/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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.
*/
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;
}
(void) close(destination_file);
(void) close(source_file);
buffer=(unsigned char *) RelinquishMagickMemory(buffer);
return(i != 0 ? MagickTrue : MagickFalse);
}
static MagickBooleanType GetPathTemplate(char *path)
{
char
*directory;
ExceptionInfo
*exception;
MagickBooleanType
status;
register char
*p;
struct stat
attributes;
(void) CopyMagickString(path,"magick-XXXXXXXX",MaxTextExtent);
exception=AcquireExceptionInfo();
directory=(char *) GetImageRegistry(StringRegistryType,"temporary-path",
exception);
exception=DestroyExceptionInfo(exception);
if (directory == (char *) NULL)
directory=GetEnvironmentValue("MAGICK_TEMPORARY_PATH");
if (directory == (char *) NULL)
directory=GetEnvironmentValue("MAGICK_TMPDIR");
if (directory == (char *) NULL)
directory=GetPolicyValue("temporary-path");
if (directory == (char *) NULL)
directory=GetEnvironmentValue("TMPDIR");
#if defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__OS2__)
if (directory == (char *) NULL)
directory=GetEnvironmentValue("TMP");
if (directory == (char *) NULL)
directory=GetEnvironmentValue("TEMP");
#endif
#if defined(__VMS)
if (directory == (char *) NULL)
directory=GetEnvironmentValue("MTMPDIR");
#endif
#if defined(P_tmpdir)
if (directory == (char *) NULL)
directory=ConstantString(P_tmpdir);
#endif
if (directory == (char *) NULL)
return(MagickTrue);
if (strlen(directory) > (MaxTextExtent-15))
{
directory=DestroyString(directory);
return(MagickTrue);
}
status=GetPathAttributes(directory,&attributes);
if ((status == MagickFalse) || !S_ISDIR(attributes.st_mode))
{
directory=DestroyString(directory);
return(MagickTrue);
}
if (directory[strlen(directory)-1] == *DirectorySeparator)
(void) FormatLocaleString(path,MaxTextExtent,"%smagick-XXXXXXXX",directory);
else
(void) FormatLocaleString(path,MaxTextExtent,"%s%smagick-XXXXXXXX",
directory,DirectorySeparator);
directory=DestroyString(directory);
if (*DirectorySeparator != '/')
for (p=path; *p != '\0'; p++)
if (*p == *DirectorySeparator)
*p='/';
return(MagickTrue);
}
MagickExport MagickBooleanType GetPathTemplate(char *path)
{
char
*directory,
*value;
ExceptionInfo
*exception;
MagickBooleanType
status;
struct stat
attributes;
(void) FormatLocaleString(path,MagickPathExtent,"magick-%.20gXXXXXXXXXXXX",
(double) getpid());
exception=AcquireExceptionInfo();
directory=(char *) GetImageRegistry(StringRegistryType,"temporary-path",
exception);
exception=DestroyExceptionInfo(exception);
if (directory == (char *) NULL)
directory=GetEnvironmentValue("MAGICK_TEMPORARY_PATH");
if (directory == (char *) NULL)
directory=GetEnvironmentValue("MAGICK_TMPDIR");
if (directory == (char *) NULL)
directory=GetEnvironmentValue("TMPDIR");
#if defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__OS2__) || defined(__CYGWIN__)
if (directory == (char *) NULL)
directory=GetEnvironmentValue("TMP");
if (directory == (char *) NULL)
directory=GetEnvironmentValue("TEMP");
#endif
#if defined(__VMS)
if (directory == (char *) NULL)
directory=GetEnvironmentValue("MTMPDIR");
#endif
#if defined(P_tmpdir)
if (directory == (char *) NULL)
directory=ConstantString(P_tmpdir);
#endif
if (directory == (char *) NULL)
return(MagickTrue);
value=GetPolicyValue("temporary-path");
if (value != (char *) NULL)
(void) CloneString(&directory,value);
if (strlen(directory) > (MagickPathExtent-25))
{
directory=DestroyString(directory);
return(MagickFalse);
}
status=GetPathAttributes(directory,&attributes);
if ((status == MagickFalse) || !S_ISDIR(attributes.st_mode))
{
directory=DestroyString(directory);
return(MagickFalse);
}
if (directory[strlen(directory)-1] == *DirectorySeparator)
(void) FormatLocaleString(path,MagickPathExtent,
"%smagick-%.20gXXXXXXXXXXXX",directory,(double) getpid());
else
(void) FormatLocaleString(path,MagickPathExtent,
"%s%smagick-%.20gXXXXXXXXXXXX",directory,DirectorySeparator,(double)
getpid());
directory=DestroyString(directory);
#if defined(MAGICKCORE_WINDOWS_SUPPORT)
{
register char
*p;
/*
Ghostscript does not like backslashes so we need to replace them. The
forward slash also works under Windows.
*/
for (p=(path[1] == *DirectorySeparator ? path+2 : path); *p != '\0'; p++)
if (*p == *DirectorySeparator)
*p='/';
}
#endif
return(MagickTrue);
}
