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re-indented to look normal ;-)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5582 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Daniel Stenberg 2005-01-17 14:26:36 +00:00
parent 7396d99027
commit e24a528499

View file

@ -885,226 +885,226 @@ data (if TAGVERSION argument is C<0>, may contain two versions).
=cut
sub get_mp3tag {
my($file, $ver, $raw_v2) = @_;
my($tag, $v1, $v2, $v2h, %info, @array, $fh);
$raw_v2 ||= 0;
$ver = !$ver ? 0 : ($ver == 2 || $ver == 1) ? $ver : 0;
my($file, $ver, $raw_v2) = @_;
my($tag, $v1, $v2, $v2h, %info, @array, $fh);
$raw_v2 ||= 0;
$ver = !$ver ? 0 : ($ver == 2 || $ver == 1) ? $ver : 0;
if (not (defined $file && $file ne '')) {
$@ = "No file specified";
return undef;
}
if (not (defined $file && $file ne '')) {
$@ = "No file specified";
return undef;
}
if (not -s $file) {
$@ = "File is empty";
return undef;
}
if (not -s $file) {
$@ = "File is empty";
return undef;
}
if (ref $file) { # filehandle passed
$fh = $file;
} else {
$fh = gensym;
if (not open $fh, "< $file\0") {
$@ = "Can't open $file: $!";
return undef;
}
}
if (ref $file) { # filehandle passed
$fh = $file;
} else {
$fh = gensym;
if (not open $fh, "< $file\0") {
$@ = "Can't open $file: $!";
return undef;
}
}
binmode $fh;
binmode $fh;
if ($ver < 2) {
seek $fh, -128, 2;
while(defined(my $line = <$fh>)) { $tag .= $line }
if ($ver < 2) {
seek $fh, -128, 2;
while(defined(my $line = <$fh>)) { $tag .= $line }
if ($tag =~ /^TAG/) {
$v1 = 1;
if (substr($tag, -3, 2) =~ /\000[^\000]/) {
(undef, @info{@v1_tag_names}) =
(unpack('a3a30a30a30a4a28', $tag),
ord(substr($tag, -2, 1)),
$mp3_genres[ord(substr $tag, -1)]);
$info{TAGVERSION} = 'ID3v1.1';
} else {
(undef, @info{@v1_tag_names[0..4, 6]}) =
(unpack('a3a30a30a30a4a30', $tag),
$mp3_genres[ord(substr $tag, -1)]);
$info{TAGVERSION} = 'ID3v1';
}
if ($UNICODE) {
for my $key (keys %info) {
next unless $info{$key};
my $u = Unicode::String::latin1($info{$key});
$info{$key} = $u->utf8;
}
}
} elsif ($ver == 1) {
_close($file, $fh);
$@ = "No ID3v1 tag found";
return undef;
}
}
if ($tag =~ /^TAG/) {
$v1 = 1;
if (substr($tag, -3, 2) =~ /\000[^\000]/) {
(undef, @info{@v1_tag_names}) =
(unpack('a3a30a30a30a4a28', $tag),
ord(substr($tag, -2, 1)),
$mp3_genres[ord(substr $tag, -1)]);
$info{TAGVERSION} = 'ID3v1.1';
} else {
(undef, @info{@v1_tag_names[0..4, 6]}) =
(unpack('a3a30a30a30a4a30', $tag),
$mp3_genres[ord(substr $tag, -1)]);
$info{TAGVERSION} = 'ID3v1';
}
if ($UNICODE) {
for my $key (keys %info) {
next unless $info{$key};
my $u = Unicode::String::latin1($info{$key});
$info{$key} = $u->utf8;
}
}
