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 = { 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::set_comment(unsigned index, const VorbisComment::Entry &entry)
 853                 {
 854                         FLAC__ASSERT(is_valid());
 855                         FLAC__ASSERT(index < object_->data.vorbis_comment.num_comments);
 856                         return (bool)::FLAC__metadata_object_vorbiscomment_set_comment(object_, index, entry.get_entry(), /*copy=*/true);
 857                 }
 858
 859                 bool VorbisComment::insert_comment(unsigned index, const VorbisComment::Entry &entry)
 860                 {
 861                         FLAC__ASSERT(is_valid());
 862                         FLAC__ASSERT(index <= object_->data.vorbis_comment.num_comments);
 863                         return (bool)::FLAC__metadata_object_vorbiscomment_insert_comment(object_, index, entry.get_entry(), /*copy=*/true);
 864                 }
 865
 866                 bool VorbisComment::append_comment(const VorbisComment::Entry &entry)
 867                 {
 868                         FLAC__ASSERT(is_valid());
 869                         return (bool)::FLAC__metadata_object_vorbiscomment_append_comment(object_, entry.get_entry(), /*copy=*/true);
 870                 }
 871
 872                 bool VorbisComment::delete_comment(unsigned index)
 873                 {
 874                         FLAC__ASSERT(is_valid());
 875                         FLAC__ASSERT(index < object_->data.vorbis_comment.num_comments);
 876                         return (bool)::FLAC__metadata_object_vorbiscomment_delete_comment(object_, index);
 877                 }
 878
 879
 880                 //
 881                 // CueSheet::Track
 882                 //
 883
 884                 CueSheet::Track::Track():
 885                 object_(::FLAC__metadata_object_cuesheet_track_new())
 886                 { }
 887
 888                 CueSheet::Track::Track(const ::FLAC__StreamMetadata_CueSheet_Track *track):
 889                 object_(::FLAC__metadata_object_cuesheet_track_clone(track))
 890                 { }
 891
 892                 CueSheet::Track::Track(const Track &track):
 893                 object_(::FLAC__metadata_object_cuesheet_track_clone(track.object_))
 894                 { }
 895
 896                 CueSheet::Track &CueSheet::Track::operator=(const Track &track)
 897                 {
 898                         if(0 != object_)
 899                                 ::FLAC__metadata_object_cuesheet_track_delete(object_);
 900                         object_ = ::FLAC__metadata_object_cuesheet_track_clone(track.object_);
 901                         return *this;
 902                 }
 903
 904                 CueSheet::Track::~Track()
 905                 {
 906                         if(0 != object_)
 907                                 ::FLAC__metadata_object_cuesheet_track_delete(object_);
 908                 }
 909
 910                 bool CueSheet::Track::is_valid() const
 911                 {
 912                         return(0 != object_);
 913                 }
 914
 915                 ::FLAC__StreamMetadata_CueSheet_Index CueSheet::Track::get_index(unsigned i) const
 916                 {
 917                         FLAC__ASSERT(is_valid());
 918                         FLAC__ASSERT(i < object_->num_indices);
 919                         return object_->indices[i];
 920                 }
 921
 922                 void CueSheet::Track::set_isrc(const char value[12])
 923                 {
 924                         FLAC__ASSERT(is_valid());
 925                         FLAC__ASSERT(0 != value);
 926                         memcpy(object_->isrc, value, 12);
 927                         object_->isrc[12] = '\0';
 928                 }
 929
 930                 void CueSheet::Track::set_type(unsigned value)
 931                 {
 932                         FLAC__ASSERT(is_valid());
 933                         FLAC__ASSERT(value <= 1);
 934                         object_->type = value;
 935                 }
 936
 937                 void CueSheet::Track::set_index(unsigned i, const ::FLAC__StreamMetadata_CueSheet_Index &index)
 938                 {
 939                         FLAC__ASSERT(is_valid());
 940                         FLAC__ASSERT(i < object_->num_indices);
 941                         object_->indices[i] = index;
 942                 }
 943
 944
 945                 //
 946                 // CueSheet
 947                 //
 948
 949                 CueSheet::CueSheet():
 950                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_CUESHEET), /*copy=*/false)
 951                 { }
 952
 953                 CueSheet::~CueSheet()
 954                 { }
