src/libFLAC++/metadata.cpp

   1 /* libFLAC++ - Free Lossless Audio Codec library
   2  * Copyright (C) 2002,2003,2004  Josh Coalson
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * - Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *
  11  * - Redistributions in binary form must reproduce the above copyright
  12  * notice, this list of conditions and the following disclaimer in the
  13  * documentation and/or other materials provided with the distribution.
  14  *
  15  * - Neither the name of the Xiph.org Foundation nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include "FLAC++/metadata.h"
  33 #include "FLAC/assert.h"
  34 #include <stdlib.h> // for malloc(), free()
  35 #include <string.h> // for memcpy() etc.
  36
  37 #ifdef _MSC_VER
  38 // warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
  39 #pragma warning ( disable : 4800 )
  40 #endif
  41
  42 namespace FLAC {
  43         namespace Metadata {
  44
  45                 // local utility routines
  46
  47                 namespace local {
  48
  49                         Prototype *construct_block(::FLAC__StreamMetadata *object)
  50                         {
  51                                 Prototype *ret = 0;
  52                                 switch(object->type) {
  53                                         case FLAC__METADATA_TYPE_STREAMINFO:
  54                                                 ret = new StreamInfo(object, /*copy=*/false);
  55                                                 break;
  56                                         case FLAC__METADATA_TYPE_PADDING:
  57                                                 ret = new Padding(object, /*copy=*/false);
  58                                                 break;
  59                                         case FLAC__METADATA_TYPE_APPLICATION:
  60                                                 ret = new Application(object, /*copy=*/false);
  61                                                 break;
  62                                         case FLAC__METADATA_TYPE_SEEKTABLE:
  63                                                 ret = new SeekTable(object, /*copy=*/false);
  64                                                 break;
  65                                         case FLAC__METADATA_TYPE_VORBIS_COMMENT:
  66                                                 ret = new VorbisComment(object, /*copy=*/false);
  67                                                 break;
  68                                         case FLAC__METADATA_TYPE_CUESHEET:
  69                                                 ret = new CueSheet(object, /*copy=*/false);
  70                                                 break;
  71                                         default:
  72                                                 ret = new Unknown(object, /*copy=*/false);
  73                                                 break;
  74                                 }
  75                                 return ret;
  76                         }
  77
  78                 };
  79
  80                 FLACPP_API Prototype *clone(const Prototype *object)
  81                 {
  82                         FLAC__ASSERT(0 != object);
  83
  84                         const StreamInfo *streaminfo = dynamic_cast<const StreamInfo *>(object);
  85                         const Padding *padding = dynamic_cast<const Padding *>(object);
  86                         const Application *application = dynamic_cast<const Application *>(object);
  87                         const SeekTable *seektable = dynamic_cast<const SeekTable *>(object);
  88                         const VorbisComment *vorbiscomment = dynamic_cast<const VorbisComment *>(object);
  89                         const CueSheet *cuesheet = dynamic_cast<const CueSheet *>(object);
  90                         const Unknown *unknown = dynamic_cast<const Unknown *>(object);
  91
  92                         if(0 != streaminfo)
  93                                 return new StreamInfo(*streaminfo);
  94                         else if(0 != padding)
  95                                 return new Padding(*padding);
  96                         else if(0 != application)
  97                                 return new Application(*application);
  98                         else if(0 != seektable)
  99                                 return new SeekTable(*seektable);
 100                         else if(0 != vorbiscomment)
 101                                 return new VorbisComment(*vorbiscomment);
 102                         else if(0 != cuesheet)
 103                                 return new CueSheet(*cuesheet);
 104                         else if(0 != unknown)
 105                                 return new Unknown(*unknown);
 106                         else {
 107                                 FLAC__ASSERT(0);
 108                                 return 0;
 109                         }
 110                 }
 111
 112                 //
 113                 // Prototype
 114                 //
 115
 116                 Prototype::Prototype(const Prototype &object):
 117                 object_(::FLAC__metadata_object_clone(object.object_)),
 118                 is_reference_(false)
 119                 {
 120                         FLAC__ASSERT(object.is_valid());
 121                 }
 122
 123                 Prototype::Prototype(const ::FLAC__StreamMetadata &object):
 124                 object_(::FLAC__metadata_object_clone(&object)),
 125                 is_reference_(false)
 126                 {
 127                 }
 128
 129                 Prototype::Prototype(const ::FLAC__StreamMetadata *object):
 130                 object_(::FLAC__metadata_object_clone(object)),
 131                 is_reference_(false)
 132                 {
 133                         FLAC__ASSERT(0 != object);
 134                 }
 135
 136                 Prototype::Prototype(::FLAC__StreamMetadata *object, bool copy):
 137                 object_(copy? ::FLAC__metadata_object_clone(object) : object),
 138                 is_reference_(false)
 139                 {
 140                         FLAC__ASSERT(0 != object);
 141                 }
 142
 143                 Prototype::~Prototype()
 144                 {
 145                         clear();
 146                 }
 147
 148                 void Prototype::clear()
 149                 {
 150                         if(0 != object_ && !is_reference_)
 151                                 FLAC__metadata_object_delete(object_);
 152                         object_ = 0;
 153                 }
 154
 155                 void Prototype::operator=(const Prototype &object)
 156                 {
 157                         FLAC__ASSERT(object.is_valid());
 158                         clear();
 159                         is_reference_ = false;
 160                         object_ = ::FLAC__metadata_object_clone(object.object_);
 161                 }
 162
 163                 void Prototype::operator=(const ::FLAC__StreamMetadata &object)
 164                 {
