Add EOT message

When program keeps running, the ### EOT message allows the user
to know that the stdin has been fully transmitted.

COPYING

@@ -1,5 +1,5 @@
 minimodem - software audio Bell-type or RTTY FSK modem
-Copyright (C) 2011-2014 Kamal Mostafa <kamal@whence.com>
+Copyright (C) 2011-2016 Kamal Mostafa <kamal@whence.com>
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by

README

@@ -1,11 +1,11 @@
 minimodem - general-purpose software audio FSK modem
-Copyright (C) 2011-2014 Kamal Mostafa <kamal@whence.com>
+Copyright (C) 2011-2016 Kamal Mostafa <kamal@whence.com>
 
 Minimodem is a command-line program which decodes (or generates) audio
 modem tones at any specified baud rate, using various framing protocols.
 It acts a general-purpose software FSK modem, and includes support for
-various standard FSK protocols such as Bell103, Bell202, RTTY, NOAA SAME,
+various standard FSK protocols such as Bell103, Bell202, RTTY, TTY/TDD,
-and Caller-ID.
+NOAA SAME, and Caller-ID.
 
 Minimodem can play and capture audio modem tones in real-time via the
 system audio device, or in batched mode via audio files.

configure.ac

@@ -1,121 +1,79 @@
-dnl
-dnl configure.ac Generated by project-setup
-dnl
-
-AC_DEFUN([PKG_NAME],	[minimodem])
-AC_DEFUN([PKG_VERSION],	[0.22.1])
-AC_DEFUN([PKG_AUTHOR],	[Kamal Mostafa <kamal@whence.com>])
-AC_DEFUN([PKG_BUGS_TO],	[kamal@whence.com])
-
-
 AC_PREREQ([2.64])
+AC_INIT([minimodem], [0.24], [kamal@whence.com])
+AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_SRCDIR([src/Makefile.in])
+AM_INIT_AUTOMAKE
 
-AC_INIT(PKG_NAME, PKG_VERSION, PKG_BUGS_TO)
+VERSION=AC_PACKAGE_VERSION
-
-dnl Release versioning info
-VERSION=PKG_VERSION
 AC_SUBST(VERSION)
 
-AM_INIT_AUTOMAKE
+# Program Checks
-AC_CONFIG_SRCDIR([src/Makefile.in])
-
-AC_CONFIG_HEADERS([config.h])
-
-# AC_CONFIG_MACRO_DIR([m4])
-
-# Checks for programs.
 AC_PROG_CC
-# AC_PROG_RANLIB
 
+# Library Checks
+AC_SEARCH_LIBS([lroundf], [m])
 
-# Configure dependency libs
+deps_packages="fftw3f"
-
-AC_CHECK_LIB([m],[lroundf])
-
-#   fftw3f
-deps_packages+=" fftw3f"
 
 #   ALSA
-AC_ARG_WITH([alsa],
+AC_ARG_WITH([alsa], [AS_HELP_STRING([--without-alsa],
-    AS_HELP_STRING([--without-alsa], [build without ALSA support]))
+            [build without ALSA support])])
-AS_IF([test "x$with_alsa" == "xno"],
+AS_IF([test "x$with_alsa" == "xno"], [
-        # then
+    use_alsa=0
-	use_alsa=0,
+], [
-	# else
+    use_alsa=1
-	use_alsa=1
+    deps_packages="$deps_packages alsa"
-	deps_packages+=" alsa")
+])
-AC_DEFINE_UNQUOTED(USE_ALSA, $use_alsa,
+AC_DEFINE_UNQUOTED([USE_ALSA], [$use_alsa],
-	[Define to 1 to enable ALSA support])
+                   [Define to 1 to enable ALSA support])
 
