filter: convert to C++

24 files changed, 121 insertions, 137 deletions

diff --git a/Makefile.am b/Makefile.am
index de818855e..0e770efea 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -57,9 +57,6 @@ mpd_headers = \
 	src/output_internal.h \
 	src/output_api.h \
 	src/filter_internal.h \
-	src/filter_plugin.h \
-	src/filter_registry.h \
-	src/filter/chain_filter_plugin.h \
 	src/command.h \
 	src/conf.h \
 	src/decoder_plugin.h \
@@ -168,8 +165,8 @@ src_mpd_SOURCES = \
 	src/ExcludeList.cxx src/ExcludeList.hxx \
 	src/fd_util.c \
 	src/FilterConfig.cxx src/FilterConfig.hxx \
-	src/filter_plugin.c \
-	src/filter_registry.c \
+	src/FilterPlugin.cxx src/FilterPlugin.hxx \
+	src/FilterRegistry.cxx src/FilterRegistry.hxx \
 	src/UpdateGlue.cxx src/UpdateGlue.hxx \
 	src/UpdateQueue.cxx src/UpdateQueue.hxx \
 	src/UpdateIO.cxx src/UpdateIO.hxx \
@@ -968,14 +965,15 @@ endif
 #
 
 libfilter_plugins_a_SOURCES = \
-	src/filter/null_filter_plugin.c \
-	src/filter/chain_filter_plugin.c \
+	src/filter/NullFilterPlugin.cxx \
+	src/filter/ChainFilterPlugin.cxx \
+	src/filter/ChainFilterPlugin.hxx \
 	src/filter/AutoConvertFilterPlugin.cxx \
 	src/filter/AutoConvertFilterPlugin.hxx \
 	src/filter/ConvertFilterPlugin.cxx \
 	src/filter/ConvertFilterPlugin.hxx \
-	src/filter/route_filter_plugin.c \
-	src/filter/normalize_filter_plugin.c \
+	src/filter/RouteFilterPlugin.cxx \
+	src/filter/NormalizeFilterPlugin.cxx \
 	src/filter/ReplayGainFilterPlugin.cxx \
 	src/filter/ReplayGainFilterPlugin.hxx \
 	src/filter/VolumeFilterPlugin.cxx \
@@ -1239,8 +1237,7 @@ test_run_filter_LDADD = \
 test_run_filter_SOURCES = test/run_filter.cxx \
 	test/FakeReplayGainConfig.cxx \
 	test/stdbin.h \
-	src/filter_plugin.c \
-	src/filter_registry.c \
+	src/FilterPlugin.cxx src/FilterRegistry.cxx \
 	src/tokenizer.c src/utils.c src/string_util.c \
 	src/audio_check.c \
 	src/audio_format.c \
@@ -1350,7 +1347,7 @@ test_run_output_SOURCES = test/run_output.cxx \
 	src/mixer_api.c \
 	src/mixer_control.c \
 	src/mixer_type.c \
-	src/filter_plugin.c \
+	src/FilterPlugin.cxx \
 	src/FilterConfig.cxx \
 	src/AudioCompress/compress.c \
 	src/ReplayGainInfo.cxx \
@@ -1367,7 +1364,7 @@ test_read_mixer_LDADD = \
 test_read_mixer_SOURCES = test/read_mixer.cxx \
 	src/tokenizer.c src/utils.c src/string_util.c \
 	src/mixer_control.c src/mixer_api.c \
-	src/filter_plugin.c \
+	src/FilterPlugin.cxx \
 	src/filter/VolumeFilterPlugin.cxx \
 	src/fd_util.c
 
diff --git a/src/FilterConfig.cxx b/src/FilterConfig.cxx
index 8d4dc5771..7fca2ae67 100644
--- a/src/FilterConfig.cxx
+++ b/src/FilterConfig.cxx
@@ -20,14 +20,10 @@
 #include "config.h"
 #include "FilterConfig.hxx"
 #include "conf.h"
-
-extern "C" {
-#include "filter/chain_filter_plugin.h"
-}
-
-#include "filter_plugin.h"
-#include "filter_internal.h"
-#include "filter_registry.h"
+#include "filter/ChainFilterPlugin.hxx"
+#include "FilterPlugin.hxx"
+#include "FilterInternal.hxx"
+#include "FilterRegistry.hxx"
 
