replay_gain_*: convert to C++

Makefile.am

@@ -282,8 +282,8 @@ src_mpd_SOURCES = \
 	src/Queue.cxx src/Queue.hxx \
 	src/QueuePrint.cxx src/QueuePrint.hxx \
 	src/QueueSave.cxx src/QueueSave.hxx \
-	src/replay_gain_config.c \
-	src/replay_gain_info.c \
+	src/ReplayGainConfig.cxx \
+	src/ReplayGainInfo.cxx \
 	src/sig_handlers.c \
 	src/Song.cxx \
 	src/SongUpdate.cxx \
@@ -1102,7 +1102,7 @@ test_DumpPlaylist_SOURCES = test/DumpPlaylist.cxx \
 
 if HAVE_FLAC
 test_DumpPlaylist_SOURCES += \
-	src/replay_gain_info.c \
+	src/ReplayGainInfo.cxx \
 	src/decoder/FLACMetaData.cxx
 endif
 
@@ -1119,7 +1119,7 @@ test_run_decoder_SOURCES = test/run_decoder.c \
 	src/io_thread.c src/io_thread.h \
 	src/conf.c src/tokenizer.c src/utils.c src/string_util.c src/log.c \
 	src/tag.c src/tag_pool.c src/tag_handler.c \
-	src/replay_gain_info.c \
+	src/ReplayGainInfo.cxx \
 	src/uri.c \
 	src/fd_util.c \
 	src/audio_check.c \
@@ -1141,7 +1141,7 @@ test_read_tags_SOURCES = test/read_tags.c \
 	src/io_thread.c src/io_thread.h \
 	src/conf.c src/tokenizer.c src/utils.c src/string_util.c src/log.c \
 	src/tag.c src/tag_pool.c src/tag_handler.c \
-	src/replay_gain_info.c \
+	src/ReplayGainInfo.cxx \
 	src/uri.c \
 	src/fd_util.c \
 	src/audio_check.c \
@@ -1169,8 +1169,8 @@ test_run_filter_SOURCES = test/run_filter.c \
 	src/audio_check.c \
 	src/audio_format.c \
 	src/audio_parser.c \
-	src/replay_gain_config.c \
-	src/replay_gain_info.c \
+	src/ReplayGainConfig.cxx \
+	src/ReplayGainInfo.cxx \
 	src/AudioCompress/compress.c
 
 if ENABLE_DESPOTIFY
@@ -1280,8 +1280,8 @@ test_run_output_SOURCES = test/run_output.cxx \
 	src/filter_plugin.c \
 	src/filter_config.c \
 	src/AudioCompress/compress.c \
-	src/replay_gain_info.c \
-	src/replay_gain_config.c \
+	src/ReplayGainInfo.cxx \
+	src/ReplayGainConfig.cxx \
 	src/fd_util.c \
 	src/server_socket.c
 

src/replay_gain_config.c → src/ReplayGainConfig.cxx

@@ -18,10 +18,14 @@
  */
 
 #include "config.h"
+
+extern "C" {
 #include "replay_gain_config.h"
-#include "Playlist.hxx"
 #include "conf.h"
 #include "idle.h"
+}
+
+#include "Playlist.hxx"
 #include "mpd_error.h"
 
 #include <glib.h>

src/replay_gain_info.c → src/ReplayGainInfo.cxx

 /*
- * Copyright (C) 2003-2011 The Music Player Daemon Project
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -18,7 +18,10 @@
  */
 
 #include "config.h"
+
+extern "C" {
 #include "replay_gain_info.h"
+}
 
 float
 replay_gain_tuple_scale(const struct replay_gain_tuple *tuple, float preamp, float missing_preamp, bool peak_limit)