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 #ifdef WAF_BUILD
  21 #include "libardour-config.h"
  22 #endif
  23
  24 #include <stdint.h>
  25
  26 #include <cstdio> /* for sprintf */
  27 #include <cstring>
  28 #include <cmath>
  29 #include <cctype>
  30 #include <cstring>
  31 #include <cerrno>
  32 #include <iostream>
  33 #include <sys/types.h>
  34 #include <sys/stat.h>
  35 #include <sys/time.h>
  36 #include <fcntl.h>
  37 #include <dirent.h>
  38 #include <errno.h>
  39
  40 #include <glibmm/miscutils.h>
  41 #include <glibmm/fileutils.h>
  42
  43 #ifdef HAVE_WORDEXP
  44 #include <wordexp.h>
  45 #endif
  46
  47 #include "pbd/cpus.h"
  48 #include "pbd/error.h"
  49 #include "pbd/stacktrace.h"
  50 #include "pbd/xml++.h"
  51 #include "pbd/basename.h"
  52 #include "pbd/strsplit.h"
  53
  54 #include "ardour/utils.h"
  55 #include "ardour/rc_configuration.h"
  56
  57 #include "i18n.h"
  58
  59 using namespace ARDOUR;
  60 using namespace std;
  61 using namespace PBD;
  62
  63 string
  64 legalize_for_path (const string& str)
  65 {
  66         string::size_type pos;
  67         string illegal_chars = "/\\"; /* DOS, POSIX. Yes, we're going to ignore HFS */
  68         string legal;
  69
  70         legal = str;
  71         pos = 0;
  72
  73         while ((pos = legal.find_first_of (illegal_chars, pos)) != string::npos) {
  74                 legal.replace (pos, 1, "_");
  75                 pos += 1;
  76         }
  77
  78         return legal;
  79 }
  80
  81 string
  82 bump_name_once (const std::string& name, char delimiter)
  83 {
  84         string::size_type delim;
  85         string newname;
  86
  87         if ((delim = name.find_last_of (delimiter)) == string::npos) {
  88                 newname  = name;
  89                 newname += delimiter;
  90                 newname += "1";
  91         } else {
  92                 int isnumber = 1;
  93                 const char *last_element = name.c_str() + delim + 1;
  94                 for (size_t i = 0; i < strlen(last_element); i++) {
  95                         if (!isdigit(last_element[i])) {
  96                                 isnumber = 0;
  97                                 break;
  98                         }
  99                 }
 100
 101                 errno = 0;
 102                 int32_t version = strtol (name.c_str()+delim+1, (char **)NULL, 10);
 103
 104                 if (isnumber == 0 || errno != 0) {
 105                         // last_element is not a number, or is too large
 106                         newname  = name;
 107                         newname  += delimiter;
 108                         newname += "1";
 109                 } else {
 110                         char buf[32];
 111
 112                         snprintf (buf, sizeof(buf), "%d", version+1);
 113
 114                         newname  = name.substr (0, delim+1);
 115                         newname += buf;
 116                 }
 117         }
 118
 119         return newname;
 120
 121 }
 122
 123 bool
 124 could_be_a_valid_path (const string& path)
 125 {
 126         vector<string> posix_dirs;
 127         vector<string> dos_dirs;
 128         string testpath;
 129
 130         split (path, posix_dirs, '/');
 131         split (path, dos_dirs, '\\');
 132
 133         /* remove the last component of each */
 134
 135         posix_dirs.erase (--posix_dirs.end());
 136         dos_dirs.erase (--dos_dirs.end());
 137
 138         if (G_DIR_SEPARATOR == '/') {
 139                 for (vector<string>::iterator x = posix_dirs.begin(); x != posix_dirs.end(); ++x) {
 140                         testpath = Glib::build_filename (testpath, *x);
 141                         cerr << "Testing " << testpath << endl;
 142                         if (!Glib::file_test (testpath, Glib::FILE_TEST_IS_DIR|Glib::FILE_TEST_EXISTS)) {
 143                                 return false;
 144                         }
 145                 }
 146         }
 147
 148         if (G_DIR_SEPARATOR == '\\') {
 149                 testpath = "";
