client-device: add client device

Make it possible to implement a device out-of-process

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

@@ -0,0 +1,520 @@
+/* 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.
+ */
+
+#include <errno.h>
+
+#include <spa/pod/parser.h>
+
+#include <pipewire/pipewire.h>
+
+#include <extensions/protocol-native.h>
+
+#if 0
+static void push_dict(struct spa_pod_builder *b, const struct spa_dict *dict)
+{
+	uint32_t i, n_items;
+	struct spa_pod_frame f;
+
+	n_items = dict ? dict->n_items : 0;
+
+	spa_pod_builder_push_struct(b, &f);
+	spa_pod_builder_int(b, n_items);
+	for (i = 0; i < n_items; i++) {
+		spa_pod_builder_string(b, dict->items[i].key);
+		spa_pod_builder_string(b, dict->items[i].value);
+	}
+	spa_pod_builder_pop(b, &f);
+}
+#endif
+
+static int device_marshal_add_listener(void *object,
+			struct spa_hook *listener,
+			const struct spa_device_events *events,
+			void *data)
+{
+	return -ENOTSUP;
+}
+
+static int device_demarshal_add_listener(void *object,
+			const struct pw_protocol_native_message *msg)
+{
+	return -ENOTSUP;
+}
+
+static int device_marshal_enum_params(void *object, int seq,
+                            uint32_t id, uint32_t index, uint32_t max,
+                            const struct spa_pod *filter)
+{
+	struct pw_protocol_native_message *msg;
+	struct pw_resource *resource = object;
+	struct spa_pod_builder *b;
+	struct spa_pod_frame f[2];
+
+	b = pw_protocol_native_begin_resource(resource, SPA_DEVICE_METHOD_ENUM_PARAMS, &msg);
+
+	spa_pod_builder_push_struct(b, &f[0]);
+	spa_pod_builder_add(b,
+			SPA_POD_Int(SPA_RESULT_RETURN_ASYNC(msg->seq)),
+			SPA_POD_Id(id),
+			SPA_POD_Int(index),
+			SPA_POD_Int(max),
+			SPA_POD_Pod(filter), NULL);
+	spa_pod_builder_pop(b, &f[0]);
+
+	return pw_protocol_native_end_resource(resource, b);
+}
+
+static int device_demarshal_enum_params(void *object, const struct pw_protocol_native_message *msg)
+{
+	struct pw_proxy *proxy = object;
+	struct spa_pod_parser prs;
+	uint32_t id, index, max;
+	int seq;
+	struct spa_pod *filter;
+
+	spa_pod_parser_init(&prs, msg->data, msg->size);
+	if (spa_pod_parser_get_struct(&prs,
+			SPA_POD_Int(&seq),
+			SPA_POD_Id(&id),
+			SPA_POD_Int(&index),
+			SPA_POD_Int(&max),
+			SPA_POD_Pod(&filter)) < 0)
+		return -EINVAL;
+
+	pw_proxy_notify(proxy, struct spa_device_methods, enum_params, 0,
+					seq, id, index, max, filter);
+	return 0;
+}
+
+static int device_marshal_set_param(void *object,
+                            uint32_t id, uint32_t flags,
+                            const struct spa_pod *param)
+{
+	struct pw_resource *resource = object;
+	struct spa_pod_builder *b;
+	struct spa_pod_frame f[2];
+
+	b = pw_protocol_native_begin_resource(resource, SPA_DEVICE_METHOD_SET_PARAM, NULL);
+
+	spa_pod_builder_push_struct(b, &f[0]);
+	spa_pod_builder_add(b,
+			SPA_POD_Id(id),
+			SPA_POD_Int(flags),
+			SPA_POD_Pod(param), NULL);
+	spa_pod_builder_pop(b, &f[0]);
+