 #include <glib.h>
 
diff --git a/src/filter_internal.h b/src/FilterInternal.hxx
index 4e94599a2..7ffcec334 100644
--- a/src/filter_internal.h
+++ b/src/FilterInternal.hxx
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -22,8 +22,8 @@
  * Internal stuff for the filter core and filter plugins.
  */
 
-#ifndef MPD_FILTER_INTERNAL_H
-#define MPD_FILTER_INTERNAL_H
+#ifndef MPD_FILTER_INTERNAL_HXX
+#define MPD_FILTER_INTERNAL_HXX
 
 struct filter {
 	const struct filter_plugin *plugin;
diff --git a/src/filter_plugin.c b/src/FilterPlugin.cxx
index 2e3c8fec0..f1f7561a9 100644
--- a/src/filter_plugin.c
+++ b/src/FilterPlugin.cxx
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -18,9 +18,9 @@
  */
 
 #include "config.h"
-#include "filter_plugin.h"
-#include "filter_internal.h"
-#include "filter_registry.h"
+#include "FilterPlugin.hxx"
+#include "FilterInternal.hxx"
+#include "FilterRegistry.hxx"
 #include "conf.h"
 #include "ConfigQuark.hxx"
 
diff --git a/src/filter_plugin.h b/src/FilterPlugin.hxx
index ae14a245c..6476a621f 100644
--- a/src/filter_plugin.h
+++ b/src/FilterPlugin.hxx
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -23,12 +23,11 @@
  * plugin API for objects which filter raw PCM data.
  */
 
-#ifndef MPD_FILTER_PLUGIN_H
-#define MPD_FILTER_PLUGIN_H
+#ifndef MPD_FILTER_PLUGIN_HXX
+#define MPD_FILTER_PLUGIN_HXX
 
 #include "gerror.h"
 
-#include <stdbool.h>
 #include <stddef.h>
 
 struct config_param;
@@ -74,10 +73,6 @@ struct filter_plugin {
 			      GError **error_r);
 };
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 /**
  * Creates a new instance of the specified filter plugin.
  *
@@ -151,8 +146,4 @@ filter_filter(struct filter *filter, const void *src, size_t src_size,
 	      size_t *dest_size_r,
 	      GError **error_r);
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif
diff --git a/src/filter_registry.c b/src/FilterRegistry.cxx
index dc1889398..c8aff8298 100644
--- a/src/filter_registry.c
+++ b/src/FilterRegistry.cxx
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -18,8 +18,8 @@
  */
 
 #include "config.h"
-#include "filter_registry.h"
-#include "filter_plugin.h"
+#include "FilterRegistry.hxx"
+#include "FilterPlugin.hxx"
 
 #include <stddef.h>
 #include <string.h>
diff --git a/src/filter_registry.h b/src/FilterRegistry.hxx
index d3949c7c4..c21d8a597 100644
--- a/src/filter_registry.h
+++ b/src/FilterRegistry.hxx
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -23,8 +23,8 @@
  * compile time.
  */
 
-#ifndef MPD_FILTER_REGISTRY_H
-#define MPD_FILTER_REGISTRY_H
+#ifndef MPD_FILTER_REGISTRY_HXX
+#define MPD_FILTER_REGISTRY_HXX
 
 extern const struct filter_plugin null_filter_plugin;
 extern const struct filter_plugin chain_filter_plugin;
diff --git a/src/OutputControl.cxx b/src/OutputControl.cxx
index 8e7447bc5..37565082e 100644
--- a/src/OutputControl.cxx
+++ b/src/OutputControl.cxx
@@ -30,7 +30,7 @@ extern "C" {
 
