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#! perl |
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package Data::BiaB::MIDI; |
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BEGIN { |
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our $VERSION = 0.11; |
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} |
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use Data::BiaB; |
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BEGIN { Data::BiaB->VERSION($VERSION) } |
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=head1 NAME |
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Data::BiaB::MIDI - MIDI generator for Data::BiaB |
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=head1 SYNOPSIS |
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This module provides MIDI generation for Data::BiaB. |
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Example: |
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use Data::BiaB; |
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use Data::BiaB::MIDI; |
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# Load an existing song. |
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my $biab = Data::BiaB->new(); |
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$biab->load("Vaya_Con_Dios.mgu"); |
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# Create MIDI. |
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$biab->makemidi("Vaya_Con_Dios.midi"); |
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For convenience, you can run the module from the command line: |
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perl lib/Data/BiaB/MIDI.pm Vaya_Con_Dios.mgu |
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This will produce a MIDI file named C<__new__.midi>. |
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=cut |
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package Data::BiaB; |
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use warnings; |
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use strict; |
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use Carp qw( carp croak ); |
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my @keys = |
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( '/','C','Db','D','Eb','E','F','Gb','G','Ab','A','Bb','B', |
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'C#','D#','F#','G#','A#', |
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'Cm','Dbm','Dm','Ebm','Em','Fm','Gbm','Gm','Abm','Am','Bbm','Bm', |
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'C#m','D#m','F#m','G#m','A#m', |
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); |
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my %chords = |
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( |
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"2" => [ qw( 0 2 7 ) ], |
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"sus2" => [ qw( 0 2 7 ) ], |
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"dim" => [ qw( 0 3 6 ) ], |
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"0" => [ qw( 0 3 6 ) ], |
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"dim7" => [ qw( 0 3 6 9 ) ], |
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"m7b5" => [ qw( 0 3 6 10 ) ], |
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"ΓΈ" => [ qw( 0 3 6 10 ) ], |
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"m7b5" => [ qw( 0 3 6 10 ) ], |
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"m9b5" => [ qw( 0 3 6 11 14 ) ], |
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"m" => [ qw( 0 3 7 ) ], |
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"m#5" => [ qw( 0 3 7 ) ], |
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"m6" => [ qw( 0 3 7 9 ) ], |
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"m69" => [ qw( 0 3 7 9 14 ) ], |
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"m7" => [ qw( 0 3 7 10 ) ], |
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"m9" => [ qw( 0 3 7 10 14 ) ], |
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"m11" => [ qw( 0 3 7 10 14 17 ) ], |
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"m13" => [ qw( 0 3 7 10 14 17 21 ) ], |
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"mmaj7" => [ qw( 0 3 7 11 ) ], |
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"mM7" => [ qw( 0 3 7 11 ) ], |
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"maug" => [ qw( 0 3 8 ) ], |
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"m7#5" => [ qw( 0 3 8 10 ) ], |
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"7b5" => [ qw( 0 4 6 10 ) ], |
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"7b5b9" => [ qw( 0 4 6 10 13 ) ], |
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"9b5" => [ qw( 0 4 6 10 14 ) ], |
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"13b5" => [ qw( 0 4 6 10 14 17 21 ) ], |
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"7b5#9" => [ qw( 0 4 6 10 15 ) ], |
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"maj7#5" => [ qw( 0 4 6 11 ) ], |
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"" => [ qw( 0 4 7 ) ], |
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"maj" => [ qw( 0 4 7 ) ], |
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"6" => [ qw( 0 4 7 9 ) ], |
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"maj6" => [ qw( 0 4 7 9 ) ], |
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"maj69" => [ qw( 0 4 7 9 14 ) ], |
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"69" => [ qw( 0 4 7 9 14 ) ], |
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"7" => [ qw( 0 4 7 10 ) ], |
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"7b9" => [ qw( 0 4 7 10 13 ) ], |
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"13b9" => [ qw( 0 4 7 10 13 17 21 ) ], |
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"7b9#11" => [ qw( 0 4 7 10 13 18 ) ], |