 165                         clear();
 166                         is_reference_ = false;
 167                         object_ = ::FLAC__metadata_object_clone(&object);
 168                 }
 169
 170                 void Prototype::operator=(const ::FLAC__StreamMetadata *object)
 171                 {
 172                         FLAC__ASSERT(0 != object);
 173                         clear();
 174                         is_reference_ = false;
 175                         object_ = ::FLAC__metadata_object_clone(object);
 176                 }
 177
 178                 bool Prototype::get_is_last() const
 179                 {
 180                         FLAC__ASSERT(is_valid());
 181                         return (bool)object_->is_last;
 182                 }
 183
 184                 FLAC__MetadataType Prototype::get_type() const
 185                 {
 186                         FLAC__ASSERT(is_valid());
 187                         return object_->type;
 188                 }
 189
 190                 unsigned Prototype::get_length() const
 191                 {
 192                         FLAC__ASSERT(is_valid());
 193                         return object_->length;
 194                 }
 195
 196                 void Prototype::set_is_last(bool value)
 197                 {
 198                         FLAC__ASSERT(is_valid());
 199                         object_->is_last = value;
 200                 }
 201
 202
 203                 //
 204                 // StreamInfo
 205                 //
 206
 207                 StreamInfo::StreamInfo():
 208                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_STREAMINFO), /*copy=*/false)
 209                 { }
 210
 211                 StreamInfo::~StreamInfo()
 212                 { }
 213
 214                 unsigned StreamInfo::get_min_blocksize() const
 215                 {
 216                         FLAC__ASSERT(is_valid());
 217                         return object_->data.stream_info.min_blocksize;
 218                 }
 219
 220                 unsigned StreamInfo::get_max_blocksize() const
 221                 {
 222                         FLAC__ASSERT(is_valid());
 223                         return object_->data.stream_info.max_blocksize;
 224                 }
 225
 226                 unsigned StreamInfo::get_min_framesize() const
 227                 {
 228                         FLAC__ASSERT(is_valid());
 229                         return object_->data.stream_info.min_framesize;
 230                 }
 231
 232                 unsigned StreamInfo::get_max_framesize() const
 233                 {
 234                         FLAC__ASSERT(is_valid());
 235                         return object_->data.stream_info.max_framesize;
 236                 }
 237
 238                 unsigned StreamInfo::get_sample_rate() const
 239                 {
 240                         FLAC__ASSERT(is_valid());
 241                         return object_->data.stream_info.sample_rate;
 242                 }
 243
 244                 unsigned StreamInfo::get_channels() const
 245                 {
 246                         FLAC__ASSERT(is_valid());
 247                         return object_->data.stream_info.channels;
 248                 }
 249
 250                 unsigned StreamInfo::get_bits_per_sample() const
 251                 {
 252                         FLAC__ASSERT(is_valid());
 253                         return object_->data.stream_info.bits_per_sample;
 254                 }
 255
 256                 FLAC__uint64 StreamInfo::get_total_samples() const
 257                 {
 258                         FLAC__ASSERT(is_valid());
 259                         return object_->data.stream_info.total_samples;
 260                 }
 261
 262                 const FLAC__byte *StreamInfo::get_md5sum() const
 263                 {
 264                         FLAC__ASSERT(is_valid());
 265                         return object_->data.stream_info.md5sum;
 266                 }
 267
 268                 void StreamInfo::set_min_blocksize(unsigned value)
 269                 {
 270                         FLAC__ASSERT(is_valid());
 271                         FLAC__ASSERT(value >= FLAC__MIN_BLOCK_SIZE);
 272                         FLAC__ASSERT(value <= FLAC__MAX_BLOCK_SIZE);
 273                         object_->data.stream_info.min_blocksize = value;
 274                 }
 275
 276                 void StreamInfo::set_max_blocksize(unsigned value)
 277                 {
 278                         FLAC__ASSERT(is_valid());
 279                         FLAC__ASSERT(value >= FLAC__MIN_BLOCK_SIZE);
 280                         FLAC__ASSERT(value <= FLAC__MAX_BLOCK_SIZE);
 281                         object_->data.stream_info.max_blocksize = value;
 282                 }
 283
 284                 void StreamInfo::set_min_framesize(unsigned value)
 285                 {
 286                         FLAC__ASSERT(is_valid());
 287                         FLAC__ASSERT(value < (1u < FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN));
 288                         object_->data.stream_info.min_framesize = value;
 289                 }
 290
 291                 void StreamInfo::set_max_framesize(unsigned value)
 292                 {
 293                         FLAC__ASSERT(is_valid());
 294                         FLAC__ASSERT(value < (1u < FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN));
 295                         object_->data.stream_info.max_framesize = value;
 296                 }
 297
 298                 void StreamInfo::set_sample_rate(unsigned value)
 299                 {
 300                         FLAC__ASSERT(is_valid());
 301                         FLAC__ASSERT(FLAC__format_sample_rate_is_valid(value));
 302                         object_->data.stream_info.sample_rate = value;
 303                 }
 304
 305                 void StreamInfo::set_channels(unsigned value)
 306                 {
 307                         FLAC__ASSERT(is_valid());
 308                         FLAC__ASSERT(value > 0);
 309                         FLAC__ASSERT(value <= FLAC__MAX_CHANNELS);
 310                         object_->data.stream_info.channels = value;
 311                 }
 312
 313                 void StreamInfo::set_bits_per_sample(unsigned value)
 314                 {
 315                         FLAC__ASSERT(is_valid());
 316                         FLAC__ASSERT(value >= FLAC__MIN_BITS_PER_SAMPLE);
 317                         FLAC__ASSERT(value <= FLAC__MAX_BITS_PER_SAMPLE);
 318                         object_->data.stream_info.bits_per_sample = value;
 319                 }
 320
 321                 void StreamInfo::set_total_samples(FLAC__uint64 value)
 322                 {
 323                         FLAC__ASSERT(is_valid());
 324                         FLAC__ASSERT(value < (1u << FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN));
 325                         object_->data.stream_info.total_samples = value;
 326                 }
 327
 328                 void StreamInfo::set_md5sum(const FLAC__byte value[16])
