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ImageMagick-7.0.10-22 /
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Name
Size
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.deps
[ DIR ]
drwxrwxr-x
.libs
[ DIR ]
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Code Editor : mpeg.c
/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % M M PPPP EEEEE GGGG % % MM MM P P E G % % M M M PPPP EEE G GG % % M M P E G G % % M M P EEEEE GGGG % % % % % % Read/Write MPEG Image Format % % % % Software Design % % Cristy % % July 1999 % % % % % % Copyright 1999-2020 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 % % % % https://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/constitute.h" #include "MagickCore/delegate.h" #include "MagickCore/exception.h" #include "MagickCore/exception-private.h" #include "MagickCore/geometry.h" #include "MagickCore/image.h" #include "MagickCore/image-private.h" #include "MagickCore/layer.h" #include "MagickCore/list.h" #include "MagickCore/log.h" #include "MagickCore/magick.h" #include "MagickCore/memory_.h" #include "MagickCore/resource_.h" #include "MagickCore/quantum-private.h" #include "MagickCore/static.h" #include "MagickCore/string_.h" #include "MagickCore/module.h" #include "MagickCore/transform.h" #include "MagickCore/utility.h" #include "MagickCore/utility-private.h" /* Forward declarations. */ static MagickBooleanType WriteMPEGImage(const ImageInfo *,Image *,ExceptionInfo *); /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % I s A V I % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % IsAVI() returns MagickTrue if the image format type, identified by the % magick string, is Audio/Video Interleaved file format. % % The format of the IsAVI method is: % % size_t IsAVI(const unsigned char *magick,const size_t length) % % A description of each parameter follows: % % o magick: compare image format pattern against these bytes. % % o length: Specifies the length of the magick string. % */ static MagickBooleanType IsAVI(const unsigned char *magick,const size_t length) { if (length < 4) return(MagickFalse); if (memcmp(magick,"RIFF",4) == 0) return(MagickTrue); return(MagickFalse); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % I s M P E G % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % IsMPEG() returns MagickTrue if the image format type, identified by the % magick string, is MPEG. % % The format of the IsMPEG method is: % % MagickBooleanType IsMPEG(const unsigned char *magick,const size_t length) % % A description of each parameter follows: % % o magick: compare image format pattern against these bytes. % % o length: Specifies the length of the magick string. % */ static MagickBooleanType IsMPEG(const unsigned char *magick,const size_t length) { if (length < 4) return(MagickFalse); if (memcmp(magick,"\000\000\001\263",4) == 0) return(MagickTrue); return(MagickFalse); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d M P E G I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadMPEGImage() reads an binary file in the MPEG video stream 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 ReadMPEGImage method is: % % Image *ReadMPEGImage(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 *ReadMPEGImage(const ImageInfo *image_info, ExceptionInfo *exception) { #define ReadMPEGIntermediateFormat "pam" Image *image, *images, *next; ImageInfo *read_info; MagickBooleanType status; /* Open image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickCoreSignature); if (image_info->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", image_info->filename); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickCoreSignature); image=AcquireImage(image_info,exception); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == MagickFalse) { image=DestroyImageList(image); return((Image *) NULL); } (void) CloseBlob(image); (void) DestroyImageList(image); /* Convert MPEG to PAM with delegate. */ images=(Image *) NULL; read_info=CloneImageInfo(image_info); image=AcquireImage(image_info,exception); status=InvokeDelegate(read_info,image,"mpeg:decode",(char *) NULL,exception); if (status != MagickFalse) { (void) FormatLocaleString(read_info->filename,MagickPathExtent,"%s.