 #include "notify.hxx"
 #include "filter/ReplayGainFilterPlugin.hxx"
-#include "filter_plugin.h"
+#include "FilterPlugin.hxx"
 
 #include <assert.h>
 #include <stdlib.h>
diff --git a/src/OutputFinish.cxx b/src/OutputFinish.cxx
index ac6ad6977..f5a1f9921 100644
--- a/src/OutputFinish.cxx
+++ b/src/OutputFinish.cxx
@@ -23,9 +23,10 @@ extern "C" {
 #include "output_internal.h"
 #include "output_plugin.h"
 #include "mixer_control.h"
-#include "filter_plugin.h"
 }
 
+#include "FilterPlugin.hxx"
+
 #include <assert.h>
 
 void
diff --git a/src/OutputInit.cxx b/src/OutputInit.cxx
index 6cd1e08ba..5acb8c6cb 100644
--- a/src/OutputInit.cxx
+++ b/src/OutputInit.cxx
@@ -30,14 +30,14 @@ extern "C" {
 #include "mixer_control.h"
 #include "mixer_type.h"
 #include "mixer_list.h"
-#include "filter_plugin.h"
-#include "filter_registry.h"
-#include "filter/chain_filter_plugin.h"
 }
 
 #include "mixer/SoftwareMixerPlugin.hxx"
+#include "FilterPlugin.hxx"
+#include "FilterRegistry.hxx"
 #include "filter/AutoConvertFilterPlugin.hxx"
 #include "filter/ReplayGainFilterPlugin.hxx"
+#include "filter/ChainFilterPlugin.hxx"
 
 #include <glib.h>
 
diff --git a/src/OutputThread.cxx b/src/OutputThread.cxx
index c7b01d957..e3efbceaa 100644
--- a/src/OutputThread.cxx
+++ b/src/OutputThread.cxx
@@ -24,10 +24,10 @@
 
 extern "C" {
 #include "output_internal.h"
-#include "filter_plugin.h"
 }
 
 #include "notify.hxx"
+#include "FilterPlugin.hxx"
 #include "filter/ConvertFilterPlugin.hxx"
 #include "filter/ReplayGainFilterPlugin.hxx"
 #include "PlayerControl.hxx"
diff --git a/src/filter/AutoConvertFilterPlugin.cxx b/src/filter/AutoConvertFilterPlugin.cxx
index 3a8c087ba..2a183b579 100644
--- a/src/filter/AutoConvertFilterPlugin.cxx
+++ b/src/filter/AutoConvertFilterPlugin.cxx
@@ -20,9 +20,9 @@
 #include "config.h"
 #include "AutoConvertFilterPlugin.hxx"
 #include "ConvertFilterPlugin.hxx"
-#include "filter_plugin.h"
-#include "filter_internal.h"
-#include "filter_registry.h"
+#include "FilterPlugin.hxx"
+#include "FilterInternal.hxx"
+#include "FilterRegistry.hxx"
 #include "audio_format.h"
 
 #include <assert.h>
diff --git a/src/filter/chain_filter_plugin.c b/src/filter/ChainFilterPlugin.cxx
index 0788b6751..51eb4b6f6 100644
--- a/src/filter/chain_filter_plugin.c
+++ b/src/filter/ChainFilterPlugin.cxx
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -18,22 +18,26 @@
  */
 
 #include "config.h"
+#include "ChainFilterPlugin.hxx"
 #include "conf.h"
-#include "filter/chain_filter_plugin.h"
-#include "filter_plugin.h"
-#include "filter_internal.h"
-#include "filter_registry.h"
+#include "FilterPlugin.hxx"
+#include "FilterInternal.hxx"
+#include "FilterRegistry.hxx"
 #include "audio_format.h"
 