+	return pw_protocol_native_end_resource(resource, b);
+}
+
+static int device_demarshal_set_param(void *object, const struct pw_protocol_native_message *msg)
+{
+	struct pw_proxy *proxy = object;
+	struct spa_pod_parser prs;
+	uint32_t id, flags;
+	struct spa_pod *param;
+
+	spa_pod_parser_init(&prs, msg->data, msg->size);
+	if (spa_pod_parser_get_struct(&prs,
+			SPA_POD_Id(&id),
+			SPA_POD_Int(&flags),
+			SPA_POD_Pod(&param)) < 0)
+		return -EINVAL;
+
+	pw_proxy_notify(proxy, struct spa_device_methods, set_param, 0,
+					id, flags, param);
+	return 0;
+}
+
+static void device_marshal_info(void *object,
+		const struct spa_device_info *info)
+{
+	struct pw_proxy *proxy = object;
+	struct spa_pod_builder *b;
+	struct spa_pod_frame f[2];
+	uint32_t i, n_items;
+
+	b = pw_protocol_native_begin_proxy(proxy, SPA_DEVICE_EVENT_INFO, NULL);
+
+	spa_pod_builder_push_struct(b, &f[0]);
+	if (info) {
+		uint64_t change_mask = info->change_mask;
+
+		change_mask &= SPA_DEVICE_CHANGE_MASK_FLAGS |
+				SPA_DEVICE_CHANGE_MASK_PROPS |
+				SPA_DEVICE_CHANGE_MASK_PARAMS;
+
+		n_items = info->props ? info->props->n_items : 0;
+
+		spa_pod_builder_push_struct(b, &f[1]);
+		spa_pod_builder_add(b,
+			    SPA_POD_Long(change_mask),
+			    SPA_POD_Long(info->flags),
+			    SPA_POD_Int(n_items), NULL);
+		for (i = 0; i < n_items; i++) {
+			spa_pod_builder_add(b,
+					    SPA_POD_String(info->props->items[i].key),
+					    SPA_POD_String(info->props->items[i].value), NULL);
+		}
+		spa_pod_builder_add(b,
+				    SPA_POD_Int(info->n_params), NULL);
+		for (i = 0; i < info->n_params; i++) {
+			spa_pod_builder_add(b,
+					    SPA_POD_Id(info->params[i].id),
+					    SPA_POD_Int(info->params[i].flags), NULL);
+		}
+		spa_pod_builder_pop(b, &f[1]);
+	} else {
+		spa_pod_builder_add(b,
+				SPA_POD_Pod(NULL), NULL);
+	}
+	spa_pod_builder_pop(b, &f[0]);
+
+	pw_protocol_native_end_proxy(proxy, b);
+}
+
+static int device_demarshal_info(void *object,
+		const struct pw_protocol_native_message *msg)
+{
+	struct pw_resource *resource = object;
+	struct spa_pod_parser prs;
+	struct spa_pod *ipod;
+	struct spa_device_info info = SPA_DEVICE_INFO_INIT(), *infop;
+	struct spa_dict props;
+	uint32_t i;
+
+	spa_pod_parser_init(&prs, msg->data, msg->size);
+
+	if (spa_pod_parser_get_struct(&prs,
+			SPA_POD_PodStruct(&ipod)) < 0)
+		return -EINVAL;
+
+	if (ipod) {
+		struct spa_pod_parser p2;
+		struct spa_pod_frame f2;
+		infop = &info;
+
+		spa_pod_parser_pod(&p2, ipod);
+		if (spa_pod_parser_push_struct(&p2, &f2) < 0 ||
+		    spa_pod_parser_get(&p2,
+				SPA_POD_Long(&info.change_mask),
+				SPA_POD_Long(&info.flags),
+				SPA_POD_Int(&props.n_items), NULL) < 0)
+			return -EINVAL;
+
+		info.change_mask &= SPA_DEVICE_CHANGE_MASK_FLAGS |
+				SPA_DEVICE_CHANGE_MASK_PROPS |
+				SPA_DEVICE_CHANGE_MASK_PARAMS;
+
+		if (props.n_items > 0) {
+			info.props = &props;
+
+			props.items = alloca(props.n_items * sizeof(struct spa_dict_item));
+			for (i = 0; i < props.n_items; i++) {
