| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % 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 % |
| % John Cristy % |
| % July 1999 % |
| % % |
| % % |
| % 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/constitute.h" |
| #include "magick/delegate.h" |
| #include "magick/exception.h" |
| #include "magick/exception-private.h" |
| #include "magick/geometry.h" |
| #include "magick/image.h" |
| #include "magick/image-private.h" |
| #include "magick/layer.h" |
| #include "magick/list.h" |
| #include "magick/log.h" |
| #include "magick/magick.h" |
| #include "magick/memory_.h" |
| #include "magick/resource_.h" |
| #include "magick/quantum-private.h" |
| #include "magick/static.h" |
| #include "magick/string_.h" |
| #include "magick/module.h" |
| #include "magick/transform.h" |
| #include "magick/utility.h" |
| |
| /* |
| Forward declarations. |
| */ |
| static MagickBooleanType |
| WriteMPEGImage(const ImageInfo *image_info,Image *image); |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % 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: |
| % |
| % unsigned long 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; |
| |
| ImageInfo |
| *read_info; |
| |
| MagickBooleanType |
| status; |
| |
| /* |
| 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); |
| 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. |
| */ |
| read_info=CloneImageInfo(image_info); |
| image=AcquireImage(image_info); |
| (void) InvokeDelegate(read_info,image,"mpeg:decode",(char *) NULL,exception); |
| image=DestroyImage(image); |
| (void) FormatMagickString(read_info->filename,MaxTextExtent,"%s.%s", |
| read_info->unique,ReadMPEGIntermediateFormat); |
| images=ReadImage(read_info,exception); |
| (void) RelinquishUniqueFileResource(read_info->filename); |
| read_info=DestroyImageInfo(read_info); |
| 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: |
| % |
| % unsigned long RegisterMPEGImage(void) |
| % |
| */ |
| ModuleExport unsigned long RegisterMPEGImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=SetMagickInfo("AVI"); |
| entry->decoder=(DecodeImageHandler *) ReadMPEGImage; |
| entry->magick=(IsImageFormatHandler *) IsAVI; |
| entry->description=ConstantString("Microsoft Audio/Visual Interleaved"); |
| entry->module=ConstantString("AVI"); |
| (void) RegisterMagickInfo(entry); |
| entry=SetMagickInfo("MOV"); |
| entry->decoder=(DecodeImageHandler *) ReadMPEGImage; |
| entry->encoder=(EncodeImageHandler *) WriteMPEGImage; |
| entry->magick=(IsImageFormatHandler *) IsMPEG; |
| entry->blob_support=MagickFalse; |
| entry->description=ConstantString("MPEG Video Stream"); |
| entry->module=ConstantString("MPEG"); |
| (void) RegisterMagickInfo(entry); |
| entry=SetMagickInfo("MPEG"); |
| entry->decoder=(DecodeImageHandler *) ReadMPEGImage; |
| entry->encoder=(EncodeImageHandler *) WriteMPEGImage; |
| entry->magick=(IsImageFormatHandler *) IsMPEG; |
| entry->blob_support=MagickFalse; |
| entry->description=ConstantString("MPEG Video Stream"); |
| entry->module=ConstantString("MPEG"); |
| (void) RegisterMagickInfo(entry); |
| entry=SetMagickInfo("MPG"); |
| entry->decoder=(DecodeImageHandler *) ReadMPEGImage; |
| entry->encoder=(EncodeImageHandler *) WriteMPEGImage; |
| entry->magick=(IsImageFormatHandler *) IsMPEG; |
| entry->blob_support=MagickFalse; |
| entry->description=ConstantString("MPEG Video Stream"); |
| entry->module=ConstantString("MPEG"); |
| (void) RegisterMagickInfo(entry); |
| entry=SetMagickInfo("MP4"); |
| entry->decoder=(DecodeImageHandler *) ReadMPEGImage; |
| entry->encoder=(EncodeImageHandler *) WriteMPEGImage; |
| entry->magick=(IsImageFormatHandler *) IsMPEG; |
| entry->blob_support=MagickFalse; |
| entry->description=ConstantString("MPEG-4 Video Stream"); |
| entry->module=ConstantString("MPEG"); |
| (void) RegisterMagickInfo(entry); |
| entry=SetMagickInfo("M2V"); |
| entry->decoder=(DecodeImageHandler *) ReadMPEGImage; |
| entry->encoder=(EncodeImageHandler *) WriteMPEGImage; |
| entry->magick=(IsImageFormatHandler *) IsMPEG; |
| entry->blob_support=MagickFalse; |
| entry->description=ConstantString("MPEG Video Stream"); |
| entry->module=ConstantString("MPEG"); |
| (void) RegisterMagickInfo(entry); |
| entry=SetMagickInfo("M4V"); |
| entry->decoder=(DecodeImageHandler *) ReadMPEGImage; |
| entry->encoder=(EncodeImageHandler *) WriteMPEGImage; |
| entry->magick=(IsImageFormatHandler *) IsMPEG; |
| entry->blob_support=MagickFalse; |
| entry->description=ConstantString("Raw MPEG-4 Video"); |
| entry->module=ConstantString("MPEG"); |
| (void) RegisterMagickInfo(entry); |
| entry=SetMagickInfo("WMV"); |
| entry->decoder=(DecodeImageHandler *) ReadMPEGImage; |
| entry->encoder=(EncodeImageHandler *) WriteMPEGImage; |
| entry->magick=(IsImageFormatHandler *) IsMPEG; |
| entry->blob_support=MagickFalse; |
| entry->description=ConstantString("Windows Media Video"); |
| entry->module=ConstantString("MPEG"); |
| (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("M4V"); |
