mirror of
https://github.com/RGBCube/serenity
synced 2025-07-25 23:47:45 +00:00
LibAudio: Detect and read FLAC metadata
FLAC uses the very simple vorbis comment metadata format, which we can now read most standard and non-standard fields from.
This commit is contained in:
parent
d8e8ddedf3
commit
a8963a270f
5 changed files with 160 additions and 1 deletions
122
Userland/Libraries/LibAudio/VorbisComment.cpp
Normal file
122
Userland/Libraries/LibAudio/VorbisComment.cpp
Normal file
|
@ -0,0 +1,122 @@
|
|||
/*
|
||||
* Copyright (c) 2023, kleines Filmröllchen <filmroellchen@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#include "VorbisComment.h"
|
||||
#include <AK/Endian.h>
|
||||
#include <AK/MemoryStream.h>
|
||||
#include <AK/Span.h>
|
||||
#include <AK/String.h>
|
||||
|
||||
namespace Audio {
|
||||
|
||||
// "Content vector format"
|
||||
static ErrorOr<void> read_vorbis_field(Metadata& metadata_to_write_into, String const& unparsed_user_comment)
|
||||
{
|
||||
// Technically the field name has to be ASCII, but we just accept all UTF-8.
|
||||
auto field_name_and_contents = TRY(unparsed_user_comment.split_limit('=', 2));
|
||||
|
||||
if (field_name_and_contents.size() != 2)
|
||||
return Error::from_string_view("User comment does not contain '='"sv);
|
||||
auto contents = field_name_and_contents.take_last();
|
||||
auto field_name = TRY(field_name_and_contents.take_first().to_uppercase());
|
||||
|
||||
// Some of these are taken from https://age.hobba.nl/audio/tag_frame_reference.html
|
||||
if (field_name == "TITLE"sv) {
|
||||
if (metadata_to_write_into.title.has_value())
|
||||
TRY(metadata_to_write_into.add_miscellaneous(field_name, contents));
|
||||
else
|
||||
metadata_to_write_into.title = contents;
|
||||
} else if (field_name == "VERSION"sv) {
|
||||
if (metadata_to_write_into.subtitle.has_value())
|
||||
TRY(metadata_to_write_into.add_miscellaneous(field_name, contents));
|
||||
else
|
||||
metadata_to_write_into.subtitle = contents;
|
||||
} else if (field_name == "ALBUM"sv) {
|
||||
if (metadata_to_write_into.album.has_value())
|
||||
TRY(metadata_to_write_into.add_miscellaneous(field_name, contents));
|
||||
else
|
||||
metadata_to_write_into.album = contents;
|
||||
} else if (field_name == "COPYRIGHT"sv) {
|
||||
if (metadata_to_write_into.copyright.has_value())
|
||||
TRY(metadata_to_write_into.add_miscellaneous(field_name, contents));
|
||||
else
|
||||
metadata_to_write_into.copyright = contents;
|
||||
} else if (field_name == "ISRC"sv) {
|
||||
if (metadata_to_write_into.isrc.has_value())
|
||||
TRY(metadata_to_write_into.add_miscellaneous(field_name, contents));
|
||||
else
|
||||
metadata_to_write_into.isrc = contents;
|
||||
} else if (field_name == "GENRE"sv) {
|
||||
if (metadata_to_write_into.genre.has_value())
|
||||
TRY(metadata_to_write_into.add_miscellaneous(field_name, contents));
|
||||
else
|
||||
metadata_to_write_into.genre = contents;
|
||||
} else if (field_name == "COMMENT"sv) {
|
||||
if (metadata_to_write_into.comment.has_value())
|
||||
TRY(metadata_to_write_into.add_miscellaneous(field_name, contents));
|
||||
else
|
||||
metadata_to_write_into.comment = contents;
|
||||
} else if (field_name == "TRACKNUMBER"sv) {
|
||||
if (metadata_to_write_into.track_number.has_value())
|
||||
TRY(metadata_to_write_into.add_miscellaneous(field_name, contents));
|
||||
else if (auto maybe_number = contents.to_number<unsigned>(); maybe_number.has_value())
|
||||
metadata_to_write_into.track_number = maybe_number.release_value();
|
||||
else
|
||||
TRY(metadata_to_write_into.add_miscellaneous(field_name, contents));
|
||||
} else if (field_name == "DATE"sv) {
|
||||
if (metadata_to_write_into.unparsed_time.has_value())
|
||||
TRY(metadata_to_write_into.add_miscellaneous(field_name, contents));
|
||||
else
|
||||
metadata_to_write_into.unparsed_time = contents;
|
||||
} else if (field_name == "PERFORMER"sv) {
|
||||
TRY(metadata_to_write_into.add_person(Person::Role::Performer, contents));
|
||||
} else if (field_name == "ARTIST"sv) {
|
||||
TRY(metadata_to_write_into.add_person(Person::Role::Artist, contents));
|
||||
} else if (field_name == "COMPOSER"sv) {
|
||||
TRY(metadata_to_write_into.add_person(Person::Role::Composer, contents));
|
||||
} else if (field_name == "CONDUCTOR"sv) {
|
||||
TRY(metadata_to_write_into.add_person(Person::Role::Conductor, contents));
|
||||
} else if (field_name == "LYRICIST"sv) {
|
||||
TRY(metadata_to_write_into.add_person(Person::Role::Lyricist, contents));
|
||||
} else if (field_name == "ORGANIZATION"sv) {
|
||||
TRY(metadata_to_write_into.add_person(Person::Role::Publisher, contents));
|
||||
} else if (field_name == "PUBLISHER"sv) {
|
||||
TRY(metadata_to_write_into.add_person(Person::Role::Publisher, contents));
|
||||
} else if (field_name == "ENCODED-BY"sv) {
|
||||
TRY(metadata_to_write_into.add_person(Person::Role::Engineer, contents));
|
||||
} else {
|
||||
TRY(metadata_to_write_into.add_miscellaneous(field_name, contents));
|
||||
}
|
||||
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<Metadata, LoaderError> load_vorbis_comment(ByteBuffer const& vorbis_comment)
|
||||
{
|
||||
FixedMemoryStream stream { vorbis_comment };
|
||||
auto vendor_length = TRY(stream.read_value<LittleEndian<u32>>());
|
||||
Vector<u8> raw_vendor_string;
|
||||
TRY(raw_vendor_string.try_resize(vendor_length));
|
||||
TRY(stream.read_entire_buffer(raw_vendor_string));
|
||||
auto vendor_string = TRY(String::from_utf8(StringView { raw_vendor_string.span() }));
|
||||
|
||||
Metadata metadata;
|
||||
metadata.encoder = move(vendor_string);
|
||||
|
||||
auto user_comment_count = TRY(stream.read_value<LittleEndian<u32>>());
|
||||
for (size_t i = 0; i < user_comment_count; ++i) {
|
||||
auto user_comment_length = TRY(stream.read_value<LittleEndian<u32>>());
|
||||
Vector<u8> raw_user_comment;
|
||||
TRY(raw_user_comment.try_resize(user_comment_length));
|
||||
TRY(stream.read_entire_buffer(raw_user_comment));
|
||||
auto unparsed_user_comment = TRY(String::from_utf8(StringView { raw_user_comment.span() }));
|
||||
TRY(read_vorbis_field(metadata, unparsed_user_comment));
|
||||
}
|
||||
|
||||
return metadata;
|
||||
}
|
||||
|
||||
}
|
Loading…
Add table
Add a link
Reference in a new issue