 955
 956                 const char *CueSheet::get_media_catalog_number() const
 957                 {
 958                         FLAC__ASSERT(is_valid());
 959                         return object_->data.cue_sheet.media_catalog_number;
 960                 }
 961
 962                 FLAC__uint64 CueSheet::get_lead_in() const
 963                 {
 964                         FLAC__ASSERT(is_valid());
 965                         return object_->data.cue_sheet.lead_in;
 966                 }
 967
 968                 bool CueSheet::get_is_cd() const
 969                 {
 970                         FLAC__ASSERT(is_valid());
 971                         return object_->data.cue_sheet.is_cd? true : false;
 972                 }
 973
 974                 unsigned CueSheet::get_num_tracks() const
 975                 {
 976                         FLAC__ASSERT(is_valid());
 977                         return object_->data.cue_sheet.num_tracks;
 978                 }
 979
 980                 CueSheet::Track CueSheet::get_track(unsigned i) const
 981                 {
 982                         FLAC__ASSERT(is_valid());
 983                         FLAC__ASSERT(i < object_->data.cue_sheet.num_tracks);
 984                         return Track(object_->data.cue_sheet.tracks + i);
 985                 }
 986
 987                 void CueSheet::set_media_catalog_number(const char value[128])
 988                 {
 989                         FLAC__ASSERT(is_valid());
 990                         FLAC__ASSERT(0 != value);
 991                         memcpy(object_->data.cue_sheet.media_catalog_number, value, 128);
 992                         object_->data.cue_sheet.media_catalog_number[128] = '\0';
 993                 }
 994
 995                 void CueSheet::set_lead_in(FLAC__uint64 value)
 996                 {
 997                         FLAC__ASSERT(is_valid());
 998                         object_->data.cue_sheet.lead_in = value;
 999                 }
1000
1001                 void CueSheet::set_is_cd(bool value)
1002                 {
1003                         FLAC__ASSERT(is_valid());
1004                         object_->data.cue_sheet.is_cd = value;
1005                 }
1006
1007                 void CueSheet::set_index(unsigned track_num, unsigned index_num, const ::FLAC__StreamMetadata_CueSheet_Index &index)
1008                 {
1009                         FLAC__ASSERT(is_valid());
1010                         FLAC__ASSERT(track_num < object_->data.cue_sheet.num_tracks);
1011                         FLAC__ASSERT(index_num < object_->data.cue_sheet.tracks[track_num].num_indices);
1012                         object_->data.cue_sheet.tracks[track_num].indices[index_num] = index;
1013                 }
1014
1015                 bool CueSheet::insert_index(unsigned track_num, unsigned index_num, const ::FLAC__StreamMetadata_CueSheet_Index &index)
1016                 {
1017                         FLAC__ASSERT(is_valid());
1018                         FLAC__ASSERT(track_num < object_->data.cue_sheet.num_tracks);
1019                         FLAC__ASSERT(index_num <= object_->data.cue_sheet.tracks[track_num].num_indices);
1020                         return (bool)::FLAC__metadata_object_cuesheet_track_insert_index(object_, track_num, index_num, index);
1021                 }
1022
1023                 bool CueSheet::delete_index(unsigned track_num, unsigned index_num)
1024                 {
1025                         FLAC__ASSERT(is_valid());
1026                         FLAC__ASSERT(track_num < object_->data.cue_sheet.num_tracks);
1027                         FLAC__ASSERT(index_num < object_->data.cue_sheet.tracks[track_num].num_indices);
1028                         return (bool)::FLAC__metadata_object_cuesheet_track_delete_index(object_, track_num, index_num);
1029                 }
1030
1031                 bool CueSheet::set_track(unsigned i, const CueSheet::Track &track)
1032                 {
1033                         FLAC__ASSERT(is_valid());
1034                         FLAC__ASSERT(i < object_->data.cue_sheet.num_tracks);
1035                         // We can safely const_cast since copy=true
1036                         return (bool)::FLAC__metadata_object_cuesheet_set_track(object_, i, const_cast< ::FLAC__StreamMetadata_CueSheet_Track*>(track.get_track()), /*copy=*/true);
1037                 }
1038
1039                 bool CueSheet::insert_track(unsigned i, const CueSheet::Track &track)
1040                 {
1041                         FLAC__ASSERT(is_valid());
1042                         FLAC__ASSERT(i <= object_->data.cue_sheet.num_tracks);
1043                         // We can safely const_cast since copy=true
