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 #define __STDC_FORMAT_MACROS 1
  25 #include <stdint.h>
  26
  27 #include <cstdio> /* for sprintf */
  28 #include <cstring>
  29 #include <cmath>
  30 #include <cctype>
  31 #include <cstring>
  32 #include <cerrno>
  33 #include <iostream>
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <sys/time.h>
  37 #include <fcntl.h>
  38 #include <dirent.h>
  39 #include <errno.h>
  40
  41 #include <glibmm/miscutils.h>
  42
  43 #ifdef HAVE_WORDEXP
  44 #include <wordexp.h>
  45 #endif
  46
  47 #include "pbd/error.h"
  48 #include "pbd/stacktrace.h"
  49 #include "pbd/xml++.h"
  50 #include "pbd/basename.h"
  51 #include "ardour/utils.h"
  52
  53 #include "i18n.h"
  54
  55 using namespace ARDOUR;
  56 using namespace std;
  57 using namespace PBD;
  58 using Glib::ustring;
  59
  60 ustring
  61 legalize_for_path (ustring str)
  62 {
  63         ustring::size_type pos;
  64         ustring legal_chars = "abcdefghijklmnopqrtsuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_+=: ";
  65         ustring legal;
  66
  67         legal = str;
  68         pos = 0;
  69
  70         while ((pos = legal.find_first_not_of (legal_chars, pos)) != string::npos) {
  71                 legal.replace (pos, 1, "_");
  72                 pos += 1;
  73         }
  74
  75         return legal;
  76 }
  77
  78 string
  79 bump_name_once (const std::string& name, char delimiter)
  80 {
  81         string::size_type delim;
  82         string newname;
  83
  84         if ((delim = name.find_last_of (delimiter)) == string::npos) {
  85                 newname  = name;
  86                 newname += delimiter;
  87                 newname += "1";
  88         } else {
  89                 int isnumber = 1;
  90                 const char *last_element = name.c_str() + delim + 1;
  91                 for (size_t i = 0; i < strlen(last_element); i++) {
  92                         if (!isdigit(last_element[i])) {
  93                                 isnumber = 0;
  94                                 break;
  95                         }
  96                 }
  97
  98                 errno = 0;
  99                 int32_t version = strtol (name.c_str()+delim+1, (char **)NULL, 10);
 100
 101                 if (isnumber == 0 || errno != 0) {
 102                         // last_element is not a number, or is too large
 103                         newname  = name;
 104                         newname  += delimiter;
 105                         newname += "1";
 106                 } else {
 107                         char buf[32];
 108
 109                         snprintf (buf, sizeof(buf), "%d", version+1);
 110
 111                         newname  = name.substr (0, delim+1);
 112                         newname += buf;
 113                 }
 114         }
 115
 116         return newname;
 117
 118 }
 119
 120 XMLNode *
 121 find_named_node (const XMLNode& node, string name)
 122 {
 123         XMLNodeList nlist;
 124         XMLNodeConstIterator niter;
 125         XMLNode* child;
 126
 127         nlist = node.children();
 128
 129         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
 130
 131                 child = *niter;
 132
 133                 if (child->name() == name) {
 134                         return child;
 135                 }
 136         }
 137
 138         return 0;
 139 }
 140
 141 int
 142 cmp_nocase (const string& s, const string& s2)
 143 {
 144         string::const_iterator p = s.begin();
 145         string::const_iterator p2 = s2.begin();
 146
 147         while (p != s.end() && p2 != s2.end()) {
 148                 if (toupper(*p) != toupper(*p2)) {
 149                         return (toupper(*p) < toupper(*p2)) ? -1 : 1;
 150                 }
 151                 ++p;
 152                 ++p2;
 153         }
 154
 155         return (s2.size() == s.size()) ? 0 : (s.size() < s2.size()) ? -1 : 1;
 156 }
 157
 158 int
 159 touch_file (ustring path)
 160 {
 161         int fd = open (path.c_str(), O_RDWR|O_CREAT, 0660);
 162         if (fd >= 0) {
 163                 close (fd);
 164                 return 0;
 165         }
 166         return 1;
 167 }
 168
 169 ustring
 170 region_name_from_path (ustring path, bool strip_channels, bool add_channel_suffix, uint32_t total, uint32_t this_one)