 #include <glib.h>
 
 #include <assert.h>
 
-struct filter_chain {
+struct ChainFilter {
 	/** the base class */
 	struct filter base;
 
 	GSList *children;
+
+	ChainFilter():children(nullptr) {
+		filter_init(&base, &chain_filter_plugin);
+	}
 };
 
 static inline GQuark
@@ -46,10 +50,7 @@ static struct filter *
 chain_filter_init(G_GNUC_UNUSED const struct config_param *param,
 		  G_GNUC_UNUSED GError **error_r)
 {
-	struct filter_chain *chain = g_new(struct filter_chain, 1);
-
-	filter_init(&chain->base, &chain_filter_plugin);
-	chain->children = NULL;
+	ChainFilter *chain = new ChainFilter();
 
 	return &chain->base;
 }
@@ -57,7 +58,7 @@ chain_filter_init(G_GNUC_UNUSED const struct config_param *param,
 static void
 chain_free_child(gpointer data, G_GNUC_UNUSED gpointer user_data)
 {
-	struct filter *filter = data;
+	struct filter *filter = (struct filter *)data;
 
 	filter_free(filter);
 }
@@ -65,12 +66,12 @@ chain_free_child(gpointer data, G_GNUC_UNUSED gpointer user_data)
 static void
 chain_filter_finish(struct filter *_filter)
 {
-	struct filter_chain *chain = (struct filter_chain *)_filter;
+	ChainFilter *chain = (ChainFilter *)_filter;
 
 	g_slist_foreach(chain->children, chain_free_child, NULL);
 	g_slist_free(chain->children);
 
-	g_free(chain);
+	delete chain;
 }
 
 /**
@@ -78,10 +79,9 @@ chain_filter_finish(struct filter *_filter)
  * itself is not closed.
  */
 static void
-chain_close_until(struct filter_chain *chain, const struct filter *until)
+chain_close_until(ChainFilter *chain, const struct filter *until)
 {
 	GSList *i = chain->children;
-	struct filter *filter;
 
 	while (true) {
 		/* this assertion fails if #until does not exist
@@ -93,7 +93,7 @@ chain_close_until(struct filter_chain *chain, const struct filter *until)
 			break;
 
 		/* close this filter */
-		filter = i->data;
+		struct filter *filter = (struct filter *)i->data;
 		filter_close(filter);
 
 		i = g_slist_next(i);
@@ -130,11 +130,11 @@ static const struct audio_format *
 chain_filter_open(struct filter *_filter, struct audio_format *in_audio_format,
 		  GError **error_r)
 {
-	struct filter_chain *chain = (struct filter_chain *)_filter;
+	ChainFilter *chain = (ChainFilter *)_filter;
 	const struct audio_format *audio_format = in_audio_format;
 
 	for (GSList *i = chain->children; i != NULL; i = g_slist_next(i)) {
-		struct filter *filter = i->data;
+		struct filter *filter = (struct filter *)i->data;
 
 		audio_format = chain_open_child(filter, audio_format, error_r);
 		if (audio_format == NULL) {
@@ -151,7 +151,7 @@ chain_filter_open(struct filter *_filter, struct audio_format *in_audio_format,
 static void
 chain_close_child(gpointer data, G_GNUC_UNUSED gpointer user_data)
 {
-	struct filter *filter = data;
+	struct filter *filter = (struct filter *)data;
 
 	filter_close(filter);
 }
@@ -159,7 +159,7 @@ chain_close_child(gpointer data, G_GNUC_UNUSED gpointer user_data)
 static void
 chain_filter_close(struct filter *_filter)
 {
-	struct filter_chain *chain = (struct filter_chain *)_filter;
+	ChainFilter *chain = (ChainFilter *)_filter;
 
 	g_slist_foreach(chain->children, chain_close_child, NULL);
 }
@@ -169,10 +169,10 @@ chain_filter_filter(struct filter *_filter,
 		    const void *src, size_t src_size,
 		    size_t *dest_size_r, GError **error_r)
 {
-	struct filter_chain *chain = (struct filter_chain *)_filter;
+	ChainFilter *chain = (ChainFilter *)_filter;
 
 	for (GSList *i = chain->children; i != NULL; i = g_slist_next(i)) {
-		struct filter *filter = i->data;
+		struct filter *filter = (struct filter *)i->data;
 
