add const to spa_event and spa_command

spa/include/spa/monitor/device.h

@@ -100,7 +100,7 @@ struct spa_device_events {
 	void (*result) (void *data, int seq, int res, const void *result);
 
 	/** a device event */
-	void (*event) (void *data, struct spa_event *event);
+	void (*event) (void *data, const struct spa_event *event);
 
 	/** info changed for an object managed by the device, info is NULL when
 	 * the object is removed */

spa/include/spa/monitor/monitor.h

@@ -84,7 +84,7 @@ struct spa_monitor_callbacks {
 	int (*info) (void *data, const struct spa_dict *info);
 
 	/** an item is added/removed/changed on the monitor */
-	int (*event) (void *data, struct spa_event *event);
+	int (*event) (void *data, const struct spa_event *event);
 };
 
 /**

spa/include/spa/node/node.h

@@ -168,7 +168,7 @@ struct spa_node_events {
 	 * This will be called when an out-of-bound event is notified
 	 * on \a node.
 	 */
-	void (*event) (void *data, struct spa_event *event);
+	void (*event) (void *data, const struct spa_event *event);
 };
 
 /** Node callbacks

spa/tools/spa-monitor.c

@@ -67,7 +67,7 @@ static int on_monitor_info(void *_data, const struct spa_dict *info)
 	return 0;
 }
 
-static int on_monitor_event(void *_data, struct spa_event *event)
+static int on_monitor_event(void *_data, const struct spa_event *event)
 {
 	struct data *data = _data;
 

src/extensions/client-node.h

@@ -284,7 +284,7 @@ struct pw_client_node_proxy_methods {
 	 * Send an event to the node
 	 * \param event the event to send
 	 */
-	int (*event) (void *object, struct spa_event *event);
+	int (*event) (void *object, const struct spa_event *event);
 };
 
 

src/modules/module-client-node/client-node.c

@@ -1089,7 +1089,7 @@ static int client_node_set_active(void *data, bool active)
 	return pw_node_set_active(impl->this.node, active);
 }
 
-static int client_node_event(void *data, struct spa_event *event)
+static int client_node_event(void *data, const struct spa_event *event)
 {
 	struct impl *impl = data;
 	struct node *this = &impl->node;

src/modules/module-client-node/protocol-native.c

@@ -223,7 +223,7 @@ static int client_node_marshal_set_active(void *object, bool active)
 	return pw_protocol_native_end_proxy(proxy, b);
 }
 
-static int client_node_marshal_event_method(void *object, struct spa_event *event)
+static int client_node_marshal_event_method(void *object, const struct spa_event *event)
 {
 	struct pw_proxy *proxy = object;
 	struct spa_pod_builder *b;
@@ -1007,7 +1007,7 @@ static int client_node_demarshal_event_method(void *object, const struct pw_prot
 {
 	struct pw_resource *resource = object;
 	struct spa_pod_parser prs;
-	struct spa_event *event;
+	const struct spa_event *event;
 
 	spa_pod_parser_init(&prs, msg->data, msg->size);
 	if (spa_pod_parser_get_struct(&prs,

src/modules/module-protocol-native/protocol-native.c

@@ -1186,7 +1186,7 @@ static int node_demarshal_send_command(void *object, const struct pw_protocol_na
 {
 	struct pw_resource *resource = object;
 	struct spa_pod_parser prs;
-	struct spa_command *command;
+	const struct spa_command *command;
 
 	spa_pod_parser_init(&prs, msg->data, msg->size);
 	if (spa_pod_parser_get_struct(&prs,

src/modules/spa/spa-monitor.c

@@ -264,7 +264,7 @@ static void change_item(struct pw_spa_monitor *this, struct spa_pod *item, uint6
 	}
 }
 
-static int on_monitor_event(void *data, struct spa_event *event)
+static int on_monitor_event(void *data, const struct spa_event *event)
 {
 	struct impl *impl = data;
 	struct pw_spa_monitor *this = &impl->this;

src/pipewire/node.c

@@ -997,7 +997,7 @@ static void node_result(void *data, int seq, int res, const void *result)
 	pw_node_emit_result(node, seq, res, result);
 }
 
-static void node_event(void *data, struct spa_event *event)
+static void node_event(void *data, const struct spa_event *event)
 {
 	struct pw_node *node = data;
 	struct impl *impl = SPA_CONTAINER_OF(node, struct impl, this);