libs/ardour/utils.cc

   1 /*
   2     Copyright (C) 2000-2003 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <cstdio> /* for sprintf */
  21 #include <cmath>
  22 #include <cctype>
  23 #include <cstring>
  24 #include <cerrno>
  25 #include <iostream>
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <sys/time.h>
  29 #include <fcntl.h>
  30 #include <unistd.h>
  31
  32 #ifdef HAVE_WORDEXP
  33 #include <wordexp.h>
  34 #endif
  35
  36 #include <pbd/error.h>
  37 #include <pbd/stacktrace.h>
  38 #include <pbd/xml++.h>
  39 #include <pbd/basename.h>
  40 #include <ardour/utils.h>
  41
  42 #include "i18n.h"
  43
  44 using namespace ARDOUR;
  45 using namespace std;
  46 using namespace PBD;
  47 using Glib::ustring;
  48
  49 void
  50 elapsed_time_to_str (char *buf, uint32_t seconds)
  51
  52 {
  53         uint32_t days;
  54         uint32_t hours;
  55         uint32_t minutes;
  56         uint32_t s;
  57
  58         s = seconds;
  59         days = s / (3600 * 24);
  60         s -= (days * 3600 * 24);
  61         hours = s / 3600;
  62         s -= (hours * 3600);
  63         minutes = s / 60;
  64         s -= minutes * 60;
  65
  66         if (days) {
  67                 snprintf (buf, sizeof (buf), "%" PRIu32 " day%s %" PRIu32 " hour%s",
  68                          days,
  69                          days > 1 ? "s" : "",
  70                          hours,
  71                          hours > 1 ? "s" : "");
  72         } else if (hours) {
  73                 snprintf (buf, sizeof (buf), "%" PRIu32 " hour%s %" PRIu32 " minute%s",
  74                          hours,
  75                          hours > 1 ? "s" : "",
  76                          minutes,
  77                          minutes > 1 ? "s" : "");
  78         } else if (minutes) {
  79                 snprintf (buf, sizeof (buf), "%" PRIu32 " minute%s",
  80                          minutes,
  81                          minutes > 1 ? "s" : "");
  82         } else if (s) {
  83                 snprintf (buf, sizeof (buf), "%" PRIu32 " second%s",
  84                          seconds,
  85                          seconds > 1 ? "s" : "");
  86         } else {
  87                 snprintf (buf, sizeof (buf), "no time");
  88         }
  89 }
  90
  91 ustring
  92 legalize_for_path (ustring str)
  93 {
  94         ustring::size_type pos;
  95         ustring legal_chars = "abcdefghijklmnopqrtsuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_+=: ";
  96         ustring legal;
  97
  98         legal = str;
  99         pos = 0;
 100
 101         while ((pos = legal.find_first_not_of (legal_chars, pos)) != string::npos) {
 102                 legal.replace (pos, 1, "_");
 103                 pos += 1;
 104         }
 105
 106         return legal;
 107 }
 108
 109 string bump_name_once(std::string name)
 110 {
 111         string::size_type period;
 112         string newname;
 113
 114         if ((period = name.find_last_of ('.')) == string::npos) {
 115                 newname  = name;
 116                 newname += ".1";
 117         } else {
 118                 int isnumber = 1;
 119                 const char *last_element = name.c_str() + period + 1;
 120                 for (size_t i = 0; i < strlen(last_element); i++) {
 121                         if (!isdigit(last_element[i])) {
 122                                 isnumber = 0;
 123                                 break;
 124                         }
 125                 }
 126
 127                 errno = 0;
 128                 long int version = strtol (name.c_str()+period+1, (char **)NULL, 10);
 129
 130                 if (isnumber == 0 || errno != 0) {
 131                         // last_element is not a number, or is too large
 132                         newname  = name;
 133                         newname += ".1";
 134                 } else {
 135                         char buf[32];
 136
 137                         snprintf (buf, sizeof(buf), "%ld", version+1);
 138
 139                         newname  = name.substr (0, period+1);
 140                         newname += buf;
 141                 }
 142         }
 143
 144         return newname;
 145
 146 }
 147
 148 ostream&
 149 operator<< (ostream& o, const BBT_Time& bbt)
 150 {
 151         o << bbt.bars << '|' << bbt.beats << '|' << bbt.ticks;
 152         return o;
 153 }
 154
 155 XMLNode *
 156 find_named_node (const XMLNode& node, string name)
 157 {
 158         XMLNodeList nlist;
 159         XMLNodeConstIterator niter;
 160         XMLNode* child;
 161
 162         nlist = node.children();
 163
 164         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
 165
 166                 child = *niter;
 167
 168                 if (child->name() == name) {
 169                         return child;
 170                 }
 171         }
 172
 173         return 0;
 174 }
 175
 176 int
 177 cmp_nocase (const string& s, const string& s2)
 178 {
 179         string::const_iterator p = s.begin();
 180         string::const_iterator p2 = s2.begin();
 181
 182         while (p != s.end() && p2 != s2.end()) {
 183                 if (toupper(*p) != toupper(*p2)) {
 184                         return (toupper(*p) < toupper(*p2)) ? -1 : 1;
 185                 }
 186                 ++p;
 187                 ++p2;
 188         }
 189
 190         return (s2.size() == s.size()) ? 0 : (s.size() < s2.size()) ? -1 : 1;
 191 }
 192
 193 int
 194 tokenize_fullpath (string fullpath, string& path, string& name)
 195 {
 196         string::size_type m = fullpath.find_last_of("/");
 197
 198         if (m == string::npos) {
 199                 path = fullpath;
 200                 name = fullpath;
 201                 return 1;
 202         }
 203
 204         // does it look like just a directory?
