granicus.if.org Git - imagemagick/blob - coders/heic.c

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                        H   H  EEEEE  IIIII   CCCC                           %
   7 %                        H   H  E        I    C                               %
   8 %                        HHHHH  EEE      I    C                               %
   9 %                        H   H  E        I    C                               %
  10 %                        H   H  EEEEE  IIIII   CCCC                           %
  11 %                                                                             %
  12 %                                                                             %
  13 %                        Read/Write Heic Image Format                         %
  14 %                                                                             %
  15 %                                 Dirk Farin                                  %
  16 %                                 April 2018                                  %
  17 %                                                                             %
  18 %                         Copyright 2018 Struktur AG                          %
  19 %                                                                             %
  20 %                               Anton Kortunov                                %
  21 %                               December 2017                                 %
  22 %                                                                             %
  23 %                      Copyright 2017-2018 YANDEX LLC.                        %
  24 %                                                                             %
  25 %  You may not use this file except in compliance with the License.  You may  %
  26 %  obtain a copy of the License at                                            %
  27 %                                                                             %
  28 %    https://www.imagemagick.org/script/license.php                           %
  29 %                                                                             %
  30 %  Unless required by applicable law or agreed to in writing, software        %
  31 %  distributed under the License is distributed on an "AS IS" BASIS,          %
  32 %  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
  33 %  See the License for the specific language governing permissions and        %
  34 %  limitations under the License.                                             %
  35 %                                                                             %
  36 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  37 %
  38 %
  39 */
  40
  41 /*
  42   Include declarations.
  43 */
  44 #include "MagickCore/studio.h"
  45 #include "MagickCore/artifact.h"
  46 #include "MagickCore/blob.h"
  47 #include "MagickCore/blob-private.h"
  48 #include "MagickCore/client.h"
  49 #include "MagickCore/colorspace-private.h"
  50 #include "MagickCore/property.h"
  51 #include "MagickCore/display.h"
  52 #include "MagickCore/exception.h"
  53 #include "MagickCore/exception-private.h"
  54 #include "MagickCore/image.h"
  55 #include "MagickCore/image-private.h"
  56 #include "MagickCore/list.h"
  57 #include "MagickCore/magick.h"
  58 #include "MagickCore/monitor.h"
  59 #include "MagickCore/monitor-private.h"
  60 #include "MagickCore/montage.h"
  61 #include "MagickCore/transform.h"
  62 #include "MagickCore/memory_.h"
  63 #include "MagickCore/memory-private.h"
  64 #include "MagickCore/option.h"
  65 #include "MagickCore/pixel-accessor.h"
  66 #include "MagickCore/quantum-private.h"
  67 #include "MagickCore/static.h"
  68 #include "MagickCore/string_.h"
  69 #include "MagickCore/string-private.h"
  70 #include "MagickCore/module.h"
  71 #include "MagickCore/utility.h"
  72 #if defined(MAGICKCORE_HEIC_DELEGATE)
  73 #if defined(MAGICKCORE_WINDOWS_SUPPORT)
  74 #include <heif.h>
  75 #else
  76 #include <libheif/heif.h>
  77 #endif
  78 #endif
  79
  80
  81 #if defined(MAGICKCORE_HEIC_DELEGATE)
  82
  83 #if !defined(MAGICKCORE_WINDOWS_SUPPORT)
  84 static MagickBooleanType
  85   WriteHEICImage(const ImageInfo *,Image *,ExceptionInfo *);
  86 #endif
  87
  88 /*
  89 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  90 %                                                                             %
  91 %                                                                             %
  92 %                                                                             %
  93 %   R e a d H E I C I m a g e                                                 %
  94 %                                                                             %
  95 %                                                                             %
  96 %                                                                             %
  97 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  98 %
  99 %  ReadHEICImage retrieves an image via a file descriptor, decodes the image,
 100 %  and returns it.  It allocates the memory necessary for the new Image
 101 %  structure and returns a pointer to the new image.
 102 %
 103 %  The format of the ReadHEICImage method is:
 104 %
 105 %      Image *ReadHEICImage(const ImageInfo *image_info,
 106 %        ExceptionInfo *exception)
 107 %
 108 %  A description of each parameter follows:
 109 %
 110 %    o image_info: the image info.
 111 %
 112 %    o exception: return any errors or warnings in this structure.