} elsif ($ver == 1) {
_close($file, $fh);
$@ = "No ID3v1 tag found";
return undef;
}
}
($v2, $v2h) = _get_v2tag($fh);
($v2, $v2h) = _get_v2tag($fh);
unless ($v1 || $v2) {
_close($file, $fh);
$@ = "No ID3 tag found";
return undef;
}
unless ($v1 || $v2) {
_close($file, $fh);
$@ = "No ID3 tag found";
return undef;
}
if (($ver == 0 || $ver == 2) && $v2) {
if ($raw_v2 == 1 && $ver == 2) {
%info = %$v2;
$info{TAGVERSION} = $v2h->{version};
} else {
my $hash = $raw_v2 == 2 ? { map { ($_, $_) } keys %v2_tag_names } : \%v2_to_v1_names;
for my $id (keys %$hash) {
if (exists $v2->{$id}) {
if ($id =~ /^TCON?$/ && $v2->{$id} =~ /^.?\((\d+)\)/) {
$info{$hash->{$id}} = $mp3_genres[$1];
} else {
my $data1 = $v2->{$id};
if (($ver == 0 || $ver == 2) && $v2) {
if ($raw_v2 == 1 && $ver == 2) {
%info = %$v2;
$info{TAGVERSION} = $v2h->{version};
} else {
my $hash = $raw_v2 == 2 ? { map { ($_, $_) } keys %v2_tag_names } : \%v2_to_v1_names;
for my $id (keys %$hash) {
if (exists $v2->{$id}) {
if ($id =~ /^TCON?$/ && $v2->{$id} =~ /^.?\((\d+)\)/) {
$info{$hash->{$id}} = $mp3_genres[$1];
} else {
my $data1 = $v2->{$id};
# this is tricky ... if this is an arrayref,
# we want to only return one, so we pick the
# first one. but if it is a comment, we pick
# the first one where the first charcter after
# the language is NULL and not an additional
# sub-comment, because that is most likely to be
# the user-supplied comment
if (ref $data1 && !$raw_v2) {
if ($id =~ /^COMM?$/) {
my($newdata) = grep /^(....\000)/, @{$data1};
$data1 = $newdata || $data1->[0];
} else {
$data1 = $data1->[0];
}
}
# this is tricky ... if this is an arrayref, we want
# to only return one, so we pick the first one. but
# if it is a comment, we pick the first one where the
# first charcter after the language is NULL and not an
# additional sub-comment, because that is most likely
# to be the user-supplied comment
$data1 = [ $data1 ] if ! ref $data1;
if (ref $data1 && !$raw_v2) {
if ($id =~ /^COMM?$/) {
my($newdata) = grep /^(....\000)/, @{$data1};
$data1 = $newdata || $data1->[0];
} else {
$data1 = $data1->[0];
}
}
for my $data (@$data1) {
$data =~ s/^(.)//; # strip first char (text encoding)
my $encoding = $1;
my $desc;
if ($id =~ /^COM[M ]?$/) {
$data =~ s/^(?:...)//; # strip language
$data =~ s/^(.*?)\000+//; # strip up to first NULL(s),
# for sub-comment
$desc = $1;
}
$data1 = [ $data1 ] if ! ref $data1;
if ($UNICODE) {
if ($encoding eq "\001" || $encoding eq "\002") { # UTF-16, UTF-16BE
my $u = Unicode::String::utf16($data);
$data = $u->utf8;
$data =~ s/^\xEF\xBB\xBF//; # strip BOM
} elsif ($encoding eq "\000") {
my $u = Unicode::String::latin1($data);
