src/libFLAC++/metadata.cpp

   1 /* libFLAC++ - Free Lossless Audio Codec library
   2  * Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009  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 #define __STDC_LIMIT_MACROS 1 /* otherwise SIZE_MAX is not defined for c++ */
  33 #include "share/alloc.h"
  34 #include "FLAC++/metadata.h"
  35 #include "FLAC/assert.h"
  36 #include <stdlib.h> // for malloc(), free()
  37 #include <string.h> // for memcpy() etc.
  38
  39 #ifdef _MSC_VER
  40 // warning C4800: 'int' : forcing to bool 'true' or 'false' (performance warning)
  41 #pragma warning ( disable : 4800 )
  42 #endif
  43
  44 namespace FLAC {
  45         namespace Metadata {
  46
  47                 // local utility routines
  48
  49                 namespace local {
  50
  51                         Prototype *construct_block(::FLAC__StreamMetadata *object)
  52                         {
  53                                 Prototype *ret = 0;
  54                                 switch(object->type) {
  55                                         case FLAC__METADATA_TYPE_STREAMINFO:
  56                                                 ret = new StreamInfo(object, /*copy=*/false);
  57                                                 break;
  58                                         case FLAC__METADATA_TYPE_PADDING:
  59                                                 ret = new Padding(object, /*copy=*/false);
  60                                                 break;
  61                                         case FLAC__METADATA_TYPE_APPLICATION:
  62                                                 ret = new Application(object, /*copy=*/false);
  63                                                 break;
  64                                         case FLAC__METADATA_TYPE_SEEKTABLE:
  65                                                 ret = new SeekTable(object, /*copy=*/false);
  66                                                 break;
  67                                         case FLAC__METADATA_TYPE_VORBIS_COMMENT:
  68                                                 ret = new VorbisComment(object, /*copy=*/false);
  69                                                 break;
  70                                         case FLAC__METADATA_TYPE_CUESHEET:
  71                                                 ret = new CueSheet(object, /*copy=*/false);
  72                                                 break;
  73                                         case FLAC__METADATA_TYPE_PICTURE:
  74                                                 ret = new Picture(object, /*copy=*/false);
  75                                                 break;
  76                                         default:
  77                                                 ret = new Unknown(object, /*copy=*/false);
  78                                                 break;
  79                                 }
  80                                 return ret;
  81                         }
  82
  83                 }
  84
  85                 FLACPP_API Prototype *clone(const Prototype *object)
  86                 {
  87                         FLAC__ASSERT(0 != object);
  88
  89                         const StreamInfo *streaminfo = dynamic_cast<const StreamInfo *>(object);
  90                         const Padding *padding = dynamic_cast<const Padding *>(object);
  91                         const Application *application = dynamic_cast<const Application *>(object);
  92                         const SeekTable *seektable = dynamic_cast<const SeekTable *>(object);
  93                         const VorbisComment *vorbiscomment = dynamic_cast<const VorbisComment *>(object);
  94                         const CueSheet *cuesheet = dynamic_cast<const CueSheet *>(object);
  95                         const Picture *picture = dynamic_cast<const Picture *>(object);
  96                         const Unknown *unknown = dynamic_cast<const Unknown *>(object);
  97
  98                         if(0 != streaminfo)
  99                                 return new StreamInfo(*streaminfo);
 100                         else if(0 != padding)
 101                                 return new Padding(*padding);
 102                         else if(0 != application)
 103                                 return new Application(*application);
 104                         else if(0 != seektable)
 105                                 return new SeekTable(*seektable);
 106                         else if(0 != vorbiscomment)
 107                                 return new VorbisComment(*vorbiscomment);
 108                         else if(0 != cuesheet)
 109                                 return new CueSheet(*cuesheet);
 110                         else if(0 != picture)
 111                                 return new Picture(*picture);
 112                         else if(0 != unknown)
 113                                 return new Unknown(*unknown);
 114                         else {
 115                                 FLAC__ASSERT(0);
 116                                 return 0;
 117                         }
 118                 }
 119
 120                 //
 121                 // Prototype
 122                 //
 123
 124                 Prototype::Prototype(const Prototype &object):
 125                 object_(::FLAC__metadata_object_clone(object.object_)),
 126                 is_reference_(false)
 127                 {
 128                         FLAC__ASSERT(object.is_valid());
 129                 }
 130
 131                 Prototype::Prototype(const ::FLAC__StreamMetadata &object):
 132                 object_(::FLAC__metadata_object_clone(&object)),
 133                 is_reference_(false)
 134                 {
 135                 }
 136
 137                 Prototype::Prototype(const ::FLAC__StreamMetadata *object):
 138                 object_(::FLAC__metadata_object_clone(object)),
 139                 is_reference_(false)
 140                 {
 141                         FLAC__ASSERT(0 != object);
 142                 }
 143
 144                 Prototype::Prototype(::FLAC__StreamMetadata *object, bool copy):
 145                 object_(copy? ::FLAC__metadata_object_clone(object) : object),
 146                 is_reference_(false)
 147                 {
 148                         FLAC__ASSERT(0 != object);
 149                 }
 150
 151                 Prototype::~Prototype()
 152                 {
 153                         clear();
 154                 }
 155
 156                 void Prototype::clear()
 157                 {
 158                         if(0 != object_ && !is_reference_)
 159                                 FLAC__metadata_object_delete(object_);
 160                         object_ = 0;
 161                 }
 162
 163                 Prototype &Prototype::operator=(const Prototype &object)
 164                 {
 165                         FLAC__ASSERT(object.is_valid());
 166                         clear();
 167                         is_reference_ = false;
 168                         object_ = ::FLAC__metadata_object_clone(object.object_);
 169                         return *this;
 170                 }
 171
 172                 Prototype &Prototype::operator=(const ::FLAC__StreamMetadata &object)
 173                 {
 174                         clear();
 175                         is_reference_ = false;
 176                         object_ = ::FLAC__metadata_object_clone(&object);
 177                         return *this;
 178                 }
 179
 180                 Prototype &Prototype::operator=(const ::FLAC__StreamMetadata *object)
 181                 {
 182                         FLAC__ASSERT(0 != object);
 183                         clear();
 184                         is_reference_ = false;
 185                         object_ = ::FLAC__metadata_object_clone(object);
 186                         return *this;
 187                 }
 188
 189                 Prototype &Prototype::assign_object(::FLAC__StreamMetadata *object, bool copy)
 190                 {
 191                         FLAC__ASSERT(0 != object);
 192                         clear();
 193                         object_ = (copy? ::FLAC__metadata_object_clone(object) : object);
 194                         is_reference_ = false;
 195                         return *this;
 196                 }
 197
 198                 bool Prototype::get_is_last() const
 199                 {
 200                         FLAC__ASSERT(is_valid());
 201                         return (bool)object_->is_last;
 202                 }
 203
 204                 FLAC__MetadataType Prototype::get_type() const
 205                 {
 206                         FLAC__ASSERT(is_valid());
 207                         return object_->type;
 208                 }
 209
 210                 unsigned Prototype::get_length() const
 211                 {
 212                         FLAC__ASSERT(is_valid());
 213                         return object_->length;
 214                 }
 215
 216                 void Prototype::set_is_last(bool value)
 217                 {
 218                         FLAC__ASSERT(is_valid());
 219                         object_->is_last = value;
 220                 }
 221
 222
 223                 //
 224                 // StreamInfo
 225                 //
 226
 227                 StreamInfo::StreamInfo():
 228                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_STREAMINFO), /*copy=*/false)
 229                 { }
 230
 231                 StreamInfo::~StreamInfo()
 232                 { }
 233
