Add missing files

src/extensions/metadata.h

@@ -0,0 +1,100 @@
+/* PipeWire
+ *
+ * Copyright © 2019 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_EXT_METADATA_H
+#define PIPEWIRE_EXT_METADATA_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <spa/utils/defs.h>
+
+struct pw_metadata { struct spa_interface iface; };
+
+#define PW_VERSION_METADATA			3
+
+#define PW_EXTENSION_MODULE_METADATA		PIPEWIRE_MODULE_PREFIX "module-metadata"
+
+#define PW_METADATA_EVENT_PROPERTY		0
+#define PW_METADATA_EVENT_NUM			1
+
+/** \ref pw_metadata events */
+struct pw_metadata_events {
+#define PW_VERSION_METADATA_EVENTS		0
+	uint32_t version;
+
+	int (*property) (void *object,
+			uint32_t subject,
+			const char *key,
+			const char *type,
+			const char *value);
+};
+
+#define PW_METADATA_METHOD_ADD_LISTENER		0
+#define PW_METADATA_METHOD_SET_PROPERTY		1
+#define PW_METADATA_METHOD_CLEAR		2
+#define PW_METADATA_METHOD_NUM			3
+
+/** \ref pw_metadata methods */
+struct pw_metadata_methods {
+#define PW_VERSION_METADATA_METHODS		0
+	uint32_t version;
+
+	int (*add_listener) (void *object,
+			struct spa_hook *listener,
+			const struct pw_metadata_events *events,
+			void *data);
+
+	int (*set_property) (void *object,
+			uint32_t subject,
+			const char *key,
+			const char *type,
+			const char *value);
+
+	int (*clear) (void *object);
+};
+
+
+#define pw_metadata_method(o,method,version,...)			\
+({									\
+	int _res = -ENOTSUP;						\
+	struct pw_metadata *_p = o;					\
+	spa_interface_call_res(&_p->iface,				\
+			struct pw_metadata_methods, _res,		\
+			method, version, ##__VA_ARGS__);		\
+	_res;								\
+})
+
+#define pw_metadata_add_listener(c,...)		pw_metadata_method(c,add_listener,0,__VA_ARGS__)
+#define pw_metadata_set_property(c,...)		pw_metadata_method(c,set_property,0,__VA_ARGS__)
+#define pw_metadata_clear(c)			pw_metadata_method(c,clear,0)
+
+#define PW_KEY_METADATA_NAME		"metadata.name"
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* PIPEWIRE_EXT_METADATA_H */