$data = $u->utf8;
}
}
for my $data (@$data1) {
$data =~ s/^(.)//; # strip first char (text encoding)
my $encoding = $1;
my $desc;
if ($id =~ /^COM[M ]?$/) {
$data =~ s/^(?:...)//; # strip language
$data =~ s/^(.*?)\000+//; # strip up to first NULL(s),
# for sub-comment
$desc = $1;
}
if ($UNICODE) {
if ($encoding eq "\001" || $encoding eq "\002") { # UTF-16, UTF-16BE
my $u = Unicode::String::utf16($data);
$data = $u->utf8;
$data =~ s/^\xEF\xBB\xBF//; # strip BOM
} elsif ($encoding eq "\000") {
my $u = Unicode::String::latin1($data);
$data = $u->utf8;
}
}
if ($raw_v2 == 2 && $desc) {
$data = { $desc => $data };
}
if ($raw_v2 == 2 && exists $info{$hash->{$id}}) {
if (ref $info{$hash->{$id}} eq 'ARRAY') {
push @{$info{$hash->{$id}}}, $data;
} else {
$info{$hash->{$id}} = [ $info{$hash->{$id}}, $data ];
}
} else {
$info{$hash->{$id}} = $data;
}
}
}
}
}
if ($ver == 0 && $info{TAGVERSION}) {
$info{TAGVERSION} .= ' / ' . $v2h->{version};
} else {
$info{TAGVERSION} = $v2h->{version};
}
}
}
if ($raw_v2 == 2 && $desc) {
$data = { $desc => $data };
}
unless ($raw_v2 && $ver == 2) {
foreach my $key (keys %info) {
if (defined $info{$key}) {
$info{$key} =~ s/\000+.*//g;
$info{$key} =~ s/\s+$//;
}
}
for (@v1_tag_names) {
$info{$_} = '' unless defined $info{$_};
}
}
if ($raw_v2 == 2 && exists $info{$hash->{$id}}) {
if (ref $info{$hash->{$id}} eq 'ARRAY') {
push @{$info{$hash->{$id}}}, $data;
} else {
$info{$hash->{$id}} = [ $info{$hash->{$id}}, $data ];
}
} else {
$info{$hash->{$id}} = $data;
}
}
}
}
}
if ($ver == 0 && $info{TAGVERSION}) {
$info{TAGVERSION} .= ' / ' . $v2h->{version};
} else {
$info{TAGVERSION} = $v2h->{version};
}
}
}
if (keys %info && exists $info{GENRE} && ! defined $info{GENRE}) {
$info{GENRE} = '';
}
unless ($raw_v2 && $ver == 2) {
foreach my $key (keys %info) {
if (defined $info{$key}) {
$info{$key} =~ s/\000+.*//g;
$info{$key} =~ s/\s+$//;
}
}
_close($file, $fh);
for (@v1_tag_names) {
$info{$_} = '' unless defined $info{$_};
}
}
if (keys %info && exists $info{GENRE} && ! defined $info{GENRE}) {
$info{GENRE} = '';
}
_close($file, $fh);
return keys %info ? {%info} : undef;
return keys %info ? {%info} : undef;
}
sub _get_v2tag {
my($fh) = @_;
my($off, $myseek, $myseek_22, $myseek_23, $v2, $h, $hlen, $num);
$h = {};
my($fh) = @_;
my($off, $myseek, $myseek_22, $myseek_23, $v2, $h, $hlen, $num);
$h = {};
$v2 = _get_v2head($fh) or return;
if ($v2->{major_version} < 2) {
warn "This is $v2->{version}; " .
"ID3v2 versions older than ID3v2.2.0 not supported\n"
if $^W;
return;
}
$v2 = _get_v2head($fh) or return;
if ($v2->{major_version} < 2) {
warn "This is $v2->{version}; " .