 234                 unsigned StreamInfo::get_min_blocksize() const
 235                 {
 236                         FLAC__ASSERT(is_valid());
 237                         return object_->data.stream_info.min_blocksize;
 238                 }
 239
 240                 unsigned StreamInfo::get_max_blocksize() const
 241                 {
 242                         FLAC__ASSERT(is_valid());
 243                         return object_->data.stream_info.max_blocksize;
 244                 }
 245
 246                 unsigned StreamInfo::get_min_framesize() const
 247                 {
 248                         FLAC__ASSERT(is_valid());
 249                         return object_->data.stream_info.min_framesize;
 250                 }
 251
 252                 unsigned StreamInfo::get_max_framesize() const
 253                 {
 254                         FLAC__ASSERT(is_valid());
 255                         return object_->data.stream_info.max_framesize;
 256                 }
 257
 258                 unsigned StreamInfo::get_sample_rate() const
 259                 {
 260                         FLAC__ASSERT(is_valid());
 261                         return object_->data.stream_info.sample_rate;
 262                 }
 263
 264                 unsigned StreamInfo::get_channels() const
 265                 {
 266                         FLAC__ASSERT(is_valid());
 267                         return object_->data.stream_info.channels;
 268                 }
 269
 270                 unsigned StreamInfo::get_bits_per_sample() const
 271                 {
 272                         FLAC__ASSERT(is_valid());
 273                         return object_->data.stream_info.bits_per_sample;
 274                 }
 275
 276                 FLAC__uint64 StreamInfo::get_total_samples() const
 277                 {
 278                         FLAC__ASSERT(is_valid());
 279                         return object_->data.stream_info.total_samples;
 280                 }
 281
 282                 const FLAC__byte *StreamInfo::get_md5sum() const
 283                 {
 284                         FLAC__ASSERT(is_valid());
 285                         return object_->data.stream_info.md5sum;
 286                 }
 287
 288                 void StreamInfo::set_min_blocksize(unsigned value)
 289                 {
 290                         FLAC__ASSERT(is_valid());
 291                         FLAC__ASSERT(value >= FLAC__MIN_BLOCK_SIZE);
 292                         FLAC__ASSERT(value <= FLAC__MAX_BLOCK_SIZE);
 293                         object_->data.stream_info.min_blocksize = value;
 294                 }
 295
 296                 void StreamInfo::set_max_blocksize(unsigned value)
 297                 {
 298                         FLAC__ASSERT(is_valid());
 299                         FLAC__ASSERT(value >= FLAC__MIN_BLOCK_SIZE);
 300                         FLAC__ASSERT(value <= FLAC__MAX_BLOCK_SIZE);
 301                         object_->data.stream_info.max_blocksize = value;
 302                 }
 303
 304                 void StreamInfo::set_min_framesize(unsigned value)
 305                 {
 306                         FLAC__ASSERT(is_valid());
 307                         FLAC__ASSERT(value < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN));
 308                         object_->data.stream_info.min_framesize = value;
 309                 }
 310
 311                 void StreamInfo::set_max_framesize(unsigned value)
 312                 {
 313                         FLAC__ASSERT(is_valid());
 314                         FLAC__ASSERT(value < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN));
 315                         object_->data.stream_info.max_framesize = value;
 316                 }
 317
 318                 void StreamInfo::set_sample_rate(unsigned value)
 319                 {
 320                         FLAC__ASSERT(is_valid());
 321                         FLAC__ASSERT(FLAC__format_sample_rate_is_valid(value));
 322                         object_->data.stream_info.sample_rate = value;
 323                 }
 324
 325                 void StreamInfo::set_channels(unsigned value)
 326                 {
 327                         FLAC__ASSERT(is_valid());
 328                         FLAC__ASSERT(value > 0);
 329                         FLAC__ASSERT(value <= FLAC__MAX_CHANNELS);
 330                         object_->data.stream_info.channels = value;
 331                 }
 332
 333                 void StreamInfo::set_bits_per_sample(unsigned value)
 334                 {
 335                         FLAC__ASSERT(is_valid());
 336                         FLAC__ASSERT(value >= FLAC__MIN_BITS_PER_SAMPLE);
 337                         FLAC__ASSERT(value <= FLAC__MAX_BITS_PER_SAMPLE);
 338                         object_->data.stream_info.bits_per_sample = value;
 339                 }
 340
 341                 void StreamInfo::set_total_samples(FLAC__uint64 value)
 342                 {
 343                         FLAC__ASSERT(is_valid());
 344                         FLAC__ASSERT(value < (((FLAC__uint64)1) << FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN));
 345                         object_->data.stream_info.total_samples = value;
 346                 }
 347
 348                 void StreamInfo::set_md5sum(const FLAC__byte value[16])
 349                 {
 350                         FLAC__ASSERT(is_valid());
 351                         FLAC__ASSERT(0 != value);
 352                         memcpy(object_->data.stream_info.md5sum, value, 16);
 353                 }
 354
 355
 356                 //
 357                 // Padding
 358                 //
 359
 360                 Padding::Padding():
 361                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING), /*copy=*/false)
 362                 { }
 363
 364                 Padding::~Padding()
 365                 { }
 366
 367                 void Padding::set_length(unsigned length)
 368                 {
 369                         FLAC__ASSERT(is_valid());
 370                         object_->length = length;
 371                 }
 372
 373
 374                 //
 375                 // Application
 376                 //
 377
 378                 Application::Application():
 379                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_APPLICATION), /*copy=*/false)
 380                 { }
 381
 382                 Application::~Application()
 383                 { }
 384
 385                 const FLAC__byte *Application::get_id() const
 386                 {
 387                         FLAC__ASSERT(is_valid());
 388                         return object_->data.application.id;
 389                 }
 390
 391                 const FLAC__byte *Application::get_data() const
 392                 {
 393                         FLAC__ASSERT(is_valid());
 394                         return object_->data.application.data;
 395                 }
 396
 397                 void Application::set_id(const FLAC__byte value[4])
 398                 {
 399                         FLAC__ASSERT(is_valid());
 400                         FLAC__ASSERT(0 != value);
 401                         memcpy(object_->data.application.id, value, 4);
 402                 }
 403
 404                 bool Application::set_data(const FLAC__byte *data, unsigned length)
 405                 {
 406                         FLAC__ASSERT(is_valid());
 407                         return (bool)::FLAC__metadata_object_application_set_data(object_, (FLAC__byte*)data, length, true);
 408                 }
 409
 410                 bool Application::set_data(FLAC__byte *data, unsigned length, bool copy)
 411                 {
 412                         FLAC__ASSERT(is_valid());
 413                         return (bool)::FLAC__metadata_object_application_set_data(object_, data, length, copy);
 414                 }
 415
 416
 417                 //
 418                 // SeekTable
 419                 //
 420
 421                 SeekTable::SeekTable():
 422                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_SEEKTABLE), /*copy=*/false)
 423                 { }
 424
 425                 SeekTable::~SeekTable()
 426                 { }
 427
 428                 unsigned SeekTable::get_num_points() const
 429                 {
 430                         FLAC__ASSERT(is_valid());
 431                         return object_->data.seek_table.num_points;
 432                 }
 433
 434                 ::FLAC__StreamMetadata_SeekPoint SeekTable::get_point(unsigned index) const
 435                 {
 436                         FLAC__ASSERT(is_valid());
 437                         FLAC__ASSERT(index < object_->data.seek_table.num_points);
 438                         return object_->data.seek_table.points[index];
 439                 }
 440
 441                 bool SeekTable::resize_points(unsigned new_num_points)
 442                 {
 443                         FLAC__ASSERT(is_valid());
 444                         return (bool)::FLAC__metadata_object_seektable_resize_points(object_, new_num_points);
 445                 }
 446
 447                 void SeekTable::set_point(unsigned index, const ::FLAC__StreamMetadata_SeekPoint &point)
 448                 {
 449                         FLAC__ASSERT(is_valid());
 450                         FLAC__ASSERT(index < object_->data.seek_table.num_points);
 451                         ::FLAC__metadata_object_seektable_set_point(object_, index, point);
 452                 }
 453
 454                 bool SeekTable::insert_point(unsigned index, const ::FLAC__StreamMetadata_SeekPoint &point)
 455                 {