 329                 {
 330                         FLAC__ASSERT(is_valid());
 331                         FLAC__ASSERT(0 != value);
 332                         memcpy(object_->data.stream_info.md5sum, value, 16);
 333                 }
 334
 335
 336                 //
 337                 // Padding
 338                 //
 339
 340                 Padding::Padding():
 341                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING), /*copy=*/false)
 342                 { }
 343
 344                 Padding::~Padding()
 345                 { }
 346
 347                 void Padding::set_length(unsigned length)
 348                 {
 349                         FLAC__ASSERT(is_valid());
 350                         object_->length = length;
 351                 }
 352
 353
 354                 //
 355                 // Application
 356                 //
 357
 358                 Application::Application():
 359                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_APPLICATION), /*copy=*/false)
 360                 { }
 361
 362                 Application::~Application()
 363                 { }
 364
 365                 const FLAC__byte *Application::get_id() const
 366                 {
 367                         FLAC__ASSERT(is_valid());
 368                         return object_->data.application.id;
 369                 }
 370
 371                 const FLAC__byte *Application::get_data() const
 372                 {
 373                         FLAC__ASSERT(is_valid());
 374                         return object_->data.application.data;
 375                 }
 376
 377                 void Application::set_id(const FLAC__byte value[4])
 378                 {
 379                         FLAC__ASSERT(is_valid());
 380                         FLAC__ASSERT(0 != value);
 381                         memcpy(object_->data.application.id, value, 4);
 382                 }
 383
 384                 bool Application::set_data(const FLAC__byte *data, unsigned length)
 385                 {
 386                         FLAC__ASSERT(is_valid());
 387                         return (bool)::FLAC__metadata_object_application_set_data(object_, (FLAC__byte*)data, length, true);
 388                 }
 389
 390                 bool Application::set_data(FLAC__byte *data, unsigned length, bool copy)
 391                 {
 392                         FLAC__ASSERT(is_valid());
 393                         return (bool)::FLAC__metadata_object_application_set_data(object_, data, length, copy);
 394                 }
 395
 396
 397                 //
 398                 // SeekTable
 399                 //
 400
 401                 SeekTable::SeekTable():
 402                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_SEEKTABLE), /*copy=*/false)
 403                 { }
 404
 405                 SeekTable::~SeekTable()
 406                 { }
 407
 408                 unsigned SeekTable::get_num_points() const
 409                 {
 410                         FLAC__ASSERT(is_valid());
 411                         return object_->data.seek_table.num_points;
 412                 }
 413
 414                 ::FLAC__StreamMetadata_SeekPoint SeekTable::get_point(unsigned index) const
 415                 {
 416                         FLAC__ASSERT(is_valid());
 417                         FLAC__ASSERT(index < object_->data.seek_table.num_points);
 418                         return object_->data.seek_table.points[index];
 419                 }
 420
 421                 void SeekTable::set_point(unsigned index, const ::FLAC__StreamMetadata_SeekPoint &point)
 422                 {
 423                         FLAC__ASSERT(is_valid());
 424                         FLAC__ASSERT(index < object_->data.seek_table.num_points);
 425                         ::FLAC__metadata_object_seektable_set_point(object_, index, point);
 426                 }
 427
 428                 bool SeekTable::insert_point(unsigned index, const ::FLAC__StreamMetadata_SeekPoint &point)
 429                 {
 430                         FLAC__ASSERT(is_valid());
 431                         FLAC__ASSERT(index <= object_->data.seek_table.num_points);
 432                         return (bool)::FLAC__metadata_object_seektable_insert_point(object_, index, point);
 433                 }
 434
 435                 bool SeekTable::delete_point(unsigned index)
 436                 {
 437                         FLAC__ASSERT(is_valid());
 438                         FLAC__ASSERT(index < object_->data.seek_table.num_points);
 439                         return (bool)::FLAC__metadata_object_seektable_delete_point(object_, index);
 440                 }
 441
 442                 bool SeekTable::is_legal() const
 443                 {
 444                         FLAC__ASSERT(is_valid());
 445                         return (bool)::FLAC__metadata_object_seektable_is_legal(object_);
 446                 }
 447
 448
 449                 //
 450                 // VorbisComment::Entry
 451                 //
 452
 453                 VorbisComment::Entry::Entry()
 454                 {
 455                         zero();
 456                 }
 457
 458                 VorbisComment::Entry::Entry(const char *field, unsigned field_length)
 459                 {
 460                         zero();
 461                         construct(field, field_length);
 462                 }
 463
 464                 VorbisComment::Entry::Entry(const char *field_name, const char *field_value, unsigned field_value_length)
 465                 {
 466                         zero();
 467                         construct(field_name, field_value, field_value_length);
 468                 }
 469
 470                 VorbisComment::Entry::Entry(const Entry &entry)
 471                 {
 472                         FLAC__ASSERT(entry.is_valid());
 473                         zero();
 474                         construct((const char *)entry.entry_.entry, entry.entry_.length);
 475                 }
 476
 477                 void VorbisComment::Entry::operator=(const Entry &entry)
 478                 {
 479                         FLAC__ASSERT(entry.is_valid());
 480                         clear();
 481                         construct((const char *)entry.entry_.entry, entry.entry_.length);
 482                 }
 483
 484                 VorbisComment::Entry::~Entry()
 485                 {
 486                         clear();
 487                 }
 488
 489                 bool VorbisComment::Entry::is_valid() const
 490                 {
 491                         return is_valid_;
 492                 }
 493
 494                 unsigned VorbisComment::Entry::get_field_length() const
 495                 {
 496                         FLAC__ASSERT(is_valid());
 497                         return entry_.length;
 498                 }
 499
 500                 unsigned VorbisComment::Entry::get_field_name_length() const
 501                 {
 502                         FLAC__ASSERT(is_valid());
 503                         return field_name_length_;