 #   pulseaudio
-AC_ARG_WITH([pulseaudio],
+AC_ARG_WITH([pulseaudio], AS_HELP_STRING([--without-pulseaudio],
-    AS_HELP_STRING([--without-pulseaudio], [build without pulseaudio support]))
+            [build without pulseaudio support]))
-AS_IF([test "x$with_pulseaudio" == "xno"],
+AS_IF([test "x$with_pulseaudio" == "xno"], [
-        # then
+    use_pulseaudio=0
-	use_pulseaudio=0,
+], [
-	# else
+    use_pulseaudio=1
-	use_pulseaudio=1
+    deps_packages="$deps_packages libpulse-simple"
-	deps_packages+=" libpulse-simple")
+])
-AC_DEFINE_UNQUOTED(USE_PULSEAUDIO, $use_pulseaudio,
+AC_DEFINE_UNQUOTED([USE_PULSEAUDIO], [$use_pulseaudio],
-	[Define to 1 to enable pulseaudio support])
+                   [Define to 1 to enable pulseaudio support])
 
 #   sndfile
-AC_ARG_WITH([sndfile],
+AC_ARG_WITH([sndfile], AS_HELP_STRING([--without-sndfile],
-    AS_HELP_STRING([--without-sndfile], [build without sndfile support]))
+            [build without sndfile support]))
-AS_IF([test "x$with_sndfile" == "xno"],
+AS_IF([test "x$with_sndfile" == "xno"], [
-        # then
+    use_sndfile=0
-	use_sndfile=0,
+], [
-	# else
+    use_sndfile=1
-	use_sndfile=1
+    deps_packages="$deps_packages sndfile"
-	deps_packages+=" sndfile")
+])
-AC_DEFINE_UNQUOTED(USE_SNDFILE, $use_sndfile,
+AC_DEFINE_UNQUOTED([USE_SNDFILE], [$use_sndfile],
-	[Define to 1 to enable sndfile support])
+                   [Define to 1 to enable sndfile support])
 
 #   benchmarks
-AC_ARG_WITH([benchmarks],
+AC_ARG_WITH([benchmarks], AS_HELP_STRING([--disable-benchmarks],
-    AS_HELP_STRING([--disable-benchmarks], [build without internal benchmarks]))
+            [build without internal benchmarks]))
-AS_IF([test "x$with_benchmarks" == "xno"],
+AS_IF([test "x$with_benchmarks" == "xno"], [
-        # then
+    use_benchmarks=0
-	use_benchmarks=0,
+], [
-	# else
+    use_benchmarks=1
-	use_benchmarks=1)
+])
-AC_DEFINE_UNQUOTED(USE_BENCHMARKS, $use_benchmarks,
+AC_DEFINE_UNQUOTED([USE_BENCHMARKS], [$use_benchmarks],
-	[Define to 1 to enable internal benchmarks])
+                   [Define to 1 to enable internal benchmarks])
-
 
 AC_MSG_RESULT([
-PKG_NAME PKG_VERSION configuration summary:
+option summary:
-	--with-pulseaudio     $with_pulseaudio ($use_pulseaudio)
+    alsa           $with_alsa ($use_alsa)
-	--with-alsa           $with_alsa ($use_alsa)
+    benchmarks     $with_benchmarks ($use_benchmarks)
-	--with-sndfile        $with_sndfile ($use_sndfile)
+    pulseaudio     $with_pulseaudio ($use_pulseaudio)
-	--with-benchmarks     $with_benchmarks ($use_benchmarks)
+    sndfile        $with_sndfile ($use_sndfile)
-	deps_packages:        $deps_packages
 ])
 
-
 # Checks for libraries.
-PKG_CHECK_MODULES(DEPS, [ $deps_packages ])
+PKG_CHECK_MODULES(DEPS, [$deps_packages])
-
-AC_SUBST(DEPS_CFLAGS)
-AC_SUBST(DEPS_LIBS)
 
 AC_SUBST([auto_find_tests], ['$(sort $(wildcard *.test))'])
 