 456                         FLAC__ASSERT(is_valid());
 457                         FLAC__ASSERT(index <= object_->data.seek_table.num_points);
 458                         return (bool)::FLAC__metadata_object_seektable_insert_point(object_, index, point);
 459                 }
 460
 461                 bool SeekTable::delete_point(unsigned index)
 462                 {
 463                         FLAC__ASSERT(is_valid());
 464                         FLAC__ASSERT(index < object_->data.seek_table.num_points);
 465                         return (bool)::FLAC__metadata_object_seektable_delete_point(object_, index);
 466                 }
 467
 468                 bool SeekTable::is_legal() const
 469                 {
 470                         FLAC__ASSERT(is_valid());
 471                         return (bool)::FLAC__metadata_object_seektable_is_legal(object_);
 472                 }
 473
 474                 bool SeekTable::template_append_placeholders(unsigned num)
 475                 {
 476                         FLAC__ASSERT(is_valid());
 477                         return (bool)::FLAC__metadata_object_seektable_template_append_placeholders(object_, num);
 478                 }
 479
 480                 bool SeekTable::template_append_point(FLAC__uint64 sample_number)
 481                 {
 482                         FLAC__ASSERT(is_valid());
 483                         return (bool)::FLAC__metadata_object_seektable_template_append_point(object_, sample_number);
 484                 }
 485
 486                 bool SeekTable::template_append_points(FLAC__uint64 sample_numbers[], unsigned num)
 487                 {
 488                         FLAC__ASSERT(is_valid());
 489                         return (bool)::FLAC__metadata_object_seektable_template_append_points(object_, sample_numbers, num);
 490                 }
 491
 492                 bool SeekTable::template_append_spaced_points(unsigned num, FLAC__uint64 total_samples)
 493                 {
 494                         FLAC__ASSERT(is_valid());
 495                         return (bool)::FLAC__metadata_object_seektable_template_append_spaced_points(object_, num, total_samples);
 496                 }
 497
 498                 bool SeekTable::template_append_spaced_points_by_samples(unsigned samples, FLAC__uint64 total_samples)
 499                 {
 500                         FLAC__ASSERT(is_valid());
 501                         return (bool)::FLAC__metadata_object_seektable_template_append_spaced_points_by_samples(object_, samples, total_samples);
 502                 }
 503
 504                 bool SeekTable::template_sort(bool compact)
 505                 {
 506                         FLAC__ASSERT(is_valid());
 507                         return (bool)::FLAC__metadata_object_seektable_template_sort(object_, compact);
 508                 }
 509
 510
 511                 //
 512                 // VorbisComment::Entry
 513                 //
 514
 515                 VorbisComment::Entry::Entry()
 516                 {
 517                         zero();
 518                 }
 519
 520                 VorbisComment::Entry::Entry(const char *field, unsigned field_length)
 521                 {
 522                         zero();
 523                         construct(field, field_length);
 524                 }
 525
 526                 VorbisComment::Entry::Entry(const char *field)
 527                 {
 528                         zero();
 529                         construct(field);
 530                 }
 531
 532                 VorbisComment::Entry::Entry(const char *field_name, const char *field_value, unsigned field_value_length)
 533                 {
 534                         zero();
 535                         construct(field_name, field_value, field_value_length);
 536                 }
 537
 538                 VorbisComment::Entry::Entry(const char *field_name, const char *field_value)
 539                 {
 540                         zero();
 541                         construct(field_name, field_value);
 542                 }
 543
 544                 VorbisComment::Entry::Entry(const Entry &entry)
 545                 {
 546                         FLAC__ASSERT(entry.is_valid());
 547                         zero();
 548                         construct((const char *)entry.entry_.entry, entry.entry_.length);
 549                 }
 550
 551                 VorbisComment::Entry &VorbisComment::Entry::operator=(const Entry &entry)
 552                 {
 553                         FLAC__ASSERT(entry.is_valid());
 554                         clear();
 555                         construct((const char *)entry.entry_.entry, entry.entry_.length);
 556                         return *this;
 557                 }
 558
 559                 VorbisComment::Entry::~Entry()
 560                 {
 561                         clear();
 562                 }
 563
 564                 bool VorbisComment::Entry::is_valid() const
 565                 {
 566                         return is_valid_;
 567                 }
 568
 569                 unsigned VorbisComment::Entry::get_field_length() const
 570                 {
 571                         FLAC__ASSERT(is_valid());
 572                         return entry_.length;
 573                 }
 574
 575                 unsigned VorbisComment::Entry::get_field_name_length() const
 576                 {
 577                         FLAC__ASSERT(is_valid());
 578                         return field_name_length_;
 579                 }
 580
 581                 unsigned VorbisComment::Entry::get_field_value_length() const
 582                 {
 583                         FLAC__ASSERT(is_valid());
 584                         return field_value_length_;
 585                 }
 586
 587                 ::FLAC__StreamMetadata_VorbisComment_Entry VorbisComment::Entry::get_entry() const
 588                 {
 589                         FLAC__ASSERT(is_valid());
 590                         return entry_;
 591                 }
 592
 593                 const char *VorbisComment::Entry::get_field() const
 594                 {
 595                         FLAC__ASSERT(is_valid());
 596                         return (const char *)entry_.entry;
 597                 }
 598
 599                 const char *VorbisComment::Entry::get_field_name() const
 600                 {
 601                         FLAC__ASSERT(is_valid());
 602                         return field_name_;
 603                 }
 604
 605                 const char *VorbisComment::Entry::get_field_value() const
 606                 {
 607                         FLAC__ASSERT(is_valid());
 608                         return field_value_;
 609                 }
 610
 611                 bool VorbisComment::Entry::set_field(const char *field, unsigned field_length)
 612                 {
 613                         FLAC__ASSERT(is_valid());
 614                         FLAC__ASSERT(0 != field);
 615
 616                         if(!::FLAC__format_vorbiscomment_entry_is_legal((const ::FLAC__byte*)field, field_length))
 617                                 return is_valid_ = false;
 618
 619                         clear_entry();
 620
 621                         if(0 == (entry_.entry = (FLAC__byte*)safe_malloc_add_2op_(field_length, /*+*/1))) {
 622                                 is_valid_ = false;
 623                         }
 624                         else {
 625                                 entry_.length = field_length;
 626                                 memcpy(entry_.entry, field, field_length);
 627                                 entry_.entry[field_length] = '\0';
 628                                 (void) parse_field();
 629                         }
 630
 631                         return is_valid_;
 632                 }
 633
 634                 bool VorbisComment::Entry::set_field(const char *field)
 635                 {
 636                         return set_field(field, strlen(field));
 637                 }
 638
 639                 bool VorbisComment::Entry::set_field_name(const char *field_name)
 640                 {
 641                         FLAC__ASSERT(is_valid());
 642                         FLAC__ASSERT(0 != field_name);
 643
 644                         if(!::FLAC__format_vorbiscomment_entry_name_is_legal(field_name))
 645                                 return is_valid_ = false;
 646
 647                         clear_field_name();
 648
 649                         if(0 == (field_name_ = strdup(field_name))) {
 650                                 is_valid_ = false;
 651                         }
 652                         else {
 653                                 field_name_length_ = strlen(field_name_);
 654                                 compose_field();
 655                         }
 656
 657                         return is_valid_;
 658                 }
 659
 660                 bool VorbisComment::Entry::set_field_value(const char *field_value, unsigned field_value_length)
 661                 {
 662                         FLAC__ASSERT(is_valid());
 663                         FLAC__ASSERT(0 != field_value);
 664
 665                         if(!::FLAC__format_vorbiscomment_entry_value_is_legal((const FLAC__byte*)field_value, field_value_length))
 666                                 return is_valid_ = false;
 667
 668                         clear_field_value();
 669
 670                         if(0 == (field_value_ = (char *)safe_malloc_add_2op_(field_value_length, /*+*/1))) {
 671                                 is_valid_ = false;
 672                         }
 673                         else {
