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https://github.com/RGBCube/serenity
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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.
94 lines
3 KiB
C++
94 lines
3 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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#include "Metadata.h"
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#include <AK/Assertions.h>
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#include <LibCore/Version.h>
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namespace Audio {
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bool Person::is_artist() const
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{
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return role == Person::Role::Artist
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|| role == Person::Role::Composer
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|| role == Person::Role::Conductor
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|| role == Person::Role::Lyricist
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|| role == Person::Role::Performer;
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}
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Optional<StringView> Person::name_for_role() const
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{
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switch (role) {
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case Role::Artist:
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case Role::Performer:
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return {};
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case Role::Lyricist:
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return "Lyricist"sv;
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case Role::Conductor:
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return "Conductor"sv;
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case Role::Publisher:
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return "Publisher"sv;
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case Role::Engineer:
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return "Engineer"sv;
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case Role::Composer:
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return "Composer"sv;
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}
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VERIFY_NOT_REACHED();
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}
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void Metadata::replace_encoder_with_serenity()
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{
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auto version_or_error = Core::Version::read_long_version_string();
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// Unset the encoder field in this case; we definitely want to replace the existing encoder field.
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if (version_or_error.is_error())
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encoder = {};
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auto encoder_string = String::formatted("SerenityOS LibAudio {}", version_or_error.release_value());
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if (encoder_string.is_error())
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encoder = {};
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encoder = encoder_string.release_value();
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}
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Optional<String> Metadata::first_artist() const
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{
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auto artist = people.find_if([](auto const& person) { return person.is_artist(); });
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if (artist.is_end())
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return {};
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return artist->name;
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}
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ErrorOr<Optional<String>> Metadata::all_artists(StringView concatenate_with) const
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{
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// FIXME: This entire function could be similar to TRY(TRY(people.filter(...).try_map(...)).join(concatenate_with)) if these functional iterator transformers existed :^)
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Vector<String> artist_texts;
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TRY(artist_texts.try_ensure_capacity(people.size()));
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for (auto const& person : people) {
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if (!person.is_artist())
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continue;
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if (auto role_name = person.name_for_role(); role_name.has_value())
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artist_texts.unchecked_append(TRY(String::formatted("{} ({})", person.name, role_name.release_value())));
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else
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artist_texts.unchecked_append(person.name);
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}
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if (artist_texts.is_empty())
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return Optional<String> {};
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return String::join(concatenate_with, artist_texts);
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}
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ErrorOr<void> Metadata::add_miscellaneous(String const& field, String value)
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{
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// FIXME: Since try_ensure does not return a reference to the contained value, we have to retrieve it separately.
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// This is a try_ensure bug that should be fixed.
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(void)TRY(miscellaneous.try_ensure(field, []() { return Vector<String> {}; }));
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auto& values_for_field = miscellaneous.get(field).release_value();
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return values_for_field.try_append(move(value));
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}
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ErrorOr<void> Metadata::add_person(Person::Role role, String name)
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{
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return people.try_append(Person { role, move(name) });
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}
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}
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