**
** Copyright (c) 2003 Kevin Rosenberg
**
-** $Id: wdq2wav.cpp,v 1.25 2003/02/25 18:24:48 kevin Exp $
+** $Id: wdq2wav.cpp,v 1.26 2003/02/28 04:12:17 kevin Exp $
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License (version 2) as
#include <wdq2wav.h>
-const char* g_szIdStr = "$Id: wdq2wav.cpp,v 1.25 2003/02/25 18:24:48 kevin Exp $";
+const char* g_szIdStr = "$Id: wdq2wav.cpp,v 1.26 2003/02/28 04:12:17 kevin Exp $";
bool g_quiet = false;
bool g_verbose = false;
bool g_debug = false;
-bool g_ignore_zero = false;
+bool g_preserve_zero = false;
bool g_demean = false;
std::cout << "OPTIONS\n";
std::cout << " -p Play channel through audio system\n";
std::cout << " -q Supress all messages\n";
- std::cout << " -z Scale output without regard for windaq zero point\n";
+ std::cout << " -z Scale output with preserving zero point\n";
std::cout << " -m Demean the data (subtract the mean value from each sample)\n";
+ std::cout << " [Selecting this option automatically sets the -z option]\n";
std::cout << " -v Verbose mode\n";
std::cout << " -d Debug mode\n";
std::cout << " -r Print program version\n";
break;
case 'm':
g_demean = true;
+ g_preserve_zero = true; // auto set
+ break;
+ case 'z':
+ g_preserve_zero = true;
break;
case 'v':
g_verbose = true;
case 'p':
play = true;
break;
- case 'z':
- g_ignore_zero = true;
- break;
case 'h':
usage (progname);
return (0);
m_rate = wdq_channel.r_wdq.m_sample_rate;
double data_offset = 0, data_scale = 0;
- if (g_ignore_zero) {
- data_offset = -wdq_channel.m_min_scaled_data;
- if (wdq_channel.m_max_scaled_data != wdq_channel.m_min_scaled_data)
- data_scale = 65535. / (wdq_channel.m_max_scaled_data -
- wdq_channel.m_min_scaled_data);
- } else {
+ if (g_preserve_zero) {
double max_value = fabs(wdq_channel.m_max_scaled_data);
if (fabs (wdq_channel.m_min_scaled_data) > max_value)
max_value = fabs (wdq_channel.m_min_scaled_data);
if (max_value != 0.)
data_scale = 32767. / max_value;
+ } else {
+ data_offset = -wdq_channel.m_min_scaled_data;
+ if (wdq_channel.m_max_scaled_data != wdq_channel.m_min_scaled_data)
+ data_scale = 65535. / (wdq_channel.m_max_scaled_data -
+ wdq_channel.m_min_scaled_data);
}
if (g_debug) {
for (i = 0; i < m_nSamples; i++) {
double value = input[i];
value = (slope * value) + intercept;
- if (g_ignore_zero) {
+ if (g_preserve_zero) {
+ value = value * data_scale;
+ } else {
value = (value + data_offset) * data_scale;
value += 0.5 - 32768;
- } else
- value = value * data_scale;
+ }
signed short int v = static_cast<signed short int>(value);
#if WORDS_BIG_ENDIAN