| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % 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 % |
| % John Cristy % |
| % July 1992 % |
| % % |
| % % |
| % Copyright 1999-2010 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 "magick/studio.h" |
| #include "magick/blob.h" |
| #include "magick/blob-private.h" |
| #include "magick/cache.h" |
| #include "magick/color.h" |
| #include "magick/colorspace.h" |
| #include "magick/exception.h" |
| #include "magick/exception-private.h" |
| #include "magick/image.h" |
| #include "magick/image-private.h" |
| #include "magick/list.h" |
| #include "magick/magick.h" |
| #include "magick/memory_.h" |
| #include "magick/monitor.h" |
| #include "magick/monitor-private.h" |
| #include "magick/quantum-private.h" |
| #include "magick/static.h" |
| #include "magick/string_.h" |
| #include "magick/module.h" |
| |
| /* |
| Forward declarations. |
| */ |
| static MagickBooleanType |
| WriteUYVYImage(const ImageInfo *,Image *); |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % 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; |
| |
| long |
| y; |
| |
| MagickBooleanType |
| status; |
| |
| register long |
| x; |
| |
| register PixelPacket |
| *q; |
| |
| register long |
| i; |
| |
| 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); |
| if ((image->columns == 0) || (image->rows == 0)) |
| ThrowReaderException(OptionError,"MustSpecifyImageSize"); |
| if ((image->columns % 2) != 0) |
| image->columns++; |
| (void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent); |
| status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); |
| if (status == MagickFalse) |
| return((Image *) NULL); |
| for (i=0; i < image->offset; i++) |
| if (ReadBlobByte(image) == EOF) |
| { |
| ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", |
| image->filename); |
| break; |
| } |
| image->depth=8; |
| if (image_info->ping != MagickFalse) |
| { |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| /* |
| Accumulate UYVY, then unpack into two pixels. |
| */ |
| for (y=0; y < (long) image->rows; y++) |
| { |
| q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); |
| if (q == (PixelPacket *) NULL) |
| break; |
| for (x=0; x < (long) (image->columns >> 1); x++) |
| { |
| u=(unsigned char) ReadBlobByte(image); |
| y1=(unsigned char) ReadBlobByte(image); |
| v=(unsigned char) ReadBlobByte(image); |
| y2=(unsigned char) ReadBlobByte(image); |
| q->red=ScaleCharToQuantum(y1); |
| q->green=ScaleCharToQuantum(u); |
| q->blue=ScaleCharToQuantum(v); |
| q++; |
| q->red=ScaleCharToQuantum(y2); |
| q->green=ScaleCharToQuantum(u); |
| q->blue=ScaleCharToQuantum(v); |
| q++; |
| } |
| if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| break; |
| status=SetImageProgress(image,LoadImageTag,y,image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| image->colorspace=YCbCrColorspace; |
| 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: |
| % |
| % unsigned long RegisterUYVYImage(void) |
| % |
| */ |
| ModuleExport unsigned long RegisterUYVYImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=SetMagickInfo("PAL"); |
| entry->decoder=(DecodeImageHandler *) ReadUYVYImage; |
| entry->encoder=(EncodeImageHandler *) WriteUYVYImage; |
| entry->adjoin=MagickFalse; |
| entry->raw=MagickTrue; |
| entry->endian_support=MagickTrue; |
| entry->description=ConstantString("16bit/pixel interleaved YUV"); |
| entry->module=ConstantString("UYVY"); |
| (void) RegisterMagickInfo(entry); |
| entry=SetMagickInfo("UYVY"); |
| entry->decoder=(DecodeImageHandler *) ReadUYVYImage; |
| entry->encoder=(EncodeImageHandler *) WriteUYVYImage; |
| entry->adjoin=MagickFalse; |
| entry->raw=MagickTrue; |
| entry->endian_support=MagickTrue; |
| entry->description=ConstantString("16bit/pixel interleaved YUV"); |
| entry->module=ConstantString("UYVY"); |
| (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) |
| % |
| % A description of each parameter follows. |
| % |
| % o image_info: the image info. |
| % |
| % o image: The image. |
| % Implicit assumption: number of columns is even. |
| % |
| */ |
| static MagickBooleanType WriteUYVYImage(const ImageInfo *image_info, |
| Image *image) |
| { |
| MagickPixelPacket |
| pixel; |
| |
| Image |
| *uyvy_image; |
| |
| long |
| y; |
| |
| MagickBooleanType |
| full, |
| status; |
| |
| register const PixelPacket |
| *p; |
| |
| register long |
| x; |
| |
| /* |
| 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++; |
| status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception); |
| if (status == MagickFalse) |
| return(status); |
| /* |
| Accumulate two pixels, then output. |
| */ |
| uyvy_image=CloneImage(image,0,0,MagickTrue,&image->exception); |
| if (uyvy_image == (Image *) NULL) |
| ThrowWriterException(ResourceLimitError,image->exception.reason); |
| (void) TransformImageColorspace(uyvy_image,YCbCrColorspace); |
| full=MagickFalse; |
| (void) ResetMagickMemory(&pixel,0,sizeof(MagickPixelPacket)); |
| for (y=0; y < (long) image->rows; y++) |
| { |
| p=GetVirtualPixels(uyvy_image,0,y,image->columns,1,&image->exception); |
| if (p == (const PixelPacket *) NULL) |
| break; |
| for (x=0; x < (long) image->columns; x++) |
| { |
| if (full != MagickFalse) |
| { |
| pixel.green=(pixel.green+GetGreenPixelComponent(p))/2; |
| pixel.blue=(pixel.blue+GetBluePixelComponent(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(GetRedPixelComponent(p))); |
| } |
| pixel.red=(double) GetRedPixelComponent(p); |
| pixel.green=(double) GetGreenPixelComponent(p); |
| pixel.blue=(double) GetBluePixelComponent(p); |
| full=full == MagickFalse ? MagickTrue : MagickFalse; |
| p++; |
| } |
| status=SetImageProgress(image,LoadImageTag,y,image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| uyvy_image=DestroyImage(uyvy_image); |
| (void) CloseBlob(image); |
| return(MagickTrue); |
| } |