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71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#include "ReplayGainParser.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/CNumberParser.hxx"
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#include <cassert>
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template<typename T>
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static bool
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ParseReplayGainTagTemplate(ReplayGainInfo &info, const T t) noexcept
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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,
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const char *name, const char *value) noexcept
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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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[[gnu::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, std::string_view entry) noexcept
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{
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struct VorbisCommentEntry {
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std::string_view entry;
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[[gnu::pure]]
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const char *operator[](std::string_view n) const noexcept {
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return GetVorbisCommentValue(entry, n).data();
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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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