ce49d99c2f
Since we switched from autotools to Meson in commit
94592c1406, we don't need to include
`config.h` early to properly enable large file support. Meson passes
the required macros on the compiler command line instead of defining
them in `config.h`.
This means we can include `config.h` at any time, whenever we want to
check its macros, and there are no ordering constraints.
159 lines
3.3 KiB
C++
159 lines
3.3 KiB
C++
/*
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* Copyright 2003-2018 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "Tag.hxx"
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#include "Pool.hxx"
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#include "Builder.hxx"
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#include <assert.h>
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void
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Tag::Clear() noexcept
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{
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duration = SignedSongTime::Negative();
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has_playlist = false;
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{
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const std::lock_guard<Mutex> protect(tag_pool_lock);
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for (unsigned i = 0; i < num_items; ++i)
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tag_pool_put_item(items[i]);
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}
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delete[] items;
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items = nullptr;
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num_items = 0;
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}
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Tag::Tag(const Tag &other) noexcept
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:duration(other.duration), has_playlist(other.has_playlist),
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num_items(other.num_items),
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items(nullptr)
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{
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if (num_items > 0) {
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items = new TagItem *[num_items];
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const std::lock_guard<Mutex> protect(tag_pool_lock);
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for (unsigned i = 0; i < num_items; i++)
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items[i] = tag_pool_dup_item(other.items[i]);
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}
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}
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std::unique_ptr<Tag>
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Tag::Merge(const Tag &base, const Tag &add) noexcept
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{
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TagBuilder builder(add);
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builder.Complement(base);
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return builder.CommitNew();
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}
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std::unique_ptr<Tag>
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Tag::Merge(std::unique_ptr<Tag> base, std::unique_ptr<Tag> add) noexcept
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{
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if (add == nullptr)
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return base;
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if (base == nullptr)
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return add;
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return Merge(*base, *add);
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}
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const char *
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Tag::GetValue(TagType type) const noexcept
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{
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assert(type < TAG_NUM_OF_ITEM_TYPES);
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for (const auto &item : *this)
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if (item.type == type)
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return item.value;
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return nullptr;
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}
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bool
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Tag::HasType(TagType type) const noexcept
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{
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return GetValue(type) != nullptr;
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}
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static TagType
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DecaySort(TagType type) noexcept
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{
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switch (type) {
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case TAG_ARTIST_SORT:
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return TAG_ARTIST;
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case TAG_ALBUM_SORT:
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return TAG_ALBUM;
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case TAG_ALBUM_ARTIST_SORT:
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return TAG_ALBUM_ARTIST;
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default:
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return TAG_NUM_OF_ITEM_TYPES;
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}
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}
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static TagType
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Fallback(TagType type) noexcept
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{
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switch (type) {
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case TAG_ALBUM_ARTIST:
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return TAG_ARTIST;
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case TAG_MUSICBRAINZ_ALBUMARTISTID:
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return TAG_MUSICBRAINZ_ARTISTID;
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default:
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return TAG_NUM_OF_ITEM_TYPES;
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}
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}
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const char *
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Tag::GetSortValue(TagType type) const noexcept
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{
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const char *value = GetValue(type);
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if (value != nullptr)
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return value;
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/* try without *_SORT */
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const auto no_sort_type = DecaySort(type);
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if (no_sort_type != TAG_NUM_OF_ITEM_TYPES) {
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value = GetValue(no_sort_type);
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if (value != nullptr)
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return value;
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}
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/* fall back from TAG_ALBUM_ARTIST to TAG_ALBUM */
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type = Fallback(type);
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if (type != TAG_NUM_OF_ITEM_TYPES)
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return GetSortValue(type);
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if (no_sort_type != TAG_NUM_OF_ITEM_TYPES) {
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type = Fallback(no_sort_type);
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if (type != TAG_NUM_OF_ITEM_TYPES)
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return GetSortValue(type);
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}
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/* finally fall back to empty string */
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return "";
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}
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