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diff --git a/src/pipewire/impl-device.h b/src/pipewire/impl-device.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_DEVICE_H
+#define PIPEWIRE_IMPL_DEVICE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** \defgroup pw_impl_device Device Impl
+ *
+ * The device is an object that manages nodes. It typically
+ * corresponds to a physical hardware device but it does not
+ * have to be.
+ *
+ * The purpose of the device is to provide an interface to
+ * dynamically create/remove/configure the nodes it manages.
+ */
+
+/**
+ * \addtogroup pw_impl_device
+ * \{
+ */
+struct pw_impl_device;
+
+#include <spa/monitor/device.h>
+
+#include <pipewire/context.h>
+#include <pipewire/global.h>
+#include <pipewire/properties.h>
+#include <pipewire/resource.h>
+
+/** Device events, listen to them with \ref pw_impl_device_add_listener */
+struct pw_impl_device_events {
+#define PW_VERSION_IMPL_DEVICE_EVENTS	0
+	uint32_t version;
+
+	/** the device is destroyed */
+        void (*destroy) (void *data);
+	/** the device is freed */
+        void (*free) (void *data);
+	/** the device is initialized */
+        void (*initialized) (void *data);
+
+	/** the device info changed */
+	void (*info_changed) (void *data, const struct pw_device_info *info);
+};
+
+struct pw_impl_device *pw_context_create_device(struct pw_context *context,
+				struct pw_properties *properties,
+				size_t user_data_size);
+
+int pw_impl_device_register(struct pw_impl_device *device,
+		       struct pw_properties *properties);
+
+void pw_impl_device_destroy(struct pw_impl_device *device);
+
+void *pw_impl_device_get_user_data(struct pw_impl_device *device);
+
+/** Set the device implementation */
+int pw_impl_device_set_implementation(struct pw_impl_device *device, struct spa_device *spa_device);
+/** Get the device implementation */
+struct spa_device *pw_impl_device_get_implementation(struct pw_impl_device *device);
+
+/** Get the global of this device */
+struct pw_global *pw_impl_device_get_global(struct pw_impl_device *device);
+
+/** Add an event listener */
+void pw_impl_device_add_listener(struct pw_impl_device *device,
+			    struct spa_hook *listener,
+			    const struct pw_impl_device_events *events,
+			    void *data);
+
+int pw_impl_device_update_properties(struct pw_impl_device *device, const struct spa_dict *dict);
+
+const struct pw_properties *pw_impl_device_get_properties(struct pw_impl_device *device);
+
+int pw_impl_device_for_each_param(struct pw_impl_device *device,
+			     int seq, uint32_t param_id,
+			     uint32_t index, uint32_t max,
+			     const struct spa_pod *filter,
+			     int (*callback) (void *data, int seq,
+					      uint32_t id, uint32_t index, uint32_t next,
+					      struct spa_pod *param),
+			     void *data);
+/**
+ * \}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PIPEWIRE_IMPL_DEVICE_H */