 674                                 field_value_length_ = field_value_length;
 675                                 memcpy(field_value_, field_value, field_value_length);
 676                                 field_value_[field_value_length] = '\0';
 677                                 compose_field();
 678                         }
 679
 680                         return is_valid_;
 681                 }
 682
 683                 bool VorbisComment::Entry::set_field_value(const char *field_value)
 684                 {
 685                         return set_field_value(field_value, strlen(field_value));
 686                 }
 687
 688                 void VorbisComment::Entry::zero()
 689                 {
 690                         is_valid_ = true;
 691                         entry_.length = 0;
 692                         entry_.entry = 0;
 693                         field_name_ = 0;
 694                         field_name_length_ = 0;
 695                         field_value_ = 0;
 696                         field_value_length_ = 0;
 697                 }
 698
 699                 void VorbisComment::Entry::clear()
 700                 {
 701                         clear_entry();
 702                         clear_field_name();
 703                         clear_field_value();
 704                         is_valid_ = true;
 705                 }
 706
 707                 void VorbisComment::Entry::clear_entry()
 708                 {
 709                         if(0 != entry_.entry) {
 710                                 free(entry_.entry);
 711                                 entry_.entry = 0;
 712                                 entry_.length = 0;
 713                         }
 714                 }
 715
 716                 void VorbisComment::Entry::clear_field_name()
 717                 {
 718                         if(0 != field_name_) {
 719                                 free(field_name_);
 720                                 field_name_ = 0;
 721                                 field_name_length_ = 0;
 722                         }
 723                 }
 724
 725                 void VorbisComment::Entry::clear_field_value()
 726                 {
 727                         if(0 != field_value_) {
 728                                 free(field_value_);
 729                                 field_value_ = 0;
 730                                 field_value_length_ = 0;
 731                         }
 732                 }
 733
 734                 void VorbisComment::Entry::construct(const char *field, unsigned field_length)
 735                 {
 736                         if(set_field(field, field_length))
 737                                 parse_field();
 738                 }
 739
 740                 void VorbisComment::Entry::construct(const char *field)
 741                 {
 742                         construct(field, strlen(field));
 743                 }
 744
 745                 void VorbisComment::Entry::construct(const char *field_name, const char *field_value, unsigned field_value_length)
 746                 {
 747                         if(set_field_name(field_name) && set_field_value(field_value, field_value_length))
 748                                 compose_field();
 749                 }
 750
 751                 void VorbisComment::Entry::construct(const char *field_name, const char *field_value)
 752                 {
 753                         construct(field_name, field_value, strlen(field_value));
 754                 }
 755
 756                 void VorbisComment::Entry::compose_field()
 757                 {
 758                         clear_entry();
 759
 760                         if(0 == (entry_.entry = (FLAC__byte*)safe_malloc_add_4op_(field_name_length_, /*+*/1, /*+*/field_value_length_, /*+*/1))) {
 761                                 is_valid_ = false;
 762                         }
 763                         else {
 764                                 memcpy(entry_.entry, field_name_, field_name_length_);
 765                                 entry_.length += field_name_length_;
 766                                 memcpy(entry_.entry + entry_.length, "=", 1);
 767                                 entry_.length += 1;
 768                                 memcpy(entry_.entry + entry_.length, field_value_, field_value_length_);
 769                                 entry_.length += field_value_length_;
 770                                 entry_.entry[entry_.length] = '\0';
 771                                 is_valid_ = true;
 772                         }
 773                 }
 774
 775                 void VorbisComment::Entry::parse_field()
 776                 {
 777                         clear_field_name();
 778                         clear_field_value();
 779
 780                         const char *p = (const char *)memchr(entry_.entry, '=', entry_.length);
 781
 782                         if(0 == p)
 783                                 p = (const char *)entry_.entry + entry_.length;
 784
 785                         field_name_length_ = (unsigned)(p - (const char *)entry_.entry);
 786                         if(0 == (field_name_ = (char *)safe_malloc_add_2op_(field_name_length_, /*+*/1))) { // +1 for the trailing \0
 787                                 is_valid_ = false;
 788                                 return;
 789                         }
 790                         memcpy(field_name_, entry_.entry, field_name_length_);
 791                         field_name_[field_name_length_] = '\0';
 792
 793                         if(entry_.length - field_name_length_ == 0) {
 794                                 field_value_length_ = 0;
 795                                 if(0 == (field_value_ = (char *)safe_malloc_(0))) {
 796                                         is_valid_ = false;
 797                                         return;
 798                                 }
 799                         }
 800                         else {
 801                                 field_value_length_ = entry_.length - field_name_length_ - 1;
 802                                 if(0 == (field_value_ = (char *)safe_malloc_add_2op_(field_value_length_, /*+*/1))) { // +1 for the trailing \0
 803                                         is_valid_ = false;
 804                                         return;
 805                                 }
 806                                 memcpy(field_value_, ++p, field_value_length_);
 807                                 field_value_[field_value_length_] = '\0';
 808                         }
 809
 810                         is_valid_ = true;
 811                 }
 812
 813
 814                 //
 815                 // VorbisComment
 816                 //
 817
 818                 VorbisComment::VorbisComment():
 819                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_VORBIS_COMMENT), /*copy=*/false)
 820                 { }
 821
 822                 VorbisComment::~VorbisComment()
 823                 { }
 824
 825                 unsigned VorbisComment::get_num_comments() const
 826                 {
 827                         FLAC__ASSERT(is_valid());
 828                         return object_->data.vorbis_comment.num_comments;
 829                 }
 830
 831                 const FLAC__byte *VorbisComment::get_vendor_string() const
 832                 {
 833                         FLAC__ASSERT(is_valid());
 834                         return object_->data.vorbis_comment.vendor_string.entry;
 835                 }
 836
 837                 VorbisComment::Entry VorbisComment::get_comment(unsigned index) const
 838                 {
 839                         FLAC__ASSERT(is_valid());
 840                         FLAC__ASSERT(index < object_->data.vorbis_comment.num_comments);
 841                         return Entry((const char *)object_->data.vorbis_comment.comments[index].entry, object_->data.vorbis_comment.comments[index].length);
 842                 }
 843
 844                 bool VorbisComment::set_vendor_string(const FLAC__byte *string)
 845                 {
 846                         FLAC__ASSERT(is_valid());
 847                         // vendor_string is a special kind of entry
 848                         const ::FLAC__StreamMetadata_VorbisComment_Entry vendor_string = { static_cast<FLAC__uint32>(strlen((const char *)string)), (FLAC__byte*)string }; // we can cheat on const-ness because we make a copy below:
 849                         return (bool)::FLAC__metadata_object_vorbiscomment_set_vendor_string(object_, vendor_string, /*copy=*/true);
 850                 }
 851
 852                 bool VorbisComment::resize_comments(unsigned new_num_comments)
 853                 {
 854                         FLAC__ASSERT(is_valid());
 855                         return (bool)::FLAC__metadata_object_vorbiscomment_resize_comments(object_, new_num_comments);
 856                 }
 857
 858                 bool VorbisComment::set_comment(unsigned index, const VorbisComment::Entry &entry)
 859                 {
 860                         FLAC__ASSERT(is_valid());
 861                         FLAC__ASSERT(index < object_->data.vorbis_comment.num_comments);
 862                         return (bool)::FLAC__metadata_object_vorbiscomment_set_comment(object_, index, entry.get_entry(), /*copy=*/true);
 863                 }
 864
 865                 bool VorbisComment::insert_comment(unsigned index, const VorbisComment::Entry &entry)
 866                 {
 867                         FLAC__ASSERT(is_valid());
 868                         FLAC__ASSERT(index <= object_->data.vorbis_comment.num_comments);