 171 {
 172         path = PBD::basename_nosuffix (path);
 173
 174         if (strip_channels) {
 175
 176                 /* remove any "?R", "?L" or "?[a-z]" channel identifier */
 177
 178                 ustring::size_type len = path.length();
 179
 180                 if (len > 3 && (path[len-2] == '%' || path[len-2] == '?' || path[len-2] == '.') &&
 181                     (path[len-1] == 'R' || path[len-1] == 'L' || (islower (path[len-1])))) {
 182
 183                         path = path.substr (0, path.length() - 2);
 184                 }
 185         }
 186
 187         if (add_channel_suffix) {
 188
 189                 path += '%';
 190
 191                 if (total > 2) {
 192                         path += (char) ('a' + this_one);
 193                 } else {
 194                         path += (char) (this_one == 0 ? 'L' : 'R');
 195                 }
 196         }
 197
 198         return path;
 199 }
 200
 201 bool
 202 path_is_paired (ustring path, ustring& pair_base)
 203 {
 204         ustring::size_type pos;
 205
 206         /* remove any leading path */
 207
 208         if ((pos = path.find_last_of ('/')) != string::npos) {
 209                 path = path.substr(pos+1);
 210         }
 211
 212         /* remove filename suffixes etc. */
 213
 214         if ((pos = path.find_last_of ('.')) != string::npos) {
 215                 path = path.substr (0, pos);
 216         }
 217
 218         ustring::size_type len = path.length();
 219
 220         /* look for possible channel identifier: "?R", "%R", ".L" etc. */
 221
 222         if (len > 3 && (path[len-2] == '%' || path[len-2] == '?' || path[len-2] == '.') &&
 223             (path[len-1] == 'R' || path[len-1] == 'L' || (islower (path[len-1])))) {
 224
 225                 pair_base = path.substr (0, len-2);
 226                 return true;
 227
 228         }
 229
 230         return false;
 231 }
 232
 233 ustring
 234 path_expand (ustring path)
 235 {
 236 #ifdef HAVE_WORDEXP
 237         /* Handle tilde and environment variable expansion in session path */
 238         string ret = path;
 239
 240         wordexp_t expansion;
 241         switch (wordexp (path.c_str(), &expansion, WRDE_NOCMD|WRDE_UNDEF)) {
 242         case 0:
 243                 break;
 244         default:
 245                 error << string_compose (_("illegal or badly-formed string used for path (%1)"), path) << endmsg;
 246                 goto out;
 247         }
 248
 249         if (expansion.we_wordc > 1) {
 250                 error << string_compose (_("path (%1) is ambiguous"), path) << endmsg;
 251                 goto out;
 252         }
 253
 254         ret = expansion.we_wordv[0];
 255   out:
 256         wordfree (&expansion);
 257         return ret;
 258
 259 #else
 260         return path;
 261 #endif
 262 }
 263
 264 #if defined(HAVE_COREAUDIO) || defined(HAVE_AUDIOUNITS)
 265 string
 266 CFStringRefToStdString(CFStringRef stringRef)
 267 {
 268         CFIndex size =
 269                 CFStringGetMaximumSizeForEncoding(CFStringGetLength(stringRef) ,
 270                 kCFStringEncodingUTF8);
 271             char *buf = new char[size];
 272
 273         std::string result;
 274
 275         if(CFStringGetCString(stringRef, buf, size, kCFStringEncodingUTF8)) {
 276             result = buf;
 277         }
 278         delete [] buf;
 279         return result;
 280 }
 281 #endif // HAVE_COREAUDIO
 282
 283 void
 284 compute_equal_power_fades (nframes_t nframes, float* in, float* out)
 285 {
 286         double step;
 287
 288         step = 1.0/(nframes-1);
 289
 290         in[0] = 0.0f;
 291
 292         for (nframes_t i = 1; i < nframes - 1; ++i) {
 293                 in[i] = in[i-1] + step;
 294         }
 295
 296         in[nframes-1] = 1.0;
 297
 298         const float pan_law_attenuation = -3.0f;
 299         const float scale = 2.0f - 4.0f * powf (10.0f,pan_law_attenuation/20.0f);
 300
 301         for (nframes_t n = 0; n < nframes; ++n) {
 302                 float inVal = in[n];
 303                 float outVal = 1 - inVal;
 304                 out[n] = outVal * (scale * outVal + 1.0f - scale);
 305                 in[n] = inVal * (scale * inVal + 1.0f - scale);
 306         }
 307 }
 308
 309 EditMode
