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 %                                John Cristy                                  %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2011 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 "magick/studio.h"
  43 #include "magick/blob.h"
  44 #include "magick/blob-private.h"
  45 #include "magick/cache.h"
  46 #include "magick/color.h"
  47 #include "magick/colorspace.h"
  48 #include "magick/exception.h"
  49 #include "magick/exception-private.h"
  50 #include "magick/image.h"
  51 #include "magick/image-private.h"
  52 #include "magick/list.h"
  53 #include "magick/magick.h"
  54 #include "magick/memory_.h"
  55 #include "magick/monitor.h"
  56 #include "magick/monitor-private.h"
  57 #include "magick/quantum-private.h"
  58 #include "magick/static.h"
  59 #include "magick/string_.h"
  60 #include "magick/module.h"
  61 \f
  62 /*
  63   Forward declarations.
  64 */
  65 static MagickBooleanType
  66   WriteUYVYImage(const ImageInfo *,Image *);
  67 \f
  68 /*
  69 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  70 %                                                                             %
  71 %                                                                             %
  72 %                                                                             %
  73 %   R e a d U Y V Y I m a g e                                                 %
  74 %                                                                             %
  75 %                                                                             %
  76 %                                                                             %
  77 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  78 %
  79 %  ReadUYVYImage() reads an image in the UYVY format and returns it.  It
  80 %  allocates the memory necessary for the new Image structure and returns a
  81 %  pointer to the new image.
  82 %
  83 %  The format of the ReadUYVYImage method is:
  84 %
  85 %      Image *ReadUYVYImage(const ImageInfo *image_info,
  86 %        ExceptionInfo *exception)
  87 %
  88 %  A description of each parameter follows:
  89 %
  90 %    o image_info: the image info.
  91 %
  92 %    o exception: return any errors or warnings in this structure.
  93 %
  94 */
  95 static Image *ReadUYVYImage(const ImageInfo *image_info,
  96   ExceptionInfo *exception)
  97 {
  98   Image
  99     *image;
 100
 101   MagickBooleanType
 102     status;
 103
 104   register ssize_t
 105     x;
 106
 107   register PixelPacket
 108     *q;
 109
 110   ssize_t
 111     y;
 112
 113   unsigned char
 114     u,
 115     v,
 116     y1,
 117     y2;
 118
 119   /*
 120     Open image file.
 121   */
 122   assert(image_info != (const ImageInfo *) NULL);
 123   assert(image_info->signature == MagickSignature);
 124   if (image_info->debug != MagickFalse)
 125     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 126       image_info->filename);
 127   assert(exception != (ExceptionInfo *) NULL);
 128   assert(exception->signature == MagickSignature);
 129   image=AcquireImage(image_info);
 130   if ((image->columns == 0) || (image->rows == 0))
 131     ThrowReaderException(OptionError,"MustSpecifyImageSize");
 132   if ((image->columns % 2) != 0)
 133     image->columns++;
 134   (void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent);
 135   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 136   if (status == MagickFalse)
 137     return((Image *) NULL);
 138   if (DiscardBlobBytes(image,image->offset) == MagickFalse)
 139     ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 140       image->filename);
 141   image->depth=8;
 142   if (image_info->ping != MagickFalse)
 143     {
 144       (void) CloseBlob(image);
 145       return(GetFirstImageInList(image));
 146     }
 147   /*
 148     Accumulate UYVY, then unpack into two pixels.
 149   */
 150   for (y=0; y < (ssize_t) image->rows; y++)
 151   {
 152     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 153     if (q == (PixelPacket *) NULL)
 154       break;
 155     for (x=0; x < (ssize_t) (image->columns >> 1); x++)
 156     {
 157       u=(unsigned char) ReadBlobByte(image);
 158       y1=(unsigned char) ReadBlobByte(image);
 159       v=(unsigned char) ReadBlobByte(image);
 160       y2=(unsigned char) ReadBlobByte(image);
 161       SetRedPixelComponent(q,ScaleCharToQuantum(y1));
 162       SetGreenPixelComponent(q,ScaleCharToQuantum(u));
 163       SetBluePixelComponent(q,ScaleCharToQuantum(v));
 164       q++;
 165       SetRedPixelComponent(q,ScaleCharToQuantum(y2));
 166       SetGreenPixelComponent(q,ScaleCharToQuantum(u));
 167       SetBluePixelComponent(q,ScaleCharToQuantum(v));
 168       q++;
 169     }
 170     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 171       break;
 172     status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 173       image->rows);
 174     if (status == MagickFalse)
 175       break;
 176   }
 177   image->colorspace=YCbCrColorspace;
 178   if (EOFBlob(image) != MagickFalse)
 179     ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 180       image->filename);
 181   (void) CloseBlob(image);
 182   return(GetFirstImageInList(image));
 183 }
 184 \f
 185 /*
 186 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 187 %                                                                             %
 188 %                                                                             %
 189 %                                                                             %
 190 %   R e g i s t e r U Y V Y I m a g e                                         %
 191 %                                                                             %
 192 %                                                                             %
 193 %                                                                             %
 194 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 195 %
 196 %  RegisterUYVYImage() adds attributes for the UYVY image format to
 197 %  the list of supported formats.  The attributes include the image format
 198 %  tag, a method to read and/or write the format, whether the format
 199 %  supports the saving of more than one frame to the same file or blob,
 200 %  whether the format supports native in-memory I/O, and a brief
 201 %  description of the format.
