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 1999-2010 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 */
  96 static Image *ReadUYVYImage(const ImageInfo *image_info,
  97   ExceptionInfo *exception)
  98 {
  99   Image
 100     *image;
 101
 102   long
 103     y;
 104
 105   MagickBooleanType
 106     status;
 107
 108   register long
 109     x;
 110
 111   register PixelPacket
 112     *q;
 113
 114   register long
 115     i;
 116
 117   unsigned char
 118     u,
 119     v,
 120     y1,
 121     y2;
 122
 123   /*
 124     Open image file.
 125   */
 126   assert(image_info != (const ImageInfo *) NULL);
 127   assert(image_info->signature == MagickSignature);
 128   if (image_info->debug != MagickFalse)
 129     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 130       image_info->filename);
 131   assert(exception != (ExceptionInfo *) NULL);
 132   assert(exception->signature == MagickSignature);
 133   image=AcquireImage(image_info);
 134   if ((image->columns == 0) || (image->rows == 0))
 135     ThrowReaderException(OptionError,"MustSpecifyImageSize");
 136   if ((image->columns % 2) != 0)
 137     image->columns++;
 138   (void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent);
 139   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 140   if (status == MagickFalse)
 141     return((Image *) NULL);
 142   for (i=0; i < image->offset; i++)
 143     if (ReadBlobByte(image) == EOF)
 144       {
 145         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 146           image->filename);
 147         break;
 148       }
 149   image->depth=8;
 150   if (image_info->ping != MagickFalse)
 151     {
 152       (void) CloseBlob(image);
 153       return(GetFirstImageInList(image));
 154     }
 155   /*
 156     Accumulate UYVY, then unpack into two pixels.
 157   */
 158   for (y=0; y < (long) image->rows; y++)
 159   {
 160     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 161     if (q == (PixelPacket *) NULL)
 162       break;
 163     for (x=0; x < (long) (image->columns >> 1); x++)
 164     {
 165       u=(unsigned char) ReadBlobByte(image);
 166       y1=(unsigned char) ReadBlobByte(image);
 167       v=(unsigned char) ReadBlobByte(image);
 168       y2=(unsigned char) ReadBlobByte(image);
 169       q->red=ScaleCharToQuantum(y1);
 170       q->green=ScaleCharToQuantum(u);
 171       q->blue=ScaleCharToQuantum(v);
 172       q++;
 173       q->red=ScaleCharToQuantum(y2);
 174       q->green=ScaleCharToQuantum(u);
 175       q->blue=ScaleCharToQuantum(v);
 176       q++;
 177     }
 178     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 179       break;
 180     status=SetImageProgress(image,LoadImageTag,y,image->rows);
 181     if (status == MagickFalse)
 182       break;
 183   }
 184   image->colorspace=YCbCrColorspace;
 185   if (EOFBlob(image) != MagickFalse)
 186     ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 187       image->filename);
 188   (void) CloseBlob(image);
 189   return(GetFirstImageInList(image));
 190 }
 191 \f
 192 /*
 193 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 194 %                                                                             %
 195 %                                                                             %
 196 %                                                                             %
 197 %   R e g i s t e r U Y V Y I m a g e                                         %
 198 %                                                                             %
 199 %                                                                             %
 200 %                                                                             %
 201 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 202 %
 203 %  RegisterUYVYImage() adds attributes for the UYVY image format to
 204 %  the list of supported formats.  The attributes include the image format
 205 %  tag, a method to read and/or write the format, whether the format
 206 %  supports the saving of more than one frame to the same file or blob,
 207 %  whether the format supports native in-memory I/O, and a brief
 208 %  description of the format.
 209 %
 210 %  The format of the RegisterUYVYImage method is:
 211 %
 212 %      unsigned long RegisterUYVYImage(void)
 213 %
 214 */
 215 ModuleExport unsigned long RegisterUYVYImage(void)
 216 {
 217   MagickInfo
 218     *entry;
 219
 220   entry=SetMagickInfo("PAL");
 221   entry->decoder=(DecodeImageHandler *) ReadUYVYImage;
 222   entry->encoder=(EncodeImageHandler *) WriteUYVYImage;
 223   entry->adjoin=MagickFalse;
 224   entry->raw=MagickTrue;
 225   entry->endian_support=MagickTrue;
 226   entry->description=ConstantString("16bit/pixel interleaved YUV");
 227   entry->module=ConstantString("UYVY");
 228   (void) RegisterMagickInfo(entry);
 229   entry=SetMagickInfo("UYVY");
 230   entry->decoder=(DecodeImageHandler *) ReadUYVYImage;
 231   entry->encoder=(EncodeImageHandler *) WriteUYVYImage;
 232   entry->adjoin=MagickFalse;
 233   entry->raw=MagickTrue;
 234   entry->endian_support=MagickTrue;
 235   entry->description=ConstantString("16bit/pixel interleaved YUV");
 236   entry->module=ConstantString("UYVY");
 237   (void) RegisterMagickInfo(entry);
 238   return(MagickImageCoderSignature);
 239 }
 240 \f
 241 /*
 242 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 243 %                                                                             %
 244 %                                                                             %
 245 %                                                                             %
 246 %   U n r e g i s t e r U Y V Y I m a g e                                     %
 247 %                                                                             %
 248 %                                                                             %
 249 %                                                                             %
 250 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 251 %
 252 %  UnregisterUYVYImage() removes format registrations made by the
 253 %  UYVY module from the list of supported formats.