 205         if (m == fullpath.length()-1) {
 206                 return -1;
 207         }
 208         path = fullpath.substr(0, m+1);
 209
 210         string::size_type n = fullpath.find(".ardour", m);
 211         // no .ardour?
 212         if (n == string::npos) {
 213                 return -1;
 214         }
 215         name = fullpath.substr(m+1, n - m - 1);
 216         return 1;
 217 }
 218
 219 int
 220 touch_file (ustring path)
 221 {
 222         int fd = open (path.c_str(), O_RDWR|O_CREAT, 0660);
 223         if (fd >= 0) {
 224                 close (fd);
 225                 return 0;
 226         }
 227         return 1;
 228 }
 229
 230 ustring
 231 region_name_from_path (ustring path, bool strip_channels, bool add_channel_suffix, uint32_t total, uint32_t this_one)
 232 {
 233         path = PBD::basename_nosuffix (path);
 234
 235         if (strip_channels) {
 236
 237                 /* remove any "?R", "?L" or "?[a-z]" channel identifier */
 238
 239                 ustring::size_type len = path.length();
 240
 241                 if (len > 3 && (path[len-2] == '%' || path[len-2] == '?' || path[len-2] == '.') &&
 242                     (path[len-1] == 'R' || path[len-1] == 'L' || (islower (path[len-1])))) {
 243
 244                         path = path.substr (0, path.length() - 2);
 245                 }
 246         }
 247
 248         if (add_channel_suffix) {
 249
 250                 path += '%';
 251
 252                 if (total > 2) {
 253                         path += (char) ('a' + this_one);
 254                 } else {
 255                         path += (char) (this_one == 0 ? 'L' : 'R');
 256                 }
 257         }
 258
 259         return path;
 260 }
 261
 262 bool
 263 path_is_paired (ustring path, ustring& pair_base)
 264 {
 265         ustring::size_type pos;
 266
 267         /* remove filename suffixes etc. */
 268
 269         if ((pos = path.find_last_of ('.')) != string::npos) {
 270                 path = path.substr (0, pos);
 271         }
 272
 273         ustring::size_type len = path.length();
 274
 275         /* look for possible channel identifier: "?R", "%R", ".L" etc. */
 276
 277         if (len > 3 && (path[len-2] == '%' || path[len-2] == '?' || path[len-2] == '.') &&
 278             (path[len-1] == 'R' || path[len-1] == 'L' || (islower (path[len-1])))) {
 279
 280                 pair_base = path.substr (0, len-2);
 281                 return true;
 282
 283         }
 284
 285         return false;
 286 }
 287
 288 ustring
 289 path_expand (ustring path)
 290 {
 291 #ifdef HAVE_WORDEXP
 292         /* Handle tilde and environment variable expansion in session path */
 293         string ret = path;
 294
 295         wordexp_t expansion;
 296         switch (wordexp (path.c_str(), &expansion, WRDE_NOCMD|WRDE_UNDEF)) {
 297         case 0:
 298                 break;
 299         default:
 300                 error << string_compose (_("illegal or badly-formed string used for path (%1)"), path) << endmsg;
 301                 goto out;
 302         }
 303
 304         if (expansion.we_wordc > 1) {
 305                 error << string_compose (_("path (%1) is ambiguous"), path) << endmsg;
 306                 goto out;
 307         }
 308
 309         ret = expansion.we_wordv[0];
 310   out:
 311         wordfree (&expansion);
 312         return ret;