 202 %
 203 %  The format of the RegisterUYVYImage method is:
 204 %
 205 %      size_t RegisterUYVYImage(void)
 206 %
 207 */
 208 ModuleExport size_t RegisterUYVYImage(void)
 209 {
 210   MagickInfo
 211     *entry;
 212
 213   entry=SetMagickInfo("PAL");
 214   entry->decoder=(DecodeImageHandler *) ReadUYVYImage;
 215   entry->encoder=(EncodeImageHandler *) WriteUYVYImage;
 216   entry->adjoin=MagickFalse;
 217   entry->raw=MagickTrue;
 218   entry->endian_support=MagickTrue;
 219   entry->description=ConstantString("16bit/pixel interleaved YUV");
 220   entry->module=ConstantString("UYVY");
 221   (void) RegisterMagickInfo(entry);
 222   entry=SetMagickInfo("UYVY");
 223   entry->decoder=(DecodeImageHandler *) ReadUYVYImage;
 224   entry->encoder=(EncodeImageHandler *) WriteUYVYImage;
 225   entry->adjoin=MagickFalse;
 226   entry->raw=MagickTrue;
 227   entry->endian_support=MagickTrue;
 228   entry->description=ConstantString("16bit/pixel interleaved YUV");
 229   entry->module=ConstantString("UYVY");
 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)
 278 %
 279 %  A description of each parameter follows.
 280 %
 281 %    o image_info: the image info.
 282 %
 283 %    o image:  The image.
 284 %      Implicit assumption: number of columns is even.
 285 %
 286 */
 287 static MagickBooleanType WriteUYVYImage(const ImageInfo *image_info,
 288   Image *image)
 289 {
 290   MagickPixelPacket
 291     pixel;
 292
 293   Image
 294     *uyvy_image;
 295
 296   MagickBooleanType
 297     full,
 298     status;
 299
 300   register const PixelPacket
 301     *p;
 302
 303   register ssize_t
 304     x;
 305
 306   ssize_t
 307     y;
 308
 309   /*
 310     Open output image file.
 311   */
 312   assert(image_info != (const ImageInfo *) NULL);
 313   assert(image_info->signature == MagickSignature);
 314   assert(image != (Image *) NULL);
 315   assert(image->signature == MagickSignature);
 316   if (image->debug != MagickFalse)
 317     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 318   if ((image->columns % 2) != 0)
 319     image->columns++;
 320   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
 321   if (status == MagickFalse)
 322     return(status);
 323   /*
 324     Accumulate two pixels, then output.
 325   */
 326   uyvy_image=CloneImage(image,0,0,MagickTrue,&image->exception);
 327   if (uyvy_image == (Image *) NULL)
 328     ThrowWriterException(ResourceLimitError,image->exception.reason);
 329   (void) TransformImageColorspace(uyvy_image,YCbCrColorspace);
 330   full=MagickFalse;
 331   (void) ResetMagickMemory(&pixel,0,sizeof(MagickPixelPacket));
 332   for (y=0; y < (ssize_t) image->rows; y++)
 333   {
 334     p=GetVirtualPixels(uyvy_image,0,y,image->columns,1,&image->exception);
 335     if (p == (const PixelPacket *) NULL)
 336       break;
 337     for (x=0; x < (ssize_t) image->columns; x++)
 338     {
 339       if (full != MagickFalse)
 340         {
 341           pixel.green=(pixel.green+GetGreenPixelComponent(p))/2;
 342           pixel.blue=(pixel.blue+GetBluePixelComponent(p))/2;
 343           (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.green));
 344           (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.red));
 345           (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.blue));
 346           (void) WriteBlobByte(image,ScaleQuantumToChar(
 347              GetRedPixelComponent(p)));
 348         }
 349       pixel.red=(double) GetRedPixelComponent(p);
 350       pixel.green=(double) GetGreenPixelComponent(p);
 351       pixel.blue=(double) GetBluePixelComponent(p);
 352       full=full == MagickFalse ? MagickTrue : MagickFalse;
 353       p++;
 354     }
 355     status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 356       image->rows);
 357     if (status == MagickFalse)
 358       break;
 359   }
 360   uyvy_image=DestroyImage(uyvy_image);
 361   (void) CloseBlob(image);
 362   return(MagickTrue);
 363 }