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-rw-r--r--main/tdd.c328
1 files changed, 0 insertions, 328 deletions
diff --git a/main/tdd.c b/main/tdd.c
deleted file mode 100644
index f1d7cf471..000000000
--- a/main/tdd.c
+++ /dev/null
@@ -1,328 +0,0 @@
-/*
- * Asterisk -- An open source telephony toolkit.
- *
- * Copyright (C) 1999 - 2005, Digium, Inc.
- *
- * Mark Spencer <markster@digium.com>
- *
- * Includes code and algorithms from the Zapata library.
- *
- * See http://www.asterisk.org for more information about
- * the Asterisk project. Please do not directly contact
- * any of the maintainers of this project for assistance;
- * the project provides a web site, mailing lists and IRC
- * channels for your use.
- *
- * This program is free software, distributed under the terms of
- * the GNU General Public License Version 2. See the LICENSE file
- * at the top of the source tree.
- */
-
-/*! \file
- *
- * \brief TTY/TDD Generation support
- *
- * \author Mark Spencer <markster@digium.com>
- *
- * \note Includes code and algorithms from the Zapata library.
- */
-
-#include "asterisk.h"
-
-ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
-
-#include <time.h>
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <math.h>
-#include <ctype.h>
-
-#include "asterisk/ulaw.h"
-#include "asterisk/tdd.h"
-#include "asterisk/logger.h"
-#include "asterisk/fskmodem.h"
-#include "ecdisa.h"
-
-struct tdd_state {
- fsk_data fskd;
- char rawdata[256];
- short oldstuff[4096];
- int oldlen;
- int pos;
- int modo;
- int mode;
- int charnum;
-};
-
-static float dr[4], di[4];
-static float tddsb = 176.0; /* 45.5 baud */
-
-#define TDD_SPACE 1800.0 /* 1800 hz for "0" */
-#define TDD_MARK 1400.0 /* 1400 hz for "1" */
-
-static int tdd_decode_baudot(struct tdd_state *tdd,unsigned char data) /* covert baudot into ASCII */
-{
- static char ltrs[32] = { '<','E','\n','A',' ','S','I','U',
- '\n','D','R','J','N','F','C','K',
- 'T','Z','L','W','H','Y','P','Q',
- 'O','B','G','^','M','X','V','^' };
- static char figs[32] = { '<','3','\n','-',' ','\'','8','7',
- '\n','$','4','\'',',','!',':','(',
- '5','\"',')','2','=','6','0','1',
- '9','?','+','^','.','/',';','^' };
- int d = 0; /* return 0 if not decodeable */
- switch (data) {
- case 0x1f:
- tdd->modo = 0;
- break;
- case 0x1b:
- tdd->modo = 1;
- break;
- default:
- if (tdd->modo == 0)
- d = ltrs[data];
- else
- d = figs[data];
- break;
- }
- return d;
-}
-
-void tdd_init(void)
-{
- /* Initialize stuff for inverse FFT */
- dr[0] = cos(TDD_SPACE * 2.0 * M_PI / 8000.0);
- di[0] = sin(TDD_SPACE * 2.0 * M_PI / 8000.0);
- dr[1] = cos(TDD_MARK * 2.0 * M_PI / 8000.0);
- di[1] = sin(TDD_MARK * 2.0 * M_PI / 8000.0);
-}
-
-struct tdd_state *tdd_new(void)
-{
- struct tdd_state *tdd;
- tdd = calloc(1, sizeof(*tdd));
- if (tdd) {
- tdd->fskd.spb = 176; /* 45.5 baud */
- tdd->fskd.hdlc = 0; /* Async */
- tdd->fskd.nbit = 5; /* 5 bits */
- tdd->fskd.nstop = 1.5; /* 1.5 stop bits */
- tdd->fskd.paridad = 0; /* No parity */
- tdd->fskd.bw=0; /* Filter 75 Hz */
- tdd->fskd.f_mark_idx = 0; /* 1400 Hz */
- tdd->fskd.f_space_idx = 1; /* 1800 Hz */
- tdd->fskd.pcola = 0; /* No clue */
- tdd->fskd.cont = 0; /* Digital PLL reset */
- tdd->fskd.x0 = 0.0;
- tdd->fskd.state = 0;
- tdd->pos = 0;
- tdd->mode = 0;
- tdd->charnum = 0;
- } else
- ast_log(LOG_WARNING, "Out of memory\n");
- return tdd;
-}
-
-int ast_tdd_gen_ecdisa(unsigned char *outbuf, int len)
-{
- int pos = 0;
- int cnt;
- while (len) {
- cnt = len > sizeof(ecdisa) ? sizeof(ecdisa) : len;
- memcpy(outbuf + pos, ecdisa, cnt);
- pos += cnt;
- len -= cnt;
- }
- return 0;
-}
-
-int tdd_feed(struct tdd_state *tdd, unsigned char *ubuf, int len)
-{
- int mylen = len;
- int olen;
- int b = 'X';
- int res;
- int c,x;
- short *buf = calloc(1, 2 * len + tdd->oldlen);
- short *obuf = buf;
