--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cs/layer1/gtt_include/ctm/ctm_receiver.h	Fri May 15 01:28:16 2020 +0000
@@ -0,0 +1,158 @@
+/*
+*******************************************************************************
+*
+*      COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH
+*      90411 NUERNBERG, GERMANY, Tel Int + 49 911 5217 100
+*
+*      The program(s) may be used and/or copied only with the
+*      written permission from Ericsson or in accordance
+*      with the terms and conditions stipulated in the agreement or
+*      contract under which the program(s) have been supplied.
+*
+*******************************************************************************
+*
+*      File             : ctm_receiver.h
+*      Author           : EEDN/RV Matthias Doerbecker
+*      Tested Platforms : Sun Solaris, Windows NT 4.0
+*      Description      : header file for ctm_receiver.c
+*
+*      Changes since October 13, 2000:
+*      - added reset function reset_ctm_receiver()
+*
+*      $Log: $
+*
+*******************************************************************************
+*/
+#ifndef ctm_receiver_h
+#define ctm_receiver_h "$Id: $"
+
+/*
+*******************************************************************************
+*                         INCLUDE FILES
+*******************************************************************************
+*/
+
+#include "init_interleaver.h"
+//#include "tonedemod.h"
+#include "wait_for_sync.h"
+#include "conv_poly.h"
+#include "viterbi.h"
+#include "ctm_typedefs.h"
+#include "fifo.h"
+
+#include <stdlib.h>
+#include <stdio.h> 
+
+
+/* ******************************************************************/
+/* Type definitions for variables that contain all states of the    */
+/* Cellular Text Telephone Modem (CTM) Transmitter and Receiver,    */
+/* respectively.                                                    */
+/* ******************************************************************/
+
+typedef struct {
+  /* simple variables */
+  WORD16    samplingCorrection;
+  WORD16    numBitsWithLowReliability;
+  WORD16    cntIdleSymbols;
+  WORD16    numDeintlBits;
+  WORD16    cntRXBits;
+  WORD16    syncCorrect;
+  WORD16    cntUnreliableGrossBits;
+  WORD16    intl_delay;
+  
+  /* structs (state types) */
+  fifo_state_t          rx_bits_fifo_state;
+  fifo_state_t          octet_fifo_state;
+  fifo_state_t          net_bits_fifo_state;
+  //demod_state_t         tonedemod_state;
+  // interleaver_state_t   intl_state;
+  interleaver_state_t   deintl_state;
+  wait_for_sync_state_t wait_state;
+  viterbi_t             viterbi_state;
+   
+  /* vectors (not to be allocated) */
+#if (NUM_MUTE_ROWS>0)
+  WORD16    mutePositions[intlvB*NUM_MUTE_ROWS];
+#else
+  WORD16    mutePositions[1];
+#endif
+
+  /* vectors (to be allocated in init_ctm_receiver()) */
+  WORD16    *waitSyncOut;
+  WORD16    *deintlOut;
+
+} rx_state_t;
+
+
+
+
+/***********************************************************************/
+/* init_ctm_receiver()                                                 */
+/* *******************                                                 */
+/* Initialization of the CTM Receiver.                                 */
+/*                                                                     */
+/* output vaiables:                                                    */
+/* rx_state :   pointer to a variable of rx_state_t containing the     */
+/*              initialized states of the receiver                     */
+/***********************************************************************/
+
+void init_ctm_receiver(rx_state_t* rx_state);
+
+/*
+ ***********************************************************************
+ * Shutdown_ctm_receiver()                                             *
+ * ***********************                                             *
+ * Shutdown of the CTM Receiver.                                       *
+ *                                                                     *
+ * Input variables:                                                    *
+ * rx_state :   pointer to a variable of rx_state_t containing the     *
+ *              initialized states of the receiver                     *
+ ***********************************************************************
+*/
+void Shutdown_ctm_receiver(rx_state_t* rx_state);
+
+/*
+ ***********************************************************************
+ * reset_ctm_receiver()                                                *
+ * ********************                                                *
+ * Reset of the Cellular Text Telephone Modem receiver, state          *
+ * machines and buffer pointers.                                       *
+ *                                                                     *
+ * Input variables:                                                    *
+ * rx_state :   pointer to a variable of rx_state_t containing the     *
+ *              initialized states of the receiver                     *
+ ***********************************************************************
+*/
+void reset_ctm_receiver(rx_state_t* rx_state);
+
+
+/***************************************************************************/
+/* ctm_receiver()                                                          */
+/* **************                                                          */
+/* Runs the Cellular Text Telephone Modem Receiver for a block of          */
+/* (nominally) 160 samples. Due to the internal synchronization, the       */
+/* number of processed samples might vary between 156 and 164 samples.     */
+/* The input of the samples and the output of the decoded characters       */
+/* is handled via fifo buffers, which have to be initialized               */
+/* externally before using this function (see fifo.h for details).         */
+/*                                                                         */
+/* input/output variables:                                                 */
+/* *ptr_signal_fifo_state      fifo state for the input samples            */
+/* *ptr_output_char_fifo_state fifo state for the output characters        */
+/* *ptr_early_muting_required  returns whether the original audio signal   */
+/*                             must not be forwarded. This is to guarantee */
+/*                             that the preamble or resync sequence is     */
+/*                             detected only by the first CTM device, if   */
+/*                             several CTM devices are cascaded            */
+/*                             subsequently.                               */
+/* *rx_state                   pointer to the variable containing the      */
+/*                             receiver states                             */
+/***************************************************************************/
+
+void ctm_receiver(fifo_state_t*  ptr_signal_fifo_state,
+                  fifo_state_t*  ptr_output_char_fifo_state,
+                  BOOL*          ptr_early_muting_required,
+                  rx_state_t*    rx_state);
+
+#endif