 869                         return (bool)::FLAC__metadata_object_vorbiscomment_insert_comment(object_, index, entry.get_entry(), /*copy=*/true);
 870                 }
 871
 872                 bool VorbisComment::append_comment(const VorbisComment::Entry &entry)
 873                 {
 874                         FLAC__ASSERT(is_valid());
 875                         return (bool)::FLAC__metadata_object_vorbiscomment_append_comment(object_, entry.get_entry(), /*copy=*/true);
 876                 }
 877
 878                 bool VorbisComment::replace_comment(const VorbisComment::Entry &entry, bool all)
 879                 {
 880                         FLAC__ASSERT(is_valid());
 881                         return (bool)::FLAC__metadata_object_vorbiscomment_replace_comment(object_, entry.get_entry(), all, /*copy=*/true);
 882                 }
 883
 884                 bool VorbisComment::delete_comment(unsigned index)
 885                 {
 886                         FLAC__ASSERT(is_valid());
 887                         FLAC__ASSERT(index < object_->data.vorbis_comment.num_comments);
 888                         return (bool)::FLAC__metadata_object_vorbiscomment_delete_comment(object_, index);
 889                 }
 890
 891                 int VorbisComment::find_entry_from(unsigned offset, const char *field_name)
 892                 {
 893                         FLAC__ASSERT(is_valid());
 894                         return ::FLAC__metadata_object_vorbiscomment_find_entry_from(object_, offset, field_name);
 895                 }
 896
 897                 int VorbisComment::remove_entry_matching(const char *field_name)
 898                 {
 899                         FLAC__ASSERT(is_valid());
 900                         return ::FLAC__metadata_object_vorbiscomment_remove_entry_matching(object_, field_name);
 901                 }
 902
 903                 int VorbisComment::remove_entries_matching(const char *field_name)
 904                 {
 905                         FLAC__ASSERT(is_valid());
 906                         return ::FLAC__metadata_object_vorbiscomment_remove_entries_matching(object_, field_name);
 907                 }
 908
 909
 910                 //
 911                 // CueSheet::Track
 912                 //
 913
 914                 CueSheet::Track::Track():
 915                 object_(::FLAC__metadata_object_cuesheet_track_new())
 916                 { }
 917
 918                 CueSheet::Track::Track(const ::FLAC__StreamMetadata_CueSheet_Track *track):
 919                 object_(::FLAC__metadata_object_cuesheet_track_clone(track))
 920                 { }
 921
 922                 CueSheet::Track::Track(const Track &track):
 923                 object_(::FLAC__metadata_object_cuesheet_track_clone(track.object_))
 924                 { }
 925
 926                 CueSheet::Track &CueSheet::Track::operator=(const Track &track)
 927                 {
 928                         if(0 != object_)
 929                                 ::FLAC__metadata_object_cuesheet_track_delete(object_);
 930                         object_ = ::FLAC__metadata_object_cuesheet_track_clone(track.object_);
 931                         return *this;
 932                 }
 933
 934                 CueSheet::Track::~Track()
 935                 {
 936                         if(0 != object_)
 937                                 ::FLAC__metadata_object_cuesheet_track_delete(object_);
 938                 }
 939
 940                 bool CueSheet::Track::is_valid() const
 941                 {
 942                         return(0 != object_);
 943                 }
 944
 945                 ::FLAC__StreamMetadata_CueSheet_Index CueSheet::Track::get_index(unsigned i) const
 946                 {
 947                         FLAC__ASSERT(is_valid());
 948                         FLAC__ASSERT(i < object_->num_indices);
 949                         return object_->indices[i];
 950                 }
 951
 952                 void CueSheet::Track::set_isrc(const char value[12])
 953                 {
 954                         FLAC__ASSERT(is_valid());
 955                         FLAC__ASSERT(0 != value);
 956                         memcpy(object_->isrc, value, 12);
 957                         object_->isrc[12] = '\0';
 958                 }
 959
 960                 void CueSheet::Track::set_type(unsigned value)
 961                 {
 962                         FLAC__ASSERT(is_valid());
 963                         FLAC__ASSERT(value <= 1);
 964                         object_->type = value;
 965                 }
 966
 967                 void CueSheet::Track::set_index(unsigned i, const ::FLAC__StreamMetadata_CueSheet_Index &index)
 968                 {
 969                         FLAC__ASSERT(is_valid());
 970                         FLAC__ASSERT(i < object_->num_indices);
 971                         object_->indices[i] = index;
 972                 }
 973
 974
 975                 //
 976                 // CueSheet
 977                 //
 978
 979                 CueSheet::CueSheet():
 980                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_CUESHEET), /*copy=*/false)
 981                 { }
 982
 983                 CueSheet::~CueSheet()
 984                 { }
 985
 986                 const char *CueSheet::get_media_catalog_number() const
 987                 {
 988                         FLAC__ASSERT(is_valid());
 989                         return object_->data.cue_sheet.media_catalog_number;
 990                 }
 991
 992                 FLAC__uint64 CueSheet::get_lead_in() const
 993                 {
 994                         FLAC__ASSERT(is_valid());
 995                         return object_->data.cue_sheet.lead_in;
 996                 }
 997
 998                 bool CueSheet::get_is_cd() const
 999                 {
1000                         FLAC__ASSERT(is_valid());
1001                         return object_->data.cue_sheet.is_cd? true : false;
1002                 }
1003
1004                 unsigned CueSheet::get_num_tracks() const
1005                 {
1006                         FLAC__ASSERT(is_valid());
1007                         return object_->data.cue_sheet.num_tracks;
1008                 }
1009
1010                 CueSheet::Track CueSheet::get_track(unsigned i) const
1011                 {
1012                         FLAC__ASSERT(is_valid());
1013                         FLAC__ASSERT(i < object_->data.cue_sheet.num_tracks);
1014                         return Track(object_->data.cue_sheet.tracks + i);
1015                 }
1016
1017                 void CueSheet::set_media_catalog_number(const char value[128])
1018                 {
1019                         FLAC__ASSERT(is_valid());
1020                         FLAC__ASSERT(0 != value);
1021                         memcpy(object_->data.cue_sheet.media_catalog_number, value, 128);
1022                         object_->data.cue_sheet.media_catalog_number[128] = '\0';
1023                 }
1024
1025                 void CueSheet::set_lead_in(FLAC__uint64 value)
1026                 {
1027                         FLAC__ASSERT(is_valid());
1028                         object_->data.cue_sheet.lead_in = value;
1029                 }
1030
1031                 void CueSheet::set_is_cd(bool value)
1032                 {
1033                         FLAC__ASSERT(is_valid());
1034                         object_->data.cue_sheet.is_cd = value;
1035                 }
1036
1037                 void CueSheet::set_index(unsigned track_num, unsigned index_num, const ::FLAC__StreamMetadata_CueSheet_Index &index)
1038                 {
1039                         FLAC__ASSERT(is_valid());
1040                         FLAC__ASSERT(track_num < object_->data.cue_sheet.num_tracks);
1041                         FLAC__ASSERT(index_num < object_->data.cue_sheet.tracks[track_num].num_indices);
1042                         object_->data.cue_sheet.tracks[track_num].indices[index_num] = index;
1043                 }
1044
1045                 bool CueSheet::insert_index(unsigned track_num, unsigned index_num, const ::FLAC__StreamMetadata_CueSheet_Index &index)
1046                 {
1047                         FLAC__ASSERT(is_valid());
1048                         FLAC__ASSERT(track_num < object_->data.cue_sheet.num_tracks);
1049                         FLAC__ASSERT(index_num <= object_->data.cue_sheet.tracks[track_num].num_indices);
1050                         return (bool)::FLAC__metadata_object_cuesheet_track_insert_index(object_, track_num, index_num, index);
1051                 }
1052
1053                 bool CueSheet::delete_index(unsigned track_num, unsigned index_num)
1054                 {
1055                         FLAC__ASSERT(is_valid());
1056                         FLAC__ASSERT(track_num < object_->data.cue_sheet.num_tracks);
1057                         FLAC__ASSERT(index_num < object_->data.cue_sheet.tracks[track_num].num_indices);
1058                         return (bool)::FLAC__metadata_object_cuesheet_track_delete_index(object_, track_num, index_num);
1059                 }
1060
1061                 bool CueSheet::set_track(unsigned i, const CueSheet::Track &track)
1062                 {
1063                         FLAC__ASSERT(is_valid());
1064                         FLAC__ASSERT(i < object_->data.cue_sheet.num_tracks);
1065                         // We can safely const_cast since copy=true
1066                         return (bool)::FLAC__metadata_object_cuesheet_set_track(object_, i, const_cast< ::FLAC__StreamMetadata_CueSheet_Track*>(track.get_track()), /*copy=*/true);
1067                 }
