1 /*****************************************************************************
5 ** Purpose: Converts a channel of WinDAQ file to .WAV format
6 ** Programmer: Kevin Rosenberg <kevin@rosenberg.net>
7 ** Date Started: Jan 2003
9 ** Copyright (c) 2003 Kevin Rosenberg
11 ** $Id: wdq2wav.cpp,v 1.10 2003/01/21 11:23:09 kevin Exp $
13 ** This program is free software; you can redistribute it and/or modify
14 ** it under the terms of the GNU General Public License (version 2) as
15 ** published by the Free Software Foundation.
17 ** This program is distributed in the hope that it will be useful,
18 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ** GNU General Public License for more details.
22 ** You should have received a copy of the GNU General Public License
23 ** along with this program; if not, write to the Free Software
24 ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 ******************************************************************************/
29 const char* g_szIdStr = "$Id: wdq2wav.cpp,v 1.10 2003/01/21 11:23:09 kevin Exp $";
32 bool g_verbose = false;
36 error_msg (const char *msg)
38 std::cerr << msg << "\n";
42 info_msg (const char* msg)
44 std::cout << msg << "\n";
48 info_msg_sans_newline (const char* msg)
54 fileBasename (const char* filename)
56 const char* p = strrchr (filename, '/');
57 return (p ? p + 1 : filename);
61 str_rm_tail (char *str, const char* const charlist)
65 for (i = strlen(str) - 1; i >= 0; i--)
66 if (strchr (charlist, str[i]) != NULL)
69 break; /* found non-specified char, all done */
75 str_wrm_tail (char *str)
77 return (str_rm_tail(str, "\b\t\n\r"));
82 usage (const char* progname)
84 std::cout << "usage: " << fileBasename (progname) << " [OPTIONS] <wdq-file> <channel-number> <wav-file>\n";
85 std::cout << "OPTIONS\n";
86 std::cout << " -p Play channel through audio system\n";
87 std::cout << " -q Supress all messages\n";
88 std::cout << " -v Verbose mode\n";
89 std::cout << " -d Debug mode\n";
90 std::cout << " -r Print program version\n";
91 std::cout << " -h Print this help message\n";
96 main (int argc, char *argv[])
101 while ((c = getopt (argc, argv, "rqvdph")) != -1) {
104 std::cout << "Version " << g_szIdStr << std::endl;
130 std::cerr << "Too many parameters\n";
135 char wdq_fname[MAX_INPUT_STR];
137 strncpy (wdq_fname, argv [1], MAX_INPUT_STR);
139 std::cout << "Enter input WinDAQ filename: ";
140 std::cin.getline (wdq_fname, MAX_INPUT_STR);
143 char channel_buf [MAX_INPUT_STR];
145 strncpy (channel_buf, argv[2], MAX_INPUT_STR);
147 std::cout << "Enter channel number: ";
148 std::cin.getline (channel_buf, MAX_INPUT_STR);
151 char *channel_endptr;
152 int channel = static_cast<int>(strtol (channel_buf, &channel_endptr, 10));
153 if (*channel_endptr != 0) {
154 std::ostringstream os;
155 os << "Error: Channel " << channel_buf << " is not an integer";
156 error_msg (os.str().c_str());
161 char wav_fname[MAX_INPUT_STR];
163 strncpy (wav_fname, argv[3], MAX_INPUT_STR);
165 std::cout << "Enter output wav filename: ";
166 std::cin.getline (wav_fname, MAX_INPUT_STR);
169 if (! wdq2wav (wdq_fname, channel, wav_fname))
176 wdq2wav (const char* wdq_fname, const int channel, const char *wav_fname)
178 WindaqFile wdq (wdq_fname);
180 if (! wdq.ReadHeader()) {
181 if (wdq.m_error.size()) {
182 std::ostringstream os;
183 os << "Error reading file " << wdq_fname << ": " << wdq.m_error.c_str();
184 error_msg (os.str().c_str());
186 std::ostringstream os;
187 os << "Error reading file " << wdq_fname;
188 error_msg (os.str().c_str());
192 if (! g_quiet || g_verbose || g_debug) {
193 std::ostringstream os1;
194 os1 << "File " << wdq_fname;
195 info_msg (os1.str().c_str());
196 std::ostringstream os2;
197 time_t time = wdq.m_time_acq_start;
198 struct tm* tm = gmtime (&time);
199 os2 << " Time File Creation: " << asctime(tm);
200 info_msg_sans_newline (os2.str().c_str());
201 std::ostringstream os3;
202 time = wdq.m_time_acq_stop;
