David Robillard
bed7bacdd1
git-svn-id: svn://localhost/ardour2/branches/midi@1729 d708f5d6-7413-0410-9779-e7cbd77b26cf
121 lines
2.3 KiB
Perl
121 lines
2.3 KiB
Perl
package ARDOUR::SessionSRHandler;
|
|
|
|
|
|
use XML::Handler::XMLWriter;
|
|
use POSIX qw(floor);
|
|
|
|
@ISA = qw( XML::Handler::XMLWriter );
|
|
|
|
$VERSION = 0.1;
|
|
|
|
# This table maps the "names of XML elements" to lists of "names of attributes" which should
|
|
# be converted according to the SR change.
|
|
# TODO: The table is a bit dirty, i have to figure out how to do it cleanly
|
|
my $conversion_table = {
|
|
"Location" => { "end" => 0, "start" => 0 },
|
|
"Region" => { "length" => 0, "start" => 0, "position" => 0, "sync-position" => 0 },
|
|
"Crossfade" => { "left" => 0, "right" => 0 }
|
|
};
|
|
|
|
|
|
sub new {
|
|
my ($type, $original_sr, $new_sr, $output) = @_;
|
|
|
|
#my $self = XML::Handler::XMLWriter->new( { Output => $output } );
|
|
|
|
my $self = $type->SUPER::new( Output => $output );
|
|
|
|
$self->{Debug} = 0;
|
|
$self->{Ratio} = ($new_sr+0)/($original_sr+0);
|
|
$self->{OriginalSR} = $original_sr;
|
|
$self->{TargetSR} = $new_sr;
|
|
$self->{Output} = $output;
|
|
|
|
$self->{InEvents} = 0;
|
|
|
|
return $self;
|
|
}
|
|
|
|
sub start_element {
|
|
my $self = shift;
|
|
my $element = shift;
|
|
|
|
my $debug = $self->{Debug};
|
|
|
|
my $atts = $element->{Attributes};
|
|
|
|
my $convert_attributes = $conversion_table->{$element->{Name}};
|
|
|
|
foreach my $cAtt (keys %$convert_attributes) {
|
|
$atts->{$cAtt} = sprintf("%.0f", $atts->{$cAtt} * $self->{Ratio});
|
|
$debug = 0;
|
|
}
|
|
|
|
if ($debug eq 0) {
|
|
$self->SUPER::start_element($element, @_);
|
|
}
|
|
|
|
if ($element->{Name} eq "events") {
|
|
$self->{InEvents} = 1;
|
|
}
|
|
}
|
|
|
|
sub end_element {
|
|
my $self = shift;
|
|
my $element = shift;
|
|
|
|
if ($self->{Debug} eq 0) {
|
|
$self->SUPER::end_element($element,@_);
|
|
}
|
|
|
|
if ($element->{Name} eq "events") {
|
|
$self->{InEvents} = 0;
|
|
}
|
|
}
|
|
|
|
sub start_document {
|
|
my $self = shift;
|
|
|
|
$self->SUPER::start_document(@_);
|
|
|
|
$self->{Output}->print("<!-- Sample rate converted from $self->{OriginalSR}hz to $self->{TargetSR}hz -->\n");
|
|
}
|
|
|
|
sub end_document {
|
|
my $self = shift;
|
|
|
|
$self->SUPER::end_document(@_);
|
|
}
|
|
|
|
sub characters {
|
|
my $self = shift;
|
|
my $c = shift;
|
|
|
|
if ($self->{InEvents} > 0) {
|
|
my $converted = "";
|
|
|
|
foreach my $foo (split(' ',$c->{Data})) {
|
|
if ($self->{InEvents} eq 1) {
|
|
$converted .= floor($foo * $self->{Ratio})." ";
|
|
$self->{InEvents} = 2;
|
|
} else {
|
|
$converted .= $foo." ";
|
|
$self->{InEvents} = 1;
|
|
}
|
|
}
|
|
|
|
$c->{Data} = $converted;
|
|
}
|
|
|
|
|
|
if ($self->{Debug} eq 0) {
|
|
$self->SUPER::characters($c, @_);
|
|
}
|
|
|
|
}
|
|
|
|
1;
|
|
|
|
|
|
|