 150                 for (vector<string>::iterator x = dos_dirs.begin(); x != dos_dirs.end(); ++x) {
 151                         testpath = Glib::build_filename (testpath, *x);
 152                         cerr << "Testing " << testpath << endl;
 153                         if (!Glib::file_test (testpath, Glib::FILE_TEST_IS_DIR|Glib::FILE_TEST_EXISTS)) {
 154                                 return false;
 155                         }
 156                 }
 157         }
 158
 159         return true;
 160 }
 161
 162
 163 XMLNode *
 164 find_named_node (const XMLNode& node, string name)
 165 {
 166         XMLNodeList nlist;
 167         XMLNodeConstIterator niter;
 168         XMLNode* child;
 169
 170         nlist = node.children();
 171
 172         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
 173
 174                 child = *niter;
 175
 176                 if (child->name() == name) {
 177                         return child;
 178                 }
 179         }
 180
 181         return 0;
 182 }
 183
 184 int
 185 cmp_nocase (const string& s, const string& s2)
 186 {
 187         string::const_iterator p = s.begin();
 188         string::const_iterator p2 = s2.begin();
 189
 190         while (p != s.end() && p2 != s2.end()) {
 191                 if (toupper(*p) != toupper(*p2)) {
 192                         return (toupper(*p) < toupper(*p2)) ? -1 : 1;
 193                 }
 194                 ++p;
 195                 ++p2;
 196         }
 197
 198         return (s2.size() == s.size()) ? 0 : (s.size() < s2.size()) ? -1 : 1;
 199 }
 200
 201 int
 202 touch_file (string path)
 203 {
 204         int fd = open (path.c_str(), O_RDWR|O_CREAT, 0660);
 205         if (fd >= 0) {
 206                 close (fd);
 207                 return 0;
 208         }
 209         return 1;
 210 }
 211
 212 string
 213 region_name_from_path (string path, bool strip_channels, bool add_channel_suffix, uint32_t total, uint32_t this_one)
 214 {
 215         path = PBD::basename_nosuffix (path);
 216
 217         if (strip_channels) {
 218
 219                 /* remove any "?R", "?L" or "?[a-z]" channel identifier */
 220
 221                 string::size_type len = path.length();
 222
 223                 if (len > 3 && (path[len-2] == '%' || path[len-2] == '?' || path[len-2] == '.') &&
 224                     (path[len-1] == 'R' || path[len-1] == 'L' || (islower (path[len-1])))) {
 225
 226                         path = path.substr (0, path.length() - 2);
 227                 }
 228         }
 229
 230         if (add_channel_suffix) {
 231
 232                 path += '%';
 233
 234                 if (total > 2) {
 235                         path += (char) ('a' + this_one);
 236                 } else {
 237                         path += (char) (this_one == 0 ? 'L' : 'R');
 238                 }
 239         }
 240
 241         return path;
 242 }
 243
 244 bool
 245 path_is_paired (string path, string& pair_base)
 246 {
 247         string::size_type pos;
 248
 249         /* remove any leading path */
 250
 251         if ((pos = path.find_last_of (G_DIR_SEPARATOR)) != string::npos) {
 252                 path = path.substr(pos+1);
 253         }
 254
 255         /* remove filename suffixes etc. */
 256
 257         if ((pos = path.find_last_of ('.')) != string::npos) {
 258                 path = path.substr (0, pos);
 259         }
 260
 261         string::size_type len = path.length();
 262
 263         /* look for possible channel identifier: "?R", "%R", ".L" etc. */
 264
 265         if (len > 3 && (path[len-2] == '%' || path[len-2] == '?' || path[len-2] == '.') &&
 266             (path[len-1] == 'R' || path[len-1] == 'L' || (islower (path[len-1])))) {
 267
 268                 pair_base = path.substr (0, len-2);
 269                 return true;
 270
 271         }
 272
 273         return false;
 274 }
 275
 276 string
 277 path_expand (string path)
 278 {
 279         if (path.empty()) {
 280                 return path;
 281         }
 282
 283 #ifdef HAVE_WORDEXP
 284         /* Handle tilde and environment variable expansion in session path */