-# Checks for header files.
+AC_CONFIG_FILES([Makefile src/Makefile src/minimodem.1 tests/Makefile])
-# AC_CHECK_HEADERS([stdlib.h string.h unistd.h])
-
-# Checks for typedefs, structures, and compiler characteristics.
-# AC_HEADER_STDBOOL
-# AC_TYPE_PID_T
-
-# Checks for library functions.
-# AC_FUNC_FORK
-
-AC_CONFIG_FILES([
-		 Makefile
-                 src/Makefile
-                 src/minimodem.1
-                 tests/Makefile
-		])
-#                 testdata/Makefile
 AC_OUTPUT

debian/changelog

@@ -1,3 +1,29 @@
+minimodem (0.24-1) unstable; urgency=medium
+
+  [ Chris Osborn ]
+
+  * Limit carrier/idle generation for input with delays
+
+  [ Kamal Mostafa ]
+
+  * Fix --tx float consistency: disable .wav "PEAK chunk" header
+  * Do not emit 0.5 sec flush for audio file output
+  * debian: bump standards-version=3.9.7 and debhelper-compat-version=9
+
+  [ Colin Ian King ]
+
+  * multiple static analysis and warnings fixes
+
+ -- Kamal Mostafa <kamal@whence.com>  Sat, 23 Apr 2016 10:35:44 -0700
+
+minimodem (0.23-1) unstable; urgency=medium
+
+  [ Rodrigo Menezes ]
+
+  * TTY/TDD support
+
+ -- Kamal Mostafa <kamal@whence.com>  Fri, 19 Feb 2016 13:05:07 -0800
+
 minimodem (0.22.1-1) unstable; urgency=medium
 
   * Do not enable tx-carrier for non-interactive --file sessions

debian/compat

@@ -1 +1 @@
-7
+9

debian/control

@@ -2,8 +2,8 @@ Source: minimodem
 Section: comm
 Priority: optional
 Maintainer: Kamal Mostafa <kamal@whence.com>
-Build-Depends: debhelper (>= 7.0.50~), libfftw3-dev, libpulse-dev, libasound2-dev [linux-any], libsndfile1-dev 
+Build-Depends: debhelper (>= 9), libfftw3-dev, libpulse-dev, libasound2-dev [linux-any], libsndfile1-dev
-Standards-Version: 3.9.6
+Standards-Version: 3.9.7
 Homepage: http://www.whence.com/minimodem
 Vcs-Git: https://github.com/kamalmostafa/minimodem.git
 Vcs-Browser: https://github.com/kamalmostafa/minimodem
@@ -16,8 +16,8 @@ Description: general-purpose software audio FSK modem
  Minimodem is a command-line program which decodes (or generates) audio
  modem tones at any specified baud rate, using various framing protocols.
  It acts a general-purpose software FSK modem, and includes support for
- various standard FSK protocols such as Bell103, Bell202, RTTY, NOAA SAME,
+ various standard FSK protocols such as Bell103, Bell202, RTTY, TTY/TDD,
- and Caller-ID.
+ NOAA SAME, and Caller-ID.
  .
  Minimodem can play and capture audio modem tones in real-time via the
  system audio device, or in batched mode via audio files.

debian/copyright

@@ -4,7 +4,7 @@ Upstream-Contact: Kamal Mostafa <kamal@whence.com>
 Source: http://www.whence.com/minimodem
 
 Files: *
-Copyright: 2011-2014 Kamal Mostafa <kamal@whence.com>
+Copyright: 2011-2016 Kamal Mostafa <kamal@whence.com>
 License: GPL-3.0+
 
 Files: src/*uic*
@@ -12,7 +12,7 @@ Copyright: 2014 Marcos Vives Del Sol <socram8888@gmail.com>
 License: GPL-3.0+
 
 Files: debian/*
-Copyright: 2011-2014 Kamal Mostafa <kamal@whence.com>
+Copyright: 2011-2016 Kamal Mostafa <kamal@whence.com>
 License: GPL-3.0+
 