 504                 }
 505
 506                 unsigned VorbisComment::Entry::get_field_value_length() const
 507                 {
 508                         FLAC__ASSERT(is_valid());
 509                         return field_value_length_;
 510                 }
 511
 512                 ::FLAC__StreamMetadata_VorbisComment_Entry VorbisComment::Entry::get_entry() const
 513                 {
 514                         FLAC__ASSERT(is_valid());
 515                         return entry_;
 516                 }
 517
 518                 const char *VorbisComment::Entry::get_field() const
 519                 {
 520                         FLAC__ASSERT(is_valid());
 521                         return (const char *)entry_.entry;
 522                 }
 523
 524                 const char *VorbisComment::Entry::get_field_name() const
 525                 {
 526                         FLAC__ASSERT(is_valid());
 527                         return field_name_;
 528                 }
 529
 530                 const char *VorbisComment::Entry::get_field_value() const
 531                 {
 532                         FLAC__ASSERT(is_valid());
 533                         return field_value_;
 534                 }
 535
 536                 bool VorbisComment::Entry::set_field(const char *field, unsigned field_length)
 537                 {
 538                         FLAC__ASSERT(is_valid());
 539                         FLAC__ASSERT(0 != field);
 540
 541                         clear_entry();
 542
 543                         if(0 == (entry_.entry = (FLAC__byte*)malloc(field_length))) {
 544                                 is_valid_ = false;
 545                         }
 546                         else {
 547                                 entry_.length = field_length;
 548                                 memcpy(entry_.entry, field, field_length);
 549                                 (void) parse_field();
 550                         }
 551
 552                         return is_valid_;
 553                 }
 554
 555                 bool VorbisComment::Entry::set_field_name(const char *field_name)
 556                 {
 557                         FLAC__ASSERT(is_valid());
 558                         FLAC__ASSERT(0 != field_name);
 559
 560                         clear_field_name();
 561
 562                         if(0 == (field_name_ = strdup(field_name))) {
 563                                 is_valid_ = false;
 564                         }
 565                         else {
 566                                 field_name_length_ = strlen(field_name_);
 567                                 compose_field();
 568                         }
 569
 570                         return is_valid_;
 571                 }
 572
 573                 bool VorbisComment::Entry::set_field_value(const char *field_value, unsigned field_value_length)
 574                 {
 575                         FLAC__ASSERT(is_valid());
 576                         FLAC__ASSERT(0 != field_value);
 577
 578                         clear_field_value();
 579
 580                         if(0 == (field_value_ = (char *)malloc(field_value_length))) {
 581                                 is_valid_ = false;
 582                         }
 583                         else {
 584                                 field_value_length_ = field_value_length;
 585                                 memcpy(field_value_, field_value, field_value_length);
 586                                 compose_field();
 587                         }
 588
 589                         return is_valid_;
 590                 }
 591
 592                 void VorbisComment::Entry::zero()
 593                 {
 594                         is_valid_ = true;
 595                         entry_.length = 0;
 596                         entry_.entry = 0;
 597                         field_name_ = 0;
 598                         field_name_length_ = 0;
 599                         field_value_ = 0;
 600                         field_value_length_ = 0;
 601                 }
 602
 603                 void VorbisComment::Entry::clear()
 604                 {
 605                         clear_entry();
 606                         clear_field_name();
 607                         clear_field_value();
 608                         is_valid_ = true;
 609                 }
 610
 611                 void VorbisComment::Entry::clear_entry()
 612                 {
 613                         if(0 != entry_.entry) {
 614                                 free(entry_.entry);
 615                                 entry_.entry = 0;
 616                                 entry_.length = 0;
 617                         }
 618                 }
 619
 620                 void VorbisComment::Entry::clear_field_name()
 621                 {
 622                         if(0 != field_name_) {
 623                                 free(field_name_);
 624                                 field_name_ = 0;
 625                                 field_name_length_ = 0;
 626                         }
 627                 }
 628
 629                 void VorbisComment::Entry::clear_field_value()
 630                 {
 631                         if(0 != field_value_) {
 632                                 free(field_value_);
 633                                 field_value_ = 0;
 634                                 field_value_length_ = 0;
 635                         }
 636                 }
 637
 638                 void VorbisComment::Entry::construct(const char *field, unsigned field_length)
 639                 {
 640                         if(set_field(field, field_length))
 641                                 parse_field();
 642                 }
 643
 644                 void VorbisComment::Entry::construct(const char *field_name, const char *field_value, unsigned field_value_length)
 645                 {
 646                         if(set_field_name(field_name) && set_field_value(field_value, field_value_length))
 647                                 compose_field();
 648                 }
 649
 650                 void VorbisComment::Entry::compose_field()
 651                 {
 652                         clear_entry();
 653
 654                         if(0 == (entry_.entry = (FLAC__byte*)malloc(field_name_length_ + 1 + field_value_length_))) {
 655                                 is_valid_ = false;
 656                         }
 657                         else {
 658                                 memcpy(entry_.entry, field_name_, field_name_length_);
 659                                 entry_.length += field_name_length_;
 660                                 memcpy(entry_.entry + entry_.length, "=", 1);
 661                                 entry_.length += 1;
 662                                 memcpy(entry_.entry + entry_.length, field_value_, field_value_length_);
 663                                 entry_.length += field_value_length_;
 664                                 is_valid_ = true;
 665                         }
 666                 }
 667
 668                 void VorbisComment::Entry::parse_field()