 285         string ret = path;
 286
 287         wordexp_t expansion;
 288         switch (wordexp (path.c_str(), &expansion, WRDE_NOCMD|WRDE_UNDEF)) {
 289         case 0:
 290                 break;
 291         default:
 292                 error << string_compose (_("illegal or badly-formed string used for path (%1)"), path) << endmsg;
 293                 goto out;
 294         }
 295
 296         if (expansion.we_wordc > 1) {
 297                 error << string_compose (_("path (%1) is ambiguous"), path) << endmsg;
 298                 goto out;
 299         }
 300
 301         ret = expansion.we_wordv[0];
 302   out:
 303         wordfree (&expansion);
 304         return ret;
 305
 306 #else
 307         return path;
 308 #endif
 309 }
 310
 311 #if __APPLE__
 312 string
 313 CFStringRefToStdString(CFStringRef stringRef)
 314 {
 315         CFIndex size =
 316                 CFStringGetMaximumSizeForEncoding(CFStringGetLength(stringRef) ,
 317                 kCFStringEncodingUTF8);
 318             char *buf = new char[size];
 319
 320         std::string result;
 321
 322         if(CFStringGetCString(stringRef, buf, size, kCFStringEncodingUTF8)) {
 323             result = buf;
 324         }
 325         delete [] buf;
 326         return result;
 327 }
 328 #endif // __APPLE__
 329
 330 void
 331 compute_equal_power_fades (framecnt_t nframes, float* in, float* out)
 332 {
 333         double step;
 334
 335         step = 1.0/(nframes-1);
 336
 337         in[0] = 0.0f;
 338
 339         for (framecnt_t i = 1; i < nframes - 1; ++i) {
 340                 in[i] = in[i-1] + step;
 341         }
 342
 343         in[nframes-1] = 1.0;
 344
 345         const float pan_law_attenuation = -3.0f;
 346         const float scale = 2.0f - 4.0f * powf (10.0f,pan_law_attenuation/20.0f);
 347
 348         for (framecnt_t n = 0; n < nframes; ++n) {
 349                 float inVal = in[n];
 350                 float outVal = 1 - inVal;
 351                 out[n] = outVal * (scale * outVal + 1.0f - scale);
 352                 in[n] = inVal * (scale * inVal + 1.0f - scale);
 353         }
 354 }
 355
 356 EditMode
 357 string_to_edit_mode (string str)
 358 {
 359         if (str == _("Splice")) {
 360                 return Splice;
 361         } else if (str == _("Slide")) {
 362                 return Slide;
 363         } else if (str == _("Lock")) {
 364                 return Lock;
 365         }
 366         fatal << string_compose (_("programming error: unknown edit mode string \"%1\""), str) << endmsg;
 367         /*NOTREACHED*/
 368         return Slide;
 369 }
 370
 371 const char*
 372 edit_mode_to_string (EditMode mode)
 373 {
 374         switch (mode) {
 375         case Slide:
 376                 return _("Slide");
 377
 378         case Lock:
 379                 return _("Lock");
 380
 381         default:
 382         case Splice:
 383                 return _("Splice");
 384         }
 385 }
 386
 387 SyncSource
 388 string_to_sync_source (string str)
 389 {
 390         if (str == _("MIDI Timecode") || str == _("MTC")) {
 391                 return MTC;
 392         }
 393
 394         if (str == _("MIDI Clock")) {
 395                 return MIDIClock;
 396         }
 397
 398         if (str == _("JACK")) {
 399                 return JACK;
 400         }
 401
 402         fatal << string_compose (_("programming error: unknown sync source string \"%1\""), str) << endmsg;
 403         /*NOTREACHED*/
 404         return JACK;
 405 }
 406
 407 /** @param sh Return a short version of the string */
 408 const char*
 409 sync_source_to_string (SyncSource src, bool sh)
 410 {
 411         switch (src) {
 412         case JACK:
 413                 return _("JACK");
 414
 415         case MTC:
 416                 if (sh) {
 417                         return _("MTC");
 418                 } else {
 419                         return _("MIDI Timecode");
 420                 }
 421
 422         case MIDIClock:
 423                 return _("MIDI Clock");
 424         }
 425         /* GRRRR .... stupid, stupid gcc - you can't get here from there, all enum values are handled */
