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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                        U   U  Y   Y  V   V  Y   Y                           %
   7 %                        U   U   Y Y   V   V   Y Y                            %
   8 %                        U   U    Y    V   V    Y                             %
   9 %                        U   U    Y     V V     Y                             %
  10 %                         UUU     Y      V      Y                             %
  11 %                                                                             %
  12 %                                                                             %
  13 %            Read/Write 16bit/pixel Interleaved YUV Image Format              %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                   Cristy                                    %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2017 ImageMagick Studio LLC, a non-profit organization      %
  21 %  dedicated to making software imaging solutions freely available.           %
  22 %                                                                             %
  23 %  You may not use this file except in compliance with the License.  You may  %
  24 %  obtain a copy of the License at                                            %
  25 %                                                                             %
  26 %    http://www.imagemagick.org/script/license.php                            %
  27 %                                                                             %
  28 %  Unless required by applicable law or agreed to in writing, software        %
  29 %  distributed under the License is distributed on an "AS IS" BASIS,          %
  30 %  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
  31 %  See the License for the specific language governing permissions and        %
  32 %  limitations under the License.                                             %
  33 %                                                                             %
  34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  35 %
  36 %
  37 */
  38 \f
  39 /*
  40   Include declarations.
  41 */
  42 #include "MagickCore/studio.h"
  43 #include "MagickCore/blob.h"
  44 #include "MagickCore/blob-private.h"
  45 #include "MagickCore/cache.h"
  46 #include "MagickCore/color.h"
  47 #include "MagickCore/colorspace.h"
  48 #include "MagickCore/exception.h"
  49 #include "MagickCore/exception-private.h"
  50 #include "MagickCore/image.h"
  51 #include "MagickCore/image-private.h"
  52 #include "MagickCore/list.h"
  53 #include "MagickCore/magick.h"
  54 #include "MagickCore/memory_.h"
  55 #include "MagickCore/monitor.h"
  56 #include "MagickCore/monitor-private.h"
  57 #include "MagickCore/pixel-accessor.h"
  58 #include "MagickCore/quantum-private.h"
  59 #include "MagickCore/static.h"
  60 #include "MagickCore/string_.h"
  61 #include "MagickCore/module.h"
  62 \f
  63 /*
  64   Forward declarations.
  65 */
  66 static MagickBooleanType
  67   WriteUYVYImage(const ImageInfo *,Image *,ExceptionInfo *);
  68 \f
  69 /*
  70 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  71 %                                                                             %
  72 %                                                                             %
  73 %                                                                             %
  74 %   R e a d U Y V Y I m a g e                                                 %
  75 %                                                                             %
  76 %                                                                             %
  77 %                                                                             %
  78 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  79 %
  80 %  ReadUYVYImage() reads an image in the UYVY format and returns it.  It
  81 %  allocates the memory necessary for the new Image structure and returns a
  82 %  pointer to the new image.
  83 %
  84 %  The format of the ReadUYVYImage method is:
  85 %
  86 %      Image *ReadUYVYImage(const ImageInfo *image_info,
  87 %        ExceptionInfo *exception)
  88 %
  89 %  A description of each parameter follows:
  90 %
  91 %    o image_info: the image info.
  92 %
  93 %    o exception: return any errors or warnings in this structure.
  94 %
  95 */
  96 static Image *ReadUYVYImage(const ImageInfo *image_info,
  97   ExceptionInfo *exception)
  98 {
  99   Image
 100     *image;
 101
 102   MagickBooleanType
 103     status;
 104
 105   register ssize_t
 106     x;
 107
 108   register Quantum
 109     *q;
 110
 111   ssize_t
 112     y;
 113
 114   unsigned char
 115     u,
 116     v,
 117     y1,
 118     y2;
 119
 120   /*
 121     Open image file.
 122   */
 123   assert(image_info != (const ImageInfo *) NULL);
 124   assert(image_info->signature == MagickCoreSignature);
 125   if (image_info->debug != MagickFalse)
 126     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 127       image_info->filename);
 128   assert(exception != (ExceptionInfo *) NULL);
 129   assert(exception->signature == MagickCoreSignature);
 130   image=AcquireImage(image_info,exception);
 131   if ((image->columns == 0) || (image->rows == 0))
 132     ThrowReaderException(OptionError,"MustSpecifyImageSize");
 133   if ((image->columns % 2) != 0)
 134     image->columns++;
 135   (void) CopyMagickString(image->filename,image_info->filename,MagickPathExtent);
 136   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 137   if (status == MagickFalse)
 138     return((Image *) NULL);
 139   if (DiscardBlobBytes(image,image->offset) == MagickFalse)
 140     ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 141       image->filename);
 142   image->depth=8;
 143   if (image_info->ping != MagickFalse)
 144     {
 145       (void) CloseBlob(image);
 146       return(GetFirstImageInList(image));
 147     }
 148   status=SetImageExtent(image,image->columns,image->rows,exception);
 149   if (status == MagickFalse)
 150     return(DestroyImageList(image));