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"9" => [ qw( 0 4 7 10 14 ) ], |
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"7#9" => [ qw( 0 4 7 10 14 ) ], |
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"11" => [ qw( 0 4 7 10 14 17 ) ], |
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"7b13" => [ qw( 0 4 7 10 14 17 20 ) ], |
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"9b13" => [ qw( 0 4 7 10 14 17 20 ) ], |
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"13" => [ qw( 0 4 7 10 14 17 21 ) ], |
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"13sus" => [ qw( 0 4 7 10 14 17 21 ) ], |
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"13+" => [ qw( 0 4 7 10 14 17 22 ) ], |
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"7#11" => [ qw( 0 4 7 10 14 18 ) ], |
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"9#11" => [ qw( 0 4 7 10 14 18 ) ], |
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"13#11" => [ qw( 0 4 7 10 14 18 21 ) ], |
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"7#9b13" => [ qw( 0 4 7 10 15 17 20 ) ], |
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"13#9" => [ qw( 0 4 7 10 15 17 21 ) ], |
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"maj7" => [ qw( 0 4 7 11 ) ], |
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"M7" => [ qw( 0 4 7 11 ) ], |
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"maj7" => [ qw( 0 4 7 11 ) ], |
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"maj9" => [ qw( 0 4 7 11 14 ) ], |
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"maj9" => [ qw( 0 4 7 11 14 ) ], |
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"maj11" => [ qw( 0 4 7 11 14 17 ) ], |
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"maj13" => [ qw( 0 4 7 11 14 17 21 ) ], |
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"maj13" => [ qw( 0 4 7 11 14 17 21 ) ], |
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"maj9#11" => [ qw( 0 4 7 11 14 18 ) ], |
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"maj13#11" => [ qw( 0 4 7 11 14 18 21 ) ], |
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"aug" => [ qw( 0 4 8 ) ], |
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"+" => [ qw( 0 4 8 ) ], |
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"aug7" => [ qw( 0 4 8 10 ) ], |
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"7#5" => [ qw( 0 4 8 10 ) ], |
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"7#5" => [ qw( 0 4 8 10 ) ], |
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"7+" => [ qw( 0 4 8 10 ) ], |
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"7#5b9" => [ qw( 0 4 8 10 13 ) ], |
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"9#5" => [ qw( 0 4 8 10 14 ) ], |
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"7#5#9" => [ qw( 0 4 8 10 15 ) ], |
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"sus" => [ qw( 0 5 7 ) ], |
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"sus4" => [ qw( 0 5 7 ) ], |
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"4" => [ qw( 0 5 7 ) ], |
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"sus7" => [ qw( 0 5 7 10 ) ], |
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"7sus" => [ qw( 0 5 7 10 ) ], |
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"7susb9" => [ qw( 0 5 7 10 13 ) ], |
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"7sus#9" => [ qw( 0 5 7 10 15 ) ], |
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"7sus#5" => [ qw( 0 5 8 10 ) ], |
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"5b" => [ qw( 0 6 ) ], |
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"5" => [ qw( 0 7 ) ], |
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); |
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my @midikeys = (split(/ /, "C G D A E B F# C# Cb Gb Db Ab Eb Bb F")); |
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my @midinotess = (split(/ /, "C C# D D# E F G G# A A# B")); |
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my @midinotesf = (split(/ /, "C Db D Eb E F G Ab A Bb B")); |
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my %midinotes; |
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sub makemidi { |
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my ( $self, $file ) = @_; |
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require MIDI; |
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use constant EV_TIME => 1; |
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use constant TICKS => 120; |
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unless ( %midinotes ) { |
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for ( my $i = 0; $i < @midinotess; $i++ ) { |
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$midinotes{$midinotess[$i]} = $i; |
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$midinotes{$midinotesf[$i]} = $i; |
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} |
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} |
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my $bpm = 4; # beats per measure |
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my $key = chordroot($self->{key_nr}); |
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warn("key=$key"); |
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my $minor = 0; |
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if ( $key =~ /^(.+)m$/ ) { |
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$minor++; |
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$key = $1; |
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} |
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$key = $midinotes{$key}; |
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warn("key=$key"); |
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$key = 14 - $key if $key > 7; |
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warn("key=$key $minor"); |
