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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.
*/
#include "VorbisComments.hxx"
#include "VorbisPicture.hxx"
#include "ScanVorbisComment.hxx"
#include "tag/Handler.hxx"
#include "tag/Builder.hxx"
#include "tag/Tag.hxx"
#include "tag/VorbisComment.hxx"
#include "tag/ReplayGain.hxx"
#include "ReplayGainInfo.hxx"
#include "util/StringView.hxx"
#include "decoder/Features.h"
#ifndef HAVE_TREMOR
#include <vorbis/codec.h>
#else
#include <tremor/ivorbiscodec.h>
#endif /* HAVE_TREMOR */
template<typename F>
static void
ForEachUserComment(const vorbis_comment &vc, F &&f)
{
const char *const*const user_comments = vc.user_comments;
const int*const comment_lengths = vc.comment_lengths;
const size_t n = vc.comments;
for (size_t i = 0; i < n; ++i)
f(StringView{user_comments[i], size_t(comment_lengths[i])});
}
bool
VorbisCommentToReplayGain(ReplayGainInfo &rgi,
const vorbis_comment &vc) noexcept
{
rgi.Clear();
bool found = false;
ForEachUserComment(vc, [&](StringView s){
if (ParseReplayGainVorbis(rgi, s.data))
found = true;
});
return found;
}
static void
vorbis_scan_comment(StringView comment, TagHandler &handler) noexcept
{
const auto picture_b64 = handler.WantPicture()
? GetVorbisCommentValue(comment, "METADATA_BLOCK_PICTURE")
: nullptr;
if (!picture_b64.IsNull())
return ScanVorbisPicture(picture_b64, handler);
ScanVorbisComment(comment, handler);
}
void
VorbisCommentScan(const vorbis_comment &vc, TagHandler &handler) noexcept
{
ForEachUserComment(vc, [&](StringView s){
vorbis_scan_comment(s, handler);
});
}
std::unique_ptr<Tag>
VorbisCommentToTag(const vorbis_comment &vc) noexcept
{
TagBuilder tag_builder;
AddTagHandler h(tag_builder);
VorbisCommentScan(vc, h);
return tag_builder.empty()
? nullptr
: tag_builder.CommitNew();
}