"ID3v2 versions older than ID3v2.2.0 not supported\n"
if $^W;
return;
}
if ($v2->{major_version} == 2) {
$hlen = 6;
$num = 3;
} else {
$hlen = 10;
$num = 4;
}
if ($v2->{major_version} == 2) {
$hlen = 6;
$num = 3;
} else {
$hlen = 10;
$num = 4;
}
$myseek = sub {
seek $fh, $off, 0;
read $fh, my($bytes), $hlen;
return unless $bytes =~ /^([A-Z0-9]{$num})/
|| ($num == 4 && $bytes =~ /^(COM )/); # stupid iTunes
my($id, $size) = ($1, $hlen);
my @bytes = reverse unpack "C$num", substr($bytes, $num, $num);
for my $i (0 .. ($num - 1)) {
$size += $bytes[$i] * 256 ** $i;
}
return($id, $size);
};
$myseek = sub {
seek $fh, $off, 0;
read $fh, my($bytes), $hlen;
return unless $bytes =~ /^([A-Z0-9]{$num})/
|| ($num == 4 && $bytes =~ /^(COM )/); # stupid iTunes
my($id, $size) = ($1, $hlen);
my @bytes = reverse unpack "C$num", substr($bytes, $num, $num);
for my $i (0 .. ($num - 1)) {
$size += $bytes[$i] * 256 ** $i;
}
return($id, $size);
};
$off = $v2->{ext_header_size} + 10;
$off = $v2->{ext_header_size} + 10;
while ($off < $v2->{tag_size}) {
my($id, $size) = &$myseek or last;
seek $fh, $off + $hlen, 0;
read $fh, my($bytes), $size - $hlen;
if (exists $h->{$id}) {
if (ref $h->{$id} eq 'ARRAY') {
push @{$h->{$id}}, $bytes;
} else {
$h->{$id} = [$h->{$id}, $bytes];
}
} else {
$h->{$id} = $bytes;
}
$off += $size;
}
while ($off < $v2->{tag_size}) {
my($id, $size) = &$myseek or last;
seek $fh, $off + $hlen, 0;
read $fh, my($bytes), $size - $hlen;
if (exists $h->{$id}) {
if (ref $h->{$id} eq 'ARRAY') {
push @{$h->{$id}}, $bytes;
} else {
$h->{$id} = [$h->{$id}, $bytes];
}
} else {
$h->{$id} = $bytes;
}
$off += $size;
}
return($h, $v2);
return($h, $v2);
}
@ -1143,292 +1143,292 @@ On error, returns nothing and sets C<$@>.
=cut
sub get_mp3info {
my($file) = @_;
my($off, $myseek, $byte, $eof, $h, $tot, $fh);
my($file) = @_;
my($off, $myseek, $byte, $eof, $h, $tot, $fh);
if (not (defined $file && $file ne '')) {
$@ = "No file specified";
return undef;
}
if (not (defined $file && $file ne '')) {
$@ = "No file specified";
return undef;
}
if (not -s $file) {
$@ = "File is empty";
return undef;
}
if (not -s $file) {
$@ = "File is empty";
return undef;
}
if (ref $file) { # filehandle passed
$fh = $file;
} else {
$fh = gensym;
if (not open $fh, "< $file\0") {
$@ = "Can't open $file: $!";
return undef;
}
}
if (ref $file) { # filehandle passed
$fh = $file;
} else {
$fh = gensym;
if (not open $fh, "< $file\0") {
$@ = "Can't open $file: $!";
return undef;
}
}
$off = 0;
$tot = 4096;
$off = 0;
$tot = 4096;
$myseek = sub {
seek $fh, $off, 0;
read $fh, $byte, 4;
};
$myseek = sub {
seek $fh, $off, 0;
read $fh, $byte, 4;
};
binmode $fh;
&$myseek;
binmode $fh;
&$myseek;
if ($off == 0) {
if (my $id3v2 = _get_v2head($fh)) {
$tot += $off += $id3v2->{tag_size};
&$myseek;
}
}
if ($off == 0) {
if (my $id3v2 = _get_v2head($fh)) {
$tot += $off += $id3v2->{tag_size};
&$myseek;
}
}
$h = _get_head($byte);
until (_is_mp3($h)) {
$off++;
&$myseek;
$h = _get_head($byte);
if ($off > $tot && !$try_harder) {
_close($file, $fh);
$@ = "Couldn't find MP3 header (perhaps set " .
'$MP3::Info::try_harder and retry)';
return undef;
}
}
$h = _get_head($byte);
until (_is_mp3($h)) {
$off++;
&$myseek;
$h = _get_head($byte);
if ($off > $tot && !$try_harder) {
_close($file, $fh);
$@ = "Couldn't find MP3 header (perhaps set " .