 		/* feed the output of the previous filter as input
 		   into the current one */
@@ -187,12 +187,12 @@ chain_filter_filter(struct filter *_filter,
 }
 
 const struct filter_plugin chain_filter_plugin = {
-	.name = "chain",
-	.init = chain_filter_init,
-	.finish = chain_filter_finish,
-	.open = chain_filter_open,
-	.close = chain_filter_close,
-	.filter = chain_filter_filter,
+	"chain",
+	chain_filter_init,
+	chain_filter_finish,
+	chain_filter_open,
+	chain_filter_close,
+	chain_filter_filter,
 };
 
 struct filter *
@@ -208,8 +208,7 @@ filter_chain_new(void)
 void
 filter_chain_append(struct filter *_chain, struct filter *filter)
 {
-	struct filter_chain *chain = (struct filter_chain *)_chain;
+	ChainFilter *chain = (ChainFilter *)_chain;
 
 	chain->children = g_slist_append(chain->children, filter);
 }
-
diff --git a/src/filter/chain_filter_plugin.h b/src/filter/ChainFilterPlugin.hxx
index 1dba46667..242d29dae 100644
--- a/src/filter/chain_filter_plugin.h
+++ b/src/filter/ChainFilterPlugin.hxx
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -24,8 +24,8 @@
  * output to the next one.
  */
 
-#ifndef MPD_FILTER_CHAIN_H
-#define MPD_FILTER_CHAIN_H
+#ifndef MPD_FILTER_CHAIN_HXX
+#define MPD_FILTER_CHAIN_HXX
 
 struct filter;
 
diff --git a/src/filter/ConvertFilterPlugin.cxx b/src/filter/ConvertFilterPlugin.cxx
index 6a5acd707..b07cf80f1 100644
--- a/src/filter/ConvertFilterPlugin.cxx
+++ b/src/filter/ConvertFilterPlugin.cxx
@@ -19,9 +19,9 @@
 
 #include "config.h"
 #include "ConvertFilterPlugin.hxx"
-#include "filter_plugin.h"
-#include "filter_internal.h"
-#include "filter_registry.h"
+#include "FilterPlugin.hxx"
+#include "FilterInternal.hxx"
+#include "FilterRegistry.hxx"
 #include "conf.h"
 #include "PcmConvert.hxx"
 #include "util/Manual.hxx"
diff --git a/src/filter/normalize_filter_plugin.c b/src/filter/NormalizeFilterPlugin.cxx
index 2151482e4..0dc36c5bc 100644
--- a/src/filter/normalize_filter_plugin.c
+++ b/src/filter/NormalizeFilterPlugin.cxx
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -18,9 +18,9 @@
  */
 
 #include "config.h"
-#include "filter_plugin.h"
-#include "filter_internal.h"
-#include "filter_registry.h"
+#include "FilterPlugin.hxx"
+#include "FilterInternal.hxx"
+#include "FilterRegistry.hxx"
 #include "pcm_buffer.h"
 #include "audio_format.h"
 #include "AudioCompress/compress.h"
@@ -90,9 +90,8 @@ normalize_filter_filter(struct filter *_filter,
 			G_GNUC_UNUSED GError **error_r)
 {
 	struct normalize_filter *filter = (struct normalize_filter *)_filter;
-	void *dest;
 
-	dest = pcm_buffer_get(&filter->buffer, src_size);
+	int16_t *dest = (int16_t *)pcm_buffer_get(&filter->buffer, src_size);
 
 	memcpy(dest, src, src_size);
 
