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 1999-2014 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 == MagickSignature);
 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 == MagickSignature);
 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,MaxTextExtent);
 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   /*
 149     Accumulate UYVY, then unpack into two pixels.
 150   */
 151   for (y=0; y < (ssize_t) image->rows; y++)
 152   {
 153     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 154     if (q == (Quantum *) NULL)
 155       break;
 156     for (x=0; x < (ssize_t) (image->columns >> 1); x++)
 157     {
 158       u=(unsigned char) ReadBlobByte(image);
 159       y1=(unsigned char) ReadBlobByte(image);
 160       v=(unsigned char) ReadBlobByte(image);
 161       y2=(unsigned char) ReadBlobByte(image);
 162       SetPixelRed(image,ScaleCharToQuantum(y1),q);
 163       SetPixelGreen(image,ScaleCharToQuantum(u),q);
 164       SetPixelBlue(image,ScaleCharToQuantum(v),q);
 165       q+=GetPixelChannels(image);
 166       SetPixelRed(image,ScaleCharToQuantum(y2),q);
 167       SetPixelGreen(image,ScaleCharToQuantum(u),q);
 168       SetPixelBlue(image,ScaleCharToQuantum(v),q);
 169       q+=GetPixelChannels(image);
 170     }
 171     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 172       break;
 173     status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 174       image->rows);
 175     if (status == MagickFalse)
 176       break;
 177   }
 178   SetImageColorspace(image,YCbCrColorspace,exception);
 179   if (EOFBlob(image) != MagickFalse)
 180     ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 181       image->filename);
 182   (void) CloseBlob(image);
 183   return(GetFirstImageInList(image));
 184 }
 185 \f
 186 /*
 187 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 188 %                                                                             %
 189 %                                                                             %
 190 %                                                                             %
 191 %   R e g i s t e r U Y V Y I m a g e                                         %
 192 %                                                                             %
 193 %                                                                             %
 194 %                                                                             %
 195 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 196 %
 197 %  RegisterUYVYImage() adds attributes for the UYVY image format to
 198 %  the list of supported formats.  The attributes include the image format
 199 %  tag, a method to read and/or write the format, whether the format
 200 %  supports the saving of more than one frame to the same file or blob,
 201 %  whether the format supports native in-memory I/O, and a brief
 202 %  description of the format.
 203 %
 204 %  The format of the RegisterUYVYImage method is:
 205 %
 206 %      size_t RegisterUYVYImage(void)
 207 %
 208 */
 209 ModuleExport size_t RegisterUYVYImage(void)
 210 {
 211   MagickInfo
 212     *entry;
 213
 214   entry=SetMagickInfo("PAL");
 215   entry->decoder=(DecodeImageHandler *) ReadUYVYImage;
 216   entry->encoder=(EncodeImageHandler *) WriteUYVYImage;
 217   entry->adjoin=MagickFalse;
 218   entry->raw=MagickTrue;
 219   entry->endian_support=MagickTrue;
 220   entry->description=ConstantString("16bit/pixel interleaved YUV");
 221   entry->module=ConstantString("UYVY");
 222   (void) RegisterMagickInfo(entry);
 223   entry=SetMagickInfo("UYVY");
 224   entry->decoder=(DecodeImageHandler *) ReadUYVYImage;
 225   entry->encoder=(EncodeImageHandler *) WriteUYVYImage;
 226   entry->adjoin=MagickFalse;
 227   entry->raw=MagickTrue;
 228   entry->endian_support=MagickTrue;
 229   entry->description=ConstantString("16bit/pixel interleaved YUV");
 230   entry->module=ConstantString("UYVY");
 231   (void) RegisterMagickInfo(entry);
 232   return(MagickImageCoderSignature);
 233 }
 234 \f
 235 /*
 236 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 237 %                                                                             %
 238 %                                                                             %
 239 %                                                                             %
 240 %   U n r e g i s t e r U Y V Y I m a g e                                     %
 241 %                                                                             %
 242 %                                                                             %
 243 %                                                                             %
 244 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 245 %
 246 %  UnregisterUYVYImage() removes format registrations made by the
 247 %  UYVY module from the list of supported formats.