 669                 {
 670                         clear_field_name();
 671                         clear_field_value();
 672
 673                         const char *p = (const char *)memchr(entry_.entry, '=', entry_.length);
 674
 675                         if(0 == p)
 676                                 p = (const char *)entry_.entry + entry_.length;
 677
 678                         field_name_length_ = p - (const char *)entry_.entry;
 679                         if(0 == (field_name_ = (char *)malloc(field_name_length_ + 1))) { // +1 for the trailing \0
 680                                 is_valid_ = false;
 681                                 return;
 682                         }
 683                         memcpy(field_name_, entry_.entry, field_name_length_);
 684                         field_name_[field_name_length_] = '\0';
 685
 686                         if(entry_.length - field_name_length_ == 0) {
 687                                 field_value_length_ = 0;
 688                                 if(0 == (field_value_ = (char *)malloc(0))) {
 689                                         is_valid_ = false;
 690                                         return;
 691                                 }
 692                         }
 693                         else {
 694                                 field_value_length_ = entry_.length - field_name_length_ - 1;
 695                                 if(0 == (field_value_ = (char *)malloc(field_value_length_))) {
 696                                         is_valid_ = false;
 697                                         return;
 698                                 }
 699                                 memcpy(field_value_, ++p, field_value_length_);
 700                         }
 701
 702                         is_valid_ = true;
 703                 }
 704
 705
 706                 //
 707                 // VorbisComment
 708                 //
 709
 710                 VorbisComment::VorbisComment():
 711                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_VORBIS_COMMENT), /*copy=*/false)
 712                 { }
 713
 714                 VorbisComment::~VorbisComment()
 715                 { }
 716
 717                 unsigned VorbisComment::get_num_comments() const
 718                 {
 719                         FLAC__ASSERT(is_valid());
 720                         return object_->data.vorbis_comment.num_comments;
 721                 }
 722
 723                 VorbisComment::Entry VorbisComment::get_vendor_string() const
 724                 {
 725                         FLAC__ASSERT(is_valid());
 726                         return Entry((const char *)object_->data.vorbis_comment.vendor_string.entry, object_->data.vorbis_comment.vendor_string.length);
 727                 }
 728
 729                 VorbisComment::Entry VorbisComment::get_comment(unsigned index) const
 730                 {
 731                         FLAC__ASSERT(is_valid());
 732                         FLAC__ASSERT(index < object_->data.vorbis_comment.num_comments);
 733                         return Entry((const char *)object_->data.vorbis_comment.comments[index].entry, object_->data.vorbis_comment.comments[index].length);
 734                 }
 735
 736                 bool VorbisComment::set_vendor_string(const VorbisComment::Entry &entry)
 737                 {
 738                         FLAC__ASSERT(is_valid());
 739                         // vendor_string is a special kind of entry
 740                         ::FLAC__StreamMetadata_VorbisComment_Entry vendor_string;
 741                         vendor_string.length = entry.get_field_name_length();
 742                         vendor_string.entry = (FLAC__byte*)entry.get_field_name(); // we can cheat on const-ness because we make a copy below:
 743                         return (bool)::FLAC__metadata_object_vorbiscomment_set_vendor_string(object_, vendor_string, /*copy=*/true);
 744                 }
 745
 746                 bool VorbisComment::set_comment(unsigned index, const VorbisComment::Entry &entry)
 747                 {
 748                         FLAC__ASSERT(is_valid());
 749                         FLAC__ASSERT(index < object_->data.vorbis_comment.num_comments);
 750                         return (bool)::FLAC__metadata_object_vorbiscomment_set_comment(object_, index, entry.get_entry(), /*copy=*/true);
 751                 }
 752
 753                 bool VorbisComment::insert_comment(unsigned index, const VorbisComment::Entry &entry)
 754                 {
 755                         FLAC__ASSERT(is_valid());
 756                         FLAC__ASSERT(index <= object_->data.vorbis_comment.num_comments);
 757                         return (bool)::FLAC__metadata_object_vorbiscomment_insert_comment(object_, index, entry.get_entry(), /*copy=*/true);
 758                 }
 759
 760                 bool VorbisComment::delete_comment(unsigned index)
 761                 {
 762                         FLAC__ASSERT(is_valid());
 763                         FLAC__ASSERT(index < object_->data.vorbis_comment.num_comments);
 764                         return (bool)::FLAC__metadata_object_vorbiscomment_delete_comment(object_, index);
 765                 }
 766
 767
 768                 //
 769                 // CueSheet::Track
 770                 //
 771
 772                 CueSheet::Track::Track():
 773                 object_(::FLAC__metadata_object_cuesheet_track_new())
 774                 { }
 775
 776                 CueSheet::Track::Track(const ::FLAC__StreamMetadata_CueSheet_Track *track):
 777                 object_(::FLAC__metadata_object_cuesheet_track_clone(track))
 778                 { }
 779
 780                 CueSheet::Track::Track(const Track &track):
 781                 object_(::FLAC__metadata_object_cuesheet_track_clone(track.object_))
 782                 { }
 783
 784                 void CueSheet::Track::operator=(const Track &track)
 785                 {
 786                         if(0 != object_)
 787                                 ::FLAC__metadata_object_cuesheet_track_delete(object_);
 788                         object_ = ::FLAC__metadata_object_cuesheet_track_clone(track.object_);
 789                 }
 790
 791                 CueSheet::Track::~Track()
 792                 {
 793                         if(0 != object_)
 794                                 ::FLAC__metadata_object_cuesheet_track_delete(object_);
 795                 }
 796
 797                 bool CueSheet::Track::is_valid() const
 798                 {
 799                         return(0 != object_);
 800                 }
 801
 802                 ::FLAC__StreamMetadata_CueSheet_Index CueSheet::Track::get_index(unsigned i) const
 803                 {
 804                         FLAC__ASSERT(is_valid());
 805                         FLAC__ASSERT(i < object_->num_indices);
 806                         return object_->indices[i];
 807                 }
 808
 809                 void CueSheet::Track::set_isrc(const char value[12])
 810                 {
