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fiasco(3)	       Fractal Image And Sequence COdec		     fiasco(3)

NAME
       fiasco_decoder_new,  fiasco_decoder_delete, fiasco_decoder_write_frame,
       fiasco_decoder_get_frame,		    fiasco_decoder_get_length,
       fiasco_decoder_get_rate,			     fiasco_decoder_get_width,
       fiasco_decoder_get_height		     fiasco_decoder_get_title,
       fiasco_decoder_get_comment   fiasco_decoder_is_color   -	 decompress  a
       FIASCO file

SYNOPSIS
       #include <fiasco.h>

       fiasco_decoder_t *
       fiasco_decoder_new (const char * fiasco_name,
			   const fiasco_d_options_t * options);

       void
       fiasco_decoder_delete (fiasco_decoder_t * decoder);

       int
       fiasco_decoder_write_frame (fiasco_decoder_t * decoder,
				   const char * image_name);

       fiasco_image_t *
       fiasco_decoder_get_frame (fiasco_decoder_t * decoder);

       unsigned
       fiasco_decoder_get_length (fiasco_decoder_t * decoder);

       unsigned
       fiasco_decoder_get_rate (fiasco_decoder_t * decoder);

       unsigned
       fiasco_decoder_get_width (fiasco_decoder_t * decoder);

       unsigned
       fiasco_decoder_get_height (fiasco_decoder_t * decoder);

       const char *
       fiasco_decoder_get_title (fiasco_decoder_t * decoder);

       const char *
       fiasco_decoder_get_comment (fiasco_decoder_t * decoder);

       int
       fiasco_decoder_is_color (fiasco_decoder_t * decoder);

DESCRIPTION
       The fiasco_decoder_new()	 function  initializes	the  decompression  of
       FIASCO  file  fiasco_name.  Several  decompression  parameters  can  be
       adjusted by the class options (see fiasco_d_options_new(3)).

       The individual frames of a FIASCO video can be decompressed by  calling
       successively    either	 function    fiasco_decoder_write_frame()   or
       fiasco_decoder_get_frame().

       The  function  fiasco_decoder_write_frame()  decompresses  the  current
       frame  and  writes  it  in  raw	pgm(5)	or  ppm(5)  format to the file
       image_name. If image_name=- or a NULL pointer then the  image  file  is
       produced	 on  the standard output. If image_name is a relative path and
       the environment variable FIASCO_IMAGES is a (colon-separated)  list  of
       directories,  then  the	output file is written to the first (writable)
       directory of this list. Otherwise, the current  directory  is  used  to
       store the file.

       The  function fiasco_decoder_get_frame() decompresses the current frame
       and returns the computed image object.  Use  the	 function  fiasco_ren‐
       derer_new(3) to create a renderer object that converts the FIASCO image
       to the desired format.

       After   all   frames   have    been    decompressed,    the    function
       fiasco_decoder_delete() should be called to close the input file and to
       free temporarily allocated memory.

       Number of available frames, frame rate and frames geometry, type of the
       FIASCO	  file	   are	  accessible	through	   member    functions
       fiasco_decoder_get_length(),		    fiasco_decoder_get_rate(),
       fiasco_decoder_get_width(),	 fiasco_decoder_get_height(),	   and
       fiasco_decoder_is_color().	Use	   fiasco_decoder_get_title(),
       fiasco_decoder_get_comment()  to	 read title and comment strings of the
       FIASCO file.

ARGUMENTS
       fiasco_name
	      Filename of the FIASCO input file.  If  fiasco_name  is  a  NULL
	      pointer  or  "-"	then the decoder reads from standard input. If
	      the file is not found in the current directory and the  environ‐
	      ment  variable FIASCO_DATA is a (colon-separated) list of direc‐
	      tories, then the input file is searched for  in  these  directo‐
	      ries, too.

       options
	      This "class" encapsulates the various coding and decoding param‐
	      eters.   Use   the   functions	fiasco_d_options_new(3)	   and
	      fiasco_d_options_delete(3)  to  create  and  delete an object of
	      this class. Several member functions  (see  fiasco_d_options(3))
	      are available to change the default values.

       decoder
	      The  decoder "class" encapsulates the FIASCO decoder. It is used
	      to store the internal state of the decoder.

RETURN VALUES
       The function fiasco_decoder_new() returns a pointer to the newly	 allo‐
       cated  decoder  object. If an error has been catched, a NULL pointer is
       returned.

       The function fiasco_decoder_write_frame() returns 1  if	the  file  has
       been successfully written. Otherwise, the function returns 0.

       The  function fiasco_decoder_get_frame() returns a pointer to the newly
       allocated FIASCO image object. If an error has  been  catched,  a  NULL
       pointer is returned.

       The  function  fiasco_decoder_get_length() returns the number of frames
       of the FIASCO file. If an error has been catched, 0 is returned.

       The function fiasco_decoder_get_rate() returns the framerate (number of
       frames  per second) of the FIASCO file. If an error has been catched, 0
       is returned.

       The  function  fiasco_decoder_get_width()  returns  the	width  of  the
       decoded	frames	of the FIASCO file. If an error has been catched, 0 is
       returned.

       The function fiasco_decoder_get_height()	 returns  the  height  of  the
       decoded	frames	of the FIASCO file. If an error has been catched, 0 is
       returned.

       The function fiasco_decoder_get_title() returns an  optional  title  of
       the FIASCO file. If an error has been catched, 0 is returned.

       The  function  fiasco_decoder_get_comment() returns an optional comment
       of the FIASCO file. If an error has been catched, 0 is returned.

       The function fiasco_decoder_is_color() returns 0 if the decoded	frames
       are grayscale images, otherwise a non-zero value is returned.

       In  case	 of  an	 error in one of the above functions, use the function
       fiasco_get_error_message(3) to get a string describing the  last	 error
       message of FIASCO.

ENVIRONMENT
       FIASCO_IMAGES
	      Search path for image files. Default is "./".
       FIASCO_DATA
	      Search and save path for FIASCO files. Default is "./".

SEE ALSO
       fiasco_d_options_new(3), fiasco_d_options_delete(3),
       fiasco_d_options(3), fiasco_get_error_message(3)

       Ullrich	Hafner,	 Juergen  Albert,  Stefan  Frank,  and	Michael Unger.
       Weighted	 Finite	 Automata  for	Video  Compression,  IEEE  Journal  on
       Selected Areas In Communications, January 1998
       Ullrich	Hafner.	 Low  Bit-Rate	Image  and  Video Coding with Weighted
       Finite  Automata,  Ph.D.	  thesis,   Mensch   &	 Buch	Verlag,	  ISBN
       3-89820-002-7, October 1999.

AUTHOR
       Ullrich Hafner <hafner@bigfoot.de>

FIASCO				  April, 2000			     fiasco(3)
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