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/*
* Copyright 2003-2021 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/* necessary because libavutil/common.h uses UINT64_C */
#define __STDC_CONSTANT_MACROS
#include "FfmpegMetaData.hxx"
#include "tag/Table.hxx"
#include "tag/Handler.hxx"
#include "tag/Id3MusicBrainz.hxx"
#include "util/StringView.hxx"
extern "C" {
#include <libavutil/dict.h>
}
/**
* FFmpeg specific tag name mappings, as supported by
* libavformat/id3v2.c, libavformat/mov.c and others.
*/
static constexpr struct tag_table ffmpeg_tags[] = {
/* from libavformat/id3v2.c, libavformat/mov.c */
{ "album_artist", TAG_ALBUM_ARTIST },
/* from libavformat/id3v2.c */
{ "album-sort", TAG_ALBUM_SORT },
{ "artist-sort", TAG_ARTIST_SORT },
/* from libavformat/mov.c */
{ "sort_album_artist", TAG_ALBUM_ARTIST_SORT },
{ "sort_album", TAG_ALBUM_SORT },
{ "sort_artist", TAG_ARTIST_SORT },
/* sentinel */
{ nullptr, TAG_NUM_OF_ITEM_TYPES }
};
static void
FfmpegScanTag(TagType type,
AVDictionary *m, const char *name,
TagHandler &handler) noexcept
{
AVDictionaryEntry *mt = nullptr;
while ((mt = av_dict_get(m, name, mt, 0)) != nullptr)
handler.OnTag(type, mt->value);
}
static void
FfmpegScanPairs(AVDictionary *dict, TagHandler &handler) noexcept
{
AVDictionaryEntry *i = nullptr;
while ((i = av_dict_get(dict, "", i, AV_DICT_IGNORE_SUFFIX)) != nullptr)
handler.OnPair(i->key, i->value);
}
void
FfmpegScanDictionary(AVDictionary *dict, TagHandler &handler) noexcept
{
if (handler.WantTag()) {
for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i)
FfmpegScanTag(TagType(i), dict, tag_item_names[i],
handler);
for (const struct tag_table *i = ffmpeg_tags;
i->name != nullptr; ++i)
FfmpegScanTag(i->type, dict, i->name,
handler);
for (const struct tag_table *i = musicbrainz_txxx_tags;
i->name != nullptr; ++i)
FfmpegScanTag(i->type, dict, i->name,
handler);
}
if (handler.WantPair())
FfmpegScanPairs(dict, handler);
}
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