 151   /*
 152     Accumulate UYVY, then unpack into two pixels.
 153   */
 154   for (y=0; y < (ssize_t) image->rows; y++)
 155   {
 156     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 157     if (q == (Quantum *) NULL)
 158       break;
 159     for (x=0; x < (ssize_t) (image->columns >> 1); x++)
 160     {
 161       u=(unsigned char) ReadBlobByte(image);
 162       y1=(unsigned char) ReadBlobByte(image);
 163       v=(unsigned char) ReadBlobByte(image);
 164       y2=(unsigned char) ReadBlobByte(image);
 165       SetPixelRed(image,ScaleCharToQuantum(y1),q);
 166       SetPixelGreen(image,ScaleCharToQuantum(u),q);
 167       SetPixelBlue(image,ScaleCharToQuantum(v),q);
 168       q+=GetPixelChannels(image);
 169       SetPixelRed(image,ScaleCharToQuantum(y2),q);
 170       SetPixelGreen(image,ScaleCharToQuantum(u),q);
 171       SetPixelBlue(image,ScaleCharToQuantum(v),q);
 172       q+=GetPixelChannels(image);
 173     }
 174     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 175       break;
 176     status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 177       image->rows);
 178     if (status == MagickFalse)
 179       break;
 180   }
 181   SetImageColorspace(image,YCbCrColorspace,exception);
 182   if (EOFBlob(image) != MagickFalse)
 183     ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 184       image->filename);
 185   (void) CloseBlob(image);
 186   return(GetFirstImageInList(image));
 187 }
 188 \f
 189 /*
 190 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 191 %                                                                             %
 192 %                                                                             %
 193 %                                                                             %
 194 %   R e g i s t e r U Y V Y I m a g e                                         %
 195 %                                                                             %
 196 %                                                                             %
 197 %                                                                             %
 198 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 199 %
 200 %  RegisterUYVYImage() adds attributes for the UYVY image format to
 201 %  the list of supported formats.  The attributes include the image format
 202 %  tag, a method to read and/or write the format, whether the format
 203 %  supports the saving of more than one frame to the same file or blob,
 204 %  whether the format supports native in-memory I/O, and a brief
 205 %  description of the format.
 206 %
 207 %  The format of the RegisterUYVYImage method is:
 208 %
 209 %      size_t RegisterUYVYImage(void)
 210 %
 211 */
 212 ModuleExport size_t RegisterUYVYImage(void)
 213 {
 214   MagickInfo
 215     *entry;
 216
 217   entry=AcquireMagickInfo("UYVY","PAL","16bit/pixel interleaved YUV");
 218   entry->decoder=(DecodeImageHandler *) ReadUYVYImage;
 219   entry->encoder=(EncodeImageHandler *) WriteUYVYImage;
 220   entry->flags^=CoderAdjoinFlag;
 221   entry->flags|=CoderRawSupportFlag;
 222   entry->flags|=CoderEndianSupportFlag;
 223   (void) RegisterMagickInfo(entry);
 224   entry=AcquireMagickInfo("UYVY","UYVY","16bit/pixel interleaved YUV");
 225   entry->decoder=(DecodeImageHandler *) ReadUYVYImage;
 226   entry->encoder=(EncodeImageHandler *) WriteUYVYImage;
 227   entry->flags^=CoderAdjoinFlag;
 228   entry->flags|=CoderRawSupportFlag;
 229   entry->flags|=CoderEndianSupportFlag;
 230   (void) RegisterMagickInfo(entry);
 231   return(MagickImageCoderSignature);
 232 }
 233 \f
 234 /*
 235 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 236 %                                                                             %
 237 %                                                                             %
 238 %                                                                             %
 239 %   U n r e g i s t e r U Y V Y I m a g e                                     %
 240 %                                                                             %
 241 %                                                                             %
 242 %                                                                             %
 243 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 244 %
 245 %  UnregisterUYVYImage() removes format registrations made by the
 246 %  UYVY module from the list of supported formats.