+				if (spa_pod_parser_get(&p2,
+						SPA_POD_String(&props.items[i].key),
+						SPA_POD_String(&props.items[i].value), NULL) < 0)
+					return -EINVAL;
+			}
+		}
+		if (spa_pod_parser_get(&p2,
+				SPA_POD_Int(&info.n_params), NULL) < 0)
+			return -EINVAL;
+
+		if (info.n_params > 0) {
+			info.params = alloca(info.n_params * sizeof(struct spa_param_info));
+			for (i = 0; i < info.n_params; i++) {
+				if (spa_pod_parser_get(&p2,
+						SPA_POD_Id(&info.params[i].id),
+						SPA_POD_Int(&info.params[i].flags), NULL) < 0)
+					return -EINVAL;
+			}
+		}
+	}
+	else {
+		infop = NULL;
+	}
+	pw_resource_do(resource, struct spa_device_events, info, 0, infop);
+	return 0;
+}
+
+static void device_marshal_result(void *object,
+		int seq, int res, uint32_t type, const void *result)
+{
+	struct pw_proxy *proxy = object;
+	struct spa_pod_builder *b;
+	struct spa_pod_frame f[2];
+
+	b = pw_protocol_native_begin_proxy(proxy, SPA_DEVICE_EVENT_RESULT, NULL);
+	spa_pod_builder_push_struct(b, &f[0]);
+	spa_pod_builder_add(b,
+			    SPA_POD_Int(seq),
+			    SPA_POD_Int(res),
+			    SPA_POD_Id(type),
+			    NULL);
+
+	switch (type) {
+	case SPA_RESULT_TYPE_DEVICE_PARAMS:
+	{
+		const struct spa_result_device_params *r = result;
+		spa_pod_builder_add(b,
+			    SPA_POD_Id(r->id),
+			    SPA_POD_Int(r->index),
+			    SPA_POD_Int(r->next),
+			    SPA_POD_Pod(r->param),
+			    NULL);
+		break;
+	}
+	default:
+		break;
+	}
+
+	spa_pod_builder_pop(b, &f[0]);
+
+	pw_protocol_native_end_proxy(proxy, b);
+}
+
+static int device_demarshal_result(void *object,
+		const struct pw_protocol_native_message *msg)
+{
+	struct pw_resource *resource = object;
+	struct spa_pod_parser prs;
+	struct spa_pod_frame f[1];
+	int seq, res;
+	uint32_t type;
+	const void *result;
+	struct spa_result_device_params params;
+
+	spa_pod_parser_init(&prs, msg->data, msg->size);
+	if (spa_pod_parser_push_struct(&prs, &f[0]) < 0 ||
+	    spa_pod_parser_get(&prs,
+			SPA_POD_Int(&seq),
+			SPA_POD_Int(&res),
+			SPA_POD_Id(&type),
+			NULL) < 0)
+		return -EINVAL;
+
+	switch (type) {
+	case SPA_RESULT_TYPE_DEVICE_PARAMS:
+		if (spa_pod_parser_get(&prs,
+				SPA_POD_Id(&params.id),
+				SPA_POD_Int(&params.index),
+				SPA_POD_Int(&params.next),
+				SPA_POD_PodObject(&params.param),
+				NULL) < 0)
+			return -EINVAL;
+
+		result = &params;
+		break;
+
+	default:
+		result = NULL;
+		break;
+	}
+
+	pw_resource_do(resource, struct spa_device_events, result, 0, seq, res, type, result);
+	return 0;
+}
+
+static void device_marshal_event(void *object, const struct spa_event *event)
+{
+	struct pw_proxy *proxy = object;
+	struct spa_pod_builder *b;
+	struct spa_pod_frame f[2];
+
+	b = pw_protocol_native_begin_proxy(proxy, SPA_DEVICE_EVENT_RESULT, NULL);
+	spa_pod_builder_push_struct(b, &f[0]);
+	spa_pod_builder_add(b,
+			    SPA_POD_Pod(event),
+			    NULL);
+	spa_pod_builder_pop(b, &f[0]);
+
+	pw_protocol_native_end_proxy(proxy, b);
+}
+
+static int device_demarshal_event(void *object,