1068
1069                 bool CueSheet::insert_track(unsigned i, const CueSheet::Track &track)
1070                 {
1071                         FLAC__ASSERT(is_valid());
1072                         FLAC__ASSERT(i <= object_->data.cue_sheet.num_tracks);
1073                         // We can safely const_cast since copy=true
1074                         return (bool)::FLAC__metadata_object_cuesheet_insert_track(object_, i, const_cast< ::FLAC__StreamMetadata_CueSheet_Track*>(track.get_track()), /*copy=*/true);
1075                 }
1076
1077                 bool CueSheet::delete_track(unsigned i)
1078                 {
1079                         FLAC__ASSERT(is_valid());
1080                         FLAC__ASSERT(i < object_->data.cue_sheet.num_tracks);
1081                         return (bool)::FLAC__metadata_object_cuesheet_delete_track(object_, i);
1082                 }
1083
1084                 bool CueSheet::is_legal(bool check_cd_da_subset, const char **violation) const
1085                 {
1086                         FLAC__ASSERT(is_valid());
1087                         return (bool)::FLAC__metadata_object_cuesheet_is_legal(object_, check_cd_da_subset, violation);
1088                 }
1089
1090                 FLAC__uint32 CueSheet::calculate_cddb_id() const
1091                 {
1092                         FLAC__ASSERT(is_valid());
1093                         return ::FLAC__metadata_object_cuesheet_calculate_cddb_id(object_);
1094                 }
1095
1096
1097                 //
1098                 // Picture
1099                 //
1100
1101                 Picture::Picture():
1102                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_PICTURE), /*copy=*/false)
1103                 { }
1104
1105                 Picture::~Picture()
1106                 { }
1107
1108                 ::FLAC__StreamMetadata_Picture_Type Picture::get_type() const
1109                 {
1110                         FLAC__ASSERT(is_valid());
1111                         return object_->data.picture.type;
1112                 }
1113
1114                 const char *Picture::get_mime_type() const
1115                 {
1116                         FLAC__ASSERT(is_valid());
1117                         return object_->data.picture.mime_type;
1118                 }
1119
1120                 const FLAC__byte *Picture::get_description() const
1121                 {
1122                         FLAC__ASSERT(is_valid());
1123                         return object_->data.picture.description;
1124                 }
1125
1126                 FLAC__uint32 Picture::get_width() const
1127                 {
1128                         FLAC__ASSERT(is_valid());
1129                         return object_->data.picture.width;
1130                 }
1131
1132                 FLAC__uint32 Picture::get_height() const
1133                 {
1134                         FLAC__ASSERT(is_valid());
1135                         return object_->data.picture.height;
1136                 }
1137
1138                 FLAC__uint32 Picture::get_depth() const
1139                 {
1140                         FLAC__ASSERT(is_valid());
1141                         return object_->data.picture.depth;
1142                 }
1143
1144                 FLAC__uint32 Picture::get_colors() const
1145                 {
1146                         FLAC__ASSERT(is_valid());
1147                         return object_->data.picture.colors;
1148                 }
1149
1150                 FLAC__uint32 Picture::get_data_length() const
1151                 {
1152                         FLAC__ASSERT(is_valid());
1153                         return object_->data.picture.data_length;
1154                 }
1155
1156                 const FLAC__byte *Picture::get_data() const
1157                 {
1158                         FLAC__ASSERT(is_valid());
1159                         return object_->data.picture.data;
1160                 }
1161
1162                 void Picture::set_type(::FLAC__StreamMetadata_Picture_Type type)
1163                 {
1164                         FLAC__ASSERT(is_valid());
1165                         object_->data.picture.type = type;
1166                 }
1167
1168                 bool Picture::set_mime_type(const char *string)
1169                 {
1170                         FLAC__ASSERT(is_valid());
1171                         // We can safely const_cast since copy=true
1172                         return (bool)::FLAC__metadata_object_picture_set_mime_type(object_, const_cast<char*>(string), /*copy=*/true);
1173                 }
1174
1175                 bool Picture::set_description(const FLAC__byte *string)
1176                 {
1177                         FLAC__ASSERT(is_valid());
1178                         // We can safely const_cast since copy=true
1179                         return (bool)::FLAC__metadata_object_picture_set_description(object_, const_cast<FLAC__byte*>(string), /*copy=*/true);
1180                 }
1181
1182                 void Picture::set_width(FLAC__uint32 value) const
1183                 {
1184                         FLAC__ASSERT(is_valid());
1185                         object_->data.picture.width = value;
1186                 }
1187
1188                 void Picture::set_height(FLAC__uint32 value) const
1189                 {
1190                         FLAC__ASSERT(is_valid());
1191                         object_->data.picture.height = value;
1192                 }
1193
1194                 void Picture::set_depth(FLAC__uint32 value) const
1195                 {
1196                         FLAC__ASSERT(is_valid());
1197                         object_->data.picture.depth = value;
1198                 }
1199
1200                 void Picture::set_colors(FLAC__uint32 value) const
1201                 {
1202                         FLAC__ASSERT(is_valid());
1203                         object_->data.picture.colors = value;
1204                 }
1205
1206                 bool Picture::set_data(const FLAC__byte *data, FLAC__uint32 data_length)
1207                 {
1208                         FLAC__ASSERT(is_valid());
1209                         // We can safely const_cast since copy=true
1210                         return (bool)::FLAC__metadata_object_picture_set_data(object_, const_cast<FLAC__byte*>(data), data_length, /*copy=*/true);
1211                 }
1212
1213
1214                 //
1215                 // Unknown
1216                 //
1217
1218                 Unknown::Unknown():
1219                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_APPLICATION), /*copy=*/false)
1220                 { }
1221
1222                 Unknown::~Unknown()
1223                 { }
1224
1225                 const FLAC__byte *Unknown::get_data() const
1226                 {
1227                         FLAC__ASSERT(is_valid());
1228                         return object_->data.application.data;
1229                 }
1230
1231                 bool Unknown::set_data(const FLAC__byte *data, unsigned length)
1232                 {
1233                         FLAC__ASSERT(is_valid());
1234                         return (bool)::FLAC__metadata_object_application_set_data(object_, (FLAC__byte*)data, length, true);
1235                 }
1236
1237                 bool Unknown::set_data(FLAC__byte *data, unsigned length, bool copy)
1238                 {
1239                         FLAC__ASSERT(is_valid());
1240                         return (bool)::FLAC__metadata_object_application_set_data(object_, data, length, copy);
1241                 }
1242
1243
1244                 // ============================================================
1245                 //
1246                 //  Level 0
1247                 //
1248                 // ============================================================
1249
1250                 FLACPP_API bool get_streaminfo(const char *filename, StreamInfo &streaminfo)
1251                 {
1252                         FLAC__ASSERT(0 != filename);
1253
1254                         ::FLAC__StreamMetadata object;
1255
1256                         if(::FLAC__metadata_get_streaminfo(filename, &object)) {
1257                                 streaminfo = object;
1258                                 return true;
1259                         }
1260                         else
1261                                 return false;
1262                 }
1263
1264                 FLACPP_API bool get_tags(const char *filename, VorbisComment *&tags)
1265                 {
1266                         FLAC__ASSERT(0 != filename);
1267
1268                         ::FLAC__StreamMetadata *object;
1269
1270                         tags = 0;
1271
1272                         if(::FLAC__metadata_get_tags(filename, &object)) {
1273                                 tags = new VorbisComment(object, /*copy=*/false);
1274                                 return true;
1275                         }
1276                         else
1277                                 return false;
1278                 }
1279
1280                 FLACPP_API bool get_tags(const char *filename, VorbisComment &tags)
1281                 {
1282                         FLAC__ASSERT(0 != filename);
1283
1284                         ::FLAC__StreamMetadata *object;
1285
1286                         if(::FLAC__metadata_get_tags(filename, &object)) {
1287                                 tags.assign(object, /*copy=*/false);
1288                                 return true;
1289                         }
1290                         else
1291                                 return false;
1292                 }
1293