 License: GPL-3.0+

src/Makefile.am

@@ -1,7 +1,7 @@
 #
 # Makefile.am
 #
-# Copyright (C) 2011-2012 Kamal Mostafa <kamal@whence.com>
+# Copyright (C) 2011-2016 Kamal Mostafa <kamal@whence.com>
 #
 #  This program is free software: you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by

src/baudot.c

@@ -194,7 +194,7 @@ baudot_encode_table[0x60][2] = {
  * 1 LTRS state
  * 2 FIGS state
  */
-static int baudot_charset = 0;		// FIXME
+static unsigned int baudot_charset = 0;		// FIXME
 
 
 void

src/fsk.c

@@ -1,7 +1,7 @@
 /*
  * fsk.c
  *
- * Copyright (C) 2011-2012 Kamal Mostafa <kamal@whence.com>
+ * Copyright (C) 2011-2016 Kamal Mostafa <kamal@whence.com>
  *
  *  This program is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -62,7 +62,7 @@ fsk_plan_new(
 	errno = EINVAL;
 	return NULL;
     }
-    debug_log("### b_mark=%u b_space=%u fftsize=%u\n",
+    debug_log("### b_mark=%u b_space=%u fftsize=%d\n",
 	    fskp->b_mark, fskp->b_space, fskp->fftsize);
 
 
@@ -202,7 +202,7 @@ fsk_frame_analyze( fsk_plan *fskp, float *samples, float samples_per_bit,
 	assert( expect_bits[bitnum] == '1' || expect_bits[bitnum] == '0' );
 
 	bit_begin_sample = (float)(samples_per_bit * bitnum + 0.5f);
-	debug_log( " bit# %2u @ %7u: ", bitnum, bit_begin_sample);
+	debug_log( " bit# %2d @ %7u: ", bitnum, bit_begin_sample);
 	fsk_bit_analyze(fskp, samples+bit_begin_sample, bit_nsamples,
 		&bit_values[bitnum],
 		&bit_sig_mags[bitnum],
@@ -247,7 +247,7 @@ fsk_frame_analyze( fsk_plan *fskp, float *samples, float samples_per_bit,
 	if ( expect_bits[bitnum] != 'd' )
 	    continue;
 	bit_begin_sample = (float)(samples_per_bit * bitnum + 0.5f);
-	debug_log( " bit# %2u @ %7u: ", bitnum, bit_begin_sample);
+	debug_log( " bit# %2d @ %7u: ", bitnum, bit_begin_sample);
 	fsk_bit_analyze(fskp, samples+bit_begin_sample, bit_nsamples,
 		&bit_values[bitnum],
 		&bit_sig_mags[bitnum],
@@ -440,7 +440,7 @@ fsk_frame_analyze( fsk_plan *fskp, float *samples, float samples_per_bit,
     for ( bitnum=0; bitnum<n_bits; bitnum++ )
 	*bits_outp |= (unsigned long long) bit_values[bitnum] << bitnum;
 
-    debug_log("    frame algo=%u confidence=%f ampl=%f\n",
+    debug_log("    frame algo=%d confidence=%f ampl=%f\n",
 	    CONFIDENCE_ALGO, confidence, *ampl_outp);
     return confidence;
 }
@@ -474,14 +474,14 @@ fsk_find_frame( fsk_plan *fskp, float *samples, unsigned int frame_nsamples,
     int j;
     for ( j=0; ; j++ )
     {
-	int up = j%2 ? 1 : -1;
+	int up = ( j % 2 ) ? 1 : -1;
 	int t = try_first_sample + up*((j+1)/2)*try_step_nsamples;
 	if ( t >= (int)try_max_nsamples )
 	    break;
 	if ( t < 0 )
 	    continue;
 