 811                         FLAC__ASSERT(is_valid());
 812                         FLAC__ASSERT(0 != value);
 813                         memcpy(object_->isrc, value, 12);
 814                         object_->isrc[12] = '\0';
 815                 }
 816
 817                 void CueSheet::Track::set_type(unsigned value)
 818                 {
 819                         FLAC__ASSERT(is_valid());
 820                         FLAC__ASSERT(value <= 1);
 821                         object_->type = value;
 822                 }
 823
 824                 void CueSheet::Track::set_index(unsigned i, const ::FLAC__StreamMetadata_CueSheet_Index &index)
 825                 {
 826                         FLAC__ASSERT(is_valid());
 827                         FLAC__ASSERT(i < object_->num_indices);
 828                         object_->indices[i] = index;
 829                 }
 830
 831
 832                 //
 833                 // CueSheet
 834                 //
 835
 836                 CueSheet::CueSheet():
 837                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_CUESHEET), /*copy=*/false)
 838                 { }
 839
 840                 CueSheet::~CueSheet()
 841                 { }
 842
 843                 const char *CueSheet::get_media_catalog_number() const
 844                 {
 845                         FLAC__ASSERT(is_valid());
 846                         return object_->data.cue_sheet.media_catalog_number;
 847                 }
 848
 849                 FLAC__uint64 CueSheet::get_lead_in() const
 850                 {
 851                         FLAC__ASSERT(is_valid());
 852                         return object_->data.cue_sheet.lead_in;
 853                 }
 854
 855                 bool CueSheet::get_is_cd() const
 856                 {
 857                         FLAC__ASSERT(is_valid());
 858                         return object_->data.cue_sheet.is_cd? true : false;
 859                 }
 860
 861                 unsigned CueSheet::get_num_tracks() const
 862                 {
 863                         FLAC__ASSERT(is_valid());
 864                         return object_->data.cue_sheet.num_tracks;
 865                 }
 866
 867                 CueSheet::Track CueSheet::get_track(unsigned i) const
 868                 {
 869                         FLAC__ASSERT(is_valid());
 870                         FLAC__ASSERT(i < object_->data.cue_sheet.num_tracks);
 871                         return Track(object_->data.cue_sheet.tracks + i);
 872                 }
 873
 874                 void CueSheet::set_media_catalog_number(const char value[128])
 875                 {
 876                         FLAC__ASSERT(is_valid());
 877                         FLAC__ASSERT(0 != value);
 878                         memcpy(object_->data.cue_sheet.media_catalog_number, value, 128);
 879                         object_->data.cue_sheet.media_catalog_number[128] = '\0';
 880                 }
 881
 882                 void CueSheet::set_lead_in(FLAC__uint64 value)
 883                 {
 884                         FLAC__ASSERT(is_valid());
 885                         object_->data.cue_sheet.lead_in = value;
 886                 }
 887
 888                 void CueSheet::set_is_cd(bool value)
 889                 {
 890                         FLAC__ASSERT(is_valid());
 891                         object_->data.cue_sheet.is_cd = value;
 892                 }
 893
 894                 void CueSheet::set_index(unsigned track_num, unsigned index_num, const ::FLAC__StreamMetadata_CueSheet_Index &index)
 895                 {
 896                         FLAC__ASSERT(is_valid());
 897                         FLAC__ASSERT(track_num < object_->data.cue_sheet.num_tracks);
 898                         FLAC__ASSERT(index_num < object_->data.cue_sheet.tracks[track_num].num_indices);
 899                         object_->data.cue_sheet.tracks[track_num].indices[index_num] = index;
 900                 }
 901
 902                 bool CueSheet::insert_index(unsigned track_num, unsigned index_num, const ::FLAC__StreamMetadata_CueSheet_Index &index)
 903                 {
 904                         FLAC__ASSERT(is_valid());
 905                         FLAC__ASSERT(track_num < object_->data.cue_sheet.num_tracks);
 906                         FLAC__ASSERT(index_num <= object_->data.cue_sheet.tracks[track_num].num_indices);
 907                         return (bool)::FLAC__metadata_object_cuesheet_track_insert_index(object_, track_num, index_num, index);
 908                 }
 909
 910                 bool CueSheet::delete_index(unsigned track_num, unsigned index_num)
 911                 {
 912                         FLAC__ASSERT(is_valid());
 913                         FLAC__ASSERT(track_num < object_->data.cue_sheet.num_tracks);
 914                         FLAC__ASSERT(index_num < object_->data.cue_sheet.tracks[track_num].num_indices);
 915                         return (bool)::FLAC__metadata_object_cuesheet_track_delete_index(object_, track_num, index_num);
 916                 }
 917
 918                 bool CueSheet::set_track(unsigned i, const CueSheet::Track &track)
 919                 {
 920                         FLAC__ASSERT(is_valid());
 921                         FLAC__ASSERT(i < object_->data.cue_sheet.num_tracks);
 922                         // We can safely const_cast since copy=true
 923                         return (bool)::FLAC__metadata_object_cuesheet_set_track(object_, i, const_cast< ::FLAC__StreamMetadata_CueSheet_Track*>(track.get_track()), /*copy=*/true);
 924                 }
 925
 926                 bool CueSheet::insert_track(unsigned i, const CueSheet::Track &track)
 927                 {
 928                         FLAC__ASSERT(is_valid());
 929                         FLAC__ASSERT(i <= object_->data.cue_sheet.num_tracks);
 930                         // We can safely const_cast since copy=true
 931                         return (bool)::FLAC__metadata_object_cuesheet_insert_track(object_, i, const_cast< ::FLAC__StreamMetadata_CueSheet_Track*>(track.get_track()), /*copy=*/true);
 932                 }
 933
 934                 bool CueSheet::delete_track(unsigned i)
 935                 {
 936                         FLAC__ASSERT(is_valid());
 937                         FLAC__ASSERT(i < object_->data.cue_sheet.num_tracks);
 938                         return (bool)::FLAC__metadata_object_cuesheet_delete_track(object_, i);
 939                 }
 940
 941                 bool CueSheet::is_legal(bool check_cd_da_subset, const char **violation) const
 942                 {
 943                         FLAC__ASSERT(is_valid());
 944                         return (bool)::FLAC__metadata_object_cuesheet_is_legal(object_, check_cd_da_subset, violation);
 945                 }
 946
 947
 948                 //
 949                 // Unknown
 950                 //
 951
 952                 Unknown::Unknown():
 953                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_APPLICATION), /*copy=*/false)
 954                 { }
 955
 956                 Unknown::~Unknown()