 426         return _("JACK");
 427 }
 428
 429 float
 430 meter_falloff_to_float (MeterFalloff falloff)
 431 {
 432         switch (falloff) {
 433         case MeterFalloffOff:
 434                 return METER_FALLOFF_OFF;
 435         case MeterFalloffSlowest:
 436                 return METER_FALLOFF_SLOWEST;
 437         case MeterFalloffSlow:
 438                 return METER_FALLOFF_SLOW;
 439         case MeterFalloffMedium:
 440                 return METER_FALLOFF_MEDIUM;
 441         case MeterFalloffFast:
 442                 return METER_FALLOFF_FAST;
 443         case MeterFalloffFaster:
 444                 return METER_FALLOFF_FASTER;
 445         case MeterFalloffFastest:
 446                 return METER_FALLOFF_FASTEST;
 447         default:
 448                 return METER_FALLOFF_FAST;
 449         }
 450 }
 451
 452 MeterFalloff
 453 meter_falloff_from_float (float val)
 454 {
 455         if (val == METER_FALLOFF_OFF) {
 456                 return MeterFalloffOff;
 457         }
 458         else if (val <= METER_FALLOFF_SLOWEST) {
 459                 return MeterFalloffSlowest;
 460         }
 461         else if (val <= METER_FALLOFF_SLOW) {
 462                 return MeterFalloffSlow;
 463         }
 464         else if (val <= METER_FALLOFF_MEDIUM) {
 465                 return MeterFalloffMedium;
 466         }
 467         else if (val <= METER_FALLOFF_FAST) {
 468                 return MeterFalloffFast;
 469         }
 470         else if (val <= METER_FALLOFF_FASTER) {
 471                 return MeterFalloffFaster;
 472         }
 473         else {
 474                 return MeterFalloffFastest;
 475         }
 476 }
 477
 478 AutoState
 479 ARDOUR::string_to_auto_state (std::string str)
 480 {
 481         if (str == X_("Off")) {
 482                 return Off;
 483         } else if (str == X_("Play")) {
 484                 return Play;
 485         } else if (str == X_("Write")) {
 486                 return Write;
 487         } else if (str == X_("Touch")) {
 488                 return Touch;
 489         }
 490
 491         fatal << string_compose (_("programming error: %1 %2"), "illegal AutoState string: ", str) << endmsg;
 492         /*NOTREACHED*/
 493         return Touch;
 494 }
 495
 496 string
 497 ARDOUR::auto_state_to_string (AutoState as)
 498 {
 499         /* to be used only for XML serialization, no i18n done */
 500
 501         switch (as) {
 502         case Off:
 503                 return X_("Off");
 504                 break;
 505         case Play:
 506                 return X_("Play");
 507                 break;
 508         case Write:
 509                 return X_("Write");
 510                 break;
 511         case Touch:
 512                 return X_("Touch");
 513         }
 514
 515         fatal << string_compose (_("programming error: %1 %2"), "illegal AutoState type: ", as) << endmsg;
 516         /*NOTREACHED*/
 517         return "";
 518 }
 519
 520 AutoStyle
 521 ARDOUR::string_to_auto_style (std::string str)
 522 {
 523         if (str == X_("Absolute")) {
 524                 return Absolute;
 525         } else if (str == X_("Trim")) {
 526                 return Trim;
 527         }
 528
 529         fatal << string_compose (_("programming error: %1 %2"), "illegal AutoStyle string: ", str) << endmsg;
 530         /*NOTREACHED*/
 531         return Trim;
 532 }
 533
 534 string
 535 ARDOUR::auto_style_to_string (AutoStyle as)
 536 {
 537         /* to be used only for XML serialization, no i18n done */
 538
 539         switch (as) {
 540         case Absolute:
 541                 return X_("Absolute");
 542                 break;
 543         case Trim:
 544                 return X_("Trim");
 545                 break;
 546         }
 547
 548         fatal << string_compose (_("programming error: %1 %2"), "illegal AutoStyle type: ", as) << endmsg;
 549         /*NOTREACHED*/
 550         return "";
 551 }
 552
 553 std::string
 554 bool_as_string (bool yn)
 555 {
 556         return (yn ? "yes" : "no");
 557 }
 558
 559 bool
