**
** Copyright (c) 2003 Kevin Rosenberg
**
-** $Id: wdq2wav.cpp,v 1.22 2003/02/25 18:15:06 kevin Exp $
+** $Id$
**
** 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 1.22 2003/02/25 18:15:06 kevin Exp $";
+const char* g_szIdStr = "$Id$";
bool g_quiet = false;
bool g_verbose = false;
bool g_debug = false;
bool g_ignore_zero = false;
-bool g_demean = false;
+bool g_dont_demean = false;
#ifdef WIN32
const char*
fileBasename (const char* filename)
{
- const char* p = strrchr (filename, '/');
- return (p ? p + 1 : filename);
+ const char* pslash = strrchr (filename, '/');
+ const char* pbackslash = strrchr (filename, '\\');
+ const char* p = filename;
+ if (pbackslash && (! pslash || pbackslash >= pslash))
+ p = pbackslash+1;
+ else if (pslash && (! pbackslash || pslash >= pbackslash))
+ p = pslash+1;
+
+ return p;
}
char *
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 << " -m Demean the data (subtract the mean value from each sample)\n";
+ std::cout << " -z Scale output without preserving zero point\n";
+ std::cout << " -m Do not demean the data (don't subtract the mean value from each sample)\n";
std::cout << " -v Verbose mode\n";
std::cout << " -d Debug mode\n";
- std::cout << " -r Print program version\n";
+ std::cout << " -r Print program version and exit\n";
std::cout << " -h Print this help message\n";
}
switch (c) {
case 'r':
std::cout << "Version " << g_szIdStr << std::endl;
+ exit(0);
break;
case 'q':
g_quiet = true;
break;
case 'm':
- g_demean = true;
+ g_dont_demean = true;
+ break;
+ case 'z':
+ g_ignore_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);
return (1);
}
}
+
+ if (g_verbose || g_debug)
+ std::cout << "Version " << g_szIdStr << std::endl;
+
argc -= optind;
argv += optind;
if (argc > 3) {
}
if (! g_quiet || g_verbose || g_debug) {
std::ostringstream os1;
- os1 << "File " << wdq_fname;
+ os1 << "File: " << wdq_fname;
info_msg (os1.str().c_str());
+ std::ostringstream os;
+ os << "Legacy Format: ";
+ if (wdq.m_bLegacy_format)
+ os << "Yes";
+ else
+ os << "No";
+ info_msg(os.str().c_str());
std::ostringstream os2;
time_t time = wdq.m_time_acq_start;
struct tm* tm = gmtime (&time);
return true;
}
+bool read_float8 (int fd, double& f)
+{
+ unsigned char buf[8];
+ if (read (fd, &buf, 8) != 8)
+ return false;
+
+#if WORDS_BIG_ENDIAN
+ unsigned char c;
+ c = buf[0]; buf[0] = buf[7]; buf[7] = c;
+ c = buf[1]; buf[1] = buf[6]; buf[6] = c;
+ c = buf[2]; buf[2] = buf[5]; buf[5] = c;
+ c = buf[3]; buf[3] = buf[4]; buf[4] = c;
+#endif
+
+ f = *(reinterpret_cast<double*>(buf));
+
+ return true;
+}
+
bool
WindaqFile::ReadHeader ()
{
if (! read_int2 (m_fd, tmp2))
return false;
- m_nChannels = tmp2 & 0x1f;
m_sr_denom = (tmp2 & 0x7fff) >> 5;
m_sr_numer = (tmp2 & 0x8000) << 1;
-
+ short unsigned int byte1 = (tmp2 & 0xFF00) >> 8;
+ short unsigned int byte2 = tmp2 & 0xFF;
+ if (byte1 == 0 || byte1 == 1) {
+ m_bLegacy_format = false;
+ } else {
+ m_bLegacy_format = true;
+ }
if (! read_int2 (m_fd, tmp2))
return false;
m_sr_numer |= tmp2;
- m_sample_rate = (double) m_sr_numer / (double) (m_sr_denom * m_nChannels);
-
if (! read_int2 (m_fd, tmp2))
return false;
if (! read_int2 (m_fd, m_nHeader_bytes))
return false;
-
+
+ m_nMaxChannels = (m_nHeader_bytes - 112) / 36;
+ if (m_nMaxChannels >= 144)
+ m_nChannels = byte2 & 0xFF;
+ else
+ m_nChannels = byte2 & 0x1F;
+
if (! read_int4 (m_fd, m_nData_bytes))
return false;
m_nSamples = (m_nData_bytes / m_nChannels) / 2;
+ lseek (m_fd, 28, SEEK_SET);
+ if (! read_float8 (m_fd, m_time_between_channel_samples))
+ return false;
+
+ if (m_bLegacy_format)
+ m_sample_rate = (double) m_sr_numer / (double) (m_sr_denom * m_nChannels);
+ else
+ m_sample_rate = (double) m_nChannels / m_time_between_channel_samples;
+
lseek (m_fd, 36, SEEK_SET);
if (! read_int4 (m_fd, m_time_acq_start))
return false;
m_valid = true;
return true;
}
-
WindaqChannel::WindaqChannel (WindaqFile& wdq, const int channel)
: r_wdq(wdq), m_data(0), m_slope(0), m_intercept (0), m_channel(channel),
delete m_data;
}
-bool get_float8 (int fd, double& f)
-{
- unsigned char buf[8];
- if (read (fd, &buf, 8) != 8)
- return false;
-
-#if WORDS_BIG_ENDIAN
- unsigned char c;
- c = buf[0]; buf[0] = buf[7]; buf[7] = c;
- c = buf[1]; buf[1] = buf[6]; buf[6] = c;
- c = buf[2]; buf[2] = buf[5]; buf[5] = c;
- c = buf[3]; buf[3] = buf[4]; buf[4] = c;
-#endif
-
- f = *(reinterpret_cast<double*>(buf));
-
- return true;
-}
-
-
bool
WindaqChannel::read_channel_data ()
{
lseek (fd, r_wdq.m_channel_offset + 8 +
(m_channel - 1) * r_wdq.m_nBytes_channel_header,
SEEK_SET);
- if (! get_float8 (fd, m_slope))
+ if (! read_float8 (fd, m_slope))
return false;
- if (! get_float8 (fd, m_intercept))
+ if (! read_float8 (fd, m_intercept))
return false;
char units[7];
m_units = units;
long int row_bytes = 2 * r_wdq.m_nChannels;
+
signed short int *sample_row = new signed short int [row_bytes];
signed short int* psample = &sample_row[m_channel - 1];
m_max_scaled_data = (m_slope * data_max) + m_intercept;
m_min_scaled_data = (m_slope * data_min) + m_intercept;
- if (g_demean) {
- double dmean = total_data / static_cast<double> wdq.m_nSamples;
+ if (! g_dont_demean) {
+ double dmean = total_data / static_cast<double>(r_wdq.m_nSamples);
int mean = nearest<int>(dmean);
+ std::cout << "Removing mean: " << (dmean * m_slope) + m_intercept <<
+ " " << m_units << std::endl;
+
for (i = 0; i < r_wdq.m_nSamples; i++)
m_data[i] -= mean;
}
if (g_ignore_zero) {
value = (value + data_offset) * data_scale;
value += 0.5 - 32768;
- } else
+ } else {
value = value * data_scale;
+ }
signed short int v = static_cast<signed short int>(value);
#if WORDS_BIG_ENDIAN
projects / wdq2wav.git / blobdiff