/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U U Y Y V V Y Y % % U U Y Y V V Y Y % % U U Y V V Y % % U U Y V V Y % % UUU Y V Y % % % % % % Read/Write 16bit/pixel Interleaved YUV Image Format % % % % Software Design % % Cristy % % July 1992 % % % % % % Copyright 1999-2015 ImageMagick Studio LLC, a non-profit organization % % dedicated to making software imaging solutions freely available. % % % % You may not use this file except in compliance with the License. You may % % obtain a copy of the License at % % % % http://www.imagemagick.org/script/license.php % % % % Unless required by applicable law or agreed to in writing, software % % distributed under the License is distributed on an "AS IS" BASIS, % % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % % See the License for the specific language governing permissions and % % limitations under the License. % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % */ /* Include declarations. */ #include "MagickCore/studio.h" #include "MagickCore/blob.h" #include "MagickCore/blob-private.h" #include "MagickCore/cache.h" #include "MagickCore/color.h" #include "MagickCore/colorspace.h" #include "MagickCore/exception.h" #include "MagickCore/exception-private.h" #include "MagickCore/image.h" #include "MagickCore/image-private.h" #include "MagickCore/list.h" #include "MagickCore/magick.h" #include "MagickCore/memory_.h" #include "MagickCore/monitor.h" #include "MagickCore/monitor-private.h" #include "MagickCore/pixel-accessor.h" #include "MagickCore/quantum-private.h" #include "MagickCore/static.h" #include "MagickCore/string_.h" #include "MagickCore/module.h" /* Forward declarations. */ static MagickBooleanType WriteUYVYImage(const ImageInfo *,Image *,ExceptionInfo *); /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d U Y V Y I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadUYVYImage() reads an image in the UYVY format and returns it. It % allocates the memory necessary for the new Image structure and returns a % pointer to the new image. % % The format of the ReadUYVYImage method is: % % Image *ReadUYVYImage(const ImageInfo *image_info, % ExceptionInfo *exception) % % A description of each parameter follows: % % o image_info: the image info. % % o exception: return any errors or warnings in this structure. % */ static Image *ReadUYVYImage(const ImageInfo *image_info, ExceptionInfo *exception) { Image *image; MagickBooleanType status; register ssize_t x; register Quantum *q; ssize_t y; unsigned char u, v, y1, y2; /* Open image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickSignature); if (image_info->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", image_info->filename); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickSignature); image=AcquireImage(image_info,exception); if ((image->columns == 0) || (image->rows == 0)) ThrowReaderException(OptionError,"MustSpecifyImageSize"); if ((image->columns % 2) != 0) image->columns++; (void) CopyMagickString(image->filename,image_info->filename,MagickPathExtent); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == MagickFalse) return((Image *) NULL); if (DiscardBlobBytes(image,image->offset) == MagickFalse) ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", image->filename); image->depth=8; if (image_info->ping != MagickFalse) { (void) CloseBlob(image); return(GetFirstImageInList(image)); } status=SetImageExtent(image,image->columns,image->rows,exception); if (status == MagickFalse) return(DestroyImageList(image)); /* Accumulate UYVY, then unpack into two pixels. */ for (y=0; y < (ssize_t) image->rows; y++) { q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); if (q == (Quantum *) NULL) break; for (x=0; x < (ssize_t) (image->columns >> 1); x++) { u=(unsigned char) ReadBlobByte(image); y1=(unsigned char) ReadBlobByte(image); v=(unsigned char) ReadBlobByte(image); y2=(unsigned char) ReadBlobByte(image); SetPixelRed(image,ScaleCharToQuantum(y1),q); SetPixelGreen(image,ScaleCharToQuantum(u),q); SetPixelBlue(image,ScaleCharToQuantum(v),q); q+=GetPixelChannels(image); SetPixelRed(image,ScaleCharToQuantum(y2),q); SetPixelGreen(image,ScaleCharToQuantum(u),q); SetPixelBlue(image,ScaleCharToQuantum(v),q); q+=GetPixelChannels(image); } if (SyncAuthenticPixels(image,exception) == MagickFalse) break; status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, image->rows); if (status == MagickFalse) break; } SetImageColorspace(image,YCbCrColorspace,exception); if (EOFBlob(image) != MagickFalse) ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", image->filename); (void) CloseBlob(image); return(GetFirstImageInList(image)); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r U Y V Y I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterUYVYImage() adds attributes for the UYVY image format to % the list of supported formats. The attributes include the image format % tag, a method to read and/or write the format, whether the format % supports the saving of more than one frame to the same file or blob, % whether the format supports native in-memory I/O, and a brief % description of the format. % % The format of the RegisterUYVYImage method is: % % size_t RegisterUYVYImage(void) % */ ModuleExport size_t RegisterUYVYImage(void) { MagickInfo *entry; entry=AcquireMagickInfo("UYVY","PAL","16bit/pixel interleaved YUV"); entry->decoder=(DecodeImageHandler *) ReadUYVYImage; entry->encoder=(EncodeImageHandler *) WriteUYVYImage; entry->flags^=CoderAdjoinFlag; entry->flags|=CoderRawSupportFlag; entry->flags|=CoderEndianSupportFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("UYVY","UYVY","16bit/pixel interleaved YUV"); entry->decoder=(DecodeImageHandler *) ReadUYVYImage; entry->encoder=(EncodeImageHandler *) WriteUYVYImage; entry->flags^=CoderAdjoinFlag; entry->flags|=CoderRawSupportFlag; entry->flags|=CoderEndianSupportFlag; (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r U Y V Y I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterUYVYImage() removes format registrations made by the % UYVY module from the list of supported formats. % % The format of the UnregisterUYVYImage method is: % % UnregisterUYVYImage(void) % */ ModuleExport void UnregisterUYVYImage(void) { (void) UnregisterMagickInfo("PAL"); (void) UnregisterMagickInfo("UYVY"); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % W r i t e U Y V Y I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % WriteUYVYImage() writes an image to a file in the digital UYVY % format. This format, used by AccomWSD, is not dramatically higher quality % than the 12bit/pixel YUV format, but has better locality. % % The format of the WriteUYVYImage method is: % % MagickBooleanType WriteUYVYImage(const ImageInfo *image_info, % Image *image,ExceptionInfo *exception) % % A description of each parameter follows. % % o image_info: the image info. % % o image: The image. Implicit assumption: number of columns is even. % % o exception: return any errors or warnings in this structure. % */ static MagickBooleanType WriteUYVYImage(const ImageInfo *image_info, Image *image,ExceptionInfo *exception) { PixelInfo pixel; Image *uyvy_image; MagickBooleanType full, status; register const Quantum *p; register ssize_t x; ssize_t y; /* Open output image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickSignature); assert(image != (Image *) NULL); assert(image->signature == MagickSignature); if (image->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); if ((image->columns % 2) != 0) image->columns++; assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickSignature); status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); if (status == MagickFalse) return(status); /* Accumulate two pixels, then output. */ uyvy_image=CloneImage(image,0,0,MagickTrue,exception); if (uyvy_image == (Image *) NULL) return(MagickFalse); (void) TransformImageColorspace(uyvy_image,YCbCrColorspace,exception); full=MagickFalse; (void) ResetMagickMemory(&pixel,0,sizeof(PixelInfo)); for (y=0; y < (ssize_t) image->rows; y++) { p=GetVirtualPixels(uyvy_image,0,y,image->columns,1,exception); if (p == (const Quantum *) NULL) break; for (x=0; x < (ssize_t) image->columns; x++) { if (full != MagickFalse) { pixel.green=(pixel.green+GetPixelGreen(uyvy_image,p))/2; pixel.blue=(pixel.blue+GetPixelBlue(uyvy_image,p))/2; (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.green)); (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.red)); (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.blue)); (void) WriteBlobByte(image,ScaleQuantumToChar( GetPixelRed(uyvy_image,p))); } pixel.red=(double) GetPixelRed(uyvy_image,p); pixel.green=(double) GetPixelGreen(uyvy_image,p); pixel.blue=(double) GetPixelBlue(uyvy_image,p); full=full == MagickFalse ? MagickTrue : MagickFalse; p+=GetPixelChannels(uyvy_image); } status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, image->rows); if (status == MagickFalse) break; } uyvy_image=DestroyImage(uyvy_image); (void) CloseBlob(image); return(MagickTrue); }