ReplayGain{Config,Global}: move to config/

src/config/PlayerConfig.cxx

@@ -25,13 +25,13 @@
 #include "util/RuntimeError.hxx"
 #include "Log.hxx"
 #include "MusicChunk.hxx"
-#include "ReplayGainGlobal.hxx"
 
 static constexpr
 size_t MIN_BUFFER_SIZE = std::max(CHUNK_SIZE * 32,
 				  64 * KILOBYTE);
 
 PlayerConfig::PlayerConfig(const ConfigData &config)
+	:replay_gain(config)
 {
 	size_t buffer_size = PlayerConfig::DEFAULT_BUFFER_SIZE;
 	if (auto *param = config.GetParam(ConfigOption::AUDIO_BUFFER_SIZE)) {
@@ -62,6 +62,4 @@ PlayerConfig::PlayerConfig(const ConfigData &config)
 
 		return ParseAudioFormat(s, true);
 	});
-
-	replay_gain = LoadReplayGainConfig(config);
 }

src/config/ReplayGainConfig.cxx

@@ -0,0 +1,58 @@
+/*
+ * 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 "ReplayGainConfig.hxx"
+#include "Data.hxx"
+
+#include <cassert>
+#include <cmath>
+#include <cstdlib>
+#include <stdexcept>
+
+static float
+ParsePreamp(const char *s)
+{
+	assert(s != nullptr);
+
+	char *endptr;
+	float f = std::strtof(s, &endptr);
+	if (endptr == s || *endptr != '\0')
+		throw std::invalid_argument("Not a numeric value");
+
+	if (f < -15.0f || f > 15.0f)
+		throw std::invalid_argument("Number must be between -15 and 15");
+
+	return std::pow(10.0f, f / 20.0f);
+}
+
+ReplayGainConfig::ReplayGainConfig(const ConfigData &config)
+	:preamp(config.With(ConfigOption::REPLAYGAIN_PREAMP, [](const char *s){
+		return s != nullptr
+			? ParsePreamp(s)
+			: 1.0f;
+	})),
+	 missing_preamp(config.With(ConfigOption::REPLAYGAIN_MISSING_PREAMP, [](const char *s){
+		 return s != nullptr
+			 ? ParsePreamp(s)
+			 : 1.0f;
+	 })),
+	 limit(config.GetBool(ConfigOption::REPLAYGAIN_LIMIT,
+			      ReplayGainConfig::DEFAULT_LIMIT))
+{
+}

src/config/ReplayGainConfig.hxx

@@ -0,0 +1,36 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+struct ConfigData;
+
+struct ReplayGainConfig {
+	static constexpr bool DEFAULT_LIMIT = true;
+
+	float preamp = 1.0;
+
+	float missing_preamp = 1.0;
+
+	bool limit = DEFAULT_LIMIT;
+
+	ReplayGainConfig() = default;
+
+	explicit ReplayGainConfig(const ConfigData &config);
+};