'$MP3::Info::try_harder and retry)';
return undef;
}
}
my $vbr = _get_vbr($fh, $h, \$off);
my $vbr = _get_vbr($fh, $h, \$off);
seek $fh, 0, 2;
$eof = tell $fh;
seek $fh, -128, 2;
$off += 128 if <$fh> =~ /^TAG/ ? 1 : 0;
seek $fh, 0, 2;
$eof = tell $fh;
seek $fh, -128, 2;
$off += 128 if <$fh> =~ /^TAG/ ? 1 : 0;
_close($file, $fh);
_close($file, $fh);
$h->{size} = $eof - $off;
$h->{size} = $eof - $off;
return _get_info($h, $vbr);
return _get_info($h, $vbr);
}
sub _get_info {
my($h, $vbr) = @_;
my $i;
my($h, $vbr) = @_;
my $i;
$i->{VERSION} = $h->{IDR} == 2 ? 2 : $h->{IDR} == 3 ? 1 :
$h->{IDR} == 0 ? 2.5 : 0;
$i->{LAYER} = 4 - $h->{layer};
$i->{VBR} = defined $vbr ? 1 : 0;
$i->{VERSION} = $h->{IDR} == 2 ? 2 : $h->{IDR} == 3 ? 1 :
$h->{IDR} == 0 ? 2.5 : 0;
$i->{LAYER} = 4 - $h->{layer};
$i->{VBR} = defined $vbr ? 1 : 0;
$i->{COPYRIGHT} = $h->{copyright} ? 1 : 0;
$i->{PADDING} = $h->{padding_bit} ? 1 : 0;
$i->{STEREO} = $h->{mode} == 3 ? 0 : 1;
$i->{MODE} = $h->{mode};
$i->{COPYRIGHT} = $h->{copyright} ? 1 : 0;
$i->{PADDING} = $h->{padding_bit} ? 1 : 0;
$i->{STEREO} = $h->{mode} == 3 ? 0 : 1;
$i->{MODE} = $h->{mode};
$i->{SIZE} = $vbr && $vbr->{bytes} ? $vbr->{bytes} : $h->{size};
$i->{SIZE} = $vbr && $vbr->{bytes} ? $vbr->{bytes} : $h->{size};
my $mfs = $h->{fs} / ($h->{ID} ? 144000 : 72000);
$i->{FRAMES} = int($vbr && $vbr->{frames}
? $vbr->{frames}
: $i->{SIZE} / $h->{bitrate} / $mfs
);
my $mfs = $h->{fs} / ($h->{ID} ? 144000 : 72000);
$i->{FRAMES} = int($vbr && $vbr->{frames}
? $vbr->{frames}
: $i->{SIZE} / $h->{bitrate} / $mfs
);
if ($vbr) {
$i->{VBR_SCALE} = $vbr->{scale} if $vbr->{scale};
$h->{bitrate} = $i->{SIZE} / $i->{FRAMES} * $mfs;
if (not $h->{bitrate}) {
$@ = "Couldn't determine VBR bitrate";
return undef;
}
}
if ($vbr) {
$i->{VBR_SCALE} = $vbr->{scale} if $vbr->{scale};
$h->{bitrate} = $i->{SIZE} / $i->{FRAMES} * $mfs;
if (not $h->{bitrate}) {
$@ = "Couldn't determine VBR bitrate";
return undef;
}
}
$h->{'length'} = ($i->{SIZE} * 8) / $h->{bitrate} / 10;
$i->{SECS} = $h->{'length'} / 100;
$i->{MM} = int $i->{SECS} / 60;
$i->{SS} = int $i->{SECS} % 60;
$i->{MS} = (($i->{SECS} - ($i->{MM} * 60) - $i->{SS}) * 1000);
$h->{'length'} = ($i->{SIZE} * 8) / $h->{bitrate} / 10;
$i->{SECS} = $h->{'length'} / 100;
$i->{MM} = int $i->{SECS} / 60;
$i->{SS} = int $i->{SECS} % 60;
$i->{MS} = (($i->{SECS} - ($i->{MM} * 60) - $i->{SS}) * 1000);