+		const struct pw_protocol_native_message *msg)
+{
+	struct pw_resource *resource = object;
+	struct spa_pod_parser prs;
+	struct spa_event *event;
+
+	spa_pod_parser_init(&prs, msg->data, msg->size);
+	if (spa_pod_parser_get_struct(&prs,
+			SPA_POD_PodObject(&event)) < 0)
+		return -EINVAL;
+
+	pw_resource_do(resource, struct spa_device_events, event, 0, event);
+	return 0;
+}
+
+static void device_marshal_object_info(void *object, uint32_t id,
+                const struct spa_device_object_info *info)
+{
+	struct pw_proxy *proxy = object;
+	struct spa_pod_builder *b;
+	struct spa_pod_frame f[2];
+	uint32_t i, n_items;
+
+	b = pw_protocol_native_begin_proxy(proxy, SPA_DEVICE_EVENT_OBJECT_INFO, NULL);
+	spa_pod_builder_push_struct(b, &f[0]);
+	spa_pod_builder_add(b,
+			    SPA_POD_Int(id),
+			    NULL);
+	if (info) {
+		uint64_t change_mask = info->change_mask;
+
+		change_mask &= SPA_DEVICE_OBJECT_CHANGE_MASK_FLAGS |
+				SPA_DEVICE_OBJECT_CHANGE_MASK_PROPS;
+
+		n_items = info->props ? info->props->n_items : 0;
+
+		spa_pod_builder_push_struct(b, &f[1]);
+		spa_pod_builder_add(b,
+			    SPA_POD_Id(info->type),
+			    SPA_POD_Long(change_mask),
+			    SPA_POD_Long(info->flags),
+			    SPA_POD_Int(n_items), NULL);
+		for (i = 0; i < n_items; i++) {
+			spa_pod_builder_add(b,
+					    SPA_POD_String(info->props->items[i].key),
+					    SPA_POD_String(info->props->items[i].value), NULL);
+		}
+		spa_pod_builder_pop(b, &f[1]);
+	} else {
+		spa_pod_builder_add(b,
+				SPA_POD_Pod(NULL), NULL);
+	}
+	spa_pod_builder_pop(b, &f[0]);
+
+	pw_protocol_native_end_proxy(proxy, b);
+}
+
+static int device_demarshal_object_info(void *object,
+		const struct pw_protocol_native_message *msg)
+{
+	struct pw_resource *resource = object;
+	struct spa_pod_parser prs;
+	struct spa_device_object_info info = SPA_DEVICE_OBJECT_INFO_INIT(), *infop;
+	struct spa_pod *ipod;
+	struct spa_dict props;
+	uint32_t i, id;
+
+	spa_pod_parser_init(&prs, msg->data, msg->size);
+	if (spa_pod_parser_get_struct(&prs,
+			SPA_POD_Int(&id),
+			SPA_POD_PodStruct(&ipod)) < 0)
+		return -EINVAL;
+
+	if (ipod) {
+		struct spa_pod_parser p2;
+		struct spa_pod_frame f2;
+		infop = &info;
+
+		spa_pod_parser_pod(&p2, ipod);
+		if (spa_pod_parser_push_struct(&p2, &f2) < 0 ||
+		    spa_pod_parser_get(&p2,
+				SPA_POD_Id(&info.type),
+				SPA_POD_Long(&info.change_mask),
+				SPA_POD_Long(&info.flags),
+				SPA_POD_Int(&props.n_items), NULL) < 0)
+			return -EINVAL;
+
+		info.change_mask &= SPA_DEVICE_OBJECT_CHANGE_MASK_FLAGS |
+				SPA_DEVICE_CHANGE_MASK_PROPS;
+
+		if (props.n_items > 0) {
+			info.props = &props;
+
+			props.items = alloca(props.n_items * sizeof(struct spa_dict_item));
+			for (i = 0; i < props.n_items; i++) {
+				if (spa_pod_parser_get(&p2,
+						SPA_POD_String(&props.items[i].key),
+						SPA_POD_String(&props.items[i].value), NULL) < 0)
+					return -EINVAL;
+			}
+		}
+	} else {
+		infop = NULL;
+	}
+