1044                         return (bool)::FLAC__metadata_object_cuesheet_insert_track(object_, i, const_cast< ::FLAC__StreamMetadata_CueSheet_Track*>(track.get_track()), /*copy=*/true);
1045                 }
1046
1047                 bool CueSheet::delete_track(unsigned i)
1048                 {
1049                         FLAC__ASSERT(is_valid());
1050                         FLAC__ASSERT(i < object_->data.cue_sheet.num_tracks);
1051                         return (bool)::FLAC__metadata_object_cuesheet_delete_track(object_, i);
1052                 }
1053
1054                 bool CueSheet::is_legal(bool check_cd_da_subset, const char **violation) const
1055                 {
1056                         FLAC__ASSERT(is_valid());
1057                         return (bool)::FLAC__metadata_object_cuesheet_is_legal(object_, check_cd_da_subset, violation);
1058                 }
1059
1060                 FLAC__uint32 CueSheet::calculate_cddb_id() const
1061                 {
1062                         FLAC__ASSERT(is_valid());
1063                         return ::FLAC__metadata_object_cuesheet_calculate_cddb_id(object_);
1064                 }
1065
1066
1067                 //
1068                 // Picture
1069                 //
1070
1071                 Picture::Picture():
1072                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_PICTURE), /*copy=*/false)
1073                 { }
1074
1075                 Picture::~Picture()
1076                 { }
1077
1078                 ::FLAC__StreamMetadata_Picture_Type Picture::get_type() const
1079                 {
1080                         FLAC__ASSERT(is_valid());
1081                         return object_->data.picture.type;
1082                 }
1083
1084                 const char *Picture::get_mime_type() const
1085                 {
1086                         FLAC__ASSERT(is_valid());
1087                         return object_->data.picture.mime_type;
1088                 }
1089
1090                 const FLAC__byte *Picture::get_description() const
1091                 {
1092                         FLAC__ASSERT(is_valid());
1093                         return object_->data.picture.description;
1094                 }
1095
1096                 FLAC__uint32 Picture::get_width() const
1097                 {
1098                         FLAC__ASSERT(is_valid());
1099                         return object_->data.picture.width;
1100                 }
1101
1102                 FLAC__uint32 Picture::get_height() const
1103                 {
1104                         FLAC__ASSERT(is_valid());
1105                         return object_->data.picture.height;
1106                 }
1107
1108                 FLAC__uint32 Picture::get_depth() const
1109                 {
1110                         FLAC__ASSERT(is_valid());
1111                         return object_->data.picture.depth;
1112                 }
1113
1114                 FLAC__uint32 Picture::get_colors() const
1115                 {
1116                         FLAC__ASSERT(is_valid());
1117                         return object_->data.picture.colors;
1118                 }
1119
1120                 FLAC__uint32 Picture::get_data_length() const
1121                 {
1122                         FLAC__ASSERT(is_valid());
1123                         return object_->data.picture.data_length;
1124                 }
1125
1126                 const FLAC__byte *Picture::get_data() const
1127                 {
1128                         FLAC__ASSERT(is_valid());
1129                         return object_->data.picture.data;
1130                 }
1131
1132                 void Picture::set_type(::FLAC__StreamMetadata_Picture_Type type)
1133                 {
1134                         FLAC__ASSERT(is_valid());
1135                         object_->data.picture.type = type;
1136                 }
1137
1138                 bool Picture::set_mime_type(const char *string)
1139                 {
1140                         FLAC__ASSERT(is_valid());
1141                         // We can safely const_cast since copy=true
1142                         return (bool)::FLAC__metadata_object_picture_set_mime_type(object_, const_cast<char*>(string), /*copy=*/true);
1143                 }
1144
1145                 bool Picture::set_description(const FLAC__byte *string)
1146                 {
1147                         FLAC__ASSERT(is_valid());
1148                         // We can safely const_cast since copy=true
1149                         return (bool)::FLAC__metadata_object_picture_set_description(object_, const_cast<FLAC__byte*>(string), /*copy=*/true);
1150                 }
1151
1152                 void Picture::set_width(FLAC__uint32 value) const
1153                 {
1154                         FLAC__ASSERT(is_valid());