| (void) UnregisterMagickInfo("M2V"); |
| (void) UnregisterMagickInfo("MP4"); |
| (void) UnregisterMagickInfo("MPG"); |
| (void) UnregisterMagickInfo("MPEG"); |
| (void) UnregisterMagickInfo("MOV"); |
| (void) UnregisterMagickInfo("AVI"); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % 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) |
| % |
| % A description of each parameter follows. |
| % |
| % o image_info: the image info. |
| % |
| % o image: The image. |
| % |
| */ |
| |
| static inline double MagickMax(const double x,const double y) |
| { |
| if (x > y) |
| return(x); |
| return(y); |
| } |
| |
| static inline double MagickMin(const double x,const double y) |
| { |
| if (x < y) |
| return(x); |
| return(y); |
| } |
| |
| 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. |
| */ |
| destination_file=open(destination,O_WRONLY | O_BINARY | O_CREAT,S_MODE); |
| if (destination_file == -1) |
| return(MagickFalse); |
| source_file=open(source,O_RDONLY | O_BINARY); |
| 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; |
| } |
| (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) |
| { |
| #define WriteMPEGIntermediateFormat "jpg" |
| |
| char |
| basename[MaxTextExtent], |
| filename[MaxTextExtent]; |
| |
| double |
| delay; |
| |
| Image |
| *coalesce_image; |
| |
| ImageInfo |
| *write_info; |
| |
| int |
| file; |
| |
| MagickBooleanType |
| status; |
| |
| register Image |
| *p; |
| |
| register long |
| i; |
| |
| size_t |
| length; |
| |
| unsigned char |
| *blob; |
| |
| unsigned long |
| count, |
| scene; |
| |
| /* |
| 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); |
| status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception); |
| if (status == MagickFalse) |
| return(status); |
| (void) CloseBlob(image); |
| /* |
| Write intermediate files. |
| */ |
| coalesce_image=CoalesceImages(image,&image->exception); |
| if (coalesce_image == (Image *) NULL) |
| return(MagickFalse); |
| file=AcquireUniqueFileResource(basename); |
| if (file != -1) |
| file=close(file)-1; |
| (void) FormatMagickString(coalesce_image->filename,MaxTextExtent,"%s", |
| basename); |
| count=0; |
| write_info=CloneImageInfo(image_info); |
| for (p=coalesce_image; p != (Image *) NULL; p=GetNextImageInList(p)) |
| { |
| char |
| previous_image[MaxTextExtent]; |
| |
| 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 < (long) MagickMax((1.0*delay+1.0)/3.0,1.0); i++) |
| { |
| p->scene=count; |
| count++; |
| status=MagickFalse; |
| switch (i) |
| { |
| case 0: |
| { |
| Image |
| *frame; |
| |
| (void) FormatMagickString(p->filename,MaxTextExtent,"%s%lu.%s", |
| basename,p->scene,WriteMPEGIntermediateFormat); |
| (void) FormatMagickString(filename,MaxTextExtent,"%s%lu.%s", |
| basename,p->scene,WriteMPEGIntermediateFormat); |
| (void) FormatMagickString(previous_image,MaxTextExtent, |
| "%s%lu.%s",basename,p->scene,WriteMPEGIntermediateFormat); |
| frame=CloneImage(p,0,0,MagickTrue,&p->exception); |
| if (frame == (Image *) NULL) |
| break; |
| status=WriteImage(write_info,frame); |
| frame=DestroyImage(frame); |
| break; |
| } |
| case 1: |
| { |
| blob=(unsigned char *) FileToBlob(previous_image,~0UL,&length, |
| &image->exception); |
| } |
| default: |
| { |
| (void) FormatMagickString(filename,MaxTextExtent,"%s%lu.%s", |
| basename,p->scene,WriteMPEGIntermediateFormat); |
| if (length > 0) |
| status=BlobToFile(filename,blob,length,&image->exception); |
| break; |
| } |
| } |
| if (image->debug != MagickFalse) |
| { |
| if (status != MagickFalse) |
| (void) LogMagickEvent(CoderEvent,GetMagickModule(), |
| "%lu. Wrote %s file for scene %lu:",i,WriteMPEGIntermediateFormat, |
| p->scene); |
| else |
| (void) LogMagickEvent(CoderEvent,GetMagickModule(), |
| "%lu. Failed to write %s file for scene %lu:",i, |
| WriteMPEGIntermediateFormat,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, |
| MaxTextExtent); |
| (void) CopyMagickString(coalesce_image->filename,basename,MaxTextExtent); |
| GetPathComponent(image_info->filename,ExtensionPath,coalesce_image->magick); |
| if (*coalesce_image->magick == '\0') |
| (void) CopyMagickString(coalesce_image->magick,image->magick,MaxTextExtent); |
| status=InvokeDelegate(write_info,coalesce_image,(char *) NULL,"mpeg:encode", |
| &image->exception); |
| (void) FormatMagickString(write_info->filename,MaxTextExtent,"%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 < (long) MagickMax((1.0*delay+1.0)/3.0,1.0); i++) |
| { |
| (void) FormatMagickString(p->filename,MaxTextExtent,"%s%lu.%s", |
| basename,count++,WriteMPEGIntermediateFormat); |
| (void) RelinquishUniqueFileResource(p->filename); |
| } |
| (void) CopyMagickString(p->filename,image_info->filename,MaxTextExtent); |
| } |
| (void) RelinquishUniqueFileResource(basename); |
| coalesce_image=DestroyImageList(coalesce_image); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(CoderEvent,GetMagickModule(),"exit"); |
| return(status); |
| } |