#!/usr/local/bin/perl
#
# Kleine Krankheit written by LynX@noIsy.pAges.dE
# .. rand() makes my perl interpreter segfault every now and then.. *shrug*
#
# 19990417 trying to improve -r

if ($#ARGV >= 0) {
	require 'getopt.pl';
	&Getopt;
	# $flags = shift if $ARGV[0] =~ /^\-/;
	# $DEBUG = $flags =~ /d/;
	$DEBUG = $opt_d;
} else {
	$opt_M = 1;
}

# if ($flags =~ /h/) { print <<X; exit; }
if ($opt_h) { print <<X; exit; }
# makenoise - ultimate music steering gadget
#
# Flags:
#	-M	sort by mark and randomizer		<-- best algorhythm
#	-m	sort by mark only
#	-R	sort by rand and mark
#	-r	random shuffle
#	-S	sort by size (biggest songs first)
#	-s	sort by size (smallest songs first)
#	-f	use order given by command line and filesystem
#	-F	shuffle the order given by command line slightly
#				<-- best algorhythm if you don't have marks
#	-N	sort by file name with slight shuffle
#		default is to sort by file names
#
#	-d	debug
#	-c	cache /cdrom files into /tmp
#	-x	exec mpg123 -@ after creating playlist
#	-e	edit playlist before starting (TBD)
#
# Format of .makenoiserc:
#  <path>/<filename> [<opts>]		<volume_in_%>	<mark>
X

if ($ENV{HOSTTYPE} =~ /linux/) {
	$tracker='tracker2 -tolerant -oversample 4';
	$mp2play='mpg123 --remain --aggressive'; # -b 19999';	# -b 777
	$mp3play=$mp2play;
	$wavplay='wavplay';
	# $mp3play='echo "n" | l3dec';
	# $mp3play='mp3play-old';
	$setvol = \&camsetvol;
	# $auplay='play -v';
} else {
	$tracker='tracker -tolerant -oversample 4';
	$mp2play='mpg123 --remain --aggressive';
	$mp3play='xaudio -port=line -port=headphone';
	$wavplay='wavplay';

	# klappt nich:
	# $setvol= $ENV{'HOSTTYPE'} eq 'solaris' ? 'audioplay -Vv' : 'play -v';
	# system "$setvol $vol[$i] sounds/fx/st_com.au" || die $!;
}
$defdir='/MASTER/media';
$defdir='/usr/local/media' unless -d $defdir;

# $tmpdir='/T/mp3';
$tmpdir='/fat/windows/temp';
$tmpdir='/tmp' unless -d $tmpdir and -w _;
$tmplock="$tmpdir/.makenoise-copylock";
$tmplist="$tmpdir/.makenoise-list";

sub docache {
	my $path = shift;
	return $path =~ m!^/cdrom!;
}

# END OF CONFIG AREA

# nlink suxx on almost every architecture
$File::Find::dont_use_nlink = 'DONT!';

# enable realtime output
$| = 1;

$rcfile='.makenoiserc';
$FILETYPES = "(wav|au|mp\\d|sea|mod|gz|lha|Z|lzh|zip|s3m)";
# |med|mmd0)";

if (open(I, "$ENV{HOME}/.words/sea")) {
	my $WORD;

	# enable sea support
	chomp ($WORD = <I>);
	close I;

	# system "rm -f $dtmp $rtmp $ptmp";
	$decode = "des -d -k $WORD";
}

if (defined &docache) {
	$PWD = `pwd`;
	chomp $PWD;
	$cacherel = &docache($PWD);
}

print <<X;

makenoise 3.0 (profiling, recursion, decryption)
by the symbolic LynX

known filetypes: $FILETYPES

X

@index = ();
system "rm -f $tmplock $tmpdir/Cache#* $tmpdir/Decoded#*";

sub wanted {
	# ($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_);