 113 %
 114 */
 115 static MagickBooleanType IsHeifSuccess(struct heif_error *error,Image *image,
 116   ExceptionInfo *exception)
 117 {
 118   if (error->code == 0)
 119     return(MagickTrue);
 120
 121   ThrowBinaryException(CorruptImageError,error->message,image->filename);
 122 }
 123
 124 static Image *ReadHEICImage(const ImageInfo *image_info,
 125   ExceptionInfo *exception)
 126 {
 127   heif_item_id
 128     exif_id;
 129
 130   Image
 131     *image;
 132
 133   int
 134     count,
 135     stride_y,
 136     stride_cb,
 137     stride_cr;
 138
 139   MagickBooleanType
 140     status;
 141
 142   MagickSizeType
 143     length;
 144
 145   ssize_t
 146     y;
 147
 148   struct heif_context
 149     *heif_context;
 150
 151   struct heif_error
 152     error;
 153
 154   struct heif_image
 155     *heif_image;
 156
 157   struct heif_image_handle
 158     *image_handle;
 159
 160   uint8_t
 161     *p_y,
 162     *p_cb,
 163     *p_cr;
 164
 165   void
 166     *file_data;
 167
 168   /*
 169     Open image file.
 170   */
 171   assert(image_info != (const ImageInfo *) NULL);
 172   assert(image_info->signature == MagickCoreSignature);
 173   if (image_info->debug != MagickFalse)
 174     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 175       image_info->filename);
 176   assert(exception != (ExceptionInfo *) NULL);
 177   assert(exception->signature == MagickCoreSignature);
 178   image=AcquireImage(image_info,exception);
 179   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 180   if (status == MagickFalse)
 181     return(DestroyImageList(image));
 182   length=GetBlobSize(image);
 183   file_data=AcquireMagickMemory(length);
 184   if (file_data == (void *) NULL)
 185     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 186   if (ReadBlob(image,length,file_data) != (ssize_t) length)
 187     {
 188       file_data=RelinquishMagickMemory(file_data);
 189       ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
 190     }
 191   /*
 192     Decode HEIF file
 193   */
 194   heif_context=heif_context_alloc();
 195   error=heif_context_read_from_memory(heif_context,file_data,length,NULL);
 196   file_data=RelinquishMagickMemory(file_data);
 197   if (IsHeifSuccess(&error,image,exception) == MagickFalse)
 198     {
 199       heif_context_free(heif_context);
 200       return(DestroyImageList(image));
 201     }
 202   image_handle=(struct heif_image_handle *) NULL;
 203   error=heif_context_get_primary_image_handle(heif_context,&image_handle);
 204   if (IsHeifSuccess(&error,image,exception) == MagickFalse)
 205     {
 206       heif_context_free(heif_context);
 207       return(DestroyImageList(image));
 208     }
 209   /*
 210     Read Exif data from HEIC file
 211   */
 212   count=heif_image_handle_get_list_of_metadata_block_IDs(image_handle,"Exif",
 213     &exif_id,1);
 214   if (count > 0)
 215     {
 216       size_t
 217         exif_size;
 218
 219       void
 220         *exif_buffer;
 221
 222       exif_size=heif_image_handle_get_metadata_size(image_handle,exif_id);
 223       if (exif_size > GetBlobSize(image))
 224         {
 225           heif_image_handle_release(image_handle);
 226           heif_context_free(heif_context);
 227           ThrowReaderException(CorruptImageError,
 228             "InsufficientImageDataInFile");
 229         }
 230       exif_buffer=AcquireMagickMemory(exif_size);
 231       error=heif_image_handle_get_metadata(image_handle,exif_id,exif_buffer);
 232       if (error.code == 0)
 233         {
 234           StringInfo
 235             *profile;
 236
 237           profile=BlobToStringInfo(exif_buffer,exif_size);
 238           SetImageProfile(image,"exif",profile,exception);
 239           profile=DestroyStringInfo(profile);
 240       }
 241       exif_buffer=RelinquishMagickMemory(exif_buffer);
 242   }
 243   /*
 244     Set image size
 245    */
 246   image->depth=8;
 247   image->columns=(size_t) heif_image_handle_get_width(image_handle);
 248   image->rows=(size_t) heif_image_handle_get_height(image_handle);
 249   if (image_info->ping != MagickFalse)
 250     {
 251       image->colorspace=YCbCrColorspace;
 252       heif_image_handle_release(image_handle);
 253       heif_context_free(heif_context);
 254       return(GetFirstImageInList(image));
 255     }
 256   status=SetImageExtent(image,image->columns,image->rows,exception);
 257   if (status == MagickFalse)
 258     {
 259       heif_image_handle_release(image_handle);
 260       heif_context_free(heif_context);
 261       return(DestroyImageList(image));
 262     }
 263   /*
 264     Copy HEIF image into ImageMagick data structures
 265   */
 266   (void) SetImageColorspace(image,YCbCrColorspace,exception);
 267   error=heif_decode_image(image_handle,&heif_image,heif_colorspace_YCbCr,
 268     heif_chroma_420,NULL);
 269   if (IsHeifSuccess(&error,image,exception) == MagickFalse)
 270     {
 271       heif_image_handle_release(image_handle);
 272       heif_context_free(heif_context);
 273       return(DestroyImageList(image));
 274     }
 275   p_y=heif_image_get_plane(heif_image,heif_channel_Y,&stride_y);
 276   p_cb=heif_image_get_plane(heif_image,heif_channel_Cb,&stride_cb);
 277   p_cr=heif_image_get_plane(heif_image,heif_channel_Cr,&stride_cr);