@@ -103,10 +102,10 @@ normalize_filter_filter(struct filter *_filter,
 }
 
 const struct filter_plugin normalize_filter_plugin = {
-	.name = "normalize",
-	.init = normalize_filter_init,
-	.finish = normalize_filter_finish,
-	.open = normalize_filter_open,
-	.close = normalize_filter_close,
-	.filter = normalize_filter_filter,
+	"normalize",
+	normalize_filter_init,
+	normalize_filter_finish,
+	normalize_filter_open,
+	normalize_filter_close,
+	normalize_filter_filter,
 };
diff --git a/src/filter/null_filter_plugin.c b/src/filter/NullFilterPlugin.cxx
index 7728c55bf..9c1a9c959 100644
--- a/src/filter/null_filter_plugin.c
+++ b/src/filter/NullFilterPlugin.cxx
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -25,9 +25,9 @@
  */
 
 #include "config.h"
-#include "filter_plugin.h"
-#include "filter_internal.h"
-#include "filter_registry.h"
+#include "FilterPlugin.hxx"
+#include "FilterInternal.hxx"
+#include "FilterRegistry.hxx"
 
 #include <glib.h>
 #include <assert.h>
@@ -85,10 +85,10 @@ null_filter_filter(struct filter *_filter,
 }
 
 const struct filter_plugin null_filter_plugin = {
-	.name = "null",
-	.init = null_filter_init,
-	.finish = null_filter_finish,
-	.open = null_filter_open,
-	.close = null_filter_close,
-	.filter = null_filter_filter,
+	"null",
+	null_filter_init,
+	null_filter_finish,
+	null_filter_open,
+	null_filter_close,
+	null_filter_filter,
 };
diff --git a/src/filter/ReplayGainFilterPlugin.cxx b/src/filter/ReplayGainFilterPlugin.cxx
index 9fb412be7..856213530 100644
--- a/src/filter/ReplayGainFilterPlugin.cxx
+++ b/src/filter/ReplayGainFilterPlugin.cxx
@@ -19,9 +19,9 @@
 
 #include "config.h"
 #include "ReplayGainFilterPlugin.hxx"
-#include "filter_plugin.h"
-#include "filter_internal.h"
-#include "filter_registry.h"
+#include "FilterPlugin.hxx"
+#include "FilterInternal.hxx"
+#include "FilterRegistry.hxx"
 #include "audio_format.h"
 #include "replay_gain_info.h"
 #include "replay_gain_config.h"
diff --git a/src/filter/route_filter_plugin.c b/src/filter/RouteFilterPlugin.cxx
index c0ecbd9c8..35f8c5c76 100644
--- a/src/filter/route_filter_plugin.c
+++ b/src/filter/RouteFilterPlugin.cxx
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -44,9 +44,9 @@
 #include "ConfigQuark.hxx"
 #include "audio_format.h"
 #include "audio_check.h"
-#include "filter_plugin.h"
-#include "filter_internal.h"
-#include "filter_registry.h"
+#include "FilterPlugin.hxx"
+#include "FilterInternal.hxx"
+#include "FilterRegistry.hxx"
 #include "pcm_buffer.h"
 
 #include <assert.h>
@@ -188,7 +188,7 @@ route_filter_parse(const struct config_param *param,
 	}
 
 	// Allocate a map of "copy nothing to me"
-	filter->sources =
+	filter->sources = (signed char *)
 		g_malloc(filter->min_output_channels * sizeof(signed char));
 
 	for (int i=0; i<filter->min_output_channels; ++i)
@@ -295,14 +295,15 @@ route_filter_filter(struct filter *_filter,
 		audio_format_sample_size(&filter->input_format);
 
 	// A moving pointer that always refers to channel 0 in the input, at the currently handled frame
-	const uint8_t *base_source = src;
+	const uint8_t *base_source = (const uint8_t *)src;
 
 	// A moving pointer that always refers to the currently filled channel of the currently handled frame, in the output
 	uint8_t *chan_destination;
 
