view src/cs/layer1/gtt_include/l1gtt_baudot_functions.h @ 205:81f5c4ca1fb3

mmiDialogs.c: make dialog_info() static The function in question was first declared as static, then defined as non-static, which should be considered invalid C. Given that this function is not referenced from any other modules and appears to have been intended as static, make it so.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 06 Apr 2021 01:28:52 +0000
parents 4e78acac3d88
children
line wrap: on
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/*****************************************************************************/
/*                                                                           */
/* ========================================================================= */
/*                                                                           */
/* Copyright (c) 2002                                                        */
/* Matsushita Communication Industrial, MMCD USA                             */
/*                                                                           */
/* ========================================================================= */
/*                                                                           */
/* File Name:                                                                */
/*     l1gtt_baudot_functions.h                                              */
/*                                                                           */
/* Purpose:                                                                  */
/*     This is the header file for "l1gtt_baudot_functions.c".               */
/*                                                                           */
/*                                                                           */
/* Warnings:                                                                 */
/*                                                                           */
/*                                                                           */
/*****************************************************************************/

/*** Maintenance *********************************************************/
/*                                                                       */
/*                                                                       */
/*                 02/11/2002   initial version created       Laura Ning */
/*                                                                       */
/*************************************************************************/
#ifndef _BAUDOT_DECODE_H_
#define BAUDOT_DECODE_H

#include "ctm_typedefs.h"

/*
*******************************************************************************
*                         DEFINITIONS
*******************************************************************************
*/

/* definitions (might be of global interest) */
#define BAUDOT_NUM_INFO_BITS    5 /* number of info bits per TTY character  */
#define BAUDOT_SHIFT_FIGURES   27 /* code of shift to figures symbol        */
#define BAUDOT_SHIFT_LETTERS   31 /* code of shift to letters symbol        */

#define BAUDOT_LOGICAL_1  1
#define BAUDOT_LOGICAL_0  -1
#define BAUDOT_NON_TTY   0
#define BAUDOT_START_BIT  -1
#define BAUDOT_STOP_BIT   1

#define BAUDOT_STOP_OUTPUT  2 /* STOP bit as the output of baudot_encode() to DSP */

/* definations (be only of local interest)   */

#define START_OF_STOP_BIT  26

#define DETECT_WINDOW_WIDTH  4   /* A sliding window is used to detect start,stop and data bits */
#define BAUDOT_SAMPLE_DURATION 3   /* The duration to meet to determine a valid baudot bit        */

/* A temporary assumption of the input buffer size, to be    */
/* replaced later when TI has the actual buffer size defined */
#define MAX_WORDS_OF_BUFFER1      40  /* Number of the 5ms-bits it can contain  */
#define TIME_INTERVAL_OF_BUFFER1  200 /* in the unit of ms                      */
#define MAX_WORDS_ONE_TTYCODE   36  /* Number of 5ms-bits a TTY character has */

#define NUM_STOP_BITS_TX        2    /* number of stop bits per character    */

/* ******************************************************************/
/* Type definitions for variables that contain all states of the    */
/* Baudot decoder                                                   */
/* ******************************************************************/


typedef struct 
{
  WORD16    remainedSampleVec[MAX_WORDS_ONE_TTYCODE]; /* hold the samples for last unfinished detection */
  UWORD16   remainedSampleLen;  /* length of the remaining samples for last unfinished detection */
  WORD16    ttyCode;
  UWORD16   cntBitsActualChar;
  UWORD16   samplesRemained;  /* number of samples left from last detection      */
  BOOL        startBitDetected;
  BOOL        inFigureMode;

} baudot_decode_state_t;

/* ******************************************************************/
/* Type definitions for variables that contain all states of the    */
/* Baudot encoder                                                   */
/* ******************************************************************/
typedef struct 
{
  WORD16       cntCharsSinceLastShift;
  BOOL           inFigureMode;
  BOOL           tailBitsGenerated;
//  fifo_state_t   fifo_state;
} baudot_encode_state_t;

/****************************************************************************/
/* convertChar2ttyCode()                                                    */
/* *********************                                                    */
/* Conversion from character into tty code                                  */
/*                                                                          */
/* input variables:                                                         */
/* - inChar       charcater that shall be converted                         */
/*                                                                          */
/* return value:  baudot code of the input character                        */
/*                or -1 in case that inChar is not valid (e.g. inChar=='\0')*/
/*                                                                          */
/* Matthias Doerbecker, Ericsson Eurolab Deutschland (EED/N/RV), 2000/02/17 */
/****************************************************************************/

WORD16 convertChar2ttyCode(char inChar);



/****************************************************************************/
/* convertTTYcode2char()                                                    */
/* *********************                                                    */
/* Conversion from tty code into character                                  */
/*                                                                          */
/* input variables:                                                         */
/* - ttyCode      Baudot code (must be within the range 0...63)             */
/*                or -1 if there is nothing to convert                      */
/*                                                                          */
/* return value:  character (or '\0' if ttyCode is not valid)               */
/*                                                                          */
/* Matthias Doerbecker, Ericsson Eurolab Deutschland (EED/N/RV), 2000/02/17 */
/****************************************************************************/

char convertTTYcode2char(WORD16 ttyCode);

/* prototype declarations */
void init_baudot_decode(baudot_decode_state_t* state);

void init_baudot_encode(baudot_encode_state_t* state);

void reset_baudot_decode(baudot_decode_state_t* state);

void baudot_decode(WORD16* sampleVec, WORD16 numSamples,
                      fifo_state_t* ptrOutFifoState,
                      baudot_decode_state_t* state);
void baudot_encode(WORD16 inputTTYcode,
       fifo_state_t* ptrOutFifoState,
       baudot_encode_state_t* state);
  
#endif