 278   for (y=0; y < (ssize_t) image->rows; y++)
 279   {
 280     Quantum
 281       *q;
 282
 283     register ssize_t
 284       x;
 285
 286     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 287     if (q == (Quantum *) NULL)
 288       break;
 289     for (x=0; x < (long) image->columns; x++)
 290     {
 291       SetPixelRed(image,ScaleCharToQuantum(p_y[y*stride_y + x]),q);
 292       SetPixelGreen(image,ScaleCharToQuantum(p_cb[(y/2)*stride_cb + x/2]),q);
 293       SetPixelBlue(image,ScaleCharToQuantum(p_cr[(y/2)*stride_cr + x/2]),q);
 294       q+=GetPixelChannels(image);
 295     }
 296     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 297       break;
 298   }
 299   heif_image_release(heif_image);
 300   heif_image_handle_release(image_handle);
 301   heif_context_free(heif_context);
 302   return(GetFirstImageInList(image));
 303 }
 304 #endif
 305
 306 /*
 307 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 308 %                                                                             %
 309 %                                                                             %
 310 %                                                                             %
 311 %   I s H E I C                                                               %
 312 %                                                                             %
 313 %                                                                             %
 314 %                                                                             %
 315 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 316 %
 317 %  IsHEIC() returns MagickTrue if the image format type, identified by the
 318 %  magick string, is Heic.
 319 %
 320 %  The format of the IsHEIC method is:
 321 %
 322 %      MagickBooleanType IsHEIC(const unsigned char *magick,const size_t length)
 323 %
 324 %  A description of each parameter follows:
 325 %
 326 %    o magick: compare image format pattern against these bytes.
 327 %
 328 %    o length: Specifies the length of the magick string.
 329 %
 330 */
 331 static MagickBooleanType IsHEIC(const unsigned char *magick,const size_t length)
 332 {
 333   if (length < 12)
 334     return(MagickFalse);
 335   if (LocaleNCompare((const char *) magick+8,"heic",4) == 0)
 336     return(MagickTrue);
 337   return(MagickFalse);
 338 }
 339
 340 /*
 341 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 342 %                                                                             %
 343 %                                                                             %
 344 %                                                                             %
 345 %   R e g i s t e r H E I C I m a g e                                         %
 346 %                                                                             %
 347 %                                                                             %
 348 %                                                                             %
 349 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 350 %
 351 %  RegisterHEICImage() adds attributes for the HEIC image format to the list of
 352 %  supported formats.  The attributes include the image format tag, a method
 353 %  to read and/or write the format, whether the format supports the saving of
 354 %  more than one frame to the same file or blob, whether the format supports
 355 %  native in-memory I/O, and a brief description of the format.
 356 %
 357 %  The format of the RegisterHEICImage method is:
 358 %
 359 %      size_t RegisterHEICImage(void)
 360 %
 361 */
 362 ModuleExport size_t RegisterHEICImage(void)
 363 {
 364   MagickInfo
 365     *entry;
 366
 367   entry=AcquireMagickInfo("HEIC","HEIC","High Efficiency Image Format");
 368 #if defined(MAGICKCORE_HEIC_DELEGATE)
 369   entry->decoder=(DecodeImageHandler *) ReadHEICImage;
 370 #if !defined(MAGICKCORE_WINDOWS_SUPPORT)
 371   entry->encoder=(EncodeImageHandler *) WriteHEICImage;
 372 #endif
 373 #endif
 374   entry->magick=(IsImageFormatHandler *) IsHEIC;
 375   entry->mime_type=ConstantString("image/x-heic");
 376   entry->flags|=CoderDecoderSeekableStreamFlag;
 377   entry->flags^=CoderAdjoinFlag;
 378   entry->flags^=CoderDecoderThreadSupportFlag;
 379   (void) RegisterMagickInfo(entry);
 380   return(MagickImageCoderSignature);
 381 }
 382
 383 /*
 384 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 385 %                                                                             %
 386 %                                                                             %
 387 %                                                                             %
 388 %   U n r e g i s t e r H E I C I m a g e                                     %
 389 %                                                                             %
 390 %                                                                             %
 391 %                                                                             %
 392 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 393 %
 394 %  UnregisterHEICImage() removes format registrations made by the HEIC module
 395 %  from the list of supported formats.