-	float c, ampl_out;
+	float c, ampl_out = 0.0;
 	unsigned long long bits_out = 0;
 	debug_log("try fsk_frame_analyze at t=%d\n", t);
 	c = fsk_frame_analyze(fskp, samples+t, samples_per_bit,
@@ -525,8 +525,8 @@ fsk_find_frame( fsk_plan *fskp, float *samples, unsigned int frame_nsamples,
 
     debug_log("FSK_FRAME bits='");
     for ( j=0; j<expect_n_bits; j++ )
-	debug_log("%c", ( *bits_outp >> j ) & 1 ? '1' : '0' );
+	debug_log("%c", ( ( *bits_outp >> j ) & 1 ) ? '1' : '0' );
-    debug_log("' datum='%c' (0x%02x)   c=%f  a=%f  t=%d\n",
+    debug_log("' datum='%c' (0x%02x)   c=%f  a=%f  t=%u\n",
 	    isprint(bitchar)||isspace(bitchar) ? bitchar : '.',
 	    bitchar,
 	    confidence, best_a, best_t);

src/minimodem.1.in

@@ -30,8 +30,8 @@ minimodem \- general-purpose software audio FSK modem
 is a command-line program which decodes (or generates) audio
 modem tones at any specified baud rate, using various framing protocols.
 It acts a general-purpose software FSK modem, and includes support for
-various standard FSK protocols such as Bell103, Bell202, RTTY, NOAA SAME,
+various standard FSK protocols such as Bell103, Bell202, RTTY, TTY/TDD,
-and Caller-ID.
+NOAA SAME, and Caller-ID.
 .PP
 .B Minimodem
 can play and capture audio modem tones in real-time via the system
@@ -67,6 +67,9 @@ default mark and space tone frequencies.
 .B    rtty
 : RTTY 45.45 bps \-\-baudot \-\-stopbits 1.5
 .TP
+.B    tdd
+: TTY/TDD 45.45 bps \-\-baudot \-\-stopbits 2.0
+.TP
 .B    same
 : SAME 520.83 bps \-\-startbits 0 \-\-stopbits 0 \-\-sync-byte 0xAB
 .br
@@ -187,6 +190,9 @@ Filter the received text output, replacing any "non-printable" bytes
 with a '.' character.
 (This option applies to \-\-rx mode only).
 .TP
+.B \-\-print-eot
+Print "### EOT" to stderr after each transmit completes.
+.TP
 .B \-\-tx-carrier
 When transmitting from a blocking source, keep a carrier going while waiting
 for more data.
@@ -233,7 +239,7 @@ The latest version is available at <http://www.whence.com/minimodem>.
 .B minimodem
 was written by Kamal Mostafa <kamal@whence.com>.
 .SH COPYRIGHT
-Copyright \(co 2011-2014 by Kamal Mostafa <kamal@whence.com>.
+Copyright \(co 2011-2016 by Kamal Mostafa <kamal@whence.com>.
 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
 .br
 This is free software: you are free to change and redistribute it.

src/minimodem.c

@@ -3,7 +3,7 @@
  *
  * minimodem - software audio Bell-type or RTTY FSK modem
  *
- * Copyright (C) 2011-2014 Kamal Mostafa <kamal@whence.com>
+ * Copyright (C) 2011-2016 Kamal Mostafa <kamal@whence.com>
  *
  *  This program is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -46,12 +46,14 @@
 char *program_name = "";
 
 int		tx_transmitting = 0;
+int		tx_print_eot = 0;
 int		tx_leader_bits_len = 2;
 int		tx_trailer_bits_len = 2;
 
 simpleaudio	*tx_sa_out;
 float		tx_bfsk_mark_f;
 unsigned int	tx_bit_nsamples;
+unsigned int	tx_flush_nsamples;
 
 void
 tx_stop_transmit_sighandler( int sig )
@@ -62,11 +64,12 @@ tx_stop_transmit_sighandler( int sig )
     for ( j=0; j<tx_trailer_bits_len; j++ )
 	simpleaudio_tone(tx_sa_out, tx_bfsk_mark_f, tx_bit_nsamples);
 