 	// Grow our reusable buffer, if needed, and set the moving pointer
 	*dest_size_r = number_of_frames * filter->output_frame_size;
-	chan_destination = pcm_buffer_get(&filter->output_buffer, *dest_size_r);
+	chan_destination = (uint8_t *)
+		pcm_buffer_get(&filter->output_buffer, *dest_size_r);
 
 
 	// Perform our copy operations, with N input channels and M output channels
@@ -340,10 +341,10 @@ route_filter_filter(struct filter *_filter,
 }
 
 const struct filter_plugin route_filter_plugin = {
-	.name = "route",
-	.init = route_filter_init,
-	.finish = route_filter_finish,
-	.open = route_filter_open,
-	.close = route_filter_close,
-	.filter = route_filter_filter,
+	"route",
+	route_filter_init,
+	route_filter_finish,
+	route_filter_open,
+	route_filter_close,
+	route_filter_filter,
 };
diff --git a/src/filter/VolumeFilterPlugin.cxx b/src/filter/VolumeFilterPlugin.cxx
index 5066ebbfa..f1a1f4784 100644
--- a/src/filter/VolumeFilterPlugin.cxx
+++ b/src/filter/VolumeFilterPlugin.cxx
@@ -19,9 +19,9 @@
 
 #include "config.h"
 #include "VolumeFilterPlugin.hxx"
-#include "filter_plugin.h"
-#include "filter_internal.h"
-#include "filter_registry.h"
+#include "FilterPlugin.hxx"
+#include "FilterInternal.hxx"
+#include "FilterRegistry.hxx"
 #include "conf.h"
 #include "pcm_buffer.h"
 #include "PcmVolume.hxx"
diff --git a/src/mixer/SoftwareMixerPlugin.cxx b/src/mixer/SoftwareMixerPlugin.cxx
index c06ce18ea..9b8f083f4 100644
--- a/src/mixer/SoftwareMixerPlugin.cxx
+++ b/src/mixer/SoftwareMixerPlugin.cxx
@@ -20,8 +20,8 @@
 #include "config.h"
 #include "SoftwareMixerPlugin.hxx"
 #include "mixer_api.h"
-#include "filter_plugin.h"
-#include "filter_registry.h"
+#include "FilterPlugin.hxx"
+#include "FilterRegistry.hxx"
 #include "filter/VolumeFilterPlugin.hxx"
 #include "PcmVolume.hxx"
 
diff --git a/test/read_mixer.cxx b/test/read_mixer.cxx
index d0426c9a9..5cd9b2c52 100644
--- a/test/read_mixer.cxx
+++ b/test/read_mixer.cxx
@@ -22,9 +22,9 @@
 extern "C" {
 #include "mixer_control.h"
 #include "mixer_list.h"
-#include "filter_registry.h"
 }
 
+#include "FilterRegistry.hxx"
 #include "PcmVolume.hxx"
 #include "GlobalEvents.hxx"
 #include "Main.hxx"
diff --git a/test/run_filter.cxx b/test/run_filter.cxx
index 2d53ed496..1800996cb 100644
--- a/test/run_filter.cxx
+++ b/test/run_filter.cxx
@@ -22,7 +22,7 @@
 #include "fs/Path.hxx"
 #include "AudioParser.hxx"
 #include "audio_format.h"
-#include "filter_plugin.h"
+#include "FilterPlugin.hxx"
 #include "PcmVolume.hxx"
 #include "mixer_control.h"
 #include "stdbin.h"
diff --git a/test/run_output.cxx b/test/run_output.cxx
index f76e6fc76..5b6d54a11 100644
--- a/test/run_output.cxx
+++ b/test/run_output.cxx
@@ -32,9 +32,9 @@
 extern "C" {
 #include "output_plugin.h"
 #include "output_internal.h"
-#include "filter_registry.h"
 }
 
+#include "FilterRegistry.hxx"
 #include "PlayerControl.hxx"
 #include "stdbin.h"