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 1.24 2003/02/25 18:19:45 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 1.24 2003/02/25 18:19:45 kevin Exp $";
32 bool g_verbose = false;
34 bool g_ignore_zero = false;
35 bool g_demean = false;
44 #define O_BINARY _O_BINARY
45 #define O_RDONLY _O_RDONLY
46 #define O_WRONLY _O_WRONLY
47 #define O_RDWR _O_RDRW
48 #define O_TRUNC _O_TRUNC
49 #define O_CREAT _O_CREAT
50 const int g_fileMode = _S_IWRITE | _S_IREAD;
51 struct fpos_t std::_Fpz = {0,0};
53 const int g_fileMode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
54 // Define as NULL for non-Windows platforms
62 error_msg (const char *msg)
64 std::cerr << msg << "\n";
68 info_msg (const char* msg)
70 std::cout << msg << "\n";
74 info_msg_sans_newline (const char* msg)
80 fileBasename (const char* filename)
82 const char* p = strrchr (filename, '/');
83 return (p ? p + 1 : filename);
87 str_rm_tail (char *str, const char* const charlist)
91 for (i = strlen(str) - 1; i >= 0; i--)
92 if (strchr (charlist, str[i]) != NULL)
95 break; /* found non-specified char, all done */
101 str_wrm_tail (char *str)
103 return (str_rm_tail(str, "\b\t\n\r"));
108 usage (const char* progname)
110 std::cout << "usage: " << fileBasename (progname) << " [OPTIONS] <wdq-file> <channel-number> <wav-file>\n";
111 std::cout << "OPTIONS\n";
112 std::cout << " -p Play channel through audio system\n";
113 std::cout << " -q Supress all messages\n";
114 std::cout << " -z Scale output without regard for windaq zero point\n";
115 std::cout << " -m Demean the data (subtract the mean value from each sample)\n";
116 std::cout << " -v Verbose mode\n";
117 std::cout << " -d Debug mode\n";
118 std::cout << " -r Print program version\n";
119 std::cout << " -h Print this help message\n";
124 main (int argc, char *argv[])
129 const char* progname = argv[0];
131 while ((c = getopt (argc, argv, "rqvzmdph")) != -1) {
134 std::cout << "Version " << g_szIdStr << std::endl;
152 g_ignore_zero = true;
166 std::cerr << "Too many parameters\n";
171 char wdq_fname[MAX_INPUT_STR];
173 strncpy (wdq_fname, argv [0], MAX_INPUT_STR);
175 std::cout << "Enter input WinDAQ filename: ";
176 std::cin.getline (wdq_fname, MAX_INPUT_STR);
179 char channel_buf [MAX_INPUT_STR];
181 strncpy (channel_buf, argv[1], MAX_INPUT_STR);
183 std::cout << "Enter channel number: ";
184 std::cin.getline (channel_buf, MAX_INPUT_STR);
187 char *channel_endptr;
188 int channel = static_cast<int>(strtol (channel_buf, &channel_endptr, 10));
189 if (*channel_endptr != 0) {
190 std::ostringstream os;
191 os << "Error: Channel " << channel_buf << " is not an integer";
192 error_msg (os.str().c_str());
197 char wav_fname[MAX_INPUT_STR];
199 strncpy (wav_fname, argv[2], MAX_INPUT_STR);
201 std::cout << "Enter output wav filename: ";
202 std::cin.getline (wav_fname, MAX_INPUT_STR);
205 if (! wdq2wav (wdq_fname, channel, wav_fname, play))
212 wdq2wav (const char* wdq_fname, const int channel, const char *wav_fname, bool play)
214 WindaqFile wdq (wdq_fname);
216 if (! wdq.ReadHeader()) {
217 if (wdq.m_error.size()) {
218 std::ostringstream os;
219 os << "Error reading file " << wdq_fname << ": " << wdq.m_error.c_str();
220 error_msg (os.str().c_str());
222 std::ostringstream os;
223 os << "Error reading file " << wdq_fname;