 957                 { }
 958
 959                 const FLAC__byte *Unknown::get_data() const
 960                 {
 961                         FLAC__ASSERT(is_valid());
 962                         return object_->data.application.data;
 963                 }
 964
 965                 bool Unknown::set_data(const FLAC__byte *data, unsigned length)
 966                 {
 967                         FLAC__ASSERT(is_valid());
 968                         return (bool)::FLAC__metadata_object_application_set_data(object_, (FLAC__byte*)data, length, true);
 969                 }
 970
 971                 bool Unknown::set_data(FLAC__byte *data, unsigned length, bool copy)
 972                 {
 973                         FLAC__ASSERT(is_valid());
 974                         return (bool)::FLAC__metadata_object_application_set_data(object_, data, length, copy);
 975                 }
 976
 977
 978                 // ============================================================
 979                 //
 980                 //  Level 0
 981                 //
 982                 // ============================================================
 983
 984                 FLACPP_API bool get_streaminfo(const char *filename, StreamInfo &streaminfo)
 985                 {
 986                         FLAC__ASSERT(0 != filename);
 987
 988                         ::FLAC__StreamMetadata object;
 989
 990                         if(::FLAC__metadata_get_streaminfo(filename, &object)) {
 991                                 streaminfo = object;
 992                                 return true;
 993                         }
 994                         else
 995                                 return false;
 996                 }
 997
 998                 FLACPP_API bool get_tags(const char *filename, VorbisComment *&tags)
 999                 {
1000                         FLAC__ASSERT(0 != filename);
1001
1002                         ::FLAC__StreamMetadata *object;
1003
1004                         tags = 0;
1005
1006                         if(::FLAC__metadata_get_tags(filename, &object)) {
1007                                 tags = new VorbisComment(object, /*copy=*/false);
1008                                 return true;
1009                         }
1010                         else
1011                                 return false;
1012                 }
1013
1014
1015                 // ============================================================
1016                 //
1017                 //  Level 1
1018                 //
1019                 // ============================================================
1020
1021                 SimpleIterator::SimpleIterator():
1022                 iterator_(::FLAC__metadata_simple_iterator_new())
1023                 { }
1024
1025                 SimpleIterator::~SimpleIterator()
1026                 {
1027                         clear();
1028                 }
1029
1030                 void SimpleIterator::clear()
1031                 {
1032                         if(0 != iterator_)
1033                                 FLAC__metadata_simple_iterator_delete(iterator_);
1034                         iterator_ = 0;
1035                 }
1036
1037                 bool SimpleIterator::init(const char *filename, bool read_only, bool preserve_file_stats)
1038                 {
1039                         FLAC__ASSERT(0 != filename);
1040                         FLAC__ASSERT(is_valid());
1041                         return (bool)::FLAC__metadata_simple_iterator_init(iterator_, filename, read_only, preserve_file_stats);
1042                 }
1043
1044                 bool SimpleIterator::is_valid() const
1045                 {
1046                         return 0 != iterator_;
1047                 }
1048
1049                 SimpleIterator::Status SimpleIterator::status()
1050                 {
1051                         FLAC__ASSERT(is_valid());
1052                         return Status(::FLAC__metadata_simple_iterator_status(iterator_));
1053                 }
1054
1055                 bool SimpleIterator::is_writable() const
1056                 {
1057                         FLAC__ASSERT(is_valid());
1058                         return (bool)::FLAC__metadata_simple_iterator_is_writable(iterator_);
1059                 }
1060
1061                 bool SimpleIterator::next()
1062                 {
1063                         FLAC__ASSERT(is_valid());
1064                         return (bool)::FLAC__metadata_simple_iterator_next(iterator_);
1065                 }
1066
1067                 bool SimpleIterator::prev()
1068                 {
1069                         FLAC__ASSERT(is_valid());
1070                         return (bool)::FLAC__metadata_simple_iterator_prev(iterator_);
1071                 }
1072
1073                 ::FLAC__MetadataType SimpleIterator::get_block_type() const
1074                 {
1075                         FLAC__ASSERT(is_valid());
1076                         return ::FLAC__metadata_simple_iterator_get_block_type(iterator_);
1077                 }
1078
1079                 Prototype *SimpleIterator::get_block()
1080                 {
1081                         FLAC__ASSERT(is_valid());
1082                         return local::construct_block(::FLAC__metadata_simple_iterator_get_block(iterator_));
1083                 }
1084
1085                 bool SimpleIterator::set_block(Prototype *block, bool use_padding)
1086                 {
1087                         FLAC__ASSERT(0 != block);
1088                         FLAC__ASSERT(is_valid());
1089                         return (bool)::FLAC__metadata_simple_iterator_set_block(iterator_, block->object_, use_padding);
1090                 }
1091
1092                 bool SimpleIterator::insert_block_after(Prototype *block, bool use_padding)
1093                 {
1094                         FLAC__ASSERT(0 != block);
1095                         FLAC__ASSERT(is_valid());
1096                         return (bool)::FLAC__metadata_simple_iterator_insert_block_after(iterator_, block->object_, use_padding);
1097                 }
1098
1099                 bool SimpleIterator::delete_block(bool use_padding)
1100                 {
1101                         FLAC__ASSERT(is_valid());
1102                         return (bool)::FLAC__metadata_simple_iterator_delete_block(iterator_, use_padding);
1103                 }
1104
1105
1106                 // ============================================================
1107                 //
1108                 //  Level 2
1109                 //
1110                 // ============================================================
1111
1112                 Chain::Chain():
1113                 chain_(::FLAC__metadata_chain_new())
1114                 { }
1115
1116                 Chain::~Chain()
1117                 {
1118                         clear();
1119                 }
1120
1121                 void Chain::clear()
1122                 {
1123                         if(0 != chain_)
1124                                 FLAC__metadata_chain_delete(chain_);