1294                 FLACPP_API bool get_cuesheet(const char *filename, CueSheet *&cuesheet)
1295                 {
1296                         FLAC__ASSERT(0 != filename);
1297
1298                         ::FLAC__StreamMetadata *object;
1299
1300                         cuesheet = 0;
1301
1302                         if(::FLAC__metadata_get_cuesheet(filename, &object)) {
1303                                 cuesheet = new CueSheet(object, /*copy=*/false);
1304                                 return true;
1305                         }
1306                         else
1307                                 return false;
1308                 }
1309
1310                 FLACPP_API bool get_cuesheet(const char *filename, CueSheet &cuesheet)
1311                 {
1312                         FLAC__ASSERT(0 != filename);
1313
1314                         ::FLAC__StreamMetadata *object;
1315
1316                         if(::FLAC__metadata_get_cuesheet(filename, &object)) {
1317                                 cuesheet.assign(object, /*copy=*/false);
1318                                 return true;
1319                         }
1320                         else
1321                                 return false;
1322                 }
1323
1324                 FLACPP_API bool get_picture(const char *filename, Picture *&picture, ::FLAC__StreamMetadata_Picture_Type type, const char *mime_type, const FLAC__byte *description, unsigned max_width, unsigned max_height, unsigned max_depth, unsigned max_colors)
1325                 {
1326                         FLAC__ASSERT(0 != filename);
1327
1328                         ::FLAC__StreamMetadata *object;
1329
1330                         picture = 0;
1331
1332                         if(::FLAC__metadata_get_picture(filename, &object, type, mime_type, description, max_width, max_height, max_depth, max_colors)) {
1333                                 picture = new Picture(object, /*copy=*/false);
1334                                 return true;
1335                         }
1336                         else
1337                                 return false;
1338                 }
1339
1340                 FLACPP_API bool get_picture(const char *filename, Picture &picture, ::FLAC__StreamMetadata_Picture_Type type, const char *mime_type, const FLAC__byte *description, unsigned max_width, unsigned max_height, unsigned max_depth, unsigned max_colors)
1341                 {
1342                         FLAC__ASSERT(0 != filename);
1343
1344                         ::FLAC__StreamMetadata *object;
1345
1346                         if(::FLAC__metadata_get_picture(filename, &object, type, mime_type, description, max_width, max_height, max_depth, max_colors)) {
1347                                 picture.assign(object, /*copy=*/false);
1348                                 return true;
1349                         }
1350                         else
1351                                 return false;
1352                 }
1353
1354
1355                 // ============================================================
1356                 //
1357                 //  Level 1
1358                 //
1359                 // ============================================================
1360
1361                 SimpleIterator::SimpleIterator():
1362                 iterator_(::FLAC__metadata_simple_iterator_new())
1363                 { }
1364
1365                 SimpleIterator::~SimpleIterator()
1366                 {
1367                         clear();
1368                 }
1369
1370                 void SimpleIterator::clear()
1371                 {
1372                         if(0 != iterator_)
1373                                 FLAC__metadata_simple_iterator_delete(iterator_);
1374                         iterator_ = 0;
1375                 }
1376
1377                 bool SimpleIterator::init(const char *filename, bool read_only, bool preserve_file_stats)
1378                 {
1379                         FLAC__ASSERT(0 != filename);
1380                         FLAC__ASSERT(is_valid());
1381                         return (bool)::FLAC__metadata_simple_iterator_init(iterator_, filename, read_only, preserve_file_stats);
1382                 }
1383
1384                 bool SimpleIterator::is_valid() const
1385                 {
1386                         return 0 != iterator_;
1387                 }
1388
1389                 SimpleIterator::Status SimpleIterator::status()
1390                 {
1391                         FLAC__ASSERT(is_valid());
1392                         return Status(::FLAC__metadata_simple_iterator_status(iterator_));
1393                 }
1394
1395                 bool SimpleIterator::is_writable() const
1396                 {
1397                         FLAC__ASSERT(is_valid());
1398                         return (bool)::FLAC__metadata_simple_iterator_is_writable(iterator_);
1399                 }
1400
1401                 bool SimpleIterator::next()
1402                 {
1403                         FLAC__ASSERT(is_valid());
1404                         return (bool)::FLAC__metadata_simple_iterator_next(iterator_);
1405                 }
1406
1407                 bool SimpleIterator::prev()
1408                 {
1409                         FLAC__ASSERT(is_valid());
1410                         return (bool)::FLAC__metadata_simple_iterator_prev(iterator_);
1411                 }
1412
1413                 //@@@@ add to tests
1414                 bool SimpleIterator::is_last() const
1415                 {
1416                         FLAC__ASSERT(is_valid());
1417                         return (bool)::FLAC__metadata_simple_iterator_is_last(iterator_);
1418                 }
1419
1420                 //@@@@ add to tests
1421                 off_t SimpleIterator::get_block_offset() const
1422                 {
1423                         FLAC__ASSERT(is_valid());
1424                         return ::FLAC__metadata_simple_iterator_get_block_offset(iterator_);
1425                 }
1426
1427                 ::FLAC__MetadataType SimpleIterator::get_block_type() const
1428                 {
1429                         FLAC__ASSERT(is_valid());
1430                         return ::FLAC__metadata_simple_iterator_get_block_type(iterator_);
1431                 }
1432
1433                 //@@@@ add to tests
1434                 unsigned SimpleIterator::get_block_length() const
1435                 {
1436                         FLAC__ASSERT(is_valid());
1437                         return ::FLAC__metadata_simple_iterator_get_block_length(iterator_);
1438                 }
1439
1440                 //@@@@ add to tests
1441                 bool SimpleIterator::get_application_id(FLAC__byte *id)
1442                 {
1443                         FLAC__ASSERT(is_valid());
1444                         return (bool)::FLAC__metadata_simple_iterator_get_application_id(iterator_, id);
1445                 }
1446
1447                 Prototype *SimpleIterator::get_block()
1448                 {
1449                         FLAC__ASSERT(is_valid());
1450                         return local::construct_block(::FLAC__metadata_simple_iterator_get_block(iterator_));
1451                 }
1452
1453                 bool SimpleIterator::set_block(Prototype *block, bool use_padding)
1454                 {
1455                         FLAC__ASSERT(0 != block);
1456                         FLAC__ASSERT(is_valid());
1457                         return (bool)::FLAC__metadata_simple_iterator_set_block(iterator_, block->object_, use_padding);
1458                 }
1459
1460                 bool SimpleIterator::insert_block_after(Prototype *block, bool use_padding)
1461                 {
1462                         FLAC__ASSERT(0 != block);
1463                         FLAC__ASSERT(is_valid());
1464                         return (bool)::FLAC__metadata_simple_iterator_insert_block_after(iterator_, block->object_, use_padding);
1465                 }
1466
1467                 bool SimpleIterator::delete_block(bool use_padding)
1468                 {
1469                         FLAC__ASSERT(is_valid());
1470                         return (bool)::FLAC__metadata_simple_iterator_delete_block(iterator_, use_padding);
1471                 }
1472
1473
1474                 // ============================================================
1475                 //
1476                 //  Level 2
1477                 //
1478                 // ============================================================
1479
1480                 Chain::Chain():
1481                 chain_(::FLAC__metadata_chain_new())
1482                 { }
1483
1484                 Chain::~Chain()
1485                 {
1486                         clear();
1487                 }
1488
1489                 void Chain::clear()
1490                 {
1491                         if(0 != chain_)
1492                                 FLAC__metadata_chain_delete(chain_);
1493                         chain_ = 0;
1494                 }
1495
1496                 bool Chain::is_valid() const
1497                 {
1498                         return 0 != chain_;
1499                 }
1500
1501                 Chain::Status Chain::status()
1502                 {
1503                         FLAC__ASSERT(is_valid());
1504                         return Status(::FLAC__metadata_chain_status(chain_));
1505                 }
1506
1507                 bool Chain::read(const char *filename, bool is_ogg)
1508                 {
1509                         FLAC__ASSERT(0 != filename);
1510                         FLAC__ASSERT(is_valid());
1511                         return is_ogg?