-    // 0.5 sec of zero samples to flush - FIXME lame
+    if ( tx_flush_nsamples )
-    size_t sample_rate = simpleaudio_get_rate(tx_sa_out);
+	simpleaudio_tone(tx_sa_out, 0, tx_flush_nsamples);
-    simpleaudio_tone(tx_sa_out, 0, sample_rate/2);
 
     tx_transmitting = 0;
+    if ( tx_print_eot )
+	fprintf(stderr, "### EOT\n");
 }
 
 
@@ -130,6 +133,10 @@ static void fsk_transmit_stdin(
     tx_sa_out = sa_out;
     tx_bfsk_mark_f = bfsk_mark_f;
     tx_bit_nsamples = bit_nsamples;
+    if ( tx_interactive )
+	tx_flush_nsamples = sample_rate/2; // 0.5 sec of zero samples to flush
+    else
+	tx_flush_nsamples = 0;
 
     // one-shot
     struct itimerval itv = {
@@ -142,6 +149,9 @@ static void fsk_transmit_stdin(
 	{0, 0}						// it_value
     };
 
+    // arbitrary chosen timeout value: 1/25 of a second
+    unsigned int idle_carrier_usec = (1000000/25);
+
     int block_input = tx_interactive && !txcarrier;
     if ( block_input )
 	signal(SIGALRM, tx_stop_transmit_sighandler);
@@ -159,8 +169,16 @@ static void fsk_transmit_stdin(
     {
         FD_ZERO(&fdset);
         FD_SET(fd, &fdset);
-        struct timeval tv_zero = { 0, 0 };
+        struct timeval tv_idletimeout = { 0, 0 };
-        if( block_input || select(fd+1, &fdset, NULL, NULL, &tv_zero) )
+
+	if ( !tx_interactive ) {
+	    // When stdin blocks we "emit idle tone", for a duration of
+	    // idle_carrier_usec.  If !tx_interactive (i.e. writing to an
+	    // audio file) make the select timeout the same duration.
+	    tv_idletimeout.tv_usec = idle_carrier_usec;
+	}
+
+        if( block_input || select(fd+1, &fdset, NULL, NULL, &tv_idletimeout) )
         {
 	    n_read = read(fd, &buf, sizeof(buf));
 	    if( n_read <= 0 ) //Includes EOF (0) and errors (-1)
@@ -211,10 +229,10 @@ static void fsk_transmit_stdin(
         else
         {
 	    tx_transmitting = 1;
-	    unsigned int j;
             /* emit idle tone (mark) */
-            for ( j=0; j<tx_leader_bits_len; j++ )
+	    simpleaudio_tone(sa_out,
-                simpleaudio_tone(sa_out, invert_start_stop ? bfsk_space_f : bfsk_mark_f, sample_rate/50);
+		    invert_start_stop ? bfsk_space_f : bfsk_mark_f,
+		    idle_carrier_usec * sample_rate / 1000000);
 	}
 
 	if ( block_input )
@@ -360,7 +378,7 @@ version()
 {
     printf(
     "minimodem %s\n"
-    "Copyright (C) 2011-2014 Kamal Mostafa <kamal@whence.com>\n"
+    "Copyright (C) 2011-2016 Kamal Mostafa <kamal@whence.com>\n"
     "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.\n"
     "This is free software: you are free to change and redistribute it.\n"
     "There is NO WARRANTY, to the extent permitted by law.\n\n"
@@ -403,12 +421,14 @@ usage()
     "		    --binary-output\n"
     "		    --binary-raw {nbits}\n"
     "		    --print-filter\n"
+    "		    --print-eot\n"
     "		    --tx-carrier\n"
     "		{baudmode}\n"
     "	    any_number_N       Bell-like      N bps --ascii\n"
     "		    1200       Bell202     1200 bps --ascii\n"
     "		     300       Bell103      300 bps --ascii\n"
     "		    rtty       RTTY       45.45 bps --baudot --stopbits=1.5\n"
+    "		     tdd       TTY/TDD    45.45 bps --baudot --stopbits=2.0\n"
     "		    same       NOAA SAME 520.83 bps --sync-byte=0xAB ...\n"
     "		callerid       Bell202 CID 1200 bps\n"
     "     uic{-train,-ground}       UIC-751-3 Train/Ground 600 bps\n"
@@ -561,6 +581,7 @@ main( int argc, char*argv[] )
 	MINIMODEM_OPT_BINARY_RAW,
 	MINIMODEM_OPT_PRINT_FILTER,
 	MINIMODEM_OPT_XRXNOISE,
+	MINIMODEM_OPT_PRINT_EOT,
 	MINIMODEM_OPT_TXCARRIER
     };
 