 313
 314 #else
 315         return path;
 316 #endif
 317 }
 318
 319 #if defined(HAVE_COREAUDIO) || defined(HAVE_AUDIOUNITS)
 320 string
 321 CFStringRefToStdString(CFStringRef stringRef)
 322 {
 323         CFIndex size =
 324                 CFStringGetMaximumSizeForEncoding(CFStringGetLength(stringRef) ,
 325                 kCFStringEncodingUTF8);
 326             char *buf = new char[size];
 327
 328         std::string result;
 329
 330         if(CFStringGetCString(stringRef, buf, size, kCFStringEncodingUTF8)) {
 331             result = buf;
 332         }
 333         delete [] buf;
 334         return result;
 335 }
 336 #endif // HAVE_COREAUDIO
 337
 338 void
 339 compute_equal_power_fades (nframes_t nframes, float* in, float* out)
 340 {
 341         double step;
 342
 343         step = 1.0/(nframes-1);
 344
 345         in[0] = 0.0f;
 346
 347         for (nframes_t i = 1; i < nframes - 1; ++i) {
 348                 in[i] = in[i-1] + step;
 349         }
 350
 351         in[nframes-1] = 1.0;
 352
 353         const float pan_law_attenuation = -3.0f;
 354         const float scale = 2.0f - 4.0f * powf (10.0f,pan_law_attenuation/20.0f);
 355
 356         for (nframes_t n = 0; n < nframes; ++n) {
 357                 float inVal = in[n];
 358                 float outVal = 1 - inVal;
 359                 out[n] = outVal * (scale * outVal + 1.0f - scale);
 360                 in[n] = inVal * (scale * inVal + 1.0f - scale);
 361         }
 362 }
 363
 364 EditMode
 365 string_to_edit_mode (string str)
 366 {
 367         if (str == _("Splice Edit")) {
 368                 return Splice;
 369         } else if (str == _("Slide Edit")) {
 370                 return Slide;
 371         } else if (str == _("Lock Edit")) {
 372                 return Lock;
 373         }
 374         fatal << string_compose (_("programming error: unknown edit mode string \"%1\""), str) << endmsg;
 375         /*NOTREACHED*/
 376         return Slide;
 377 }
 378
 379 const char*
 380 edit_mode_to_string (EditMode mode)
 381 {
 382         switch (mode) {
 383         case Slide:
 384                 return _("Slide Edit");
 385
 386         case Lock:
 387                 return _("Lock Edit");
 388
 389         default:
 390         case Splice:
 391                 return _("Splice Edit");
 392         }
 393 }
 394
 395 SlaveSource
 396 string_to_slave_source (string str)
 397 {
 398         if (str == _("Internal")) {
 399                 return None;
 400         }
 401
 402         if (str == _("MTC")) {
 403                 return MTC;
 404         }
 405
 406         if (str == _("JACK")) {
 407                 return JACK;
 408         }
 409
 410         fatal << string_compose (_("programming error: unknown slave source string \"%1\""), str) << endmsg;
 411         /*NOTREACHED*/
 412         return None;
 413 }
 414
 415 const char*
 416 slave_source_to_string (SlaveSource src)
 417 {
 418         switch (src) {
 419         case JACK:
 420                 return _("JACK");
 421
 422         case MTC:
 423                 return _("MTC");
 424
 425         default:
 426         case None:
 427                 return _("Internal");
 428
 429         }
 430 }
 431
 432 /* I don't really like hard-coding these falloff rates here
 433  * Probably should use a map of some kind that could be configured
 434  * These rates are db/sec.