 310 string_to_edit_mode (string str)
 311 {
 312         if (str == _("Splice Edit")) {
 313                 return Splice;
 314         } else if (str == _("Slide Edit")) {
 315                 return Slide;
 316         } else if (str == _("Lock Edit")) {
 317                 return Lock;
 318         }
 319         fatal << string_compose (_("programming error: unknown edit mode string \"%1\""), str) << endmsg;
 320         /*NOTREACHED*/
 321         return Slide;
 322 }
 323
 324 const char*
 325 edit_mode_to_string (EditMode mode)
 326 {
 327         switch (mode) {
 328         case Slide:
 329                 return _("Slide Edit");
 330
 331         case Lock:
 332                 return _("Lock Edit");
 333
 334         default:
 335         case Splice:
 336                 return _("Splice Edit");
 337         }
 338 }
 339
 340 SyncSource
 341 string_to_sync_source (string str)
 342 {
 343         if (str == _("MIDI Timecode")) {
 344                 return MTC;
 345         }
 346
 347         if (str == _("MIDI Clock")) {
 348                 return MIDIClock;
 349         }
 350
 351         if (str == _("JACK")) {
 352                 return JACK;
 353         }
 354
 355         fatal << string_compose (_("programming error: unknown sync source string \"%1\""), str) << endmsg;
 356         /*NOTREACHED*/
 357         return JACK;
 358 }
 359
 360 const char*
 361 sync_source_to_string (SyncSource src)
 362 {
 363         switch (src) {
 364         case JACK:
 365                 return _("JACK");
 366
 367         case MTC:
 368                 return _("MIDI Timecode");
 369
 370         case MIDIClock:
 371                 return _("MIDI Clock");
 372         }
 373         /* GRRRR .... stupid, stupid gcc - you can't get here from there, all enum values are handled */
 374         return _("JACK");
 375 }
 376
 377 float
 378 meter_falloff_to_float (MeterFalloff falloff)
 379 {
 380         switch (falloff) {
 381         case MeterFalloffOff:
 382                 return METER_FALLOFF_OFF;
 383         case MeterFalloffSlowest:
 384                 return METER_FALLOFF_SLOWEST;
 385         case MeterFalloffSlow:
 386                 return METER_FALLOFF_SLOW;
 387         case MeterFalloffMedium:
 388                 return METER_FALLOFF_MEDIUM;
 389         case MeterFalloffFast:
 390                 return METER_FALLOFF_FAST;
 391         case MeterFalloffFaster:
 392                 return METER_FALLOFF_FASTER;
 393         case MeterFalloffFastest:
 394                 return METER_FALLOFF_FASTEST;
 395         default:
 396                 return METER_FALLOFF_FAST;
 397         }
 398 }
 399
 400 MeterFalloff
 401 meter_falloff_from_float (float val)
 402 {
 403         if (val == METER_FALLOFF_OFF) {
 404                 return MeterFalloffOff;
 405         }
 406         else if (val <= METER_FALLOFF_SLOWEST) {
 407                 return MeterFalloffSlowest;
 408         }
 409         else if (val <= METER_FALLOFF_SLOW) {
 410                 return MeterFalloffSlow;
 411         }
 412         else if (val <= METER_FALLOFF_MEDIUM) {
 413                 return MeterFalloffMedium;
 414         }
 415         else if (val <= METER_FALLOFF_FAST) {
 416                 return MeterFalloffFast;
 417         }
 418         else if (val <= METER_FALLOFF_FASTER) {
 419                 return MeterFalloffFaster;
 420         }
 421         else {
 422                 return MeterFalloffFastest;
 423         }
 424 }
 425
 426 AutoState
 427 ARDOUR::string_to_auto_state (std::string str)
 428 {
 429         if (str == X_("Off")) {
 430                 return Off;
 431         } else if (str == X_("Play")) {
 432                 return Play;
 433         } else if (str == X_("Write")) {
 434                 return Write;
 435         } else if (str == X_("Touch")) {
 436                 return Touch;
 437         }
 438
 439         fatal << string_compose (_("programming error: %1 %2"), "illegal AutoState string: ", str) << endmsg;
 440         /*NOTREACHED*/
 441         return Touch;
 442 }
 443
 444 string
 445 ARDOUR::auto_state_to_string (AutoState as)
 446 {
 447         /* to be used only for XML serialization, no i18n done */
 448
 449         switch (as) {
 450         case Off:
 451                 return X_("Off");