	if (-f $_ && -r _ && -s _ > 9999 && /.\.$FILETYPES$/io ) {
		$file[++$i] = $name;
		$size[$i] = -s _;
		&progress('yes: ', $name);
	} elsif ( -d _ && -e "$_/.prune" ) {
		$prune = 1;
		&progress('pruned: ', $name);
		print "\n";
	} elsif ( $decode && -f _ && /\bindex\.etx$/i ) {
		open(I, "$decode <$_ |")
		  and @index = (@index, <I>) and close I;
		&progress('inf: ', $name);
	} else {
		&progress('no : ', $name) if -f _;
	}
}

if ($#ARGV >= 0) {
	if ($#ARGV == 0 && -T $ARGV[0]) {
		$rcfile = $ARGV[0];
	} else {
		$i = 0;
		for $_ (@ARGV) {
			if (-d $_ && -x _ && -r _) {
				require 'finddepth.pl';
#print "\n[finddepth: $_]\n" if $DEBUG;
				&finddepth($_);
				next;	# $_ is corrupted after finddepth
			}
			$name = $_;
#print "\n[file wanted: $_]\n" if $DEBUG;
			&wanted;
		}
		&progress($i, ' songs found');
		print "\n";
		exit unless $i;
		goto START;
	}
}

if (! -r $rcfile) {	# if no rc file here
	chdir;		# then check out $HOME
			# go to the defdir if there's none here aswell
	chdir $defdir if ! -r $rcfile;
}
open(RC, $rcfile) || die "Cannot find $rcfile";
$i=1; while(<RC>) {
	next if /^#/;	# skip comments
			# parse the 3 basic strings
	#ext if ! /^([^\t]+)\t+(\d+)\t(\d+)\t?(\d?) ?(\d?)/o;
	/^([^\t]+)\t+(\d+)\t(\d+)\t?(\d?) ?(\d?)/ or next;

	($file[$i],$vol[$i],$mark[$i],$mix[$i],$repeat[$i]) = ($1,$2,$3,$4,$5);

			# extract options from $file
	($file[$i],$opts[$i]) = ($1,$2)
		if $file[$i] =~ /^(\S+) (.*)$/;

	$size[$i] = -s $file[$i];
#print "$i ($size[$i]) $file[$i] $opts[$i] $vol[$i] $mark[$i] $mix[$i]\n";
	$i++ if $size[$i] > 150;
}
$i--;

print "Information for $i songs loaded from $rcfile\n";

START:

			# setup the randomizer to some (in)sane value
#$a = time() ^ $$; srand($a);
$a = time() ^ $$; $a = reverse $a; srand($a);
#print "srand($a)\n";

# many ways to sort the songs
#
sub by_name { $file[$a] cmp $file[$b]; }
sub by_rand { rand(10) < 5; }
#
# works only with .makenoiserc
sub by_mark { $mark[$a] <=> $mark[$b] || $file[$a] cmp $file[$b]; }
#
# let the randomizer have some influence on the order implied
# by the marks. this is the coolest sort mode available.
sub by_mark_and_rand {
	($mark[$a]-$mark[$b] < 1) && ($mark[$a]-$mark[$b] > -1) ?
		&by_rand : &by_mark; 
}
# less useful, since shuffle is too dominant
sub by_rand_and_mark {
	($mark[$a]-$mark[$b] < 4) && ($mark[$a]-$mark[$b] > -1) ?
		&by_rand : &by_mark; 
}
# gives an order by name a slight shuffle
sub by_name_and_rand { rand(9) > 3 ? &by_name : &by_rand; }
#
# coolest mode if you have not prepared any marks. this will
# take the order you give on the command line and shuffle it
# just a little bit to avoid it sounding the same each time
# still if you care to hear something mostly first, you will
sub by_number_and_rand { rand(9) > 3 ? $a <=> $b : &by_rand; }
#
# longest or shortest songs first.. this is an interesting
# approach to listening to music, it either brings the most
# epic or most silly pieces together..    :-)
sub by_size { $size[$a] <=> $size[$b]; }