# $i->{LF} = ($i->{MS} / 1000) * ($i->{FRAMES} / $i->{SECS});
# int($i->{MS} / 100 * 75); # is this right?
$i->{TIME} = sprintf "%.2d:%.2d", @{$i}{'MM', 'SS'};
$i->{TIME} = sprintf "%.2d:%.2d", @{$i}{'MM', 'SS'};
$i->{BITRATE} = int $h->{bitrate};
$i->{BITRATE} = int $h->{bitrate};
# should we just return if ! FRAMES?
$i->{FRAME_LENGTH} = int($h->{size} / $i->{FRAMES}) if $i->{FRAMES};
$i->{FREQUENCY} = $frequency_tbl[3 * $h->{IDR} + $h->{sampling_freq}];
$i->{FRAME_LENGTH} = int($h->{size} / $i->{FRAMES}) if $i->{FRAMES};
$i->{FREQUENCY} = $frequency_tbl[3 * $h->{IDR} + $h->{sampling_freq}];
return $i;
return $i;
}
sub _get_head {
my($byte) = @_;
my($bytes, $h);
my($byte) = @_;
my($bytes, $h);
$bytes = _unpack_head($byte);
@$h{qw(IDR ID layer protection_bit
bitrate_index sampling_freq padding_bit private_bit
mode mode_extension copyright original
emphasis version_index bytes)} = (
$bytes = _unpack_head($byte);
@$h{qw(IDR ID layer protection_bit
bitrate_index sampling_freq padding_bit private_bit
mode mode_extension copyright original
emphasis version_index bytes)} = (
($bytes>>19)&3, ($bytes>>19)&1, ($bytes>>17)&3, ($bytes>>16)&1,
($bytes>>12)&15, ($bytes>>10)&3, ($bytes>>9)&1, ($bytes>>8)&1,
($bytes>>6)&3, ($bytes>>4)&3, ($bytes>>3)&1, ($bytes>>2)&1,
$bytes&3, ($bytes>>19)&3, $bytes
);
$h->{bitrate} = $t_bitrate[$h->{ID}][3 - $h->{layer}][$h->{bitrate_index}];
$h->{fs} = $t_sampling_freq[$h->{IDR}][$h->{sampling_freq}];
$h->{bitrate} = $t_bitrate[$h->{ID}][3 - $h->{layer}][$h->{bitrate_index}];
$h->{fs} = $t_sampling_freq[$h->{IDR}][$h->{sampling_freq}];
return $h;
return $h;
}
sub _is_mp3 {
my $h = $_[0] or return undef;
return ! ( # all below must be false
$h->{bitrate_index} == 0
||
$h->{version_index} == 1
||
my $h = $_[0] or return undef;
return ! ( # all below must be false
$h->{bitrate_index} == 0
||
$h->{version_index} == 1
||
($h->{bytes} & 0xFFE00000) != 0xFFE00000
||
||
!$h->{fs}
||
||
!$h->{bitrate}
||
$h->{bitrate_index} == 15
||
||
$h->{bitrate_index} == 15
||
!$h->{layer}
||
$h->{sampling_freq} == 3
||
$h->{emphasis} == 2
||
||
$h->{sampling_freq} == 3
||
$h->{emphasis} == 2
||
!$h->{bitrate_index}
||
||
($h->{bytes} & 0xFFFF0000) == 0xFFFE0000
||
||
($h->{ID} == 1 && $h->{layer} == 3 && $h->{protection_bit} == 1)
||
||
($h->{mode_extension} != 0 && $h->{mode} != 1)
);
);
}
sub _get_vbr {
my($fh, $h, $roff) = @_;
my($off, $bytes, @bytes, $myseek, %vbr);
my($fh, $h, $roff) = @_;
my($off, $bytes, @bytes, $myseek, %vbr);
$off = $$roff;
@_ = (); # closure confused if we don't do this
$off = $$roff;
@_ = (); # closure confused if we don't do this
