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=head1 NAME |
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|
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Convert::CD::TOCFile - base class to represent TOC files. |
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|
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=head1 SYNOPSIS |
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|
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use Convert::CD::TOCFile; |
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|
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# to be done |
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|
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=head1 DESCRIPTION |
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|
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A TOCFile object is used to represent file-format-specific information |
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about an image, such as image or track filenames and read/write |
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functionality for toc files. |
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|
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=head2 Convert:CD::TOCFile METHODS |
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|
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=over 4 |
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|
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=cut |
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|
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package Convert::CD::TOCFile; |
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|
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$VERSION = 0.01; |
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|
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use File::Spec; |
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use Carp; |
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|
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use Convert::CD; |
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|
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use base Convert::CD::TOCFile; |
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|
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=item Convert::CD::TOCFile->autodetect (path) |
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|
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Try to autodetect the type of image (or tocfile) identified by C<path>. Returns |
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a list of TOCFile-Classes to try. |
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|
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=cut |
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|
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sub autodetect { |
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my ($self, $path) = @_; |
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my @r; |
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|
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# shouldn't use ending... but Class->autodetect. |
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|
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#push @r, Convert::CD::Toc |
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# if $self->find_tocfile ("toc", "TOC", "Toc"); |
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|
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#push @r, Convert::CD::Ccd |
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# if $self->find_tocfile ("ccd", "CCD", "Ccd"); |
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|
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push @r, Convert::CD::Cue |
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if $self->find_tocfile ("cue", "CUE", "Cue"); |
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|
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#push @r, Convert::CD::Nrg # bad |
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# if $self->find_tocfile ("nrg", "NRG", "Nrg"); |
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|
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push @r, Convert::CD::Analyze; |
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|
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@r; |
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} |
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|
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=item new param => value... |
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|
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Create a new Convert::CD::TOCFile object. |
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|
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Parameters: |
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|
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path the base image filename |
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|
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=cut |
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|
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sub new { |
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my $class = shift; |
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my $self = bless { @_, }, $class; |
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|
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$self; |
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} |
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|
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=item $toc->find_tocfile suffixes.. |
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|
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Try to find a tocfile by probing the given suffixes. |
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|
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=cut |
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|
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sub find_tocfile { |
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my ($self, @ext) = @_; |
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|
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my $stem = $self->{path}; |
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|
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$stem =~ s/\.\S{2,4}$//; |
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|
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for (@ext) { |
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return "$stem.$_" if -f "$stem.$_"; |
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} |
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|
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(); |
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} |
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|
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=item $cd = $toc->read |
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|
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Read the TOC file, returns a new Convert::CD object. |
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|
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=item $toc->write ($cd) |
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|
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Write the TOC File using the information in the given Convert::CD object. |
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|
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=cut |
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|
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sub read { |
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my ($self) = @_; |
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|
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my $cd = new Convert::CD path => $self->{path} |
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or croak "unable to create a new Convert::CD object"; |
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|
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$self->_read ($cd); |
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|
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$cd; |
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} |
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|
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sub write { |
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my ($self, $cd) = @_; |
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|
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$self->_write ($cd); |
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} |
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|
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# abstract methods |
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sub _read { |
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my ($self, $cd) = @_; |
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|
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croak sprintf "reading %s toc files is not supported", ref $self; |
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} |
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|
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sub _write { |
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my ($self, $cd) = @_; |
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|
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croak sprintf "writing %s toc files is not supported", ref $self; |
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} |
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|
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=item $msf = Convert::CD::TOCFile->parse_msf ($string) |
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|
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Parses a time and returns it as a frame number (can be negative if the |
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string contains a leading minus). |
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|
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Returns C<undef> on error. |
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|
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=cut |
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|
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sub parse_msf { |
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$_[1] =~ /^(-?\d+):(\d+):(\d+)$/ |
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or return undef; |
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($1 * 60 + $2) * 75 + $3; |
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} |
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|
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1; |
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|
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=back |
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|
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=head1 AUTHOR |
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|
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Marc Lehmann <schmorp@schmorp.de> |
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|
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=cut |
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