1125                         chain_ = 0;
1126                 }
1127
1128                 bool Chain::is_valid() const
1129                 {
1130                         return 0 != chain_;
1131                 }
1132
1133                 Chain::Status Chain::status()
1134                 {
1135                         FLAC__ASSERT(is_valid());
1136                         return Status(::FLAC__metadata_chain_status(chain_));
1137                 }
1138
1139                 bool Chain::read(const char *filename)
1140                 {
1141                         FLAC__ASSERT(0 != filename);
1142                         FLAC__ASSERT(is_valid());
1143                         return (bool)::FLAC__metadata_chain_read(chain_, filename);
1144                 }
1145
1146                 bool Chain::read(FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks)
1147                 {
1148                         FLAC__ASSERT(is_valid());
1149                         return (bool)::FLAC__metadata_chain_read_with_callbacks(chain_, handle, callbacks);
1150                 }
1151
1152                 bool Chain::check_if_tempfile_needed(bool use_padding)
1153                 {
1154                         FLAC__ASSERT(is_valid());
1155                         return (bool)::FLAC__metadata_chain_check_if_tempfile_needed(chain_, use_padding);
1156                 }
1157
1158                 bool Chain::write(bool use_padding, bool preserve_file_stats)
1159                 {
1160                         FLAC__ASSERT(is_valid());
1161                         return (bool)::FLAC__metadata_chain_write(chain_, use_padding, preserve_file_stats);
1162                 }
1163
1164                 bool Chain::write(bool use_padding, ::FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks)
1165                 {
1166                         FLAC__ASSERT(is_valid());
1167                         return (bool)::FLAC__metadata_chain_write_with_callbacks(chain_, use_padding, handle, callbacks);
1168                 }
1169
1170                 bool Chain::write(bool use_padding, ::FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks, ::FLAC__IOHandle temp_handle, ::FLAC__IOCallbacks temp_callbacks)
1171                 {
1172                         FLAC__ASSERT(is_valid());
1173                         return (bool)::FLAC__metadata_chain_write_with_callbacks_and_tempfile(chain_, use_padding, handle, callbacks, temp_handle, temp_callbacks);
1174                 }
1175
1176                 void Chain::merge_padding()
1177                 {
1178                         FLAC__ASSERT(is_valid());
1179                         ::FLAC__metadata_chain_merge_padding(chain_);
1180                 }
1181
1182                 void Chain::sort_padding()
1183                 {
1184                         FLAC__ASSERT(is_valid());
1185                         ::FLAC__metadata_chain_sort_padding(chain_);
1186                 }
1187
1188
1189                 Iterator::Iterator():
1190                 iterator_(::FLAC__metadata_iterator_new())
1191                 { }
1192
1193                 Iterator::~Iterator()
1194                 {
1195                         clear();
1196                 }
1197
1198                 void Iterator::clear()
1199                 {
1200                         if(0 != iterator_)
1201                                 FLAC__metadata_iterator_delete(iterator_);
1202                         iterator_ = 0;
1203                 }
1204
1205                 bool Iterator::is_valid() const
1206                 {
1207                         return 0 != iterator_;
1208                 }
1209
1210                 void Iterator::init(Chain &chain)
1211                 {
1212                         FLAC__ASSERT(is_valid());
1213                         FLAC__ASSERT(chain.is_valid());
1214                         ::FLAC__metadata_iterator_init(iterator_, chain.chain_);
1215                 }
1216
1217                 bool Iterator::next()
1218                 {
1219                         FLAC__ASSERT(is_valid());
1220                         return (bool)::FLAC__metadata_iterator_next(iterator_);
1221                 }
1222
1223                 bool Iterator::prev()
1224                 {
1225                         FLAC__ASSERT(is_valid());
1226                         return (bool)::FLAC__metadata_iterator_prev(iterator_);
1227                 }
1228
1229                 ::FLAC__MetadataType Iterator::get_block_type() const
1230                 {
1231                         FLAC__ASSERT(is_valid());
1232                         return ::FLAC__metadata_iterator_get_block_type(iterator_);
1233                 }
1234
1235                 Prototype *Iterator::get_block()
1236                 {
1237                         FLAC__ASSERT(is_valid());
1238                         Prototype *block = local::construct_block(::FLAC__metadata_iterator_get_block(iterator_));
1239                         if(0 != block)
1240                                 block->set_reference(true);
1241                         return block;
1242                 }
1243
1244                 bool Iterator::set_block(Prototype *block)
1245                 {
1246                         FLAC__ASSERT(0 != block);
1247                         FLAC__ASSERT(is_valid());
1248                         bool ret = (bool)::FLAC__metadata_iterator_set_block(iterator_, block->object_);
1249                         if(ret) {
1250                                 block->set_reference(true);
1251                                 delete block;
1252                         }
1253                         return ret;
1254                 }
1255
1256                 bool Iterator::delete_block(bool replace_with_padding)
1257                 {
1258                         FLAC__ASSERT(is_valid());
1259                         return (bool)::FLAC__metadata_iterator_delete_block(iterator_, replace_with_padding);
1260                 }
1261
1262                 bool Iterator::insert_block_before(Prototype *block)
1263                 {
1264                         FLAC__ASSERT(0 != block);
1265                         FLAC__ASSERT(is_valid());
1266                         bool ret = (bool)::FLAC__metadata_iterator_insert_block_before(iterator_, block->object_);
1267                         if(ret) {
1268                                 block->set_reference(true);
1269                                 delete block;
1270                         }
1271                         return ret;
1272                 }
1273
1274                 bool Iterator::insert_block_after(Prototype *block)
1275                 {
1276                         FLAC__ASSERT(0 != block);
1277                         FLAC__ASSERT(is_valid());
1278                         bool ret = (bool)::FLAC__metadata_iterator_insert_block_after(iterator_, block->object_);
1279                         if(ret) {
1280                                 block->set_reference(true);
1281                                 delete block;
1282                         }
1283                         return ret;
1284                 }
1285
1286         };
1287 };