1155                         object_->data.picture.width = value;
1156                 }
1157
1158                 void Picture::set_height(FLAC__uint32 value) const
1159                 {
1160                         FLAC__ASSERT(is_valid());
1161                         object_->data.picture.height = value;
1162                 }
1163
1164                 void Picture::set_depth(FLAC__uint32 value) const
1165                 {
1166                         FLAC__ASSERT(is_valid());
1167                         object_->data.picture.depth = value;
1168                 }
1169
1170                 void Picture::set_colors(FLAC__uint32 value) const
1171                 {
1172                         FLAC__ASSERT(is_valid());
1173                         object_->data.picture.colors = value;
1174                 }
1175
1176                 bool Picture::set_data(const FLAC__byte *data, FLAC__uint32 data_length)
1177                 {
1178                         FLAC__ASSERT(is_valid());
1179                         // We can safely const_cast since copy=true
1180                         return (bool)::FLAC__metadata_object_picture_set_data(object_, const_cast<FLAC__byte*>(data), data_length, /*copy=*/true);
1181                 }
1182
1183
1184                 //
1185                 // Unknown
1186                 //
1187
1188                 Unknown::Unknown():
1189                 Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_APPLICATION), /*copy=*/false)
1190                 { }
1191
1192                 Unknown::~Unknown()
1193                 { }
1194
1195                 const FLAC__byte *Unknown::get_data() const
1196                 {
1197                         FLAC__ASSERT(is_valid());
1198                         return object_->data.application.data;
1199                 }
1200
1201                 bool Unknown::set_data(const FLAC__byte *data, unsigned length)
1202                 {
1203                         FLAC__ASSERT(is_valid());
1204                         return (bool)::FLAC__metadata_object_application_set_data(object_, (FLAC__byte*)data, length, true);
1205                 }
1206
1207                 bool Unknown::set_data(FLAC__byte *data, unsigned length, bool copy)
1208                 {
1209                         FLAC__ASSERT(is_valid());
1210                         return (bool)::FLAC__metadata_object_application_set_data(object_, data, length, copy);
1211                 }
1212
1213
1214                 // ============================================================
1215                 //
1216                 //  Level 0
1217                 //
1218                 // ============================================================
1219
1220                 FLACPP_API bool get_streaminfo(const char *filename, StreamInfo &streaminfo)
1221                 {
1222                         FLAC__ASSERT(0 != filename);
1223
1224                         ::FLAC__StreamMetadata object;
1225
1226                         if(::FLAC__metadata_get_streaminfo(filename, &object)) {
1227                                 streaminfo = object;
1228                                 return true;
1229                         }
1230                         else
1231                                 return false;
1232                 }
1233
1234                 FLACPP_API bool get_tags(const char *filename, VorbisComment *&tags)
1235                 {
1236                         FLAC__ASSERT(0 != filename);
1237
1238                         ::FLAC__StreamMetadata *object;
1239
1240                         tags = 0;
1241
1242                         if(::FLAC__metadata_get_tags(filename, &object)) {
1243                                 tags = new VorbisComment(object, /*copy=*/false);
1244                                 return true;
1245                         }
1246                         else
1247                                 return false;
1248                 }
1249
1250                 FLACPP_API bool get_tags(const char *filename, VorbisComment &tags)
1251                 {
1252                         FLAC__ASSERT(0 != filename);
1253
1254                         ::FLAC__StreamMetadata *object;
1255
1256                         if(::FLAC__metadata_get_tags(filename, &object)) {
1257                                 tags.assign(object, /*copy=*/false);
1258                                 return true;
1259                         }
1260                         else
1261                                 return false;
1262                 }
1263
1264                 FLACPP_API bool get_cuesheet(const char *filename, CueSheet *&cuesheet)
1265                 {
1266                         FLAC__ASSERT(0 != filename);
1267
1268                         ::FLAC__StreamMetadata *object;
1269
