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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% U U Y Y V V Y Y %
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% U U Y Y V V Y Y %
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% U U Y V V Y %
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% U U Y V V Y %
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% UUU Y V Y %
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% %
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% %
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% Read/Write 16bit/pixel Interleaved YUV Image Format %
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% %
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% Software Design %
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% Cristy %
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% July 1992 %
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% %
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% %
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% Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization %
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% dedicated to making software imaging solutions freely available. %
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% %
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% You may not use this file except in compliance with the License. You may %
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% obtain a copy of the License at %
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% %
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% https://imagemagick.org/script/license.php %
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% %
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% Unless required by applicable law or agreed to in writing, software %
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% distributed under the License is distributed on an "AS IS" BASIS, %
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
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% See the License for the specific language governing permissions and %
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% limitations under the License. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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%
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*/
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/*
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Include declarations.
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*/
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#include "MagickCore/studio.h"
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#include "MagickCore/blob.h"
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#include "MagickCore/blob-private.h"
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#include "MagickCore/cache.h"
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#include "MagickCore/color.h"
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#include "MagickCore/colorspace.h"
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#include "MagickCore/exception.h"
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#include "MagickCore/exception-private.h"
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#include "MagickCore/image.h"
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#include "MagickCore/image-private.h"
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#include "MagickCore/list.h"
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#include "MagickCore/magick.h"
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#include "MagickCore/memory_.h"
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#include "MagickCore/monitor.h"
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#include "MagickCore/monitor-private.h"
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#include "MagickCore/pixel-accessor.h"
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#include "MagickCore/quantum-private.h"
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#include "MagickCore/static.h"
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#include "MagickCore/string_.h"
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#include "MagickCore/module.h"
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/*
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Forward declarations.
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*/
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static MagickBooleanType
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WriteUYVYImage(const ImageInfo *,Image *,ExceptionInfo *);
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% R e a d U Y V Y I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% ReadUYVYImage() reads an image in the UYVY format and returns it. It
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% allocates the memory necessary for the new Image structure and returns a
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% pointer to the new image.
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%
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% The format of the ReadUYVYImage method is:
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%
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% Image *ReadUYVYImage(const ImageInfo *image_info,
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% ExceptionInfo *exception)
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%
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% A description of each parameter follows:
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%
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% o image_info: the image info.
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%
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% o exception: return any errors or warnings in this structure.
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%
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*/
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static Image *ReadUYVYImage(const ImageInfo *image_info,
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ExceptionInfo *exception)
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{
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Image
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*image;
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MagickBooleanType
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status;
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ssize_t
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x;
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Quantum
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*q;
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ssize_t
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y;
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unsigned char
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u,
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v,
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y1,
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y2;
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/*
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Open image file.
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*/
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickCoreSignature);
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if (image_info->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
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image_info->filename);
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assert(exception != (ExceptionInfo *) NULL);
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assert(exception->signature == MagickCoreSignature);
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image=AcquireImage(image_info,exception);
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if ((image->columns == 0) || (image->rows == 0))
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ThrowReaderException(OptionError,"MustSpecifyImageSize");
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if ((image->columns % 2) != 0)
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image->columns++;
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(void) CopyMagickString(image->filename,image_info->filename,
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MagickPathExtent);
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status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
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if (status == MagickFalse)
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return(DestroyImage(image));
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if (DiscardBlobBytes(image,image->offset) == MagickFalse)
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ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
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image->filename);
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image->depth=8;
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if (image_info->ping != MagickFalse)
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{
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(void) CloseBlob(image);
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return(GetFirstImageInList(image));
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}
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status=SetImageExtent(image,image->columns,image->rows,exception);
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if (status == MagickFalse)
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return(DestroyImageList(image));
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/*
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Accumulate UYVY, then unpack into two pixels.
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*/
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for (y=0; y < (ssize_t) image->rows; y++)
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{
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q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
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if (q == (Quantum *) NULL)
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break;
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for (x=0; x < (ssize_t) (image->columns >> 1); x++)
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{
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u=(unsigned char) ReadBlobByte(image);
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y1=(unsigned char) ReadBlobByte(image);
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v=(unsigned char) ReadBlobByte(image);
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y2=(unsigned char) ReadBlobByte(image);
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SetPixelRed(image,ScaleCharToQuantum(y1),q);
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SetPixelGreen(image,ScaleCharToQuantum(u),q);
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SetPixelBlue(image,ScaleCharToQuantum(v),q);
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q+=GetPixelChannels(image);
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SetPixelRed(image,ScaleCharToQuantum(y2),q);
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SetPixelGreen(image,ScaleCharToQuantum(u),q);
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SetPixelBlue(image,ScaleCharToQuantum(v),q);
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q+=GetPixelChannels(image);
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}
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if (SyncAuthenticPixels(image,exception) == MagickFalse)
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break;
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status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
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image->rows);
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if (status == MagickFalse)
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break;
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}
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SetImageColorspace(image,YCbCrColorspace,exception);
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if (EOFBlob(image) != MagickFalse)
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ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
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image->filename);
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(void) CloseBlob(image);
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return(GetFirstImageInList(image));
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% R e g i s t e r U Y V Y I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% RegisterUYVYImage() adds attributes for the UYVY image format to
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% the list of supported formats. The attributes include the image format
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% tag, a method to read and/or write the format, whether the format
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% supports the saving of more than one frame to the same file or blob,
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% whether the format supports native in-memory I/O, and a brief
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% description of the format.