 452                 break;
 453         case Play:
 454                 return X_("Play");
 455                 break;
 456         case Write:
 457                 return X_("Write");
 458                 break;
 459         case Touch:
 460                 return X_("Touch");
 461         }
 462
 463         fatal << string_compose (_("programming error: %1 %2"), "illegal AutoState type: ", as) << endmsg;
 464         /*NOTREACHED*/
 465         return "";
 466 }
 467
 468 AutoStyle
 469 ARDOUR::string_to_auto_style (std::string str)
 470 {
 471         if (str == X_("Absolute")) {
 472                 return Absolute;
 473         } else if (str == X_("Trim")) {
 474                 return Trim;
 475         }
 476
 477         fatal << string_compose (_("programming error: %1 %2"), "illegal AutoStyle string: ", str) << endmsg;
 478         /*NOTREACHED*/
 479         return Trim;
 480 }
 481
 482 string
 483 ARDOUR::auto_style_to_string (AutoStyle as)
 484 {
 485         /* to be used only for XML serialization, no i18n done */
 486
 487         switch (as) {
 488         case Absolute:
 489                 return X_("Absolute");
 490                 break;
 491         case Trim:
 492                 return X_("Trim");
 493                 break;
 494         }
 495
 496         fatal << string_compose (_("programming error: %1 %2"), "illegal AutoStyle type: ", as) << endmsg;
 497         /*NOTREACHED*/
 498         return "";
 499 }
 500
 501 std::string
 502 bool_as_string (bool yn)
 503 {
 504         return (yn ? "yes" : "no");
 505 }
 506
 507 bool
 508 string_is_affirmative (const std::string& str)
 509 {
 510         /* to be used only with XML data - not intended to handle user input */
 511
 512         return str == "1" || str == "y" || str == "Y" || (!g_strncasecmp(str.c_str(), "yes", str.length()));
 513 }
 514
 515 const char*
 516 native_header_format_extension (HeaderFormat hf, const DataType& type)
 517 {
 518         if (type == DataType::MIDI) {
 519                 return ".mid";
 520         }
 521
 522         switch (hf) {
 523         case BWF:
 524                 return ".wav";
 525         case WAVE:
 526                 return ".wav";
 527         case WAVE64:
 528                 return ".w64";
 529         case CAF:
 530                 return ".caf";
 531         case AIFF:
 532                 return ".aif";
 533         case iXML:
 534                 return ".ixml";
 535         case RF64:
 536                 return ".rf64";
 537         }
 538
 539         fatal << string_compose (_("programming error: unknown native header format: %1"), hf);
 540         /*NOTREACHED*/
 541         return ".wav";
 542 }
 543
 544 bool
 545 matching_unsuffixed_filename_exists_in (const string& dir, const string& path)
 546 {
 547         string bws = basename_nosuffix (path);
 548         struct dirent* dentry;
 549         struct stat statbuf;
 550         DIR* dead;
 551         bool ret = false;
 552
 553         if ((dead = ::opendir (dir.c_str())) == 0) {
 554                 error << string_compose (_("cannot open directory %1 (%2)"), dir, strerror (errno)) << endl;
 555                 return false;
 556         }
 557
 558         while ((dentry = ::readdir (dead)) != 0) {
 559
 560                 /* avoid '.' and '..' */
 561
 562                 if ((dentry->d_name[0] == '.' && dentry->d_name[1] == '\0') ||
 563                     (dentry->d_name[2] == '\0' && dentry->d_name[0] == '.' && dentry->d_name[1] == '.')) {
 564                         continue;
 565                 }
 566
 567                 string fullpath = Glib::build_filename (dir, dentry->d_name);
 568
 569                 if (::stat (fullpath.c_str(), &statbuf)) {
 570                         continue;
 571                 }
 572
 573                 if (!S_ISREG (statbuf.st_mode)) {
 574                         continue;
 575                 }
 576
 577                 string bws2 = basename_nosuffix (dentry->d_name);
 578
 579                 if (bws2 == bws) {
 580                         ret = true;
 581                         break;
 582                 }
 583         }
 584
 585         ::closedir (dead);
 586         return ret;
 587 }
 588
 589 extern "C" {
 590         void c_stacktrace() { stacktrace (cerr); }
 591 }