$myseek = sub {
my $n = $_[0] || 4;
seek $fh, $off, 0;
read $fh, $bytes, $n;
$off += $n;
};
$myseek = sub {
my $n = $_[0] || 4;
seek $fh, $off, 0;
read $fh, $bytes, $n;
$off += $n;
};
$off += 4;
$off += 4;
if ($h->{ID}) { # MPEG1
$off += $h->{mode} == 3 ? 17 : 32;
} else { # MPEG2
$off += $h->{mode} == 3 ? 9 : 17;
}
if ($h->{ID}) { # MPEG1
$off += $h->{mode} == 3 ? 17 : 32;
} else { # MPEG2
$off += $h->{mode} == 3 ? 9 : 17;
}
&$myseek;
return unless $bytes eq 'Xing';
&$myseek;
return unless $bytes eq 'Xing';
&$myseek;
$vbr{flags} = _unpack_head($bytes);
&$myseek;
$vbr{flags} = _unpack_head($bytes);
if ($vbr{flags} & 1) {
&$myseek;
$vbr{frames} = _unpack_head($bytes);
}
if ($vbr{flags} & 1) {
&$myseek;
$vbr{frames} = _unpack_head($bytes);
}
if ($vbr{flags} & 2) {
&$myseek;
$vbr{bytes} = _unpack_head($bytes);
}
if ($vbr{flags} & 2) {
&$myseek;
$vbr{bytes} = _unpack_head($bytes);
}
if ($vbr{flags} & 4) {
$myseek->(100);
if ($vbr{flags} & 4) {
$myseek->(100);
# Not used right now ...
# $vbr{toc} = _unpack_head($bytes);
}
}
if ($vbr{flags} & 8) { # (quality ind., 0=best 100=worst)
&$myseek;
$vbr{scale} = _unpack_head($bytes);
} else {
$vbr{scale} = -1;
}
if ($vbr{flags} & 8) { # (quality ind., 0=best 100=worst)
&$myseek;
$vbr{scale} = _unpack_head($bytes);
} else {
$vbr{scale} = -1;
}
$$roff = $off;
return \%vbr;
$$roff = $off;
return \%vbr;
}
sub _get_v2head {
my $fh = $_[0] or return;
my($h, $bytes, @bytes);
my $fh = $_[0] or return;
my($h, $bytes, @bytes);
# check first three bytes for 'ID3'
seek $fh, 0, 0;
read $fh, $bytes, 3;
return unless $bytes eq 'ID3';
# check first three bytes for 'ID3'
seek $fh, 0, 0;
read $fh, $bytes, 3;
return unless $bytes eq 'ID3';
# get version
read $fh, $bytes, 2;
$h->{version} = sprintf "ID3v2.%d.%d",
@$h{qw[major_version minor_version]} =
unpack 'c2', $bytes;
# get version
read $fh, $bytes, 2;
$h->{version} = sprintf "ID3v2.%d.%d",
@$h{qw[major_version minor_version]} =
unpack 'c2', $bytes;
# get flags
read $fh, $bytes, 1;
if ($h->{major_version} == 2) {
@$h{qw[unsync compression]} =
(unpack 'b8', $bytes)[7, 6];
$h->{ext_header} = 0;
$h->{experimental} = 0;
} else {
@$h{qw[unsync ext_header experimental]} =
(unpack 'b8', $bytes)[7, 6, 5];
}
# get flags
read $fh, $bytes, 1;
if ($h->{major_version} == 2) {
@$h{qw[unsync compression]} =
(unpack 'b8', $bytes)[7, 6];
$h->{ext_header} = 0;
$h->{experimental} = 0;
} else {
@$h{qw[unsync ext_header experimental]} =
(unpack 'b8', $bytes)[7, 6, 5];
}
# get ID3v2 tag length from bytes 7-10
$h->{tag_size} = 10; # include ID3v2 header size
read $fh, $bytes, 4;
@bytes = reverse unpack 'C4', $bytes;
