device: add device object

Make a device object, let the v4l2 monitor create device objects
The device object is responsible for dynamically creating nodes.

src/modules/spa/spa-device.h

@@ -0,0 +1,70 @@
+/* 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_SPA_DEVICE_H__
+#define __PIPEWIRE_SPA_DEVICE_H__
+
+#include <spa/monitor/device.h>
+
+#include <pipewire/core.h>
+#include <pipewire/device.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum pw_spa_device_flags {
+	PW_SPA_DEVICE_FLAG_DISABLE	= (1 << 0),
+	PW_SPA_DEVICE_FLAG_NO_REGISTER	= (1 << 1),
+};
+
+struct pw_device *
+pw_spa_device_new(struct pw_core *core,
+		  struct pw_client *owner,	/**< optional owner */
+		  struct pw_global *parent,	/**< optional parent */
+		  const char *name,
+		  enum pw_spa_device_flags flags,
+		  struct spa_device *device,
+		  struct spa_handle *handle,
+		  struct pw_properties *properties,
+		  size_t user_data_size);
+
+struct pw_device *
+pw_spa_device_load(struct pw_core *core,
+		   struct pw_client *owner,	/**< optional owner */
+		   struct pw_global *parent,	/**< optional parent */
+		   const char *lib,
+		   const char *factory_name,
+		   const char *name,
+		   enum pw_spa_device_flags flags,
+		   struct pw_properties *properties,
+		   size_t user_data_size);
+
+void *pw_spa_device_get_user_data(struct pw_device *device);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __PIPEWIRE_SPA_DEVICE_H__ */