--- a/libgsmhr1/Makefile	Thu Dec 04 04:05:16 2025 +0000
+++ b/libgsmhr1/Makefile	Thu Dec 04 06:25:54 2025 +0000
@@ -1,8 +1,8 @@
-OBJS=	dec_func.o dhf_packed.o dhf_params.o dtx_rxfe.o enc_out_order.o \
-	mathdp31.o mathhalf.o pack_frame.o paramval_cod.o paramval_common.o \
-	paramval_dec.o rtp_in.o rtp_in_direct.o rxfe.o rxfe_create.o \
-	sid_cw_params.o sid_detect.o sid_reset.o sp_rom.o tfo.o twts002_in.o \
-	twts002_out.o unpack_frame.o
+OBJS=	dec_func.o dec_state.o dhf_packed.o dhf_params.o dtx_rxfe.o \
+	enc_out_order.o mathdp31.o mathhalf.o pack_frame.o paramval_cod.o \
+	paramval_common.o paramval_dec.o rtp_in.o rtp_in_direct.o rxfe.o \
+	rxfe_create.o sid_cw_params.o sid_detect.o sid_reset.o sp_rom.o tfo.o \
+	twts002_in.o twts002_out.o unpack_frame.o
 HDRS=	dec_func.h dec_state.h dtx_const.h dtx_rxfe.h enc_out_order.h \
 	mathdp31.h mathhalf.h namespace.h rxfe.h sp_rom.h tw_gsmhr.h typedefs.h
 LIB=	libgsmhr1.a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgsmhr1/dec_state.c	Thu Dec 04 06:25:54 2025 +0000
@@ -0,0 +1,37 @@
+/*
+ * Here we implement gsmhr_decoder_create() and gsmhr_decoder_reset()
+ * functions: allocation and initialization of full speech decoder state.
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include "tw_gsmhr.h"
+#include "typedefs.h"
+#include "namespace.h"
+#include "dec_state.h"
+#include "dtx_const.h"
+
+struct gsmhr_decoder_state *gsmhr_decoder_create(void)
+{
+	struct gsmhr_decoder_state *st;
+
+	st = malloc(sizeof(struct gsmhr_decoder_state));
+	if (st)
+		gsmhr_decoder_reset(st);
+	return st;
+}
+
+void gsmhr_decoder_reset(struct gsmhr_decoder_state *st)
+{
+	int i;
+
+	memset(st, 0, sizeof(struct gsmhr_decoder_state));
+	gsmhr_rxfe_reset(&st->rxfe);
+	for (i = 0; i < 4; i++) {
+		st->plSubfrEnergyMem[i] = 80;
+		st->swLevelMem[i] = -72;
+	}
+	st->swRxDTXState = CNINTPER - 1;
+	st->is_homed = 1;
+}

--- a/libgsmhr1/dec_state.h	Thu Dec 04 04:05:16 2025 +0000
+++ b/libgsmhr1/dec_state.h	Thu Dec 04 06:25:54 2025 +0000
@@ -11,9 +11,29 @@
 #include "typedefs.h"
 #include "rxfe.h"
 
+#define  LTP_LEN      147              /* 147==0x93 length of LTP history */
+
 struct gsmhr_decoder_state {
 	struct gsmhr_rxfe_state rxfe;
 	int is_homed;
+	/* state variables from err_conc.c */
+	Longword plSubfrEnergyMem[4];
+	Shortword swLevelMem[4];
+	/* state variables from sp_dec.c */
+	Shortword gswPostFiltAgcGain;
+	Shortword gpswPostFiltStateNum[NP];
+	Shortword gpswPostFiltStateDenom[NP];
+	Shortword swPostEmphasisState;
+	Shortword pswSynthFiltState[NP];
+	Shortword pswOldFrmKsDec[NP];
+	Shortword pswOldFrmAsDec[NP];
+	Shortword pswOldFrmPFNum[NP];
+	Shortword pswOldFrmPFDenom[NP];
+	Shortword swOldR0Dec;
+	Shortword pswLtpStateBaseDec[LTP_LEN + S_LEN];
+	Shortword pswPPreState[LTP_LEN + S_LEN];
+	Shortword swMuteFlagOld;
+	Shortword swRxDTXState;
 };
 
 #endif