13 files changed, 15 insertions, 15 deletions
diff --git a/src/output/alsa_plugin.c b/src/output/alsa_plugin.c
index 3ad502ba2..536d399d1 100644
--- a/src/output/alsa_plugin.c
+++ b/src/output/alsa_plugin.c
@@ -108,7 +108,7 @@ alsa_data_free(struct alsa_data *ad)
 }
 
 static void
-alsa_configure(struct alsa_data *ad, struct config_param *param)
+alsa_configure(struct alsa_data *ad, const struct config_param *param)
 {
 	ad->device = config_dup_block_string(param, "device", NULL);
 
@@ -138,7 +138,7 @@ alsa_configure(struct alsa_data *ad, struct config_param *param)
 static void *
 alsa_init(G_GNUC_UNUSED struct audio_output *ao,
 	  G_GNUC_UNUSED const struct audio_format *audio_format,
-	  struct config_param *param)
+	  const struct config_param *param)
 {
 	/* no need for pthread_once thread-safety when reading config */
 	static int free_global_registered;
diff --git a/src/output/ao_plugin.c b/src/output/ao_plugin.c
index f24805de0..10ce9c9de 100644
--- a/src/output/ao_plugin.c
+++ b/src/output/ao_plugin.c
@@ -77,7 +77,7 @@ static void audioOutputAo_error(const char *msg)
 static void *
 audioOutputAo_initDriver(struct audio_output *ao,
 			 G_GNUC_UNUSED const struct audio_format *audio_format,
-			 struct config_param *param)
+			 const struct config_param *param)
 {
 	ao_info *ai;
 	AoData *ad = newAoData();
diff --git a/src/output/fifo_plugin.c b/src/output/fifo_plugin.c
index 5d1f287b2..b0c6d12f4 100644
--- a/src/output/fifo_plugin.c
+++ b/src/output/fifo_plugin.c
@@ -161,7 +161,7 @@ static bool openFifo(FifoData *fd)
 
 static void *fifo_initDriver(G_GNUC_UNUSED struct audio_output *ao,
 			     G_GNUC_UNUSED const struct audio_format *audio_format,
-			     struct config_param *param)
+			     const struct config_param *param)
 {
 	FifoData *fd;
 	char *value, *path;
diff --git a/src/output/jack_plugin.c b/src/output/jack_plugin.c
index 185f73860..8d09dd1d9 100644
--- a/src/output/jack_plugin.c
+++ b/src/output/jack_plugin.c
@@ -183,7 +183,7 @@ mpd_jack_error(const char *msg)
 static void *
 mpd_jack_init(struct audio_output *ao,
 	      G_GNUC_UNUSED const struct audio_format *audio_format,
-	      struct config_param *param)
+	      const struct config_param *param)
 {
 	struct jack_data *jd;
 	const char *value;
diff --git a/src/output/mvp_plugin.c b/src/output/mvp_plugin.c
index cc3d53ae2..cf63faf08 100644
--- a/src/output/mvp_plugin.c
+++ b/src/output/mvp_plugin.c
@@ -112,7 +112,7 @@ static bool mvp_testDefault(void)
 
 static void *mvp_initDriver(G_GNUC_UNUSED struct audio_output *audio_output,
 			    G_GNUC_UNUSED const struct audio_format *audio_format,
-			    G_GNUC_UNUSED struct config_param *param)
+			    G_GNUC_UNUSED const struct config_param *param)
 {
 	MvpData *md = g_new(MvpData, 1);
 	md->audio_output = audio_output;
diff --git a/src/output/null_plugin.c b/src/output/null_plugin.c
index 7530a20cc..1ae55ca9b 100644
--- a/src/output/null_plugin.c
+++ b/src/output/null_plugin.c
@@ -32,7 +32,7 @@ struct null_data {
 static void *
 null_init(G_GNUC_UNUSED struct audio_output *audio_output,
 	  G_GNUC_UNUSED const struct audio_format *audio_format,
-	  G_GNUC_UNUSED struct config_param *param)
+	  G_GNUC_UNUSED const struct config_param *param)
 {
 	struct null_data *nd = g_new(struct null_data, 1);
 
diff --git a/src/output/oss_plugin.c b/src/output/oss_plugin.c
index e83a05c5a..b27aa1b77 100644
--- a/src/output/oss_plugin.c
+++ b/src/output/oss_plugin.c
@@ -344,7 +344,7 @@ static bool oss_testDefault(void)
 	return false;
 }
 
