Annotation of mp3/bin/mixer.pl, Revision 1.5
1.1 andrew 1: #!/usr/bin/perl -Tw
1.5 ! andrew 2: # $AFresh1: mixer.pl,v 1.4 2011/06/14 17:04:58 andrew Exp $
1.1 andrew 3: ########################################################################
4: # Mixer.pl *** Changes volume on the MP3 player
5: #
6: # 10/11/2002 4:26PM
7: # Written by andrew fresh <andrew@mad-techies.org>
8: ########################################################################
9: use strict;
1.4 andrew 10: use warnings;
1.1 andrew 11:
12: my $mixerctl = '/usr/bin/mixerctl';
13:
14: my $me = MyName();
15:
16: delete $ENV{PATH} if exists $ENV{PATH};
17:
1.4 andrew 18: my $paused_file = '/var/www/mp3/playlist/paused';
1.1 andrew 19:
20: my @Vols = (
1.5 ! andrew 21: 7, 15, 23, 31, 39, 47, 55, 63, 71, 79, 87, 95,
! 22: 103, 111, 119, 127, 135, 143, 151, 159, 167, 175, 183, 191,
! 23: 199, 207, 215, 223, 231, 239, 247, 255,
! 24: );
1.1 andrew 25:
1.5 ! andrew 26: my $Cur_Vol = `$mixerctl outputs.master`;
1.1 andrew 27:
28: #»print "Cur_Vol $Cur_Vol<BR>\n";
29: $Cur_Vol =~ /outputs.master=(\d+),(\d+)/i;
1.5 ! andrew 30: $Cur_Vol = ( $1 + $2 ) / 2;
1.1 andrew 31:
1.4 andrew 32: my $pause_action = 'pause';
1.5 ! andrew 33: if ( -e $paused_file ) {
1.4 andrew 34: $pause_action = 'play';
35: }
1.1 andrew 36: print "Content-Type: text/html\n\n";
37: print "<html>\n<head>\n\t<meta HTTP-EQUIV='Pragma' CONTENT='no-cache'> ";
38:
1.5 ! andrew 39: my ( $prefix, $action ) = split /\&/, $ENV{'QUERY_STRING'};
1.4 andrew 40: $prefix ||= '';
41: if ($action) {
42: $prefix =~ s/%(..)/pack("c",hex($1))/ge if $prefix;
43: $action =~ s/%(..)/pack("c",hex($1))/ge;
44:
1.5 ! andrew 45: print "<meta HTTP-EQUIV=Refresh CONTENT=\"1; URL=mixer.pl?"
! 46: . EncodeURL($prefix) . "\">";
1.3 andrew 47:
1.5 ! andrew 48: if ( $action eq 'pause' ) { $pause_action = Pause($pause_action) }
! 49: elsif ( $action =~ /^(\d+)$/ ) { $Cur_Vol = Set_Vol( $Cur_Vol, $1 ); }
1.3 andrew 50:
1.1 andrew 51: }
52:
53: print <<EOL;
54:
55: <style type="text/css" media="screen">
56: <!--
57: a.down:link { color: red; text-decoration: none; }
58: a.down:visited { color: red; text-decoration: none; }
59: a.down:hover { color: red; text-decoration: none; }
60: a.down:active { color: red; text-decoration: none; }
61: a.up:link { color: blue; text-decoration: none; }
62: a.up:visited { color: blue; text-decoration: none; }
63: a.up:hover { color: blue; text-decoration: none; }
64: a.up:active { color: blue; text-decoration: none; }
65: -->
66: </style>
67:
68: EOL
69:
70: print "<title>Volume Mixer</title></head>\n<body>\n\n";
71:
72: Print_Nav();
73:
1.3 andrew 74: unless ($prefix) {
1.1 andrew 75:
1.5 ! andrew 76: my @nav;
! 77: push @nav,
! 78: "<B><A HREF='$me?"
! 79: . EncodeURL($prefix) . '&'
! 80: . "pause' class='pause'>$pause_action</A></B>\n";
! 81: push @nav, " - Volume: ";
! 82:
! 83: foreach my $vol (@Vols) {
! 84: my ( $char, $class ) = ( $vol, 'up' );
! 85:
! 86: if ( $vol > $Cur_Vol ) { ( $char, $class ) = ( '}', 'up' ); }
! 87: elsif ( $vol < $Cur_Vol ) { ( $char, $class ) = ( ']', 'down' ); }
! 88:
! 89: push @nav,
! 90: "<B><A HREF='$me?"
! 91: . EncodeURL($prefix) . '&'
! 92: . "$vol' class='$class'>$char</A></B>\n";
1.1 andrew 93:
1.5 ! andrew 94: }
! 95: print join " ", @nav;
1.4 andrew 96:
1.5 ! andrew 97: #print "<br>\n";
1.3 andrew 98: }
1.1 andrew 99:
100: print "</body>\n</head>\n</html>\n";
101:
1.5 ! andrew 102: sub Set_Vol {
! 103: my ( $old, $new ) = @_;
1.1 andrew 104:
1.5 ! andrew 105: my $Set_Vol;
! 106: foreach my $vol ( $old < $new ? $old .. $new : reverse $new .. $old ) {
! 107: $Set_Vol = `$mixerctl -w outputs.master=$vol,$vol`;
! 108: }
! 109: return $new;
1.4 andrew 110: }
111:
112: sub Pause {
113: my ($action) = @_;
114:
1.5 ! andrew 115: if ( $action eq 'play' ) {
1.4 andrew 116: unlink $paused_file;
117: return 'pause';
118: }
119: else {
120: open my $fh, '>', $paused_file or die;
121: print $fh time;
122: close $fh;
123: return 'play';
124: }
1.1 andrew 125: }
126:
127: ########################################################################
128: # *** EncodeURL: %encodes the parameters of the URL
129: sub EncodeURL {
1.5 ! andrew 130: my $strURL = shift || '';
! 131: $strURL =~ s/(\W)/sprintf("%%%x", ord($1))/eg;
! 132: return $strURL;
1.1 andrew 133: }
134:
135: #########################################################################
136: # My name
137: sub MyName {
1.5 ! andrew 138: my @filename = ( split /\//, $0 );
! 139: pop @filename;
1.1 andrew 140: }
141:
142: #######################################################################
143: # Bail: this subrouting dies and displays the error to the browser.
1.5 ! andrew 144: # gotten from the example in the O'Reilly
1.1 andrew 145: # _Learning_Perl_on_Win32_Systems_
1.5 ! andrew 146: sub bail {
! 147: my $error = shift;
! 148: print "\n\nUnexpected Error: <b>$error</b><br>\n";
! 149: print "In " . __FILE__ . "\n";
! 150: die;
! 151: exit;
! 152: }
! 153:
! 154: sub Print_Nav {
! 155: open FILE, 'nav.inc' or die "\n\ncouldn't open FILE nav.inc: $!";
! 156: while (<FILE>) {
! 157: s/%PREFIX%/$prefix/g;
! 158: print;
! 159: }
! 160: close FILE;
1.1 andrew 161: }
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