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my @pre = ( |
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[ 'set_tempo', 0, 60000000 / $self->{bpm} ], |
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[ 'time_signature', 0, $bpm, 2, 24, 8 ], |
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[ 'key_signature', 0, $key, $minor ], |
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); |
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my @ev; |
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my $time = 0; |
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my ( $onset, $chan, $pitch, $velo, $flags, $dur ); |
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$onset = $bpm*TICKS; |
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$chan = 2; |
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$velo = 40; |
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$dur = TICKS; |
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my $chord; |
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my $beats = 0; |
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my @chords; |
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# The chords consist of three parts: |
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# - the intro |
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# - the repeatable part (chorus) |
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# - the coda |
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# The starting and ending bar numbers for the chorus are known. |
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192
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my @c = @{$self->{chords}}; |
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my $start = $self->{start_chorus_bar}; |
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my $end = $self->{end_chorus_bar}; |
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# Start with the intro, if any. |
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push( @chords, @c[ 0 .. $bpm*$start-1] ) if $start > 1; |
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# Append the chorus repetitions. |
200
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0
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for ( my $r = $self->{number_of_repeats}; $r > 0; $r-- ) { |
201
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0
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push( @chords, @c[ $bpm*($start-1) .. $bpm*$end-1 ] ); |
202
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} |
203
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204
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# Append coda part, if any. |
205
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0
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0
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push( @chords, @c[ $bpm*$end .. $#c ] ) if $end < $#c; |
206
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207
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# Now turn the chords into a MIDI track. |
208
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0
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@ev = (); |
209
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0
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foreach ( @chords ) { |
210
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0
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0
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$chord = $_ if defined; # undefined -> use previous |
211
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212
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0
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0
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if ( ++$beats > $bpm ) { |
213
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# There are (always?) 4 chord slots per measure. |
214
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0
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0
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next if $beats < 4; |
215
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0
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$beats = 0; |
216
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} |
217
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218
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0
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$time += TICKS; |
219
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220
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0
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my ( $root, $name, $type ) = |
221
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$chord =~ /^\s*(\d+)\s+\d+\s+(\S+)\s+(.*)/; |
222
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0
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my @notes = @{$chords{$type}}; |
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0
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223
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0
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0
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unless ( @notes ) { |
224
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0
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warn("Unknown chord[$chord @ $time]: $name$type\n"); |
225
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0
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$onset += TICKS; |
226
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0
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next; |
227
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} |
228
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229
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warn("CHORD[$time $chord] $root $name$type (@notes)\n") |
230
