8  */
+#define AGC_FAC  29491         /* Factor for automatic gain control 0.9    */
+        
+#define L_NEXT       40        /* Overhead in LP analysis                  */
+#define SHARPMAX  13017        /* Maximum value of pitch sharpening        */
+#define SHARPMIN  0            /* Minimum value of pitch sharpening        */
+                                                                          
+                                                                          
+#define MAX_PRM_SIZE    57     /* max. num. of params                      */
+#define MAX_SERIAL_SIZE 244    /* max. num. of serial bits                 */
+                                                                          
+#define GP_CLIP   15565        /* Pitch gain clipping = 0.95               */
+#define N_FRAME   7            /* old pitch gains in average calculation   */
+
+#define EHF_MASK 0x0008        /* encoder homing frame pattern             */
+
+#endif