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%
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% The format of the RegisterUYVYImage method is:
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%
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% size_t RegisterUYVYImage(void)
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%
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*/
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ModuleExport size_t RegisterUYVYImage(void)
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{
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MagickInfo
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*entry;
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entry=AcquireMagickInfo("UYVY","PAL","16bit/pixel interleaved YUV");
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entry->decoder=(DecodeImageHandler *) ReadUYVYImage;
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entry->encoder=(EncodeImageHandler *) WriteUYVYImage;
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entry->flags^=CoderAdjoinFlag;
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entry->flags|=CoderRawSupportFlag;
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entry->flags|=CoderEndianSupportFlag;
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(void) RegisterMagickInfo(entry);
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entry=AcquireMagickInfo("UYVY","UYVY","16bit/pixel interleaved YUV");
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entry->decoder=(DecodeImageHandler *) ReadUYVYImage;
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entry->encoder=(EncodeImageHandler *) WriteUYVYImage;
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entry->flags^=CoderAdjoinFlag;
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entry->flags|=CoderRawSupportFlag;
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entry->flags|=CoderEndianSupportFlag;
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(void) RegisterMagickInfo(entry);
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return(MagickImageCoderSignature);
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% U n r e g i s t e r U Y V Y I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% UnregisterUYVYImage() removes format registrations made by the
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% UYVY module from the list of supported formats.
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%
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% The format of the UnregisterUYVYImage method is:
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%
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% UnregisterUYVYImage(void)
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%
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*/
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ModuleExport void UnregisterUYVYImage(void)
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{
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(void) UnregisterMagickInfo("PAL");
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(void) UnregisterMagickInfo("UYVY");
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% W r i t e U Y V Y I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% WriteUYVYImage() writes an image to a file in the digital UYVY
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% format. This format, used by AccomWSD, is not dramatically higher quality
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% than the 12bit/pixel YUV format, but has better locality.
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%
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% The format of the WriteUYVYImage method is:
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%
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% MagickBooleanType WriteUYVYImage(const ImageInfo *image_info,
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% Image *image,ExceptionInfo *exception)
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%
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% A description of each parameter follows.
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%
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% o image_info: the image info.
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%
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% o image: The image. Implicit assumption: number of columns is even.
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%
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% o exception: return any errors or warnings in this structure.
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%
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*/
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static MagickBooleanType WriteUYVYImage(const ImageInfo *image_info,
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Image *image,ExceptionInfo *exception)
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{
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PixelInfo
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pixel;
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Image
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*uyvy_image;
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MagickBooleanType
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full,
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status;
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const Quantum
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*p;
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ssize_t
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x;
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ssize_t
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y;
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/*
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Open output image file.
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*/
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickCoreSignature);
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assert(image != (Image *) NULL);
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assert(image->signature == MagickCoreSignature);
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if (image->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
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if ((image->columns % 2) != 0)
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image->columns++;
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assert(exception != (ExceptionInfo *) NULL);
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assert(exception->signature == MagickCoreSignature);
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status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
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if (status == MagickFalse)
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return(status);
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/*
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Accumulate two pixels, then output.
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*/
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uyvy_image=CloneImage(image,0,0,MagickTrue,exception);
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if (uyvy_image == (Image *) NULL)
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return(MagickFalse);
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(void) TransformImageColorspace(uyvy_image,YCbCrColorspace,exception);
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full=MagickFalse;
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(void) memset(&pixel,0,sizeof(PixelInfo));
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for (y=0; y < (ssize_t) image->rows; y++)
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{
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p=GetVirtualPixels(uyvy_image,0,y,image->columns,1,exception);
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if (p == (const Quantum *) NULL)
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break;
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for (x=0; x < (ssize_t) image->columns; x++)
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{
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if (full != MagickFalse)
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{
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pixel.green=(pixel.green+GetPixelGreen(uyvy_image,p))/2;
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pixel.blue=(pixel.blue+GetPixelBlue(uyvy_image,p))/2;
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(void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.green));
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(void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.red));
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(void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.blue));
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(void) WriteBlobByte(image,ScaleQuantumToChar(
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GetPixelRed(uyvy_image,p)));
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}
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pixel.red=(double) GetPixelRed(uyvy_image,p);
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pixel.green=(double) GetPixelGreen(uyvy_image,p);
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pixel.blue=(double) GetPixelBlue(uyvy_image,p);
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full=full == MagickFalse ? MagickTrue : MagickFalse;
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p+=GetPixelChannels(uyvy_image);
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}
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status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
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image->rows);
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if (status == MagickFalse)
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break;
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}
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uyvy_image=DestroyImage(uyvy_image);
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(void) CloseBlob(image);
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return(MagickTrue);
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}
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