204 os3 << " Time File Written: " << asctime(tm);
205 info_msg_sans_newline (os3.str().c_str());
206 std::ostringstream os4;
207 os4 << " Samples: " << wdq.m_nSamples <<
208 ", Channels: " << wdq.m_nChannels <<
209 ", Sample Rate: " << wdq.m_sample_rate;
210 info_msg (os4.str().c_str());
213 WindaqChannel wdq_channel (wdq, channel);
214 if (! wdq_channel.m_valid) {
215 error_msg ("Error reading data from channel");
219 if (! g_quiet || g_verbose || g_debug) {
220 std::ostringstream os1;
221 os1 << "Channel " << channel;
222 info_msg (os1.str().c_str());
223 std::ostringstream os2;
224 os2 << " Units: " << wdq_channel.m_units.c_str();
225 info_msg (os2.str().c_str());
226 std::ostringstream os3;
227 os3 << " Raw minimum: " << wdq_channel.m_min_raw_data <<
228 ", maximum: " << wdq_channel.m_max_raw_data;
229 info_msg (os3.str().c_str());
232 std::ostringstream os4;
233 os4 << " Scaled minimum: " << wdq_channel.m_min_scaled_data <<
234 ", maximum: " << wdq_channel.m_max_scaled_data;
235 info_msg (os4.str().c_str());
236 std::ostringstream os5;
237 os5 << " Slope " << wdq_channel.m_slope <<
238 ", Intercept " << wdq_channel.m_intercept;
239 info_msg (os5.str().c_str());
242 WavFile wav (wdq_channel, wav_fname);
245 error_msg ("Error extracting wav from channel");
249 if (! wav.WriteFile ()) {
250 error_msg ("Error writing file");
258 WindaqFile::WindaqFile (const char* fname)
259 : m_fd(0), m_nChannels(0), m_nSamples(0), m_sample_rate(0), m_valid(false),
264 WindaqFile::~WindaqFile ()
270 bool read_int2 (int fd, unsigned short int& n)
274 if (read (fd, &tmp1, 1) != 1)
277 if (read (fd, &tmp1, 1) != 1)
279 n = tmp2 + (tmp1 * 256);
282 bool read_int4 (int fd, unsigned int& n)
285 unsigned short int tmp2;
286 if (! read_int2 (fd, tmp2))
289 if (! read_int2 (fd, tmp2))
291 n = tmp4 + (tmp2 * 65536);
295 WindaqFile::ReadHeader ()
297 unsigned short int tmp2;
300 if ((m_fd = open (m_strFile.c_str(), O_RDONLY)) < 0) {
301 m_error = "Unable to open file";
305 lseek (0, 0, SEEK_SET);
306 if (! read_int2 (m_fd, tmp2))
309 m_nChannels = tmp2 & 0x1f;
310 m_sr_denom = (tmp2 & 0x7fff) >> 5;
311 m_sr_numer = (tmp2 & 0x8000) << 1;
313 if (! read_int2 (m_fd, tmp2))
317 m_sample_rate = (double) m_sr_numer / (double) (m_sr_denom * m_nChannels);
319 if (! read_int2 (m_fd, tmp2))
322 m_channel_offset = tmp2 & 0xFF;
323 m_nBytes_channel_header = tmp2 >> 8;
325 if (! read_int2 (m_fd, m_nHeader_bytes))
328 if (! read_int4 (m_fd, m_nData_bytes))
331 m_nSamples = (m_nData_bytes / m_nChannels) / 2;
333 lseek (m_fd, 36, SEEK_SET);
334 if (! read_int4 (m_fd, m_time_acq_start))
337 if (! read_int4 (m_fd, m_time_acq_stop))
340 // Verify Windaq signature
341 lseek (m_fd, m_nHeader_bytes - 2, SEEK_SET);
342 if (! read_int2 (m_fd, tmp2))
345 if (tmp2 != 0x8001) {
346 std::ostringstream os;
347 m_error = "File is not a valid WinDAQ file";
356 WindaqChannel::WindaqChannel (WindaqFile& wdq, const int channel)
357 : r_wdq(wdq), m_data(0), m_slope(0), m_intercept (0), m_channel(channel),
361 if (channel >= 1 && channel <= wdq.m_nChannels) {
365 std::ostringstream os;
366 os << "Channel " << channel << " is invalid, valid range 1-" <<
368 error_msg (os.str().c_str());
373 WindaqChannel::~WindaqChannel ()
379 bool get_float8 (int fd, double& f)
381 unsigned char buf[8];
382 if (read (fd, &buf, 8) != 8)
387 c = buf[0]; buf[0] = buf[7]; buf[7] = c;
388 c = buf[1]; buf[1] = buf[6]; buf[6] = c;
389 c = buf[2]; buf[2] = buf[5]; buf[5] = c;
390 c = buf[3]; buf[3] = buf[4]; buf[4] = c;
393 double* p = reinterpret_cast<double*>(buf);
398 WindaqChannel::read_channel_data ()
400 unsigned short int tmp2;
409 m_data = new signed short int [r_wdq.m_nSamples * 2];
411 lseek (fd, r_wdq.m_channel_offset + 8 +
412 (m_channel - 1) * r_wdq.m_nBytes_channel_header,
414 if (! get_float8 (fd, m_slope))
417 if (get_float8 (fd, m_intercept))
422 if (read (fd, units, 6) != 6) {
423 error_msg ("Error reading file");