%s", read_info->unique,ReadMPEGIntermediateFormat); *read_info->magick='\0'; images=ReadImage(read_info,exception); if (images != (Image *) NULL) for (next=images; next != (Image *) NULL; next=next->next) { (void) CopyMagickString(next->filename,image->filename, MagickPathExtent); (void) CopyMagickString(next->magick,image->magick,MagickPathExtent); } (void) RelinquishUniqueFileResource(read_info->filename); } read_info=DestroyImageInfo(read_info); image=DestroyImage(image); return(images); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r M P E G I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterMPEGImage() adds attributes for the MPEG 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 RegisterMPEGImage method is: % % size_t RegisterMPEGImage(void) % */ ModuleExport size_t RegisterMPEGImage(void) { MagickInfo *entry; entry=AcquireMagickInfo("MPEG","3GP","Media Container"); entry->decoder=(DecodeImageHandler *) ReadMPEGImage; entry->flags^=CoderBlobSupportFlag; entry->flags|=CoderSeekableStreamFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("MPEG","3G2","Media Container"); entry->decoder=(DecodeImageHandler *) ReadMPEGImage; entry->flags^=CoderBlobSupportFlag; entry->flags|=CoderSeekableStreamFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("MPEG","AVI","Microsoft Audio/Visual Interleaved"); entry->decoder=(DecodeImageHandler *) ReadMPEGImage; entry->magick=(IsImageFormatHandler *) IsAVI; entry->flags^=CoderBlobSupportFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("MPEG","FLV","Flash Video Stream"); entry->decoder=(DecodeImageHandler *) ReadMPEGImage; entry->encoder=(EncodeImageHandler *) WriteMPEGImage; entry->magick=(IsImageFormatHandler *) IsMPEG; entry->flags^=CoderBlobSupportFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("MPEG","MKV","Multimedia Container"); entry->decoder=(DecodeImageHandler *) ReadMPEGImage; entry->encoder=(EncodeImageHandler *) WriteMPEGImage; entry->magick=(IsImageFormatHandler *) IsMPEG; entry->flags^=CoderBlobSupportFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("MPEG","MOV","MPEG Video Stream"); entry->decoder=(DecodeImageHandler *) ReadMPEGImage; entry->encoder=(EncodeImageHandler *) WriteMPEGImage; entry->magick=(IsImageFormatHandler *) IsMPEG; entry->flags^=CoderBlobSupportFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("MPEG","MPEG","MPEG Video Stream"); entry->decoder=(DecodeImageHandler *) ReadMPEGImage; entry->encoder=(EncodeImageHandler *) WriteMPEGImage; entry->magick=(IsImageFormatHandler *) IsMPEG; entry->flags^=CoderBlobSupportFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("MPEG","MPG","MPEG Video Stream"); entry->decoder=(DecodeImageHandler *) ReadMPEGImage; entry->encoder=(EncodeImageHandler *) WriteMPEGImage; entry->magick=(IsImageFormatHandler *) IsMPEG; entry->flags^=CoderBlobSupportFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("MPEG","MP4","MPEG-4 Video Stream"); entry->decoder=(DecodeImageHandler *) ReadMPEGImage; entry->encoder=(EncodeImageHandler *) WriteMPEGImage; entry->magick=(IsImageFormatHandler *) IsMPEG; entry->flags^=CoderBlobSupportFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("MPEG","M2V","MPEG Video Stream"); entry->decoder=(DecodeImageHandler *) ReadMPEGImage; entry->encoder=(EncodeImageHandler *) WriteMPEGImage; entry->magick=(IsImageFormatHandler *) IsMPEG; entry->flags^=CoderBlobSupportFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("MPEG","M4V","Raw MPEG-4 Video"); entry->decoder=(DecodeImageHandler *) ReadMPEGImage; entry->encoder=(EncodeImageHandler *) WriteMPEGImage; entry->magick=(IsImageFormatHandler *) IsMPEG; entry->flags^=CoderBlobSupportFlag; (void) RegisterMagickInfo(entry); entry=AcquireMagickInfo("MPEG","WMV","Windows Media Video"); entry->decoder=(DecodeImageHandler *) ReadMPEGImage; entry->encoder=(EncodeImageHandler *) WriteMPEGImage; entry->magick=(IsImageFormatHandler *) IsMPEG; entry->flags^=CoderBlobSupportFlag; (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r M P E G I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterMPEGImage() removes format registrations made by the % BIM module from the list of supported formats. % % The format of the UnregisterBIMImage method is: % % UnregisterMPEGImage(void) % */ ModuleExport void UnregisterMPEGImage(void) { (void) UnregisterMagickInfo("WMV"); (void) UnregisterMagickInfo("MOV"); (void) UnregisterMagickInfo("M4V"); (void) UnregisterMagickInfo("M2V"); (void) UnregisterMagickInfo("MP4"); (void) UnregisterMagickInfo("MPG"); (void) UnregisterMagickInfo("MPEG"); (void) UnregisterMagickInfo("MKV"); (void) UnregisterMagickInfo("AVI"); (void) UnregisterMagickInfo("3G2"); (void) UnregisterMagickInfo("3GP"); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % W r i t e M P E G I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % WriteMPEGImage() writes an image to a file in MPEG video stream format. % Lawrence Livermore National Laboratory (LLNL) contributed code to adjust % the MPEG parameters to correspond to the compression quality setting. % % The format of the WriteMPEGImage method is: % % MagickBooleanType WriteMPEGImage(const ImageInfo *image_info, % Image *image,ExceptionInfo *exception) % % A description of each parameter follows. % % o image_info: the image info. % % o image: The image. % % o exception: return any errors or warnings in this structure. % */ static MagickBooleanType CopyDelegateFile(const char *source, const char *destination) { int destination_file, source_file; MagickBooleanType status; register size_t i; size_t length, quantum; ssize_t count; struct stat attributes; unsigned char *buffer; /* Return if destination file already exists and is not empty. */ assert(source != (const char *) NULL); assert(destination != (char *) NULL); status=GetPathAttributes(destination,&attributes); if ((status != MagickFalse) && (attributes.st_size > 0)) return(MagickTrue); /* Copy source file to destination. */ if (strcmp(destination,"-") == 0) destination_file=fileno(stdout); else destination_file=open_utf8(destination,O_WRONLY | O_BINARY | O_CREAT, S_MODE); if (destination_file == -1) return(MagickFalse); source_file=open_utf8(source,O_RDONLY | O_BINARY,0); if (source_file == -1) { (void) close(destination_file); return(MagickFalse); } quantum=(size_t) MagickMaxBufferExtent; if ((fstat(source_file,&attributes) == 0) && (attributes.st_size > 0)) quantum=(size_t) MagickMin((double) attributes.st_size, MagickMaxBufferExtent); buffer=(unsigned char *) AcquireQuantumMemory(quantum,sizeof(*buffer)); if (buffer == (unsigned char *) NULL) { (void) close(source_file); (void) close(destination_file); return(MagickFalse); } length=0; for (i=0; ; i+=count) { count=(ssize_t) read(source_file,buffer,quantum); if (count <= 0) break; length=(size_t) count; count=(ssize_t) write(destination_file,buffer,length); if ((size_t) count != length) break; } if (strcmp(destination,"-") != 0) (void) close(destination_file); (void) close(source_file); buffer=(unsigned char *) RelinquishMagickMemory(buffer); return(i != 0 ? MagickTrue : MagickFalse); } static MagickBooleanType WriteMPEGImage(const ImageInfo *image_info, Image *image,ExceptionInfo *exception) { #define WriteMPEGIntermediateFormat "jpg" char basename[MagickPathExtent], filename[MagickPathExtent]; double delay; Image *coalesce_image; ImageInfo *write_info; int file; MagickBooleanType status; register Image *p; register ssize_t i; size_t count, length, scene; unsigned char *blob; /* Open output image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickCoreSignature); assert(image != (Image *) NULL); assert(image->signature == MagickCoreSignature); if (image->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickCoreSignature); status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); if (status == MagickFalse) return(status); (void) CloseBlob(image); /* Write intermediate files. */ coalesce_image=CoalesceImages(image,exception); if (coalesce_image == (Image *) NULL) return(MagickFalse); file=AcquireUniqueFileResource(basename); if (file != -1) file=close(file)-1; (void) FormatLocaleString(coalesce_image->filename,MagickPathExtent,"%s", basename); count=0; write_info=CloneImageInfo(image_info); *write_info->magick='\0'; for (p=coalesce_image; p != (Image *) NULL; p=GetNextImageInList(p)) { char previous_image[MagickPathExtent]; blob=(unsigned char *) NULL; length=0; scene=p->scene; delay=100.0*p->delay/MagickMax(1.0*p->ticks_per_second,1.0); for (i=0; i < (ssize_t) MagickMax((1.0*delay+1.0)/3.0,1.0); i++) { p->scene=count; count++; status=MagickFalse; switch (i) { case 0: { Image *frame; (void) FormatLocaleString(p->filename,MagickPathExtent,"%s%.20g.%s", basename,(double) p->scene,WriteMPEGIntermediateFormat); (void) FormatLocaleString(filename,MagickPathExtent,"%s%.20g.%s", basename,(double) p->scene,WriteMPEGIntermediateFormat); (void) FormatLocaleString(previous_image,MagickPathExtent, "%s%.20g.%s",basename,(double) p->scene, WriteMPEGIntermediateFormat); frame=CloneImage(p,0,0,MagickTrue,exception); if (frame == (Image *) NULL) break; status=WriteImage(write_info,frame,exception); frame=DestroyImage(frame); break; } case 1: { blob=(unsigned char *) FileToBlob(previous_image,~0UL,&length, exception); } default: { (void) FormatLocaleString(filename,MagickPathExtent,"%s%.20g.%s", basename,(double) p->scene,WriteMPEGIntermediateFormat); if (length > 0) status=BlobToFile(filename,blob,length,exception); break; } } if (image->debug != MagickFalse) { if (status != MagickFalse) (void) LogMagickEvent(CoderEvent,GetMagickModule(), "%.20g. Wrote %s file for scene %.20g:",(double) i, WriteMPEGIntermediateFormat,(double) p->scene); else (void) LogMagickEvent(CoderEvent,GetMagickModule(), "%.20g. Failed to write %s file for scene %.20g:",(double) i, WriteMPEGIntermediateFormat,(double) p->scene); (void) LogMagickEvent(CoderEvent,GetMagickModule(),"%s",filename); } } p->scene=scene; if (blob != (unsigned char *) NULL) blob=(unsigned char *) RelinquishMagickMemory(blob); if (status == MagickFalse) break; } /* Convert JPEG to MPEG. */ (void) CopyMagickString(coalesce_image->magick_filename,basename, MagickPathExtent); (void) CopyMagickString(coalesce_image->filename,basename,MagickPathExtent); GetPathComponent(image_info->filename,ExtensionPath,coalesce_image->magick); if (*coalesce_image->magick == '\0') (void) CopyMagickString(coalesce_image->magick,image->magick, MagickPathExtent); status=InvokeDelegate(write_info,coalesce_image,(char *) NULL,"mpeg:encode", exception); (void) FormatLocaleString(write_info->filename,MagickPathExtent,"%s.%s", write_info->unique,coalesce_image->magick); status=CopyDelegateFile(write_info->filename,image->filename); (void) RelinquishUniqueFileResource(write_info->filename); write_info=DestroyImageInfo(write_info); /* Relinquish resources. */ count=0; for (p=coalesce_image; p != (Image *) NULL; p=GetNextImageInList(p)) { delay=100.0*p->delay/MagickMax(1.0*p->ticks_per_second,1.0); for (i=0; i < (ssize_t) MagickMax((1.0*delay+1.0)/3.0,1.0); i++) { (void) FormatLocaleString(p->filename,MagickPathExtent,"%s%.20g.%s", basename,(double) count++,WriteMPEGIntermediateFormat); (void) RelinquishUniqueFileResource(p->filename); } (void) CopyMagickString(p->filename,image_info->filename,MagickPathExtent); } (void) RelinquishUniqueFileResource(basename); coalesce_image=DestroyImageList(coalesce_image); if (image->debug != MagickFalse) (void) LogMagickEvent(CoderEvent,GetMagickModule(),"exit"); return(status); }
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