diff --git a/Makefile b/Makefile
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,7 @@
 # Paths
 SRC_ENC   = lib_enc lib_com
 SRC_DEC   = lib_dec lib_com
+SRC_LIB   = lib_dec lib_enc lib_com
 BUILD     = build
 
 SRC_DIRS  = $(sort -u $(SRC_ENC) $(SRC_DEC)) 
@@ -10,6 +11,7 @@ SRC_DIRS  = $(sort -u $(SRC_ENC) $(SRC_DEC))
 # Name of CLI binaries
 CLI_ENC   = EVS_cod
 CLI_DEC   = EVS_dec
+LIB_SO    = lib3gpp-evs.so
 
 # Default tool settings
 CC        = gcc
@@ -62,13 +64,17 @@ CFLAGS   += $(foreach DIR,$(SRC_DIRS),-I$(DIR))
 # Source file search paths
 VPATH     = $(SRC_DIRS)
 
+CFLAGS   += -fPIC
+
 ###############################################################################
 
 SRCS_ENC  = $(foreach DIR,$(SRC_ENC),$(patsubst $(DIR)/%,%,$(wildcard $(DIR)/*.c)))
 SRCS_DEC  = $(foreach DIR,$(SRC_DEC),$(patsubst $(DIR)/%,%,$(wildcard $(DIR)/*.c)))
+SRCS_LIB  = $(filter-out encoder.c decoder.c voip_client.c,$(foreach DIR,$(SRC_LIB),$(patsubst $(DIR)/%,%,$(wildcard $(DIR)/*.c))))
 
 OBJS_ENC  = $(addprefix $(BUILD)/,$(SRCS_ENC:.c=.o))
 OBJS_DEC  = $(addprefix $(BUILD)/,$(SRCS_DEC:.c=.o))
+OBJS_LIB  = $(addprefix $(BUILD)/,$(SRCS_LIB:.c=.o))
 
 DEPS      = $(addprefix $(BUILD)/,$(SRCS_ENC:.c=.P) $(SRCS_DEC:.c=.P))
 
@@ -76,7 +82,7 @@ DEPS      = $(addprefix $(BUILD)/,$(SRCS_ENC:.c=.P) $(SRCS_DEC:.c=.P))
 
 .PHONY: all clean clean_all
 
-all: $(CLI_ENC) $(CLI_DEC)
+all: $(CLI_ENC) $(CLI_DEC) $(LIB_SO)
 
 $(BUILD):
 	$(QUIET)mkdir -p $(BUILD)
@@ -87,6 +93,9 @@ $(CLI_ENC): $(OBJS_ENC)
 $(CLI_DEC): $(OBJS_DEC)
 	$(QUIET_LINK)$(CC) $(LDFLAGS) $(OBJS_DEC) -lm -o $(CLI_DEC)
 
+$(LIB_SO): $(OBJS_LIB)
+	$(QUIET_LINK)$(CC) $(LDFLAGS) $(OBJS_LIB) -lm -shared -o $(LIB_SO)
+
 clean:
 	$(QUIET)$(RM) $(OBJS_ENC) $(OBJS_DEC) $(DEPS)
 	$(QUIET)$(RM) $(DEPS:.P=.d)
diff --git a/lib_com/prot.h b/lib_com/prot.h
--- a/lib_com/prot.h
+++ b/lib_com/prot.h
@@ -624,6 +624,11 @@ short lsp_convert_poly(
     const short L_frame,                    /* i  : flag for up or down conversion */
     const short Opt_AMRWB                   /* i  : flag for the AMR-WB IO mode    */
 );
+unsigned long encoder_size(void);
+unsigned long encoder_ind_list_size(void);
+void encoder_set_opts(Encoder_State *st, unsigned long Fs, void *ind_list);
+void encoder_set_brate(Encoder_State *st, unsigned long brate, unsigned int bwidth,
+		unsigned int mode, unsigned int amr);
 
 short findpulse(                            /* o  : pulse position        */
     const short L_frame,                    /* i  : length of the frame   */
@@ -651,6 +656,9 @@ void preemph(
     const short L,                          /* i  : vector size        */
     float *mem                        /* i/o: memory (x[-1])     */
 );
+unsigned long decoder_size(void);
+void decoder_set_Fs(Decoder_State *st, unsigned long Fs);
+void decoder_inc_ini_frame(Decoder_State *st);
 
 void cb_shape(
     const short preemphFlag,                /* i  : flag for pre-emphasis                       */
diff --git a/lib_dec/init_dec.c b/lib_dec/init_dec.c
--- a/lib_dec/init_dec.c
+++ b/lib_dec/init_dec.c
@@ -653,3 +653,16 @@ void destroy_decoder(
 
     return;
 }
+
+
+
+unsigned long decoder_size(void) {
+	return sizeof(Decoder_State);
+}
+void decoder_set_Fs(Decoder_State *st, unsigned long Fs) {
+	st->output_Fs = Fs;
+}
+void decoder_inc_ini_frame(Decoder_State *st) {
+	if (st->ini_frame < MAX_FRAME_COUNTER)
+		st->ini_frame++;
+}
diff --git a/lib_enc/init_enc.c b/lib_enc/init_enc.c
--- a/lib_enc/init_enc.c
+++ b/lib_enc/init_enc.c
@@ -729,3 +729,31 @@ void destroy_encoder(
 
     return;
 }
+
+
+
+unsigned long encoder_size(void) {
+	return sizeof(Encoder_State);
+}
+void encoder_set_opts(Encoder_State *st, unsigned long Fs, void *ind_list) {
+	st->input_Fs = Fs;
+	st->ind_list = ind_list;
+	st->rf_fec_indicator = 1;
+	st->last_codec_mode = st->codec_mode;
+}
+void encoder_set_brate(Encoder_State *st, unsigned long brate, unsigned int bwidth,
+		unsigned int mode, unsigned int amr) {
+	if (brate == 5900) {
+		st->Opt_SC_VBR = 1;
+		brate = 7200;
+	}
+	else
+		st->Opt_SC_VBR = 0;
+	st->total_brate = brate;
+	st->codec_mode = mode;
+	st->Opt_AMR_WB = amr;
+	st->max_bwidth = bwidth;
+}
+unsigned long encoder_ind_list_size(void) {
+	return sizeof(Indice) * MAX_NUM_INDICES;
+}