224 error_msg (os.str().c_str());
228 if (! g_quiet || g_verbose || g_debug) {
229 std::ostringstream os1;
230 os1 << "File " << wdq_fname;
231 info_msg (os1.str().c_str());
232 std::ostringstream os2;
233 time_t time = wdq.m_time_acq_start;
234 struct tm* tm = gmtime (&time);
235 os2 << " Time File Creation: " << asctime(tm);
236 info_msg_sans_newline (os2.str().c_str());
237 std::ostringstream os3;
238 time = wdq.m_time_acq_stop;
240 os3 << " Time File Written: " << asctime(tm);
241 info_msg_sans_newline (os3.str().c_str());
242 std::ostringstream os4;
243 os4 << " Samples: " << wdq.m_nSamples <<
244 ", Channels: " << wdq.m_nChannels <<
245 ", Sample Rate: " << wdq.m_sample_rate;
246 info_msg (os4.str().c_str());
249 WindaqChannel wdq_channel (wdq, channel);
250 if (! wdq_channel.m_valid) {
251 error_msg ("Error reading data from channel");
255 if (! g_quiet || g_verbose || g_debug) {
256 std::ostringstream os1;
257 os1 << "Channel " << channel;
258 info_msg (os1.str().c_str());
259 std::ostringstream os2;
260 os2 << " Units: " << wdq_channel.m_units.c_str();
261 info_msg (os2.str().c_str());
262 std::ostringstream os3;
263 os3 << " Raw minimum: " << wdq_channel.m_min_raw_data <<
264 ", maximum: " << wdq_channel.m_max_raw_data;
265 info_msg (os3.str().c_str());
269 std::ostringstream os4;
270 os4 << " Scaled minimum: " << wdq_channel.m_min_scaled_data <<
271 ", maximum: " << wdq_channel.m_max_scaled_data;
272 info_msg (os4.str().c_str());
273 std::ostringstream os5;
274 os5 << " Slope " << wdq_channel.m_slope <<
275 ", Intercept " << wdq_channel.m_intercept;
276 info_msg (os5.str().c_str());
279 WavFile wav (wdq_channel, wav_fname);
282 error_msg ("Error extracting wav from channel");
286 if (! wav.WriteFile ()) {
287 error_msg ("Error writing file");
298 WindaqFile::WindaqFile (const char* fname)
299 : m_valid(false), m_fd(0), m_nChannels(0), m_nSamples(0), m_sample_rate(0),
304 WindaqFile::~WindaqFile ()
310 bool read_int2 (int fd, unsigned short int& n)
314 if (read (fd, &tmp1, 1) != 1)
317 if (read (fd, &tmp1, 1) != 1)
320 n = tmp2 + (tmp1 * 256);
324 bool read_int4 (int fd, unsigned int& n)
327 unsigned short int tmp2;
328 if (! read_int2 (fd, tmp2))
331 if (! read_int2 (fd, tmp2))
334 n = tmp4 + (tmp2 * 65536);
339 WindaqFile::ReadHeader ()
341 unsigned short int tmp2;
344 if ((m_fd = open (m_strFile.c_str(), O_RDONLY | O_BINARY)) < 0) {
345 m_error = "Unable to open file";
349 lseek (0, 0, SEEK_SET);
350 if (! read_int2 (m_fd, tmp2))
353 m_nChannels = tmp2 & 0x1f;
354 m_sr_denom = (tmp2 & 0x7fff) >> 5;
355 m_sr_numer = (tmp2 & 0x8000) << 1;
357 if (! read_int2 (m_fd, tmp2))
361 m_sample_rate = (double) m_sr_numer / (double) (m_sr_denom * m_nChannels);
363 if (! read_int2 (m_fd, tmp2))
366 m_channel_offset = tmp2 & 0xFF;
367 m_nBytes_channel_header = tmp2 >> 8;
369 if (! read_int2 (m_fd, m_nHeader_bytes))
372 if (! read_int4 (m_fd, m_nData_bytes))
375 m_nSamples = (m_nData_bytes / m_nChannels) / 2;
377 lseek (m_fd, 36, SEEK_SET);
378 if (! read_int4 (m_fd, m_time_acq_start))
381 if (! read_int4 (m_fd, m_time_acq_stop))
384 // Verify Windaq signature
385 lseek (m_fd, m_nHeader_bytes - 2, SEEK_SET);
386 if (! read_int2 (m_fd, tmp2))
389 if (tmp2 != 0x8001) {
390 std::ostringstream os;
391 m_error = "File is not a valid WinDAQ file";