 248 %
 249 %  The format of the UnregisterUYVYImage method is:
 250 %
 251 %      UnregisterUYVYImage(void)
 252 %
 253 */
 254 ModuleExport void UnregisterUYVYImage(void)
 255 {
 256   (void) UnregisterMagickInfo("PAL");
 257   (void) UnregisterMagickInfo("UYVY");
 258 }
 259 \f
 260 /*
 261 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 262 %                                                                             %
 263 %                                                                             %
 264 %                                                                             %
 265 %   W r i t e U Y V Y I m a g e                                               %
 266 %                                                                             %
 267 %                                                                             %
 268 %                                                                             %
 269 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 270 %
 271 %  WriteUYVYImage() writes an image to a file in the digital UYVY
 272 %  format.  This format, used by AccomWSD, is not dramatically higher quality
 273 %  than the 12bit/pixel YUV format, but has better locality.
 274 %
 275 %  The format of the WriteUYVYImage method is:
 276 %
 277 %      MagickBooleanType WriteUYVYImage(const ImageInfo *image_info,
 278 %        Image *image,ExceptionInfo *exception)
 279 %
 280 %  A description of each parameter follows.
 281 %
 282 %    o image_info: the image info.
 283 %
 284 %    o image:  The image.  Implicit assumption: number of columns is even.
 285 %
 286 %    o exception: return any errors or warnings in this structure.
 287 %
 288 */
 289 static MagickBooleanType WriteUYVYImage(const ImageInfo *image_info,
 290   Image *image,ExceptionInfo *exception)
 291 {
 292   PixelInfo
 293     pixel;
 294
 295   Image
 296     *uyvy_image;
 297
 298   MagickBooleanType
 299     full,
 300     status;
 301
 302   register const Quantum
 303     *p;
 304
 305   register ssize_t
 306     x;
 307
 308   ssize_t
 309     y;
 310
 311   /*
 312     Open output image file.
 313   */
 314   assert(image_info != (const ImageInfo *) NULL);
 315   assert(image_info->signature == MagickSignature);
 316   assert(image != (Image *) NULL);
 317   assert(image->signature == MagickSignature);
 318   if (image->debug != MagickFalse)
 319     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 320   if ((image->columns % 2) != 0)
 321     image->columns++;
 322   assert(exception != (ExceptionInfo *) NULL);
 323   assert(exception->signature == MagickSignature);
 324   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 325   if (status == MagickFalse)
 326     return(status);
 327   /*
 328     Accumulate two pixels, then output.
 329   */
 330   uyvy_image=CloneImage(image,0,0,MagickTrue,exception);
 331   if (uyvy_image == (Image *) NULL)
 332     return(MagickFalse);
 333   (void) TransformImageColorspace(uyvy_image,YCbCrColorspace,exception);
 334   full=MagickFalse;
 335   (void) ResetMagickMemory(&pixel,0,sizeof(PixelInfo));
 336   for (y=0; y < (ssize_t) image->rows; y++)
 337   {
 338     p=GetVirtualPixels(uyvy_image,0,y,image->columns,1,exception);
 339     if (p == (const Quantum *) NULL)
 340       break;
 341     for (x=0; x < (ssize_t) image->columns; x++)
 342     {
 343       if (full != MagickFalse)
 344         {
 345           pixel.green=(pixel.green+GetPixelGreen(uyvy_image,p))/2;
 346           pixel.blue=(pixel.blue+GetPixelBlue(uyvy_image,p))/2;
 347           (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.green));
 348           (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.red));
 349           (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.blue));
 350           (void) WriteBlobByte(image,ScaleQuantumToChar(
 351             GetPixelRed(uyvy_image,p)));
 352         }
 353       pixel.red=(double) GetPixelRed(uyvy_image,p);
 354       pixel.green=(double) GetPixelGreen(uyvy_image,p);
 355       pixel.blue=(double) GetPixelBlue(uyvy_image,p);
 356       full=full == MagickFalse ? MagickTrue : MagickFalse;
 357       p+=GetPixelChannels(uyvy_image);
 358     }
 359     status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 360       image->rows);
 361     if (status == MagickFalse)
 362       break;
 363   }
 364   uyvy_image=DestroyImage(uyvy_image);
 365   (void) CloseBlob(image);
 366   return(MagickTrue);
 367 }