@@ -600,6 +621,7 @@ main( int argc, char*argv[] )
 	    { "binary-output",	0, 0, MINIMODEM_OPT_BINARY_OUTPUT },
 	    { "binary-raw",	1, 0, MINIMODEM_OPT_BINARY_RAW },
 	    { "print-filter",	0, 0, MINIMODEM_OPT_PRINT_FILTER },
+	    { "print-eot",	0, 0, MINIMODEM_OPT_PRINT_EOT },
 	    { "Xrxnoise",	1, 0, MINIMODEM_OPT_XRXNOISE },
 	    { "tx-carrier",      0, 0, MINIMODEM_OPT_TXCARRIER },
 	    { 0 }
@@ -733,6 +755,9 @@ main( int argc, char*argv[] )
 	    case MINIMODEM_OPT_TXCARRIER:
 			txcarrier = 1;
 			break;
+	    case MINIMODEM_OPT_PRINT_EOT:
+			tx_print_eot = 1;
+			break;
 	    default:
 			usage();
 	}
@@ -781,6 +806,16 @@ main( int argc, char*argv[] )
 	    bfsk_n_data_bits = 5;
 	if ( bfsk_nstopbits < 0 )
 	    bfsk_nstopbits = 1.5;
+    } else if ( strncasecmp(modem_mode, "tdd",4)==0 ) {
+	bfsk_databits_decode = databits_decode_baudot;
+	bfsk_databits_encode = databits_encode_baudot;
+	bfsk_data_rate = 45.45;
+	if ( bfsk_n_data_bits == 0 )
+	    bfsk_n_data_bits = 5;
+	if ( bfsk_nstopbits < 0 )
+	    bfsk_nstopbits = 2.0;
+	bfsk_mark_f = 1400;
+	bfsk_space_f = 1800;
     } else if ( strncasecmp(modem_mode, "same",5)==0 ) {
 	// http://www.nws.noaa.gov/nwr/nwrsame.htm
 	bfsk_data_rate = 520.0 + 5/6.0;
@@ -1100,7 +1135,7 @@ main( int argc, char*argv[] )
 	    assert ( samples_nvalid + read_nsamples <= samplebuf_size );
 	    ssize_t r;
 	    r = simpleaudio_read(sa, samples_readptr, read_nsamples);
-	    debug_log("simpleaudio_read(samplebuf+%zd, n=%zu) returns %zd\n",
+	    debug_log("simpleaudio_read(samplebuf+%td, n=%zu) returns %zd\n",
 		    samples_readptr - samplebuf, read_nsamples, r);
 	    if ( r < 0 ) {
 		fprintf(stderr, "simpleaudio_read: error\n");
@@ -1363,7 +1398,7 @@ main( int argc, char*argv[] )
 	if (bfsk_msb_first) {
 		bits = bit_reverse(bits, bfsk_n_data_bits);
 	}
-	debug_log("Input: %08x%08x - Databits: %i - Shift: %i\n", (unsigned int)(bits >> 32), (unsigned int)bits, bfsk_n_data_bits, bfsk_nstartbits);
+	debug_log("Input: %08x%08x - Databits: %u - Shift: %i\n", (unsigned int)(bits >> 32), (unsigned int)bits, bfsk_n_data_bits, bfsk_nstartbits);
 
 	unsigned int dataout_size = 4096;
 	char dataoutbuf[4096];