400 WindaqChannel::WindaqChannel (WindaqFile& wdq, const int channel)
401 : r_wdq(wdq), m_data(0), m_slope(0), m_intercept (0), m_channel(channel),
405 if (channel >= 1 && channel <= wdq.m_nChannels) {
406 if (read_channel_data())
409 std::ostringstream os;
410 os << "Channel " << channel << " is invalid, valid range 1-" <<
412 error_msg (os.str().c_str());
417 WindaqChannel::~WindaqChannel ()
423 bool get_float8 (int fd, double& f)
425 unsigned char buf[8];
426 if (read (fd, &buf, 8) != 8)
431 c = buf[0]; buf[0] = buf[7]; buf[7] = c;
432 c = buf[1]; buf[1] = buf[6]; buf[6] = c;
433 c = buf[2]; buf[2] = buf[5]; buf[5] = c;
434 c = buf[3]; buf[3] = buf[4]; buf[4] = c;
437 f = *(reinterpret_cast<double*>(buf));
444 WindaqChannel::read_channel_data ()
448 m_data = new signed short int [r_wdq.m_nSamples * 2];
450 lseek (fd, r_wdq.m_channel_offset + 8 +
451 (m_channel - 1) * r_wdq.m_nBytes_channel_header,
453 if (! get_float8 (fd, m_slope))
456 if (! get_float8 (fd, m_intercept))
461 if (read (fd, units, 6) != 6) {
462 error_msg ("Error reading file");
467 long int row_bytes = 2 * r_wdq.m_nChannels;
468 signed short int *sample_row = new signed short int [row_bytes];
470 signed short int* psample = &sample_row[m_channel - 1];
472 lseek (fd, r_wdq.m_nHeader_bytes, SEEK_SET);
474 signed short int data_max = 0, data_min = 0;
475 double total_data = 0;
476 for (i = 0; i < r_wdq.m_nSamples; i++) {
477 if (read (fd, sample_row, row_bytes) != row_bytes) {
478 std::ostringstream os;
479 os << "Error reading file at " << i;
480 error_msg (os.str().c_str());
484 signed short int v = *psample;
487 unsigned char* p = reinterpret_cast<unsigned char*>(&v);
488 unsigned char c = p[0]; p[0] = p[1]; p[1] = c;
491 signed short int value = v >> 2;
499 if (value > data_max)
501 else if (value < data_min)
506 m_max_raw_data = data_max;
507 m_min_raw_data = data_min;
508 m_max_scaled_data = (m_slope * data_max) + m_intercept;
509 m_min_scaled_data = (m_slope * data_min) + m_intercept;
512 double dmean = total_data / static_cast<double>(r_wdq.m_nSamples);
513 int mean = nearest<int>(dmean);
514 for (i = 0; i < r_wdq.m_nSamples; i++)
523 WavFile::WavFile (WindaqChannel& wdq_channel, const char* fname)
524 : m_valid(false), m_data(0), m_nSamples(0), m_strFile(fname), m_fd(0)
526 if (wdq_channel.m_valid) {
527 m_nSamples = wdq_channel.r_wdq.m_nSamples;
529 m_nBitsPerSample = 16;
530 m_nBytesPerSample = 2;
531 m_rate = wdq_channel.r_wdq.m_sample_rate;
533 double data_offset = 0, data_scale = 0;
535 data_offset = -wdq_channel.m_min_scaled_data;
536 if (wdq_channel.m_max_scaled_data != wdq_channel.m_min_scaled_data)
537 data_scale = 65535. / (wdq_channel.m_max_scaled_data -
538 wdq_channel.m_min_scaled_data);
540 double max_value = fabs(wdq_channel.m_max_scaled_data);
541 if (fabs (wdq_channel.m_min_scaled_data) > max_value)
542 max_value = fabs (wdq_channel.m_min_scaled_data);
544 data_scale = 32767. / max_value;
548 std::ostringstream os;
549 os << " Wav data_scale: " << data_scale << ", data_offset: " << data_offset;
550 info_msg (os.str().c_str());
554 m_nDataBytes = m_nSamples * m_nBytesPerSample * m_nChannels;
555 m_nFileBytes = m_nHeaderBytes + m_nDataBytes;
557 unsigned int nHeaderShortInts = m_nHeaderBytes / sizeof(signed short int);
559 m_data = new signed short int [m_nSamples + nHeaderShortInts];