 396 %
 397 %  The format of the UnregisterHEICImage method is:
 398 %
 399 %      UnregisterHEICImage(void)
 400 %
 401 */
 402 ModuleExport void UnregisterHEICImage(void)
 403 {
 404   (void) UnregisterMagickInfo("HEIC");
 405 }
 406
 407
 408 /*
 409 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 410 %                                                                             %
 411 %                                                                             %
 412 %                                                                             %
 413 %   W r i t e H E I C I m a g e                                               %
 414 %                                                                             %
 415 %                                                                             %
 416 %                                                                             %
 417 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 418 %
 419 %  WriteHEICImage() writes an HEIF image using the libheif library.
 420 %
 421 %  The format of the WriteHEICImage method is:
 422 %
 423 %      MagickBooleanType WriteHEICImage(const ImageInfo *image_info,
 424 %        Image *image)
 425 %
 426 %  A description of each parameter follows.
 427 %
 428 %    o image_info: the image info.
 429 %
 430 %    o image:  The image.
 431 %
 432 %    o exception:  return any errors or warnings in this structure.
 433 %
 434 */
 435 #if defined(MAGICKCORE_HEIC_DELEGATE) && !defined(MAGICKCORE_WINDOWS_SUPPORT)
 436 static struct heif_error heif_write_func(struct heif_context *ctx,const void* data,
 437   size_t size,void* userdata)
 438 {
 439   Image
 440     *image;
 441
 442   struct heif_error
 443     error_ok;
 444
 445   (void) ctx;
 446   image=(Image*) userdata;
 447   (void) WriteBlob(image,size,data);
 448   error_ok.code=heif_error_Ok;
 449   error_ok.subcode=heif_suberror_Unspecified;
 450   error_ok.message="ok";
 451   return(error_ok);
 452 }
 453
 454 static MagickBooleanType WriteHEICImage(const ImageInfo *image_info,Image *image,
 455   ExceptionInfo *exception)
 456 {
 457   long
 458     x,
 459     y;
 460
 461   MagickBooleanType
 462     status;
 463
 464   MagickOffsetType
 465     scene;
 466
 467   struct heif_context
 468     *heif_context;
 469
 470   struct heif_encoder
 471     *heif_encoder;
 472
 473   struct heif_image
 474     *heif_image;
 475
 476   /*
 477     Open output image file.
 478   */
 479   assert(image_info != (const ImageInfo *) NULL);
 480   assert(image_info->signature == MagickCoreSignature);
 481   assert(image != (Image *) NULL);
 482   assert(image->signature == MagickCoreSignature);
 483   if (image->debug != MagickFalse)
 484     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 485   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 486   if (status == MagickFalse)
 487     return(status);
 488   scene=0;
 489   heif_context=heif_context_alloc();
 490   heif_image=(struct heif_image*) NULL;
 491   heif_encoder=(struct heif_encoder*) NULL;
 492   do
 493   {
 494     const Quantum
 495       *p;
 496
 497     int
 498       stride_y,
 499       stride_cb,
 500       stride_cr;
 501
 502     struct heif_error
 503       error;
 504
 505     struct heif_writer
 506       writer;
 507
 508     uint8_t
 509       *p_y,
 510       *p_cb,
 511       *p_cr;
