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