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0
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0
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0
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|
if defined && $self->{debug}; |
231
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232
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# All chord notes on ... |
233
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0
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foreach ( @notes ) { |
234
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# 60 = central C. |
235
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0
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push( @ev, [ 'note_on', $onset, $chan, 60+$_+$root-1, $velo ] ); |
236
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0
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|
$onset = 0; |
237
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} |
238
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|
# ... and off a beat later. |
239
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0
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|
$onset = TICKS; |
240
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0
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|
foreach ( @notes ) { |
241
|
0
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|
push( @ev, [ 'note_off', $onset, $chan, 60+$_+$root-1, $velo ] ); |
242
|
0
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|
$onset = 0; |
243
|
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|
} |
244
|
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|
} |
245
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|
246
|
|
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|
# Add preamble and make a track. |
247
|
0
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|
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|
|
|
my $chords = MIDI::Track->new( { events => [ @pre, @ev ] } ); |
248
|
0
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|
my @tracks = ( $chords ); |
249
|
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|
250
|
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|
# Now for the melody. |
251
|
0
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|
|
|
@ev = (); |
252
|
0
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|
|
|
|
|
foreach ( @{ $self->{melody} } ) { |
|
0
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|
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|
|
253
|
0
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|
|
( $onset, $chan, $pitch, $velo, $flags, $dur ) = @$_; |
254
|
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|
255
|
|
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|
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|
|
# Skip notes we won't (cannot) handle. |
256
|
0
|
0
|
0
|
|
|
|
next unless $flags == 144 || $flags == 148 || $flags == 147; |
|
|
|
0
|
|
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|
|
257
|
0
|
0
|
0
|
|
|
|
next unless $chan && $chan < 16; |
258
|
|
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|
|
|
259
|
|
|
|
|
|
|
# Subtrackt lead in. |
260
|
0
|
|
|
|
|
|
$onset -= $bpm*TICKS; |
261
|
|
|
|
|
|
|
|
262
|
|
|
|
|
|
|
# Make MIDI. |
263
|
0
|
|
|
|
|
|
push( @ev, [ 'note_on', $onset, $chan, $pitch, $velo ] ); |
264
|
0
|
|
|
|
|
|
push( @ev, [ 'note_off', $onset+$dur, $chan, $pitch, $velo ] ); |
265
|
|
|
|
|
|
|
} |
266
|
|
|
|
|
|
|
|
267
|
0
|
0
|
|
|
|
|
unless ( @ev ) { |
268
|
0
|
|
|
|
|
|
carp("No melody?"); |
269
|
|
|
|
|
|
|
} |
270
|
|
|
|
|
|
|
else { |
271
|
|
|
|
|
|
|
# Sort on timestamp. |
272
|
0
|
|
|
|
|
|
@ev = sort { $a->[EV_TIME] <=> $b->[EV_TIME] } @ev; |
|
0
|
|
|
|
|
|
|
273
|
|
|
|
|
|
|
|
274
|
|
|
|
|
|
|
# Convert to delta times. |
275
|
0
|
|
|
|
|
|
$time = 0; |
276
|
0
|
|
|
|
|
|
foreach my $e ( @ev ) { |
277
|
0
|
0
|
|
|
|
|
carp("NEGATIVE DELTA \@ $time: @{[$e->[EV_TIME]-$time]}\n") |
|
0
|
|
|
|
|
|
|
278
|
|
|
|
|
|
|
if $e->[EV_TIME] < $time; |
279
|
|
|
|
|
|
|
# Make time relative. |
280
|
0
|
|
|
|
|
|
($time, $e->[EV_TIME]) = ($e->[EV_TIME], $e->[EV_TIME]-$time); |
281
|
|
|
|
|
|
|
} |
282
|
|
|
|
|
|
|
|
283
|
|
|
|
|
|
|
# Create a MIDI track and add it to the tracks. |
284
|
0
|
|
|
|
|
|
my $melody = MIDI::Track->new( { events => [ @pre, @ev ] } ); |
285
|
0
|
|
|
|
|
|
push( @tracks, $melody ); |
286
|
|
|
|
|
|
|
} |
287
|
|
|
|
|
|
|
|
288
|
|
|
|
|
|
|
# Create the MIDI Opus. |
289
|
0
|
|
|
|
|
|
my $op = MIDI::Opus->new |
290
|
|
|
|
|
|
|
( { format => 1, |
291
|
|
|
|
|
|
|
ticks => TICKS, |
292
|
|
|
|
|
|
|
tracks => \@tracks, |
293
|
|
|
|
|
|
|
} ); |
294
|
|
|
|
|
|
|
|
295
|
|
|
|
|
|
|
# And save. |
296
|
0
|
|
0
|
|
|
|
$op->write_to_file( $file || '__new__.midi' ); |
297
|
|
|
|
|
|
|
} |
298
|
|
|
|
|
|
|
|
299
|
|
|
|
|
|
|
|
300
|
|
|
|
|
|
|
1; # End of Data::BiaB |
301
|
|
|
|
|
|
|
|
302
|
|
|
|
|
|
|
package main; |
303
|
|
|
|
|
|
|
|
304
|
|
|
|
|
|
|
unless ( caller ) { |
305
|
1
|
|
|
1
|
|
9
|
use Data::BiaB; |
|
1
|
|
|
|
|
2
|
|
|
1
|
|
|
|
|
115
|
|
306
|
|
|
|
|
|
|
my $b = Data::BiaB->new( debug => 1 )->load (shift )->parse; |
307
|
|
|
|
|
|
|
$b->makechords; |
308
|
|
|
|
|
|
|
$b->makemidi; |
309
|
|
|
|
|
|
|
} |
310
|
|
|
|
|
|
|
|
311
|
|
|
|
|
|
|
=head1 AUTHOR |
312
|
|
|
|
|
|
|
|
313
|
|
|
|
|
|
|
Johan Vromans, C<< >> |
314
|
|
|
|
|
|
|
|
315
|
|
|
|
|
|
|
=head1 BUGS AND SUPPORT |
316
|
|
|
|
|
|
|
|
317
|
|
|
|
|
|
|
See L. |
318
|
|
|
|
|
|
|
|
319
|
|
|
|
|
|
|
=head1 COPYRIGHT & LICENSE |
320
|
|
|
|
|
|
|
|
321
|
|
|
|
|
|
|
Copyright 2016 Johan Vromans, all rights reserved. |
322
|
|
|
|
|
|
|
|
323
|
|
|
|
|
|
|
This program is free software; you can redistribute it and/or modify |
324
|
|
|
|
|
|
|
it under the same terms as Perl itself. |
325
|
|
|
|
|
|
|
|
326
|
|
|
|
|
|
|
=cut |
327
|
|
|
|
|
|
|
|
328
|
|
|
|
|
|
|
1; |