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@ -2,11 +2,12 @@ package Subtitle::SRT;
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use strict; |
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use warnings; |
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use feature qw(switch); |
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use utf8; |
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sub new { |
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my ($class) = @_; |
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my $self = { events => [] }; |
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my $self = { events => [], debug => 0, log => [] }; |
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return bless($self, $class); |
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} |
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@ -18,4 +19,110 @@ sub load {
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return $cnt; |
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} |
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sub trim { |
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my ($self, $line) = @_; |
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return unless $line; |
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return $line =~ s/(^\s+|\s+$)//or; |
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} |
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sub log { |
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my ($self, $level, $msg) = @_; |
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given ($level) { |
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when ("error") { push @{ $self->{log} }, "E: $msg"; } |
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when ("warn") { push @{ $self->{log} }, "W: $msg"; } |
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when ("info") { push @{ $self->{log} }, "I: $msg"; } |
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when ("debug") { push @{ $self->{log} }, "D: $msg" if $self->{debug}; } |
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default { warn "Unknown loglevel $level of $msg\n"; } |
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} |
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return 1; |
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} |
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sub parse_timing { |
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my ($self, $str) = @_; |
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... |
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} |
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sub new_event { return +{ id => undef, timing => undef, text => undef }; } |
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sub parse { |
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my ($self, $lines) = @_; |
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my $expected = 'id'; |
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my $linenum = 0; |
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my $event; |
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foreach my $line (@$lines) { |
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$linenum++; |
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unless ($line and $event) { |
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$self->log(debug => "empty line and event"); |
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next; |
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} |
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# expected: event id |
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if ($line and not defined $event) { |
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$event = $self->new_event; |
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$event->{id} = $self->trim($line); |
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$self->log(debug => "new event with id: $event->{id}"); |
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} |
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# expected: timing |
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if ($event and not $event->{timing}) { |
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my $timing = []; |
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my ($start, $end, $rest) = ($line =~ m/(\S+)\s*-->\s*(\S+)(.*)/o); |
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unless ($start and $end) { |
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$self->log(warn => "expected timing but found `$line` at $linenum, skipped"); |
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next; |
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} |
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unless ($timing->[0] = $self->parse_timing($start)) { |
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$self->log(warn => "Can't parse timing at line $linenum: $start"); |
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next; |
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} |
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unless ($timing->[1] = $self->parse_timing($end)) { |
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$self->log(warn => "Can't parse timing at line $linenum: $end"); |
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next; |
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} |
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$event->{timing} = $timing; |
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next unless $rest; |
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# extension: timing |
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# example: X1:050 X2:669 Y1:234 Y2:436 |
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if ($rest =~ m/([XY][12]:(\d+))/io) { |
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foreach my $token (split(/\s+/, $rest)) { |
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$event->{coords} //= {}; |
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if ($token =~ m/([XY][12]):(\d+)/io) { |
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$event->{coords}->{lc($1)} = $2; |
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next; |
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} |
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$self->log(warn => "Garbage detected instead event coord: $token"); |
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} |
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unless (scalar @{ $event->{coords}} == 4) { |
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delete $event->{coords}; |
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$self->log(warn => "Incomplete coord set for event at line $linenum"); |
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} |
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next; |
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} |
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# extension: ssa-like style |
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# example: SSA: Dialogue, Layer: 0, Style: Reply, Name: NTP, MarginL: 0300, MarginR: 0000, MarginV: 0300, Effect: !Effect |
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... |
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} |
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# expected: event text |
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if ($event and $event->{timing}) { |
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if ($event->{text}) { |
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$event->{text} .= " " . $self->trim($line); |
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} else { |
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$event->{text} = $self->trim($line); |
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} |
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next; |
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} |
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# expected: empty line |
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if ($event and not $line) { |
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$self->log(debug => "finalize event line $linenum"); |
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push @{ $self->{events} }, $event; |
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undef $event; |
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next; |
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} |
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die("unhandled line: $linenum:$line\n"); |
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} |
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return scalar @{ $self->{events} }; |
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} |
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1; |
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