- if (!buf) {
- ast_log(LOG_WARNING, "Out of memory\n");
- return -1;
- }
- memcpy(buf, tdd->oldstuff, tdd->oldlen);
- mylen += tdd->oldlen/2;
- for (x = 0; x < len; x++)
- buf[x + tdd->oldlen / 2] = AST_MULAW(ubuf[x]);
- c = res = 0;
- while (mylen >= 1320) { /* has to have enough to work on */
- olen = mylen;
- res = fsk_serie(&tdd->fskd, buf, &mylen, &b);
- if (mylen < 0) {
- ast_log(LOG_ERROR, "fsk_serial made mylen < 0 (%d) (olen was %d)\n", mylen, olen);
- free(obuf);
- return -1;
- }
- buf += (olen - mylen);
- if (res < 0) {
- ast_log(LOG_NOTICE, "fsk_serial failed\n");
- free(obuf);
- return -1;
- }
- if (res == 1) {
- /* Ignore invalid bytes */
- if (b > 0x7f)
- continue;
- c = tdd_decode_baudot(tdd,b);
- if ((c < 1) || (c > 126))
- continue; /* if not valid */
- break;
- }
- }
- if (mylen) {
- memcpy(tdd->oldstuff, buf, mylen * 2);
- tdd->oldlen = mylen * 2;
- } else
- tdd->oldlen = 0;
- free(obuf);
- if (res) {
- tdd->mode = 2;
-/* put it in mode where it
- reliably puts teleprinter in correct shift mode */
- return(c);
- }
- return 0;
-}
-
-void tdd_free(struct tdd_state *tdd)
-{
- free(tdd);
-}
-
-static inline float tdd_getcarrier(float *cr, float *ci, int bit)
-{
- /* Move along. There's nothing to see here... */
- float t;
- t = *cr * dr[bit] - *ci * di[bit];
- *ci = *cr * di[bit] + *ci * dr[bit];
- *cr = t;
-
- t = 2.0 - (*cr * *cr + *ci * *ci);
- *cr *= t;
- *ci *= t;
- return *cr;
-}
-
-#define PUT_BYTE(a) do { \
- *(buf++) = (a); \
- bytes++; \
-} while(0)
-
-#define PUT_AUDIO_SAMPLE(y) do { \
- int index = (short)(rint(8192.0 * (y))); \
- *(buf++) = AST_LIN2MU(index); \
- bytes++; \
-} while(0)
-
-#define PUT_TDD_MARKMS do { \
- int x; \
- for (x=0;x<8;x++) \
- PUT_AUDIO_SAMPLE(tdd_getcarrier(&cr, &ci, 1)); \
-} while(0)
-
-#define PUT_TDD_BAUD(bit) do { \
- while (scont < tddsb) { \
- PUT_AUDIO_SAMPLE(tdd_getcarrier(&cr, &ci, bit)); \
- scont += 1.0; \
- } \
- scont -= tddsb; \
-} while(0)
-
-#define PUT_TDD_STOP do { \
- while (scont < (tddsb * 1.5)) { \
- PUT_AUDIO_SAMPLE(tdd_getcarrier(&cr, &ci, 1)); \
- scont += 1.0; \
- } \
- scont -= (tddsb * 1.5); \
-} while(0)
-
-
-#define PUT_TDD(byte) do { \
- int z; \
- unsigned char b = (byte); \
- PUT_TDD_BAUD(0); /* Start bit */ \
- for (z = 0; z < 5; z++) { \
- PUT_TDD_BAUD(b & 1); \
- b >>= 1; \
- } \
- PUT_TDD_STOP; /* Stop bit */ \
-} while(0);
-
-int tdd_generate(struct tdd_state *tdd, unsigned char *buf, const char *str)
-{
- int bytes=0;
- int i,x;
- char c;
- /*! Baudot letters */
- static unsigned char lstr[31] = "\000E\nA SIU\rDRJNFCKTZLWHYPQOBG\000MXV";
- /*! Baudot figures */
- static unsigned char fstr[31] = "\0003\n- \00787\r$4',!:(5\")2\0006019?+\000./;";
- /* Initial carriers (real/imaginary) */
- float cr = 1.0;
- float ci = 0.0;
- float scont = 0.0;
-
- for(x = 0; str[x]; x++) {
- /* Do synch for each 72th character */
- if ( (tdd->charnum++) % 72 == 0)
- PUT_TDD(tdd->mode ? 27 /* FIGS */ : 31 /* LTRS */);
-
- c = toupper(str[x]);
-#if 0
- printf("%c",c); fflush(stdout);
-#endif
- if (c == 0) { /* send null */
- PUT_TDD(0);
- continue;
- }
- if (c == '\r') { /* send c/r */
- PUT_TDD(8);
- continue;
- }
- if (c == '\n') { /* send c/r and l/f */
- PUT_TDD(8);
- PUT_TDD(2);
- continue;
- }
- if (c == ' ') { /* send space */
- PUT_TDD(4);
- continue;
- }
- for (i = 0; i < 31; i++) {
- if (lstr[i] == c)
- break;
- }
- if (i < 31) { /* if we found it */
- if (tdd->mode) { /* if in figs mode, change it */
- PUT_TDD(31); /* Send LTRS */
- tdd->mode = 0;
- }
- PUT_TDD(i);
- continue;
- }
- for (i = 0; i < 31; i++) {
- if (fstr[i] == c)
- break;
- }
- if (i < 31) { /* if we found it */
- if (tdd->mode != 1) { /* if in ltrs mode, change it */
- PUT_TDD(27); /* send FIGS */
- tdd->mode = 1;
- }
- PUT_TDD(i); /* send byte */
- continue;
- }
- }
- return bytes;
-}
-