foreach my $i (0 .. 3) {
# whoaaaaaa nellllllyyyyyy!
$h->{tag_size} += $bytes[$i] * 128 ** $i;
}
# get ID3v2 tag length from bytes 7-10
$h->{tag_size} = 10; # include ID3v2 header size
read $fh, $bytes, 4;
@bytes = reverse unpack 'C4', $bytes;
foreach my $i (0 .. 3) {
# whoaaaaaa nellllllyyyyyy!
$h->{tag_size} += $bytes[$i] * 128 ** $i;
}
# get extended header size
$h->{ext_header_size} = 0;
if ($h->{ext_header}) {
$h->{ext_header_size} += 10;
read $fh, $bytes, 4;
@bytes = reverse unpack 'C4', $bytes;
for my $i (0..3) {
$h->{ext_header_size} += $bytes[$i] * 256 ** $i;
}
}
# get extended header size
$h->{ext_header_size} = 0;
if ($h->{ext_header}) {
$h->{ext_header_size} += 10;
read $fh, $bytes, 4;
@bytes = reverse unpack 'C4', $bytes;
for my $i (0..3) {
$h->{ext_header_size} += $bytes[$i] * 256 ** $i;
}
}
return $h;
return $h;
}
sub _unpack_head {
unpack('l', pack('L', unpack('N', $_[0])));
unpack('l', pack('L', unpack('N', $_[0])));
}
sub _close {
my($file, $fh) = @_;
unless (ref $file) { # filehandle not passed
close $fh or warn "Problem closing '$file': $!";
}
my($file, $fh) = @_;
unless (ref $file) { # filehandle not passed
close $fh or warn "Problem closing '$file': $!";
}
}
BEGIN {
@mp3_genres = (
@mp3_genres = (
'Blues',
'Classic Rock',
'Country',
@ -1583,7 +1583,7 @@ BEGIN {
'Synthpop',
);
@t_bitrate = ([
@t_bitrate = ([
[0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256],
[0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160],
[0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160]
@ -1593,17 +1593,17 @@ BEGIN {
[0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320]
]);
@t_sampling_freq = (
[11025, 12000, 8000],
[undef, undef, undef], # reserved
[22050, 24000, 16000],
[44100, 48000, 32000]
);
@t_sampling_freq = (
[11025, 12000, 8000],
[undef, undef, undef], # reserved
[22050, 24000, 16000],
[44100, 48000, 32000]
);
@frequency_tbl = map { $_ ? eval "${_}e-3" : 0 }
@frequency_tbl = map { $_ ? eval "${_}e-3" : 0 }
map { @$_ } @t_sampling_freq;
@mp3_info_fields = qw(
@mp3_info_fields = qw(
VERSION
LAYER
STEREO
@ -1624,12 +1624,12 @@ BEGIN {
VBR_SCALE
);
%v1_tag_fields =
(TITLE => 30, ARTIST => 30, ALBUM => 30, COMMENT => 30, YEAR => 4);
%v1_tag_fields =
(TITLE => 30, ARTIST => 30, ALBUM => 30, COMMENT => 30, YEAR => 4);
@v1_tag_names = qw(TITLE ARTIST ALBUM YEAR COMMENT TRACKNUM GENRE);
@v1_tag_names = qw(TITLE ARTIST ALBUM YEAR COMMENT TRACKNUM GENRE);
%v2_to_v1_names = (
%v2_to_v1_names = (
# v2.2 tags
'TT2' => 'TITLE',
'TP1' => 'ARTIST',
@ -1648,7 +1648,7 @@ BEGIN {
'TCON' => 'GENRE',
);
%v2_tag_names = (
%v2_tag_names = (
# v2.2 tags
'BUF' => 'Recommended buffer size',
'CNT' => 'Play counter',