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diff --git a/src/pipewire/impl-factory.h b/src/pipewire/impl-factory.h
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+/* PipeWire
+ *
+ * Copyright © 2018 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef PIPEWIRE_IMPL_FACTORY_H
+#define PIPEWIRE_IMPL_FACTORY_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** \defgroup pw_impl_factory Factory Impl
+ *
+ * The factory is used to make objects on demand.
+ */
+
+/**
+ * \addtogroup pw_impl_factory
+ * \{
+ */
+struct pw_impl_factory;
+
+#include <pipewire/context.h>
+#include <pipewire/impl-client.h>
+#include <pipewire/global.h>
+#include <pipewire/properties.h>
+#include <pipewire/resource.h>
+
+/** Factory events, listen to them with \ref pw_impl_factory_add_listener */
+struct pw_impl_factory_events {
+#define PW_VERSION_IMPL_FACTORY_EVENTS	0
+	uint32_t version;
+
+	/** the factory is destroyed */
+        void (*destroy) (void *data);
+	/** the factory is freed */
+        void (*free) (void *data);
+	/** the factory is initialized */
+        void (*initialized) (void *data);
+};
+
+struct pw_impl_factory_implementation {
+#define PW_VERSION_IMPL_FACTORY_IMPLEMENTATION	0
+	uint32_t version;
+
+	/** The function to create an object from this factory */
+	void *(*create_object) (void *data,
+				struct pw_resource *resource,
+				const char *type,
+				uint32_t version,
+				struct pw_properties *properties,
+				uint32_t new_id);
+};
+
+struct pw_impl_factory *pw_context_create_factory(struct pw_context *context,
+				  const char *name,
+				  const char *type,
+				  uint32_t version,
+				  struct pw_properties *properties,
+				  size_t user_data_size);
+
+/** Get the factory properties */
+const struct pw_properties *pw_impl_factory_get_properties(struct pw_impl_factory *factory);
+
+/** Get the factory info */
+const struct pw_factory_info *pw_impl_factory_get_info(struct pw_impl_factory *factory);
+
+/** Update the factory properties */
+int pw_impl_factory_update_properties(struct pw_impl_factory *factory, const struct spa_dict *dict);
+
+int pw_impl_factory_register(struct pw_impl_factory *factory,
+			struct pw_properties *properties);
+
+void pw_impl_factory_destroy(struct pw_impl_factory *factory);
+
+void *pw_impl_factory_get_user_data(struct pw_impl_factory *factory);
+
+/** Get the global of this factory */
+struct pw_global *pw_impl_factory_get_global(struct pw_impl_factory *factory);
+
+/** Add an event listener */
+void pw_impl_factory_add_listener(struct pw_impl_factory *factory,
+			     struct spa_hook *listener,
+			     const struct pw_impl_factory_events *events,
+			     void *data);
+
+void pw_impl_factory_set_implementation(struct pw_impl_factory *factory,
+				   const struct pw_impl_factory_implementation *implementation,
+				   void *data);
+
+void *pw_impl_factory_create_object(struct pw_impl_factory *factory,
+			       struct pw_resource *resource,
+			       const char *type,
+			       uint32_t version,
+			       struct pw_properties *properties,
+			       uint32_t new_id);
+
+/** Find a factory by name */
+struct pw_impl_factory *
+pw_context_find_factory(struct pw_context *context	/**< the context */,
+		     const char *name			/**< the factory name */);
+
+/**
+ * \}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PIPEWIRE_IMPL_FACTORY_H */