1512                                 (bool)::FLAC__metadata_chain_read_ogg(chain_, filename) :
1513                                 (bool)::FLAC__metadata_chain_read(chain_, filename)
1514                         ;
1515                 }
1516
1517                 bool Chain::read(FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks, bool is_ogg)
1518                 {
1519                         FLAC__ASSERT(is_valid());
1520                         return is_ogg?
1521                                 (bool)::FLAC__metadata_chain_read_ogg_with_callbacks(chain_, handle, callbacks) :
1522                                 (bool)::FLAC__metadata_chain_read_with_callbacks(chain_, handle, callbacks)
1523                         ;
1524                 }
1525
1526                 bool Chain::check_if_tempfile_needed(bool use_padding)
1527                 {
1528                         FLAC__ASSERT(is_valid());
1529                         return (bool)::FLAC__metadata_chain_check_if_tempfile_needed(chain_, use_padding);
1530                 }
1531
1532                 bool Chain::write(bool use_padding, bool preserve_file_stats)
1533                 {
1534                         FLAC__ASSERT(is_valid());
1535                         return (bool)::FLAC__metadata_chain_write(chain_, use_padding, preserve_file_stats);
1536                 }
1537
1538                 bool Chain::write(bool use_padding, ::FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks)
1539                 {
1540                         FLAC__ASSERT(is_valid());
1541                         return (bool)::FLAC__metadata_chain_write_with_callbacks(chain_, use_padding, handle, callbacks);
1542                 }
1543
1544                 bool Chain::write(bool use_padding, ::FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks, ::FLAC__IOHandle temp_handle, ::FLAC__IOCallbacks temp_callbacks)
1545                 {
1546                         FLAC__ASSERT(is_valid());
1547                         return (bool)::FLAC__metadata_chain_write_with_callbacks_and_tempfile(chain_, use_padding, handle, callbacks, temp_handle, temp_callbacks);
1548                 }
1549
1550                 void Chain::merge_padding()
1551                 {
1552                         FLAC__ASSERT(is_valid());
1553                         ::FLAC__metadata_chain_merge_padding(chain_);
1554                 }
1555
1556                 void Chain::sort_padding()
1557                 {
1558                         FLAC__ASSERT(is_valid());
1559                         ::FLAC__metadata_chain_sort_padding(chain_);
1560                 }
1561
1562
1563                 Iterator::Iterator():
1564                 iterator_(::FLAC__metadata_iterator_new())
1565                 { }
1566
1567                 Iterator::~Iterator()
1568                 {
1569                         clear();
1570                 }
1571
1572                 void Iterator::clear()
1573                 {
1574                         if(0 != iterator_)
1575                                 FLAC__metadata_iterator_delete(iterator_);
1576                         iterator_ = 0;
1577                 }
1578
1579                 bool Iterator::is_valid() const
1580                 {
1581                         return 0 != iterator_;
1582                 }
1583
1584                 void Iterator::init(Chain &chain)
1585                 {
1586                         FLAC__ASSERT(is_valid());
1587                         FLAC__ASSERT(chain.is_valid());
1588                         ::FLAC__metadata_iterator_init(iterator_, chain.chain_);
1589                 }
1590
1591                 bool Iterator::next()
1592                 {
1593                         FLAC__ASSERT(is_valid());
1594                         return (bool)::FLAC__metadata_iterator_next(iterator_);
1595                 }
1596
1597                 bool Iterator::prev()
1598                 {
1599                         FLAC__ASSERT(is_valid());
1600                         return (bool)::FLAC__metadata_iterator_prev(iterator_);
1601                 }
1602
1603                 ::FLAC__MetadataType Iterator::get_block_type() const
1604                 {
1605                         FLAC__ASSERT(is_valid());
1606                         return ::FLAC__metadata_iterator_get_block_type(iterator_);
1607                 }
1608
1609                 Prototype *Iterator::get_block()
1610                 {
1611                         FLAC__ASSERT(is_valid());
1612                         Prototype *block = local::construct_block(::FLAC__metadata_iterator_get_block(iterator_));
1613                         if(0 != block)
1614                                 block->set_reference(true);
1615                         return block;
1616                 }
1617
1618                 bool Iterator::set_block(Prototype *block)
1619                 {
1620                         FLAC__ASSERT(0 != block);
1621                         FLAC__ASSERT(is_valid());
1622                         bool ret = (bool)::FLAC__metadata_iterator_set_block(iterator_, block->object_);
1623                         if(ret) {
1624                                 block->set_reference(true);
1625                                 delete block;
1626                         }
1627                         return ret;
1628                 }
1629
1630                 bool Iterator::delete_block(bool replace_with_padding)
1631                 {
1632                         FLAC__ASSERT(is_valid());
1633                         return (bool)::FLAC__metadata_iterator_delete_block(iterator_, replace_with_padding);
1634                 }
1635
1636                 bool Iterator::insert_block_before(Prototype *block)
1637                 {
1638                         FLAC__ASSERT(0 != block);
1639                         FLAC__ASSERT(is_valid());
1640                         bool ret = (bool)::FLAC__metadata_iterator_insert_block_before(iterator_, block->object_);
1641                         if(ret) {
1642                                 block->set_reference(true);
1643                                 delete block;
1644                         }
1645                         return ret;
1646                 }
1647
1648                 bool Iterator::insert_block_after(Prototype *block)
1649                 {
1650                         FLAC__ASSERT(0 != block);
1651                         FLAC__ASSERT(is_valid());
1652                         bool ret = (bool)::FLAC__metadata_iterator_insert_block_after(iterator_, block->object_);
1653                         if(ret) {
1654                                 block->set_reference(true);
1655                                 delete block;
1656                         }
1657                         return ret;
1658                 }
1659
1660         }
1661 }