 247 %
 248 %  The format of the UnregisterUYVYImage method is:
 249 %
 250 %      UnregisterUYVYImage(void)
 251 %
 252 */
 253 ModuleExport void UnregisterUYVYImage(void)
 254 {
 255   (void) UnregisterMagickInfo("PAL");
 256   (void) UnregisterMagickInfo("UYVY");
 257 }
 258 \f
 259 /*
 260 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 261 %                                                                             %
 262 %                                                                             %
 263 %                                                                             %
 264 %   W r i t e U Y V Y I m a g e                                               %
 265 %                                                                             %
 266 %                                                                             %
 267 %                                                                             %
 268 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 269 %
 270 %  WriteUYVYImage() writes an image to a file in the digital UYVY
 271 %  format.  This format, used by AccomWSD, is not dramatically higher quality
 272 %  than the 12bit/pixel YUV format, but has better locality.
 273 %
 274 %  The format of the WriteUYVYImage method is:
 275 %
 276 %      MagickBooleanType WriteUYVYImage(const ImageInfo *image_info,
 277 %        Image *image,ExceptionInfo *exception)
 278 %
 279 %  A description of each parameter follows.
 280 %
 281 %    o image_info: the image info.
 282 %
 283 %    o image:  The image.  Implicit assumption: number of columns is even.
 284 %
 285 %    o exception: return any errors or warnings in this structure.
 286 %
 287 */
 288 static MagickBooleanType WriteUYVYImage(const ImageInfo *image_info,
 289   Image *image,ExceptionInfo *exception)
 290 {
 291   PixelInfo
 292     pixel;
 293
 294   Image
 295     *uyvy_image;
 296
 297   MagickBooleanType
 298     full,
 299     status;
 300
 301   register const Quantum
 302     *p;
 303
 304   register ssize_t
 305     x;
 306
 307   ssize_t
 308     y;
 309
 310   /*
 311     Open output image file.
 312   */
 313   assert(image_info != (const ImageInfo *) NULL);
 314   assert(image_info->signature == MagickCoreSignature);
 315   assert(image != (Image *) NULL);
 316   assert(image->signature == MagickCoreSignature);
 317   if (image->debug != MagickFalse)
 318     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 319   if ((image->columns % 2) != 0)
 320     image->columns++;
 321   assert(exception != (ExceptionInfo *) NULL);
 322   assert(exception->signature == MagickCoreSignature);
 323   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 324   if (status == MagickFalse)
 325     return(status);
 326   /*
 327     Accumulate two pixels, then output.
 328   */
 329   uyvy_image=CloneImage(image,0,0,MagickTrue,exception);
 330   if (uyvy_image == (Image *) NULL)
 331     return(MagickFalse);
 332   (void) TransformImageColorspace(uyvy_image,YCbCrColorspace,exception);
 333   full=MagickFalse;
 334   (void) ResetMagickMemory(&pixel,0,sizeof(PixelInfo));
 335   for (y=0; y < (ssize_t) image->rows; y++)
 336   {
 337     p=GetVirtualPixels(uyvy_image,0,y,image->columns,1,exception);
 338     if (p == (const Quantum *) NULL)
 339       break;
 340     for (x=0; x < (ssize_t) image->columns; x++)
 341     {
 342       if (full != MagickFalse)
 343         {
 344           pixel.green=(pixel.green+GetPixelGreen(uyvy_image,p))/2;
 345           pixel.blue=(pixel.blue+GetPixelBlue(uyvy_image,p))/2;
 346           (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.green));
 347           (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.red));
 348           (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.blue));
 349           (void) WriteBlobByte(image,ScaleQuantumToChar(
 350             GetPixelRed(uyvy_image,p)));
 351         }
 352       pixel.red=(double) GetPixelRed(uyvy_image,p);
 353       pixel.green=(double) GetPixelGreen(uyvy_image,p);
 354       pixel.blue=(double) GetPixelBlue(uyvy_image,p);
 355       full=full == MagickFalse ? MagickTrue : MagickFalse;
 356       p+=GetPixelChannels(uyvy_image);
 357     }
 358     status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 359       image->rows);
 360     if (status == MagickFalse)
 361       break;
 362   }
 363   uyvy_image=DestroyImage(uyvy_image);
 364   (void) CloseBlob(image);
 365   return(MagickTrue);
 366 }