 560 string_is_affirmative (const std::string& str)
 561 {
 562         /* to be used only with XML data - not intended to handle user input */
 563
 564         if (str.empty ()) {
 565                 return false;
 566         }
 567
 568         return str == "1" || str == "y" || str == "Y" || (!g_strncasecmp(str.c_str(), "yes", str.length()));
 569 }
 570
 571 const char*
 572 native_header_format_extension (HeaderFormat hf, const DataType& type)
 573 {
 574         if (type == DataType::MIDI) {
 575                 return ".mid";
 576         }
 577
 578         switch (hf) {
 579         case BWF:
 580                 return ".wav";
 581         case WAVE:
 582                 return ".wav";
 583         case WAVE64:
 584                 return ".w64";
 585         case CAF:
 586                 return ".caf";
 587         case AIFF:
 588                 return ".aif";
 589         case iXML:
 590                 return ".ixml";
 591         case RF64:
 592                 return ".rf64";
 593         }
 594
 595         fatal << string_compose (_("programming error: unknown native header format: %1"), hf);
 596         /*NOTREACHED*/
 597         return ".wav";
 598 }
 599
 600 bool
 601 matching_unsuffixed_filename_exists_in (const string& dir, const string& path)
 602 {
 603         string bws = basename_nosuffix (path);
 604         struct dirent* dentry;
 605         struct stat statbuf;
 606         DIR* dead;
 607         bool ret = false;
 608
 609         if ((dead = ::opendir (dir.c_str())) == 0) {
 610                 error << string_compose (_("cannot open directory %1 (%2)"), dir, strerror (errno)) << endl;
 611                 return false;
 612         }
 613
 614         while ((dentry = ::readdir (dead)) != 0) {
 615
 616                 /* avoid '.' and '..' */
 617
 618                 if ((dentry->d_name[0] == '.' && dentry->d_name[1] == '\0') ||
 619                     (dentry->d_name[2] == '\0' && dentry->d_name[0] == '.' && dentry->d_name[1] == '.')) {
 620                         continue;
 621                 }
 622
 623                 string fullpath = Glib::build_filename (dir, dentry->d_name);
 624
 625                 if (::stat (fullpath.c_str(), &statbuf)) {
 626                         continue;
 627                 }
 628
 629                 if (!S_ISREG (statbuf.st_mode)) {
 630                         continue;
 631                 }
 632
 633                 string bws2 = basename_nosuffix (dentry->d_name);
 634
 635                 if (bws2 == bws) {
 636                         ret = true;
 637                         break;
 638                 }
 639         }
 640
 641         ::closedir (dead);
 642         return ret;
 643 }
 644
 645 uint32_t
 646 how_many_dsp_threads ()
 647 {
 648         /* CALLER MUST HOLD PROCESS LOCK */
 649
 650         int num_cpu = hardware_concurrency();
 651         int pu = Config->get_processor_usage ();
 652         uint32_t num_threads = max (num_cpu - 1, 2); // default to number of cpus minus one, or 2, whichever is larger
 653
 654         if (pu < 0) {
 655                 /* pu is negative: use "pu" less cores for DSP than appear to be available
 656                  */
 657
 658                 if (-pu < num_cpu) {
 659                         num_threads = num_cpu + pu;
 660                 }
 661
 662         } else if (pu == 0) {
 663
 664                 /* use all available CPUs
 665                  */
 666
 667                 num_threads = num_cpu;
 668
 669         } else {
 670                 /* use "pu" cores, if available
 671                  */
 672
 673                 num_threads = min (num_cpu, pu);
 674         }
 675
 676         return num_threads;
 677 }
 678
 679 double gain_to_slider_position_with_max (double g, double max_gain)
 680 {
 681         return gain_to_slider_position (g * 2.0/max_gain);
 682 }
 683
 684 double slider_position_to_gain_with_max (double g, double max_gain)
 685 {
 686         return slider_position_to_gain (g * max_gain/2.0);
 687 }
 688
 689 extern "C" {
 690         void c_stacktrace() { stacktrace (cerr); }
 691 }