 435 */
 436
 437 #define METER_FALLOFF_OFF     0.0f
 438 #define METER_FALLOFF_SLOWEST 6.6f // BBC standard
 439 #define METER_FALLOFF_SLOW    8.6f // BBC standard
 440 #define METER_FALLOFF_MEDIUM  20.0f
 441 #define METER_FALLOFF_FAST    32.0f
 442 #define METER_FALLOFF_FASTER  46.0f
 443 #define METER_FALLOFF_FASTEST 70.0f
 444
 445 float
 446 meter_falloff_to_float (MeterFalloff falloff)
 447 {
 448         switch (falloff) {
 449         case MeterFalloffOff:
 450                 return METER_FALLOFF_OFF;
 451         case MeterFalloffSlowest:
 452                 return METER_FALLOFF_SLOWEST;
 453         case MeterFalloffSlow:
 454                 return METER_FALLOFF_SLOW;
 455         case MeterFalloffMedium:
 456                 return METER_FALLOFF_MEDIUM;
 457         case MeterFalloffFast:
 458                 return METER_FALLOFF_FAST;
 459         case MeterFalloffFaster:
 460                 return METER_FALLOFF_FASTER;
 461         case MeterFalloffFastest:
 462                 return METER_FALLOFF_FASTEST;
 463         default:
 464                 return METER_FALLOFF_FAST;
 465         }
 466 }
 467
 468 MeterFalloff
 469 meter_falloff_from_float (float val)
 470 {
 471         if (val == METER_FALLOFF_OFF) {
 472                 return MeterFalloffOff;
 473         }
 474         else if (val <= METER_FALLOFF_SLOWEST) {
 475                 return MeterFalloffSlowest;
 476         }
 477         else if (val <= METER_FALLOFF_SLOW) {
 478                 return MeterFalloffSlow;
 479         }
 480         else if (val <= METER_FALLOFF_MEDIUM) {
 481                 return MeterFalloffMedium;
 482         }
 483         else if (val <= METER_FALLOFF_FAST) {
 484                 return MeterFalloffFast;
 485         }
 486         else if (val <= METER_FALLOFF_FASTER) {
 487                 return MeterFalloffFaster;
 488         }
 489         else {
 490                 return MeterFalloffFastest;
 491         }
 492 }
 493
 494 float
 495 meter_hold_to_float (MeterHold hold)
 496 {
 497         switch (hold) {
 498         case MeterHoldOff:
 499                 return 0.0f;
 500         case MeterHoldShort:
 501                 return 40.0f;
 502         case MeterHoldMedium:
 503                 return 100.0f;
 504         case MeterHoldLong:
 505         default:
 506                 return 200.0f;
 507         }
 508 }
 509
 510 AutoState
 511 ARDOUR::string_to_auto_state (std::string str)
 512 {
 513         if (str == X_("Off")) {
 514                 return Off;
 515         } else if (str == X_("Play")) {
 516                 return Play;
 517         } else if (str == X_("Write")) {
 518                 return Write;
 519         } else if (str == X_("Touch")) {
 520                 return Touch;
 521         }
 522
 523         fatal << string_compose (_("programming error: %1 %2"), "illegal AutoState string: ", str) << endmsg;
 524         /*NOTREACHED*/
 525         return Touch;
 526 }
 527
 528 string
 529 ARDOUR::auto_state_to_string (AutoState as)
 530 {
 531         /* to be used only for XML serialization, no i18n done */
 532
 533         switch (as) {
 534         case Off:
 535                 return X_("Off");
 536                 break;
 537         case Play:
 538                 return X_("Play");
 539                 break;
 540         case Write:
 541                 return X_("Write");
 542                 break;
 543         case Touch:
 544                 return X_("Touch");
 545         }
 546
 547         fatal << string_compose (_("programming error: %1 %2"), "illegal AutoState type: ", as) << endmsg;
 548         /*NOTREACHED*/
 549         return "";
 550 }
 551
 552 AutoStyle
 553 ARDOUR::string_to_auto_style (std::string str)
 554 {
 555         if (str == X_("Absolute")) {
 556                 return Absolute;
 557         } else if (str == X_("Trim")) {
 558                 return Trim;
 559         }
 560
 561         fatal << string_compose (_("programming error: %1 %2"), "illegal AutoStyle string: ", str) << endmsg;
 562         /*NOTREACHED*/
 563         return Trim;
 564 }
 565
 566 string
 567 ARDOUR::auto_style_to_string (AutoStyle as)
 568 {
 569         /* to be used only for XML serialization, no i18n done */
 570
 571         switch (as) {
 572         case Absolute:
 573                 return X_("Absolute");
 574                 break;
 575         case Trim:
 576                 return X_("Trim");
 577                 break;
 578         }
 579
 580         fatal << string_compose (_("programming error: %1 %2"), "illegal AutoStyle type: ", as) << endmsg;
 581         /*NOTREACHED*/
 582         return "";
 583 }
 584
 585 bool
 586 string_is_affirmative (const std::string& str)
 587 {
 588         /* to be used only with XML data - not intended to handle user input */
 589
 590         return str == "1" || str == "y" || str == "Y" || (!g_strncasecmp(str.c_str(), "yes", str.length()));
 591 }
 592
 593 extern "C" {
 594         void c_stacktrace() { stacktrace (cerr); }
 595 }