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This container has several design goals: - Represent all common and relevant metadata fields of audio files in a unified way. - Allow perfect recreation of any metadata format from the in-memory structure. This requires that we allow non-detected fields to reside in an "untyped" miscellaneous collection. Like with pictures, plugins are free to store their metadata into the m_metadata field whenever they read it. It is recommended that this happens on loader creation; however failing to read metadata should not cause an error in the plugin.
70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
/*
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* Copyright (c) 2023, kleines Filmröllchen <filmroellchen@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/HashMap.h>
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#include <AK/LexicalPath.h>
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#include <AK/Optional.h>
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#include <AK/String.h>
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#include <AK/Time.h>
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#include <AK/Variant.h>
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namespace Audio {
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struct Person {
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enum class Role {
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Artist,
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Performer,
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Lyricist,
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Conductor,
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Publisher,
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Engineer,
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Composer,
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};
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Role role;
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String name;
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// Whether this person has creative involvement with the song (so not only Role::Artist!).
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// This list is subjective and is intended to keep the artist display text in applications relevant.
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// It is used for first_artist and all_artists in Metadata.
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bool is_artist() const;
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Optional<StringView> name_for_role() const;
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};
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// Audio metadata of the original format must be equivalently reconstructible from this struct.
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// That means, (if the format allows it) fields can appear in a different order, but all fields must be present with the original values,
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// including duplicate fields where allowed by the format.
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struct Metadata {
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using Year = unsigned;
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void replace_encoder_with_serenity();
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ErrorOr<void> add_miscellaneous(String const& field, String value);
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ErrorOr<void> add_person(Person::Role role, String name);
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Optional<String> first_artist() const;
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ErrorOr<Optional<String>> all_artists(StringView concatenate_with = ", "sv) const;
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Optional<String> title;
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Optional<String> subtitle;
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Optional<unsigned> track_number;
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Optional<String> album;
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Optional<String> genre;
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Optional<String> comment;
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Optional<String> isrc;
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Optional<String> encoder;
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Optional<String> copyright;
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Optional<float> bpm;
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// FIXME: Until the time data structure situation is solved in a good way, we don't parse ISO 8601 time specifications.
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Optional<String> unparsed_time;
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Vector<Person> people;
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// Any other metadata, using the format-specific field names. This ensures reproducibility.
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HashMap<String, Vector<String>> miscellaneous;
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};
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}
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