 254 %
 255 %  The format of the UnregisterUYVYImage method is:
 256 %
 257 %      UnregisterUYVYImage(void)
 258 %
 259 */
 260 ModuleExport void UnregisterUYVYImage(void)
 261 {
 262   (void) UnregisterMagickInfo("PAL");
 263   (void) UnregisterMagickInfo("UYVY");
 264 }
 265 \f
 266 /*
 267 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 268 %                                                                             %
 269 %                                                                             %
 270 %                                                                             %
 271 %   W r i t e U Y V Y I m a g e                                               %
 272 %                                                                             %
 273 %                                                                             %
 274 %                                                                             %
 275 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 276 %
 277 %  WriteUYVYImage() writes an image to a file in the digital UYVY
 278 %  format.  This format, used by AccomWSD, is not dramatically higher quality
 279 %  than the 12bit/pixel YUV format, but has better locality.
 280 %
 281 %  The format of the WriteUYVYImage method is:
 282 %
 283 %      MagickBooleanType WriteUYVYImage(const ImageInfo *image_info,
 284 %        Image *image)
 285 %
 286 %  A description of each parameter follows.
 287 %
 288 %    o image_info: the image info.
 289 %
 290 %    o image:  The image.
 291 %      Implicit assumption: number of columns is even.
 292 %
 293 */
 294 static MagickBooleanType WriteUYVYImage(const ImageInfo *image_info,
 295   Image *image)
 296 {
 297   MagickPixelPacket
 298     pixel;
 299
 300   Image
 301     *uyvy_image;
 302
 303   long
 304     y;
 305
 306   MagickBooleanType
 307     full,
 308     status;
 309
 310   register const PixelPacket
 311     *p;
 312
 313   register long
 314     x;
 315
 316   /*
 317     Open output image file.
 318   */
 319   assert(image_info != (const ImageInfo *) NULL);
 320   assert(image_info->signature == MagickSignature);
 321   assert(image != (Image *) NULL);
 322   assert(image->signature == MagickSignature);
 323   if (image->debug != MagickFalse)
 324     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 325   if ((image->columns % 2) != 0)
 326     image->columns++;
 327   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
 328   if (status == MagickFalse)
 329     return(status);
 330   /*
 331     Accumulate two pixels, then output.
 332   */
 333   uyvy_image=CloneImage(image,0,0,MagickTrue,&image->exception);
 334   if (uyvy_image == (Image *) NULL)
 335     ThrowWriterException(ResourceLimitError,image->exception.reason);
 336   (void) TransformImageColorspace(uyvy_image,YCbCrColorspace);
 337   full=MagickFalse;
 338   (void) ResetMagickMemory(&pixel,0,sizeof(MagickPixelPacket));
 339   for (y=0; y < (long) image->rows; y++)
 340   {
 341     p=GetVirtualPixels(uyvy_image,0,y,image->columns,1,&image->exception);
 342     if (p == (const PixelPacket *) NULL)
 343       break;
 344     for (x=0; x < (long) image->columns; x++)
 345     {
 346       if (full != MagickFalse)
 347         {
 348           pixel.green=(pixel.green+GetGreenPixelComponent(p))/2;
 349           pixel.blue=(pixel.blue+GetBluePixelComponent(p))/2;
 350           (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.green));
 351           (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.red));
 352           (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.blue));
 353           (void) WriteBlobByte(image,ScaleQuantumToChar(GetRedPixelComponent(p)));
 354         }
 355       pixel.red=(double) GetRedPixelComponent(p);
 356       pixel.green=(double) GetGreenPixelComponent(p);
 357       pixel.blue=(double) GetBluePixelComponent(p);
 358       full=full == MagickFalse ? MagickTrue : MagickFalse;
 359       p++;
 360     }
 361     status=SetImageProgress(image,LoadImageTag,y,image->rows);
 362     if (status == MagickFalse)
 363       break;
 364   }
 365   uyvy_image=DestroyImage(uyvy_image);
 366   (void) CloseBlob(image);
 367   return(MagickTrue);
 368 }