+	pw_resource_do(resource, struct spa_device_events, object_info, 0, id, infop);
+	return 0;
+}
+
+static const struct spa_device_methods pw_protocol_native_device_method_marshal = {
+	SPA_VERSION_DEVICE_METHODS,
+	.add_listener = &device_marshal_add_listener,
+	.enum_params = &device_marshal_enum_params,
+	.set_param = &device_marshal_set_param
+};
+
+static const struct pw_protocol_native_demarshal
+pw_protocol_native_device_method_demarshal[SPA_DEVICE_METHOD_NUM] =
+{
+	[SPA_DEVICE_METHOD_ADD_LISTENER] = { &device_demarshal_add_listener, 0 },
+	[SPA_DEVICE_METHOD_ENUM_PARAMS] = { &device_demarshal_enum_params, 0 },
+	[SPA_DEVICE_METHOD_SET_PARAM] = { &device_demarshal_set_param, 0 },
+};
+
+static const struct spa_device_events pw_protocol_native_device_event_marshal = {
+	SPA_VERSION_DEVICE_EVENTS,
+	.info = &device_marshal_info,
+	.result = &device_marshal_result,
+	.event = &device_marshal_event,
+	.object_info = &device_marshal_object_info,
+};
+
+static const struct pw_protocol_native_demarshal
+pw_protocol_native_device_event_demarshal[SPA_DEVICE_EVENT_NUM] =
+{
+	[SPA_DEVICE_EVENT_INFO] = { &device_demarshal_info, 0 },
+	[SPA_DEVICE_EVENT_RESULT] = { &device_demarshal_result, 0 },
+	[SPA_DEVICE_EVENT_EVENT] = { &device_demarshal_event, 0 },
+	[SPA_DEVICE_EVENT_OBJECT_INFO] = { &device_demarshal_object_info, 0 },
+};
+
+static const struct pw_protocol_marshal pw_protocol_native_client_device_marshal = {
+	SPA_TYPE_INTERFACE_Device,
+	SPA_VERSION_DEVICE,
+	SPA_DEVICE_EVENT_NUM,
+	SPA_DEVICE_METHOD_NUM,
+	&pw_protocol_native_device_event_marshal,
+	pw_protocol_native_device_event_demarshal,
+	&pw_protocol_native_device_method_marshal,
+	pw_protocol_native_device_method_demarshal,
+};
+
+struct pw_protocol *pw_protocol_native_ext_client_device_init(struct pw_core *core)
+{
+	struct pw_protocol *protocol;
+
+	protocol = pw_core_find_protocol(core, PW_TYPE_INFO_PROTOCOL_Native);
+
+	if (protocol == NULL)
+		return NULL;
+
+	pw_protocol_add_marshal(protocol, &pw_protocol_native_client_device_marshal);
+
+	return protocol;
+}

src/modules/module-client-device/proxy-device.c

@@ -0,0 +1,160 @@
+/* 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.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include <spa/pod/parser.h>
+#include <spa/monitor/device.h>
+
+#include "pipewire/pipewire.h"
+#include "pipewire/private.h"
+
+struct device_data {
+	struct pw_remote *remote;
+	struct pw_core *core;
+
+	struct spa_device *device;
+	struct spa_hook device_listener;
+	struct spa_hook device_methods;
+
+        struct pw_proxy *proxy;
+	struct spa_hook proxy_listener;
+};
+
+#define pw_device_proxy_event(o,method,version,...)			\
+({									\
+        int _res = -ENOTSUP;						\
+        struct spa_interface *_p = o;                                   \
+        spa_interface_call_res(&_p->iface,                              \
+                        struct pw_core_proxy_methods, _res,             \
+                        method, version, ##__VA_ARGS__);                \
