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Diffstat (limited to '')
-rw-r--r-- | src/tag/ReplayGain.cxx | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/tag/ReplayGain.cxx b/src/tag/ReplayGain.cxx new file mode 100644 index 000000000..83a48f243 --- /dev/null +++ b/src/tag/ReplayGain.cxx @@ -0,0 +1,86 @@ +/* + * Copyright (C) 2003-2014 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 "config.h" +#include "ReplayGain.hxx" +#include "VorbisComment.hxx" +#include "ReplayGainInfo.hxx" +#include "util/ASCII.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.tuples[REPLAY_GAIN_TRACK].gain = atof(value); + return true; + } else if ((value = t["replaygain_album_gain"]) != nullptr) { + info.tuples[REPLAY_GAIN_ALBUM].gain = atof(value); + return true; + } else if ((value = t["replaygain_track_peak"]) != nullptr) { + info.tuples[REPLAY_GAIN_TRACK].peak = atof(value); + return true; + } else if ((value = t["replaygain_album_peak"]) != nullptr) { + info.tuples[REPLAY_GAIN_ALBUM].peak = atof(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 { + 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 { + return vorbis_comment_value(entry, n); + } + }; + + return ParseReplayGainTagTemplate(info, VorbisCommentEntry{entry}); +} |