--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libtwamr/gain_q.h	Mon May 06 04:38:55 2024 +0000
@@ -0,0 +1,80 @@
+/*
+********************************************************************************
+*
+*      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             : gainQuant.h
+*      Purpose          : Quantazation of gains
+*
+********************************************************************************
+*/
+#ifndef gain_q_h
+#define gain_q_h "$Id $"
+ 
+/*
+********************************************************************************
+*                         INCLUDE FILES
+********************************************************************************
+*/
+#include "tw_amr.h"
+#include "typedef.h"
+#include "gc_pred.h"
+#include "g_adapt.h"
+
+/*
+********************************************************************************
+*                         DEFINITION OF DATA TYPES
+********************************************************************************
+*/
+typedef struct {
+    Word16 sf0_exp_gcode0;
+    Word16 sf0_frac_gcode0;
+    Word16 sf0_exp_target_en;
+    Word16 sf0_frac_target_en;
+    Word16 sf0_exp_coeff[5];
+    Word16 sf0_frac_coeff[5];
+    Word16 *gain_idx_ptr;
+    gc_predState     gc_predSt;
+    gc_predState     gc_predUnqSt;
+    GainAdaptState   adaptSt;
+} gainQuantState;
+ 
+/*
+********************************************************************************
+*                         DECLARATION OF PROTOTYPES
+********************************************************************************
+*/
+void gainQuant_reset (gainQuantState *st);
+/* reset of pre processing state (i.e. set state memory to zero)
+   returns 0 on success
+ */
+
+int gainQuant(
+    gainQuantState *st,   /* i/o : State struct                      */
+    enum Mode mode,       /* i   : coder mode                        */
+    Word16 res[],         /* i   : LP residual,                 Q0   */
+    Word16 exc[],         /* i   : LTP excitation (unfiltered), Q0   */
+    Word16 code[],        /* i   : CB innovation (unfiltered),  Q13  */
+                          /*       (unsharpened for MR475)           */
+    Word16 xn[],          /* i   : Target vector.                    */
+    Word16 xn2[],         /* i   : Target vector.                    */
+    Word16 y1[],          /* i   : Adaptive codebook.                */
+    Word16 Y2[],          /* i   : Filtered innovative vector.       */
+    Word16 g_coeff[],     /* i   : Correlations <xn y1> <y1 y1>      */
+                          /*       Compute in G_pitch().             */
+    Word16 even_subframe, /* i   : even subframe indicator flag      */
+    Word16 gp_limit,      /* i   : pitch gain limit                  */
+    Word16 *sf0_gain_pit, /* o   : Pitch gain sf 0.   MR475          */
+    Word16 *sf0_gain_cod, /* o   : Code gain sf 0.    MR475          */
+    Word16 *gain_pit,     /* i/o : Pitch gain.                       */
+    Word16 *gain_cod,     /* o   : Code gain.                        */
+                          /*       MR475: gain_* unquantized in even */
+                          /*       subframes, quantized otherwise    */
+    Word16 **anap         /* o   : Index of quantization             */
+);
+
+#endif