# weird perl bug makes this loop necessary...
do {
	# $_ = $flags;
	@order = sort by_mark_and_rand 1 .. $i if $opt_M;
	@order = sort by_name_and_rand 1 .. $i if $opt_N;
	@order = sort by_rand_and_mark 1 .. $i if $opt_R;
	@order = sort by_mark 1 .. $i if $opt_m;
 	@order = sort by_size 1 .. $i if $opt_s;
 	@order = reverse sort by_size 1 .. $i if $opt_S;
	@order = 1 .. $i if $opt_f;			# "by filesystem"
 	@order = sort by_number_and_rand 1 .. $i if $opt_F;

	# this gives lousy results:
 	#	@order = sort by_rand 1 .. $i if $opt_r;
	if ($opt_r) {
		my @tmp = 1 .. $i;
		@order = ();
		my $lr = -99;
		for $j (1 .. $i) {
			my $r = int(rand($#tmp));
			my $ir = $tmp[$r];

			# this tries to avoid items being too near
			# even if randomizer suggests so -
			# in particular try not to play the same artist
			# in a row, that's why we look at the filename
			if ($#tmp>7 and abs($lr-$ir)<23 and
			   substr($file[$lr],0,12) eq substr($file[$ir],0,12)) {

				print STDERR <<X if $DEBUG;
last=$lr\t[$file[$lr]]
near=$ir\t[$file[$ir]] ($r)
X
				$r = int(rand($#tmp));
				$ir = $tmp[$r];
				if (substr($file[$lr],0,9) eq
				    substr($file[$ir],0,9)) {
					print STDERR <<X if $DEBUG;
\t\t(one retry)
X
					$r = int(rand($#tmp));
					$ir = $tmp[$r];
				}
				print STDERR <<X if $DEBUG;
new =$ir\t[$file[$ir]] ($r)

X
			}
			$lr = splice @tmp, $r, 1;
			push @order, $lr;
		}
	}
	@order = sort by_name 1 .. $i unless @order;
	print "\r[order] @order\n" if $DEBUG;

	# another weird bug!!
	foreach $j (@order) {
		undef @order unless $j;
	}
} until (@order && $order[0]);

# $_ = $flags;
$docache = $opt_c;
$doexec = $opt_x;

$SIG{INT} = \&sigINT;	# handle ctrl-c
print "\n";

if ($doexec or not fork) {
	if (open(L, ">$tmplist")) {
		print "\rSaving playlist into $tmplist\n\n";
		my $j;
		foreach $j (@order) {
			#rintf STDERR "%4d: %d %s\n", $j, $mark[$j], $file[$j];
			print L $file[$j], "\n";
		}
		close L;
		exec "mpg123 --remain --aggressive -@ $tmplist" if $doexec;
		exit;
	}
}

for ($I=0; $I <= $#order; $I++) {
	$i = $order[$I];
	$f = $file[$i];

	#next unless -r $f;
#print "\r[checked existence of $f]\n" if $DEBUG;
	&prepare($f, 0) if $I == 0;

print "\r[$rtmp to become $rtmp2]\n" if $DEBUG and $rtmp2;
	$rtmp = $rtmp2 if $rtmp2;
	$ptmp = $ptmp2 if $ptmp2;

	if ($I < $#order) {
		&prepare($file[$order[$I+1]], 1);
	} else {
		&status('Thank you for flying makenoise');
	}
			# seperate into path and filename
	if ($f =~ m!(.*/)([^/]+)$!o) {
		($path,$file) = ($1,$2);
	} else {
		$path = '';
		$file = $f;
	}
			# show size (sort-of song collection debugging)
	$size = $size[$i];
	$size = -s $f unless $size;
print "\r[checked size]\n" if $DEBUG;

	$repeat = $repeat[$i] ? $repeat[$i] : 1;
	print "* $i:\t$size ", $mark[$i] ? "($mark[$i])" : '', $repeat[$i], " ";
	&$setvol($vol[$i]) if defined &$setvol;
			# is it a sample?
	$ext = "\L$1\E" if $file =~ /\.(\w+)$/o;