-static void *oss_open_default(struct config_param *param)
+static void *oss_open_default(const struct config_param *param)
 {
 	int i;
 	int err[G_N_ELEMENTS(default_devices)];
@@ -390,7 +390,7 @@ static void *oss_open_default(struct config_param *param)
 static void *
 oss_initDriver(G_GNUC_UNUSED struct audio_output *audioOutput,
 	       G_GNUC_UNUSED const struct audio_format *audio_format,
-	       struct config_param *param)
+	       const struct config_param *param)
 {
 	if (param) {
 		const char *device =
diff --git a/src/output/osx_plugin.c b/src/output/osx_plugin.c
index 8afd2a934..44a87f9d3 100644
--- a/src/output/osx_plugin.c
+++ b/src/output/osx_plugin.c
@@ -83,7 +83,7 @@ static bool osx_testDefault(void)
 static void *
 osx_initDriver(G_GNUC_UNUSED struct audio_output *audioOutput,
 	       G_GNUC_UNUSED const struct audio_format *audio_format,
-	       G_GNUC_UNUSED struct config_param *param)
+	       G_GNUC_UNUSED const struct config_param *param)
 {
 	return newOsxData();
 }
diff --git a/src/output/pulse_plugin.c b/src/output/pulse_plugin.c
index 45710b4a9..559d2ee56 100644
--- a/src/output/pulse_plugin.c
+++ b/src/output/pulse_plugin.c
@@ -55,7 +55,7 @@ static void pulse_free_data(struct pulse_data *pd)
 static void *
 pulse_init(struct audio_output *ao,
 	   G_GNUC_UNUSED const struct audio_format *audio_format,
-	   struct config_param *param)
+	   const struct config_param *param)
 {
 	struct pulse_data *pd;
 
diff --git a/src/output/shout_plugin.c b/src/output/shout_plugin.c
index 7d3e4aaf0..2217bc56e 100644
--- a/src/output/shout_plugin.c
+++ b/src/output/shout_plugin.c
@@ -94,7 +94,7 @@ static void free_shout_data(struct shout_data *sd)
 
 static void *my_shout_init_driver(struct audio_output *audio_output,
 				  const struct audio_format *audio_format,
-				  struct config_param *param)
+				  const struct config_param *param)
 {
 	struct shout_data *sd;
 	char *test;
diff --git a/src/output_api.h b/src/output_api.h
index 914eb2ede..b3c13335c 100644
--- a/src/output_api.h
+++ b/src/output_api.h
@@ -60,7 +60,7 @@ struct audio_output_plugin {
 	 */
 	void *(*init)(struct audio_output *ao,
 		      const struct audio_format *audio_format,
-		      struct config_param *param);
+		      const struct config_param *param);
 
 	/**
 	 * Free resources allocated by this device.
diff --git a/src/output_control.h b/src/output_control.h
index b84fcf07a..603d2ac00 100644
--- a/src/output_control.h
+++ b/src/output_control.h
@@ -29,7 +29,7 @@ struct tag;
 struct config_param;
 
 int
-audio_output_init(struct audio_output *, struct config_param *param);
+audio_output_init(struct audio_output *, const struct config_param *param);
 
 bool
 audio_output_open(struct audio_output *audioOutput,
diff --git a/src/output_init.c b/src/output_init.c
index a0c75a5da..6d974bdb8 100644
--- a/src/output_init.c
+++ b/src/output_init.c
@@ -39,7 +39,7 @@
 }
 
 int
-audio_output_init(struct audio_output *ao, struct config_param *param)
+audio_output_init(struct audio_output *ao, const struct config_param *param)
 {
 	const char *name = NULL;
 	char *format = NULL;