1270                         cuesheet = 0;
1271
1272                         if(::FLAC__metadata_get_cuesheet(filename, &object)) {
1273                                 cuesheet = new CueSheet(object, /*copy=*/false);
1274                                 return true;
1275                         }
1276                         else
1277                                 return false;
1278                 }
1279
1280                 FLACPP_API bool get_cuesheet(const char *filename, CueSheet &cuesheet)
1281                 {
1282                         FLAC__ASSERT(0 != filename);
1283
1284                         ::FLAC__StreamMetadata *object;
1285
1286                         if(::FLAC__metadata_get_cuesheet(filename, &object)) {
1287                                 cuesheet.assign(object, /*copy=*/false);
1288                                 return true;
1289                         }
1290                         else
1291                                 return false;
1292                 }
1293
1294                 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)
1295                 {
1296                         FLAC__ASSERT(0 != filename);
1297
1298                         ::FLAC__StreamMetadata *object;
1299
1300                         picture = 0;
1301
1302                         if(::FLAC__metadata_get_picture(filename, &object, type, mime_type, description, max_width, max_height, max_depth, max_colors)) {
1303                                 picture = new Picture(object, /*copy=*/false);
1304                                 return true;
1305                         }
1306                         else
1307                                 return false;
1308                 }
1309
1310                 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)
1311                 {
1312                         FLAC__ASSERT(0 != filename);
1313
1314                         ::FLAC__StreamMetadata *object;
1315
1316                         if(::FLAC__metadata_get_picture(filename, &object, type, mime_type, description, max_width, max_height, max_depth, max_colors)) {
1317                                 picture.assign(object, /*copy=*/false);
1318                                 return true;
1319                         }
1320                         else
1321                                 return false;
1322                 }
1323
1324
1325                 // ============================================================
1326                 //
1327                 //  Level 1
1328                 //
1329                 // ============================================================
1330
1331                 SimpleIterator::SimpleIterator():
1332                 iterator_(::FLAC__metadata_simple_iterator_new())
1333                 { }
1334
1335                 SimpleIterator::~SimpleIterator()
1336                 {
1337                         clear();
1338                 }
1339
1340                 void SimpleIterator::clear()
1341                 {
1342                         if(0 != iterator_)
1343                                 FLAC__metadata_simple_iterator_delete(iterator_);
1344                         iterator_ = 0;
1345                 }
1346
1347                 bool SimpleIterator::init(const char *filename, bool read_only, bool preserve_file_stats)
1348                 {
1349                         FLAC__ASSERT(0 != filename);
1350                         FLAC__ASSERT(is_valid());
1351                         return (bool)::FLAC__metadata_simple_iterator_init(iterator_, filename, read_only, preserve_file_stats);
1352                 }
1353
1354                 bool SimpleIterator::is_valid() const
1355                 {
1356                         return 0 != iterator_;
1357                 }
1358
1359                 SimpleIterator::Status SimpleIterator::status()
1360                 {
1361                         FLAC__ASSERT(is_valid());
1362                         return Status(::FLAC__metadata_simple_iterator_status(iterator_));
1363                 }
1364
1365                 bool SimpleIterator::is_writable() const
1366                 {
1367                         FLAC__ASSERT(is_valid());
1368                         return (bool)::FLAC__metadata_simple_iterator_is_writable(iterator_);
1369                 }
1370
1371                 bool SimpleIterator::next()
1372                 {
1373                         FLAC__ASSERT(is_valid());
1374                         return (bool)::FLAC__metadata_simple_iterator_next(iterator_);
1375                 }
1376
1377                 bool SimpleIterator::prev()
1378                 {
1379                         FLAC__ASSERT(is_valid());
1380                         return (bool)::FLAC__metadata_simple_iterator_prev(iterator_);