#print "\r[is '$rtmp' there?]\n" if $DEBUG;
	if ($rtmp and -r $rtmp) {
		$cooked = 1;
		rename($rtmp, $ptmp);
print "\r[renamed tmp file]\n" if $DEBUG;
		$f = $ptmp;
		$ext = "\L$1\E" if $ptmp =~ /\.(\w+)$/o;
	} else {
		$cooked = 0;
	}

	$f =~ s:`:\\`:g;
print "\r[ext is $ext]\n" if $DEBUG;
	if ($ext eq "au") {						## uLAW
		print "$path$file \n";
		#system("$auplay $vol[$i] $f");
		system("cat".(" $f" x $repeat).">/dev/audio");
	} elsif ($ext eq "mp3" || $file =~ /\.mp3\.wav$/i) {		## MP3
		# no $repeat support here
		print $mp3play !~ /mpg123/ ? "$path$file \n" : "\n";
		$o = $vol[$i] ? "-volume=$vol[$i]" : '';
print "\r[launching mp3 player]\n" if $DEBUG;
		system("$mp3play $o \"$f\"");
print "\r[done $mp3play]\n" if $DEBUG;
		# l3dec: system("$mp3play $f 2>/dev/null");
	} elsif ($ext eq "sea") {					## SEA
		# gets called only when ^c is hit too fast
		#print "$path$file skipped..\n";
		$o = $vol[$i] ? "-volume=$vol[$i]" : '';
		#sleep 1 until -r $rtmp;
		sleep 3 unless -r $rtmp;
		rename($rtmp, $ptmp);
		system("$mp3play $o \"$ptmp\"");
		unlink $rtmp, $ptmp;
	# } elsif ($file =~ /\.mp\d/) {
	} elsif ($ext =~ /mp\d/) {					## MP2
		# no $repeat support here
		print $mp2play !~ /mpg123/ ? "$path$file \n" : "\n";
		$o = $vol[$i] ? "-g=$vol[$i]" : '';
		system("$mp2play $o \"$f\"");
	} elsif ($ext eq "wav") {					## WAV
		print "$path$file ...\n";
		system("$wavplay \"$f\"");
	} else {
	    # if ($ext =~ /^(mod|gz|lha|Z|lzh|zip|s3m|med|mmd0)$/o) {	## MOD
		print $path;
		print "$path$file \n" if $tracker !~ /tracker/;
			# fix up the options to the tracker
		$o = $vol[$i] ? "-g=$vol[$i]" : '';
		$o = "-mix ".($mix[$i] ? $mix[$i] : "5")."0";
		$o .= " $opts[$i]" if $opts[$i];
		system("$tracker $o".(" $f" x $repeat));
	}
	unlink $ptmp if $ptmp and -r $ptmp;
#print "\r[removed $ptmp]\n" if $DEBUG;
}

sub insea {
	my $s = shift;
	my @info = grep( /^$1\s/, @index ) if $s =~ m!([^/]+?)\.sea$!i;
print "\r[info] ", @info if $DEBUG;
	my $t;
	my ($radix, $sz, $long)
	 = ( @info[0] =~ /^(\S+)\s+(\d+)\s+(\S.*\S)\s*$/ );

	if ( $long =~ /\b(\w+\.\w+)\s*$/ ) {
		$t = $1;
	} else {
		$t = $s;
		$t =~ s/\.sea$/\.mp3/i;
		$t =~ y!/!_!;
	}
	$rtmp2 = "$tmpdir/Decoded#Wait# $t";
	$ptmp2 = "$tmpdir/Decoded# $t";

	&status('(decoding next: ', $long ? $long : $t, ')');
}
sub desea {
	my $s = shift;
	system("$decode <'$s' >'$rtmp2'");
	print STDERR <<X;
\r(done decoding $s)
X
}

sub progress {
	my $tx = join('', @_);
	my $len = length $tx;
	print STDERR $tx, ' ', '=' x (77-$len), "\r" if $len < 77;
	print STDERR "\n" if $DEBUG;
}

sub status {
	my $tx = join('', @_);
#	print STDERR # $ENV{TERM} =~ /xt/ ? "\033]0;$tx\007" :
#		"\033\067\033[H \033[7m $tx \033[m\033\068";
	my $t = 78 - length($tx);
	$t = 0 if $t < 0;
	print STDERR "\r", '-' x $t, ' ', $tx, "\n";
}

sub camsetvol {
	local($v, $nv) = @_;
	return unless $v;

