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Full Discussion: Perl program to simulate Least Recently Loaded paging
Top Forums Shell Programming and Scripting Perl program to simulate Least Recently Loaded paging Post 302559508 by Skrynesaver on Tuesday 27th of September 2011 09:09:07 AM
Old 09-27-2011
Ahh, that's a bit more complex than the usual learning Perl question, at the risk of undoing the learning value of the exercise try the following

Code:
#!/usr/bin/perl
use strict;


# In a production system these should be validated before progessing, but for now...
print "Page access: ";
chomp(my @pa=split(/,\s+/,<STDIN>)); # assumes separated by comma and spaces as in your example
print "Frames: ";
chomp(my $frames=<STDIN>);


my @frames; # set up an array to hold an array for each frame. 
for (my$count=0;$count<$frames;$count++){ #Process the array of arrays (see perldoc perlref for details of using array references)
        for (my $index=0;$index<@pa;$index++){ #Deep copying the elements of the Page access into each frame array
                ${$frames[$count]}[$index]=$pa[$index];
        }
        @{$frames[$count]}[0 .. ($count - 1)]=split('',"-"x$count) if $count; #Set the leading irrellevant values to '-'
        for (my $index=$count;$index<@{$frames[$count]};$index+=$frames){ # go through the frame array by whatever frame size we set
                ${$frames[$count]}[$index +2 ] =${$frames[$count]}[$index+1]=$pa[$index];
        }
        #truncate the array at the size of @pa
        @{$frames[$count]}=@{$frames[$count]}[0..(@pa - 1)];
}
#Print out your results
my $count=1;
print "PA:\t",join(' ', @pa),"\n";
for my $frame_array_ref (@frames){
        print " F$count:\t",join(' ', @{$frame_array_ref}),"\n";
        $count++;
}
# I have no idea what the PF line represents, sorry

This User Gave Thanks to Skrynesaver For This Post:
guidely
 

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LEARN ABOUT DEBIAN

avisync

avisync(1)						      General Commands Manual							avisync(1)

NAME

       avisync - adjust audio synchronisation

SYNOPSIS

       avisync [ -o file -i file -q -n num -b num -a track -f commentfile ]

COPYRIGHT

       avisync is Copyright (C) by Thomas Oestreich.

DESCRIPTION

       avisync shift audio on frame basis.

OPTIONS

       -o name
	      Specify the name of the output file.

       -i file
	      Specify the name of the input file.

       -q     be less verbose.

       -n count
	      shift audio by count frames. If count is positive, audio starts with audio frame count at the beginning of the AVI-file. If count is
	      negative, audio is prepended count padding frames.

       -a track
	      Specify the number of the audio channel to shift.

       -b num Specify if avisync should write an VBR mp3 header into the AVI file. Default is 1 because it does not hurt. num is either 1 or 0.

       -f commentfile
	      Read AVI tombstone data for header comments from commentfile. See /docs/avi_comments.txt for a sample.

EXAMPLES

       The command

       avisync -i my_file1.avi -o out.avi -n -10

       puts 10 audio frames at the beginning of the AVI-file.

       E.g. if the audio is delayed about 200 ms (0.2 seconds) and you're working with a 25 frames per second AVI-File, you need to shift the
       audio 200/40 = 5 frames since one frame is 40 ms long.

AUTHORS

       avisync was written by Thomas Oestreich
       <ostreich@theorie.physik.uni-goettingen.de> with contributions from many others.  See AUTHORS for details.

SEE ALSO

       aviindex(1), avifix(1), avimerge(1), avisplit(1), tccat(1), tcdecode(1), tcdemux(1), tcextract(1), tcprobe(1), tcscan(1), transcode(1)

avisync(1)							  26th June 2003							avisync(1)
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