1381                 }
1382
1383                 //@@@@ add to tests
1384                 bool SimpleIterator::is_last() const
1385                 {
1386                         FLAC__ASSERT(is_valid());
1387                         return (bool)::FLAC__metadata_simple_iterator_is_last(iterator_);
1388                 }
1389
1390                 //@@@@ add to tests
1391                 off_t SimpleIterator::get_block_offset() const
1392                 {
1393                         FLAC__ASSERT(is_valid());
1394                         return ::FLAC__metadata_simple_iterator_get_block_offset(iterator_);
1395                 }
1396
1397                 ::FLAC__MetadataType SimpleIterator::get_block_type() const
1398                 {
1399                         FLAC__ASSERT(is_valid());
1400                         return ::FLAC__metadata_simple_iterator_get_block_type(iterator_);
1401                 }
1402
1403                 //@@@@ add to tests
1404                 unsigned SimpleIterator::get_block_length() const
1405                 {
1406                         FLAC__ASSERT(is_valid());
1407                         return ::FLAC__metadata_simple_iterator_get_block_length(iterator_);
1408                 }
1409
1410                 //@@@@ add to tests
1411                 bool SimpleIterator::get_application_id(FLAC__byte *id)
1412                 {
1413                         FLAC__ASSERT(is_valid());
1414                         return (bool)::FLAC__metadata_simple_iterator_get_application_id(iterator_, id);
1415                 }
1416
1417                 Prototype *SimpleIterator::get_block()
1418                 {
1419                         FLAC__ASSERT(is_valid());
1420                         return local::construct_block(::FLAC__metadata_simple_iterator_get_block(iterator_));
1421                 }
1422
1423                 bool SimpleIterator::set_block(Prototype *block, bool use_padding)
1424                 {
1425                         FLAC__ASSERT(0 != block);
1426                         FLAC__ASSERT(is_valid());
1427                         return (bool)::FLAC__metadata_simple_iterator_set_block(iterator_, block->object_, use_padding);
1428                 }
1429
1430                 bool SimpleIterator::insert_block_after(Prototype *block, bool use_padding)
1431                 {
1432                         FLAC__ASSERT(0 != block);
1433                         FLAC__ASSERT(is_valid());
1434                         return (bool)::FLAC__metadata_simple_iterator_insert_block_after(iterator_, block->object_, use_padding);
1435                 }
1436
1437                 bool SimpleIterator::delete_block(bool use_padding)
1438                 {
1439                         FLAC__ASSERT(is_valid());
1440                         return (bool)::FLAC__metadata_simple_iterator_delete_block(iterator_, use_padding);
1441                 }
1442
1443
1444                 // ============================================================
1445                 //
1446                 //  Level 2
1447                 //
1448                 // ============================================================
1449
1450                 Chain::Chain():
1451                 chain_(::FLAC__metadata_chain_new())
1452                 { }
1453
1454                 Chain::~Chain()
1455                 {
1456                         clear();
1457                 }
1458
1459                 void Chain::clear()
1460                 {
1461                         if(0 != chain_)
1462                                 FLAC__metadata_chain_delete(chain_);
1463                         chain_ = 0;
1464                 }
1465
1466                 bool Chain::is_valid() const
1467                 {
1468                         return 0 != chain_;
1469                 }
1470
1471                 Chain::Status Chain::status()
1472                 {
1473                         FLAC__ASSERT(is_valid());
1474                         return Status(::FLAC__metadata_chain_status(chain_));
1475                 }
1476
1477                 bool Chain::read(const char *filename, bool is_ogg)
1478                 {
1479                         FLAC__ASSERT(0 != filename);
1480                         FLAC__ASSERT(is_valid());
1481                         return is_ogg?
1482                                 (bool)::FLAC__metadata_chain_read_ogg(chain_, filename) :
1483                                 (bool)::FLAC__metadata_chain_read(chain_, filename)
1484                         ;
1485                 }
1486
1487                 bool Chain::read(FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks, bool is_ogg)
1488                 {
1489                         FLAC__ASSERT(is_valid());
1490                         return is_ogg?