 512
 513     /*
 514       Transform colorspace to YCbCr.
 515     */
 516     if (image->colorspace != YCbCrColorspace)
 517       status=TransformImageColorspace(image,YCbCrColorspace,exception);
 518     if (status == MagickFalse)
 519       break;
 520     /*
 521       Initialize HEIF encoder context
 522     */
 523     error=heif_image_create((int) image->columns,(int) image->rows,
 524       heif_colorspace_YCbCr,heif_chroma_420,&heif_image);
 525     status=IsHeifSuccess(&error,image,exception);
 526     if (status == MagickFalse)
 527       break;
 528     error=heif_image_add_plane(heif_image,heif_channel_Y,(int) image->columns,
 529       (int) image->rows,8);
 530     status=IsHeifSuccess(&error,image,exception);
 531     if (status == MagickFalse)
 532       break;
 533     error=heif_image_add_plane(heif_image,heif_channel_Cb,
 534       ((int) image->columns+1)/2,((int) image->rows+1)/2,8);
 535     status=IsHeifSuccess(&error,image,exception);
 536     if (status == MagickFalse)
 537       break;
 538     error=heif_image_add_plane(heif_image,heif_channel_Cr,
 539       ((int) image->columns+1)/2,((int) image->rows+1)/2,8);
 540     status=IsHeifSuccess(&error,image,exception);
 541     if (status == MagickFalse)
 542       break;
 543     p_y=heif_image_get_plane(heif_image,heif_channel_Y,&stride_y);
 544     p_cb=heif_image_get_plane(heif_image,heif_channel_Cb,&stride_cb);
 545     p_cr=heif_image_get_plane(heif_image,heif_channel_Cr,&stride_cr);
 546     /*
 547       Copy image to heif_image
 548     */
 549     for (y=0; y < (long) image->rows; y++)
 550     {
 551       p=GetVirtualPixels(image,0,y,image->columns,1,exception);
 552       if (p == (const Quantum *) NULL)
 553         {
 554           status=MagickFalse;
 555           break;
 556         }
 557       if ((y & 1)==0)
 558         {
 559           for (x=0; x < (long) image->columns; x+=2)
 560             {
 561               p_y[y*stride_y+x]=ScaleQuantumToChar(GetPixelRed(image,p));
 562               p_cb[y/2*stride_cb+x/2]=ScaleQuantumToChar(GetPixelGreen(image,
 563                 p));
 564               p_cr[y/2*stride_cr+x/2]=ScaleQuantumToChar(GetPixelBlue(image,
 565                 p));
 566               p+=GetPixelChannels(image);
 567
 568               if (x+1 < image->columns)
 569                 {
 570                   p_y[y*stride_y + x+1]=ScaleQuantumToChar(GetPixelRed(image,
 571                     p));
 572                   p+=GetPixelChannels(image);
 573                 }
 574             }
 575         }
 576       else
 577         {
 578           for (x=0; x < (long) image->columns; x++)
 579           {
 580             p_y[y*stride_y + x]=ScaleQuantumToChar(GetPixelRed(image,p));
 581             p+=GetPixelChannels(image);
 582           }
 583         }
 584       if (image->previous == (Image *) NULL)
 585         {
 586           status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 587             image->rows);
 588           if (status == MagickFalse)
 589             break;
 590         }
 591     }
 592     if (status == MagickFalse)
 593       break;
 594     /*
 595       Code and actually write the HEIC image
 596     */
 597     error=heif_context_get_encoder_for_format(heif_context,
 598       heif_compression_HEVC,&heif_encoder);
 599     status=IsHeifSuccess(&error,image,exception);
 600     if (status == MagickFalse)
 601       break;
 602     if (image_info->quality != UndefinedCompressionQuality)
 603       {
 604         error=heif_encoder_set_lossy_quality(heif_encoder,
 605           (int) image_info->quality);
 606         status=IsHeifSuccess(&error,image,exception);
 607         if (status == MagickFalse)
 608           break;
 609       }
 610     error=heif_context_encode_image(heif_context,heif_image,heif_encoder,
 611       (const struct heif_encoding_options*) NULL,
 612       (struct heif_image_handle**) NULL);
 613     status=IsHeifSuccess(&error,image,exception);
 614     if (status == MagickFalse)
 615       break;
 616     writer.writer_api_version=1;
 617     writer.write=heif_write_func;
 618     error=heif_context_write(heif_context,&writer,image);
 619     status=IsHeifSuccess(&error,image,exception);
 620     if (status == MagickFalse)
 621       break;
 622     if (GetNextImageInList(image) == (Image *) NULL)
 623       break;
 624     image=SyncNextImageInList(image);
 625     status=SetImageProgress(image,SaveImagesTag,scene,
 626       GetImageListLength(image));
 627     if (status == MagickFalse)
 628       break;
 629     heif_encoder_release(heif_encoder);
 630     heif_encoder=(struct heif_encoder*) NULL;
 631     heif_image_release(heif_image);
 632     heif_image=(struct heif_image*) NULL;
 633     scene++;
 634   } while (image_info->adjoin != MagickFalse);
 635
 636   if (heif_encoder != (struct heif_encoder*) NULL)
 637     heif_encoder_release(heif_encoder);
 638   if (heif_image != (struct heif_image*) NULL)
 639     heif_image_release(heif_image);
 640   heif_context_free(heif_context);
 641
 642   (void) CloseBlob(image);
 643   return(status);
 644 }
 645 #endif