src/simple-tone-generator.c

@@ -1,7 +1,7 @@
 /*
  * simple-tone-generator.c
  *
- * Copyright (C) 2011-2012 Kamal Mostafa <kamal@whence.com>
+ * Copyright (C) 2011-2016 Kamal Mostafa <kamal@whence.com>
  *
  *  This program is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by

src/simpleaudio-sndfile.c

@@ -200,6 +200,15 @@ sa_sndfile_open_stream(
         return 0;
     }
 
+    // Disable the insertion of this questionable "PEAK chunk" header thing.
+    // Relates only to writing SF_FORMAT_FLOAT .wav and .aiff files
+    // (minimodem --tx --float-samples).  When left enabled, this adds some
+    // wonky bytes to the header which change from run to run (different every
+    // wall-clock second.  WTF?
+    // http://www.mega-nerd.com/libsndfile/command.html#SFC_SET_ADD_PEAK_CHUNK
+    /* Turn off the PEAK chunk. */
+    sf_command(s, SFC_SET_ADD_PEAK_CHUNK, NULL, SF_FALSE);
+
     /* good or bad to override these? */
     sa->rate = sfinfo.samplerate;
     sa->channels = sfinfo.channels;

tests/16-verify-tx-consistent.test

@@ -0,0 +1,44 @@
+#!/bin/bash
+
+MINIMODEM="${MINIMODEM-./minimodem}"
+[ -f "$MINIMODEM" ] || {
+    MINIMODEM="../src/minimodem"
+    [ -f "$MINIMODEM" ] || {
+	echo "E: cannot find minimodem in ./ or ../src/" 1>&2
+	exit 1
+    }
+}
+
+minimodem_tx_args="1200 $1"
+
+textfile="testdata-ascii.txt"
+
+TMPF="/tmp/minimodem-test-$$"
+trap "rm -f $TMPF.*" 0
+
+set -e
+
+$MINIMODEM --tx --file $TMPF.1.wav $minimodem_tx_args < "$textfile"
+sleep 1
+$MINIMODEM --tx --file $TMPF.2.wav $minimodem_tx_args < "$textfile"
+sleep 1
+$MINIMODEM --tx --file $TMPF.3.wav $minimodem_tx_args < "$textfile"
+
+cmp -s $TMPF.1.wav $TMPF.2.wav || {
+    echo -e "TX-NOT-CONSISTENT"
+    exit 1
+}
+
+cmp -s $TMPF.1.wav $TMPF.3.wav || {
+    echo -e "TX-NOT-CONSISTENT"
+    exit 1
+}
+
+stats="three runs of '--tx $minimodem_tx_args' created identical output"
+
+result="OK     "
+exitcode=0
+
+echo -e "$result $stats"
+
+exit $exitcode

tests/17-verify-tx-consistent-float.test

@@ -0,0 +1 @@
+exec ./16-verify-tx-consistent.test --float-samples

tests/81-tdd.test

@@ -0,0 +1 @@
+exec ./self-test testdata-baudot.txt tdd

tests/testdata-ascii.txt

@@ -15,34 +15,3 @@ the quick brown fox jumps over the lazy dog
 	Earning our SkyMiles
 
 ----------------------------------------------------------------------------
-
-minimodem - software audio Bell-type or RTTY FSK modem
-Copyright (C) 2011-2012 Kamal Mostafa <kamal@whence.com>
-
-Minimodem is a command-line program which generates (or decodes) audio
-modem tones at any specified baud rate, emulating an old Bell-type or
-radio-teletype FSK modem.  The tones can be played to (or recorded from)
-the system audio (PulseAudio or ALSA) or to an audio file.
-
-Minimodem can be used to transfer data between nearby computers using an
-audio cable (or just via sound waves), or between remote computers using
-radio, telephone, or another audio communications medium.
-
-----------------------------------------------------------------------------
-
-minimodem - software audio Bell-type or RTTY FSK modem
-Copyright (C) 2011-2012 Kamal Mostafa <kamal@whence.com>
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-