428 unsigned int row_bytes = 2 * r_wdq.m_nChannels;
429 signed short int sample_row [row_bytes];
431 signed short int* psample = &sample_row[m_channel - 1];
433 lseek (fd, r_wdq.m_nHeader_bytes, SEEK_SET);
435 signed short int data_max, data_min;
436 for (i = 0; i < r_wdq.m_nSamples; i++) {
437 if (read (fd, sample_row, row_bytes) != row_bytes) {
438 std::ostringstream os;
439 os << "Error reading file at " << i;
440 error_msg (os.str().c_str());
443 signed short int v = *psample;
446 unsigned char* p = reinterpret_cast<unsigned char*>(&v);
447 unsigned char c = p[0]; p[0] = p[1]; p[1] = c;
450 signed short int value = v >> 2;
457 if (value > data_max)
459 else if (value < data_min)
464 m_max_raw_data = data_max;
465 m_min_raw_data = data_min;
466 m_max_scaled_data = (m_slope * data_max) + m_intercept;
467 m_min_scaled_data = (m_slope * data_min) + m_intercept;
473 WavFile::WavFile (WindaqChannel& wdq_channel, const char* fname)
474 : m_valid(false), m_data(0), m_nSamples(0), m_strFile(fname), m_fd(0)
476 if (wdq_channel.m_valid) {
477 m_nSamples = wdq_channel.r_wdq.m_nSamples;
479 m_nBitsPerSample = 16;
480 m_nBytesPerSample = 2;
481 m_rate = wdq_channel.r_wdq.m_sample_rate;
483 double data_offset = -wdq_channel.m_min_scaled_data;
484 double data_scale = 0.;
485 if (wdq_channel.m_max_scaled_data != wdq_channel.m_min_scaled_data)
486 data_scale = 65535. / (wdq_channel.m_max_scaled_data -
487 wdq_channel.m_min_scaled_data);
490 std::ostringstream os;
491 os << " Wav data_scale: " << data_scale << ", data_offset: " << data_offset;
492 info_msg (os.str().c_str());
495 unsigned int nHeaderBytes = 44;
496 m_nFileBytes = nHeaderBytes + m_nSamples * m_nBytesPerSample;
498 unsigned int nHeaderShortInts = nHeaderBytes / sizeof(signed short int);
500 m_data = new signed short int [m_nSamples + nHeaderShortInts];
501 signed short int* input = wdq_channel.m_data;
502 signed short int* output = &m_data[nHeaderShortInts];
503 double slope = wdq_channel.m_slope;
504 double intercept = wdq_channel.m_intercept;
506 if (! fill_header ())
510 for (i = 0; i < m_nSamples; i++) {
511 double value = input[i];
512 value = (slope * value) + intercept;
513 value = (value + data_offset) * data_scale;
514 value += 0.5 - 32768;
515 signed short int v = static_cast<signed short int>(value);
517 unsigned char* p = reinterpret_cast<unsigned char*>(&v);
518 unsigned char c = p[0]; p[0] = p[1]; p[1] = c;
538 put_int4 (char* p, unsigned int n)
541 *(p+1) = 0xFF & (n >> 8);
542 *(p+2) = 0xFF & (n >> 16);
543 *(p+3) = 0xFF & (n >> 24);
547 put_int2 (char* p, unsigned short int n)
550 *(p+1) = 0xFF & (n >> 8);
554 WavFile::fill_header ()
556 char* pData = reinterpret_cast<char*> (m_data);
557 unsigned long data_bytes = m_nSamples * m_nBytesPerSample * m_nChannels;
559 strncpy (pData, "RIFF", 4);
561 // Length of file after 8 byte header
562 put_int4 (pData + 4, 36 + data_bytes);
564 strncpy (pData + 8, "WAVEfmt ", 8);
566 // Length of header block
567 put_int4 (pData + 16, 0x10);
570 put_int2 (pData + 20, 1);
572 /* Number of channels */
573 put_int2 (pData + 22, m_nChannels);
576 put_int4 (pData + 24, static_cast<int> (m_rate + 0.5));
579 put_int4 (pData + 28, static_cast<int> (m_rate * m_nBytesPerSample + 0.5));
582 put_int2 (pData + 32, m_nBytesPerSample * m_nChannels);
585 put_int2 (pData + 34, m_nBitsPerSample);
587 strncpy (pData + 36, "data", 4);
589 put_int4 (pData + 40, data_bytes);
595 WavFile::WriteFile ()
597 unsigned short int tmp2;
604 if ((m_fd = open (m_strFile.c_str(), O_WRONLY | O_TRUNC | O_CREAT,
605 S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) == 0) {
606 std::ostringstream os;
607 os << "Error opening output file " << m_strFile.c_str();
608 error_msg (os.str().c_str());
612 lseek (m_fd, 0, SEEK_SET);
613 if (write (m_fd, m_data, m_nFileBytes) != m_nFileBytes) {
614 error_msg ("Error writing file");
618 if (close (m_fd) < 0)
619 error_msg ("Error closing output file");