560 signed short int* input = wdq_channel.m_data;
561 signed short int* output = &m_data[nHeaderShortInts];
562 double slope = wdq_channel.m_slope;
563 double intercept = wdq_channel.m_intercept;
565 if (! fill_header ())
569 for (i = 0; i < m_nSamples; i++) {
570 double value = input[i];
571 value = (slope * value) + intercept;
573 value = (value + data_offset) * data_scale;
574 value += 0.5 - 32768;
576 value = value * data_scale;
578 signed short int v = static_cast<signed short int>(value);
580 unsigned char* p = reinterpret_cast<unsigned char*>(&v);
581 unsigned char c = p[0]; p[0] = p[1]; p[1] = c;
601 put_int4 (char* p, unsigned int n)
604 *(p+1) = 0xFF & (n >> 8);
605 *(p+2) = 0xFF & (n >> 16);
606 *(p+3) = 0xFF & (n >> 24);
610 put_int2 (char* p, unsigned short int n)
613 *(p+1) = 0xFF & (n >> 8);
617 WavFile::fill_header ()
619 char* pData = reinterpret_cast<char*> (m_data);
621 strncpy (pData, "RIFF", 4);
623 // Length of file after 8 byte header
624 put_int4 (pData + 4, 36 + m_nDataBytes);
626 strncpy (pData + 8, "WAVEfmt ", 8);
628 // Length of header block
629 put_int4 (pData + 16, 0x10);
632 put_int2 (pData + 20, 1);
634 /* Number of channels */
635 put_int2 (pData + 22, m_nChannels);
638 put_int4 (pData + 24, static_cast<int> (m_rate + 0.5));
641 put_int4 (pData + 28, static_cast<int> (m_rate * m_nBytesPerSample + 0.5));
644 put_int2 (pData + 32, m_nBytesPerSample * m_nChannels);
647 put_int2 (pData + 34, m_nBitsPerSample);
649 strncpy (pData + 36, "data", 4);
651 put_int4 (pData + 40, m_nDataBytes);
657 WavFile::WriteFile ()
663 if ((m_fd = open (m_strFile.c_str(), O_WRONLY | O_BINARY | O_TRUNC | O_CREAT, g_fileMode)) == 0) {
664 std::ostringstream os;
665 os << "Error opening output file " << m_strFile.c_str();
666 error_msg (os.str().c_str());
670 lseek (m_fd, 0, SEEK_SET);
671 if (write (m_fd, m_data, m_nFileBytes) != m_nFileBytes) {
672 error_msg ("Error writing file");
676 if (close (m_fd) < 0)
677 error_msg ("Error closing output file");
685 #include <mmsystem.h>
687 #include <sys/ioctl.h>
688 #include <sys/soundcard.h>
695 if (PlaySound ((LPCSTR) m_data, 0, SND_MEMORY | SND_NODEFAULT))
699 if ((fd = open ("/dev/dsp",O_WRONLY)) == -1) {
700 error_msg ("Error opening /dev/dsp");
704 int format = AFMT_S16_LE;
705 if (ioctl (fd, SNDCTL_DSP_SETFMT, &format) == -1) {
706 error_msg ("Error setting DSP format");
707 close(fd); return false;
709 if (format != AFMT_S16_LE) {
710 error_msg ("DSP Format not set");
711 close(fd); return false;
714 unsigned int channels = m_nChannels;
715 if (ioctl (fd, SNDCTL_DSP_CHANNELS, &format) == -1) {
716 error_msg ("Error setting number of channels");
717 close(fd); return false;
719 if (channels != m_nChannels) {
720 error_msg ("Number of channels not set");
721 close(fd); return false;
724 unsigned int speed = static_cast<int>(m_rate + 0.5);
725 if (ioctl (fd, SNDCTL_DSP_SPEED, &speed) == -1) {
726 error_msg ("Error setting sample rate");
727 close(fd); return false;
729 if (speed != m_rate && ! g_quiet) {
730 std::ostringstream os;
731 os << "Warning: Sample rate set to " << speed << ", not " << m_rate;
732 error_msg (os.str().c_str());
735 if (write (fd, reinterpret_cast<char*>(m_data) + m_nHeaderBytes, m_nDataBytes) !=
737 error_msg ("Error writing audio samples");
738 close(fd); return false;