1491                                 (bool)::FLAC__metadata_chain_read_ogg_with_callbacks(chain_, handle, callbacks) :
1492                                 (bool)::FLAC__metadata_chain_read_with_callbacks(chain_, handle, callbacks)
1493                         ;
1494                 }
1495
1496                 bool Chain::check_if_tempfile_needed(bool use_padding)
1497                 {
1498                         FLAC__ASSERT(is_valid());
1499                         return (bool)::FLAC__metadata_chain_check_if_tempfile_needed(chain_, use_padding);
1500                 }
1501
1502                 bool Chain::write(bool use_padding, bool preserve_file_stats)
1503                 {
1504                         FLAC__ASSERT(is_valid());
1505                         return (bool)::FLAC__metadata_chain_write(chain_, use_padding, preserve_file_stats);
1506                 }
1507
1508                 bool Chain::write(bool use_padding, ::FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks)
1509                 {
1510                         FLAC__ASSERT(is_valid());
1511                         return (bool)::FLAC__metadata_chain_write_with_callbacks(chain_, use_padding, handle, callbacks);
1512                 }
1513
1514                 bool Chain::write(bool use_padding, ::FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks, ::FLAC__IOHandle temp_handle, ::FLAC__IOCallbacks temp_callbacks)
1515                 {
1516                         FLAC__ASSERT(is_valid());
1517                         return (bool)::FLAC__metadata_chain_write_with_callbacks_and_tempfile(chain_, use_padding, handle, callbacks, temp_handle, temp_callbacks);
1518                 }
1519
1520                 void Chain::merge_padding()
1521                 {
1522                         FLAC__ASSERT(is_valid());
1523                         ::FLAC__metadata_chain_merge_padding(chain_);
1524                 }
1525
1526                 void Chain::sort_padding()
1527                 {
1528                         FLAC__ASSERT(is_valid());
1529                         ::FLAC__metadata_chain_sort_padding(chain_);
1530                 }
1531
1532
1533                 Iterator::Iterator():
1534                 iterator_(::FLAC__metadata_iterator_new())
1535                 { }
1536
1537                 Iterator::~Iterator()
1538                 {
1539                         clear();
1540                 }
1541
1542                 void Iterator::clear()
1543                 {
1544                         if(0 != iterator_)
1545                                 FLAC__metadata_iterator_delete(iterator_);
1546                         iterator_ = 0;
1547                 }
1548
1549                 bool Iterator::is_valid() const
1550                 {
1551                         return 0 != iterator_;
1552                 }
1553
1554                 void Iterator::init(Chain &chain)
1555                 {
1556                         FLAC__ASSERT(is_valid());
1557                         FLAC__ASSERT(chain.is_valid());
1558                         ::FLAC__metadata_iterator_init(iterator_, chain.chain_);
1559                 }
1560
1561                 bool Iterator::next()
1562                 {
1563                         FLAC__ASSERT(is_valid());
1564                         return (bool)::FLAC__metadata_iterator_next(iterator_);
1565                 }
1566
1567                 bool Iterator::prev()
1568                 {
1569                         FLAC__ASSERT(is_valid());
1570                         return (bool)::FLAC__metadata_iterator_prev(iterator_);
1571                 }
1572
1573                 ::FLAC__MetadataType Iterator::get_block_type() const
1574                 {
1575                         FLAC__ASSERT(is_valid());
1576                         return ::FLAC__metadata_iterator_get_block_type(iterator_);
1577                 }
1578
1579                 Prototype *Iterator::get_block()
1580                 {
1581                         FLAC__ASSERT(is_valid());
1582                         Prototype *block = local::construct_block(::FLAC__metadata_iterator_get_block(iterator_));
1583                         if(0 != block)
1584                                 block->set_reference(true);
1585                         return block;
1586                 }
1587
1588                 bool Iterator::set_block(Prototype *block)
1589                 {
1590                         FLAC__ASSERT(0 != block);
1591                         FLAC__ASSERT(is_valid());
1592                         bool ret = (bool)::FLAC__metadata_iterator_set_block(iterator_, block->object_);
1593                         if(ret) {
1594                                 block->set_reference(true);
1595                                 delete block;
1596                         }
1597                         return ret;
1598                 }
1599
1600                 bool Iterator::delete_block(bool replace_with_padding)
1601                 {
1602                         FLAC__ASSERT(is_valid());
1603                         return (bool)::FLAC__metadata_iterator_delete_block(iterator_, replace_with_padding);
1604                 }
1605
1606                 bool Iterator::insert_block_before(Prototype *block)
1607                 {
1608                         FLAC__ASSERT(0 != block);
1609                         FLAC__ASSERT(is_valid());
1610                         bool ret = (bool)::FLAC__metadata_iterator_insert_block_before(iterator_, block->object_);
1611                         if(ret) {
1612                                 block->set_reference(true);
1613                                 delete block;
1614                         }
1615                         return ret;
1616                 }
1617
1618                 bool Iterator::insert_block_after(Prototype *block)
1619                 {
1620                         FLAC__ASSERT(0 != block);
1621                         FLAC__ASSERT(is_valid());
1622                         bool ret = (bool)::FLAC__metadata_iterator_insert_block_after(iterator_, block->object_);
1623                         if(ret) {
1624                                 block->set_reference(true);
1625                                 delete block;
1626                         }
1627                         return ret;
1628                 }
1629
1630         }
1631 }