88 lines
2.3 KiB
C++
88 lines
2.3 KiB
C++
/*
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* Copyright 2003-2017 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 "config.h"
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#include "ReplayGain.hxx"
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#include "VorbisComment.hxx"
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#include "ReplayGainInfo.hxx"
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#include "util/ASCII.hxx"
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#include "util/NumberParser.hxx"
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#include <assert.h>
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#include <stdlib.h>
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template<typename T>
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static bool
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ParseReplayGainTagTemplate(ReplayGainInfo &info, const T t)
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{
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const char *value;
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if ((value = t["replaygain_track_gain"]) != nullptr) {
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info.track.gain = ParseFloat(value);
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return true;
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} else if ((value = t["replaygain_album_gain"]) != nullptr) {
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info.album.gain = ParseFloat(value);
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return true;
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} else if ((value = t["replaygain_track_peak"]) != nullptr) {
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info.track.peak = ParseFloat(value);
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return true;
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} else if ((value = t["replaygain_album_peak"]) != nullptr) {
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info.album.peak = ParseFloat(value);
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return true;
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} else
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return false;
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}
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bool
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ParseReplayGainTag(ReplayGainInfo &info, const char *name, const char *value)
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{
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assert(name != nullptr);
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assert(value != nullptr);
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struct NameValue {
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const char *name;
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const char *value;
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gcc_pure
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const char *operator[](const char *n) const noexcept {
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return StringEqualsCaseASCII(name, n)
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? value
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: nullptr;
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}
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};
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return ParseReplayGainTagTemplate(info, NameValue{name, value});
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}
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bool
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ParseReplayGainVorbis(ReplayGainInfo &info, const char *entry)
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{
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struct VorbisCommentEntry {
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const char *entry;
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gcc_pure
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const char *operator[](const char *n) const noexcept {
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return vorbis_comment_value(entry, n);
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}
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};
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return ParseReplayGainTagTemplate(info, VorbisCommentEntry{entry});
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}
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