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/*
* Copyright 2003-2018 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 "ReplayGain.hxx"
#include "VorbisComment.hxx"
#include "ReplayGainInfo.hxx"
#include "util/ASCII.hxx"
#include "util/NumberParser.hxx"
#include <assert.h>
#include <stdlib.h>
template<typename T>
static bool
ParseReplayGainTagTemplate(ReplayGainInfo &info, const T t)
{
const char *value;
if ((value = t["replaygain_track_gain"]) != nullptr) {
info.track.gain = ParseFloat(value);
return true;
} else if ((value = t["replaygain_album_gain"]) != nullptr) {
info.album.gain = ParseFloat(value);
return true;
} else if ((value = t["replaygain_track_peak"]) != nullptr) {
info.track.peak = ParseFloat(value);
return true;
} else if ((value = t["replaygain_album_peak"]) != nullptr) {
info.album.peak = ParseFloat(value);
return true;
} else
return false;
}
bool
ParseReplayGainTag(ReplayGainInfo &info, const char *name, const char *value)
{
assert(name != nullptr);
assert(value != nullptr);
struct NameValue {
const char *name;
const char *value;
gcc_pure
const char *operator[](const char *n) const noexcept {
return StringEqualsCaseASCII(name, n)
? value
: nullptr;
}
};
return ParseReplayGainTagTemplate(info, NameValue{name, value});
}
bool
ParseReplayGainVorbis(ReplayGainInfo &info, const char *entry)
{
struct VorbisCommentEntry {
const char *entry;
gcc_pure
const char *operator[](const char *n) const noexcept {
return vorbis_comment_value(entry, n);
}
};
return ParseReplayGainTagTemplate(info, VorbisCommentEntry{entry});
}