	$nv = $v / 4;
	$nv = int($nv) + 10;

	$nv = 20 if $nv > 20;
	print " ($v -> $nv) ";
	system "cam -v $nv,$nv";
}

sub softcopy {
	my ($from, $to) = @_;
	open(I, $from) or print STDERR "\rsoftcopy from $from: $!\n";
	open(O, ">$to") or print STDERR  "\rsoftcopy to $to: $!\n";
	if ($forked) {
		setpriority 0,0,19;
		sleep 1;
	}
	print "\r[copying]\n" if $DEBUG;

	my $c=0, $d=0, $limit = -33333;
	while (<I>) {
		# we should only do this when we're copying from cdrom while
		# the foreground music is also on cdrom..
		#
		if ($forked) {			# was: unless cooked
			$c -= length $_;
			if ($c < $limit) {
				sleep 1;
				$d++ if $d < 7;
				$c= -$c * $d;	# okay its weird, but its fun
print "\r[softcopy factor $d for $c bytes]\n" if $DEBUG;
			}
		}
		print O;
	}
	close I; close O;
}

sub touch {
	my $fn = shift;
	open (O, ">$fn") or die "$fn: $!";
	print O "makenoise $$ woz'ere";
	close O;
}

sub sigINT {
	exit unless $forked;
	if ($intcount++ == 0) {			# one more chance!
		$SIG{INT} = \&sigINT;		# re-handle ctrl-c
		return;
	}
	&unlock;
	exit;
}

sub lock {
	print "\r[forked]\n" if $DEBUG;
	sleep 4;	# let the music start
	sleep 2 while -r $tmplock;
	$forked = 1;	# activate interrupt handler
	&touch($tmplock);
}

sub unlock {
	unlink $tmplock;
	# print "\r[unlocked]\n" if $DEBUG;
}

sub prepare {
	my $f = my $f2 = shift;
	my $dofork = shift;
	my $t = $f;
	$t = $1 if $f =~ m!/([^/]+)$!;

	# return unless -r $f;
	if ($f =~ /\.sea$/i) {
		&insea($f);			# set up nice names
		unless ($dofork and fork) {
			&lock if $dofork;
			&desea($f);		# decrypt next song
			return unless $dofork;
			&unlock;
			exit;			# enough parallel work
		}
#print "\r[rtmp2 is $rtmp2]\n" if $DEBUG;
	} elsif ($docache and defined &docache) {
		if (-l $f) {
			$f = readlink $f;
			# print "link points to $f!\n";
		}
		# $t and ..
		if ( ($cacherel and $f !~ m!^/!) or &docache($f) ) {
			$rtmp2 = "$tmpdir/Cache:Wait: $t";
			$ptmp2 = "$tmpdir/Cache: $t";

			if (0) {
				&lock; # if $dofork;
				system("( sleep 3;" .
					" nice -n 19 cp '$f' '$rtmp2';" .
					" echo '\r(ready: $f2)';" .
					" rm $tmplock )&");
				# incorrect but better then no locking
				#&unlock;
			}# else {
			unless ($dofork and fork) {
				&lock if $dofork;
				#system("nice cp '$f' '$rtmp2'");
				&softcopy($f, $rtmp2);
				print "\r(", ($intcount or not $dofork) ?
					'this' : 'next', ": $f2)\n";
				return unless $dofork;
				&unlock;
				# &status('(next: ', $t, ')') if $t;
				# &status('(ready)') if $t;
				exit;
			}
		} # else {
		&status('(next: ', $t, ')') if $t;
		# }
	}
}

1;