+        _res;                                                           \
+})
+
+static void device_event_info(void *_data, const struct spa_device_info *info)
+{
+	struct device_data *data = _data;
+	struct spa_interface *iface = (struct spa_interface*)data->proxy;
+	pw_log_debug("%p", data);
+        spa_interface_call(iface, struct spa_device_events, info, 0, info);
+}
+
+static void device_event_result(void *_data, int seq, int res, uint32_t type, const void *result)
+{
+	struct device_data *data = _data;
+	struct spa_interface *iface = (struct spa_interface*)data->proxy;
+	pw_log_debug("%p", data);
+        spa_interface_call(iface, struct spa_device_events, result, 0, seq, res, type, result);
+}
+
+static void device_event_event(void *_data, const struct spa_event *event)
+{
+	struct device_data *data = _data;
+	struct spa_interface *iface = (struct spa_interface*)data->proxy;
+	pw_log_debug("%p", data);
+        spa_interface_call(iface, struct spa_device_events, event, 0, event);
+}
+
+static void device_event_object_info(void *_data, uint32_t id,
+                const struct spa_device_object_info *info)
+{
+	struct device_data *data = _data;
+	struct spa_interface *iface = (struct spa_interface*)data->proxy;
+	pw_log_debug("%p", data);
+        spa_interface_call(iface, struct spa_device_events, object_info, 0, id, info);
+}
+
+static const struct spa_device_events device_events = {
+	SPA_VERSION_DEVICE_EVENTS,
+	.info = device_event_info,
+	.result = device_event_result,
+	.event = device_event_event,
+	.object_info = device_event_object_info,
+};
+
+static int device_method_enum_params(void *object, int seq,
+                            uint32_t id, uint32_t index, uint32_t max,
+                            const struct spa_pod *filter)
+{
+	struct device_data *data = object;
+	pw_log_debug("%p", data);
+	return spa_device_enum_params(data->device, seq, id, index, max, filter);
+}
+
+static int device_method_set_param(void *object,
+                          uint32_t id, uint32_t flags,
+                          const struct spa_pod *param)
+{
+	struct device_data *data = object;
+	pw_log_debug("%p", data);
+	return spa_device_set_param(data->device, id, flags, param);
+}
+
+static const struct spa_device_methods device_methods = {
+	SPA_VERSION_DEVICE_METHODS,
+	.enum_params = device_method_enum_params,
+	.set_param = device_method_set_param,
+};
+
+static void device_proxy_destroy(void *_data)
+{
+	struct device_data *data = _data;
+	spa_hook_remove(&data->device_listener);
+}
+
+static const struct pw_proxy_events proxy_events = {
+	PW_VERSION_PROXY_EVENTS,
+	.destroy = device_proxy_destroy,
+};
+
+struct pw_proxy *pw_remote_spa_device_export(struct pw_remote *remote,
+		uint32_t type, struct pw_properties *props, void *object)
+{
+	struct spa_device *device = object;
+	struct pw_proxy *proxy;
+	struct device_data *data;
+
+	proxy = pw_core_proxy_create_object(remote->core_proxy,
+					    "client-device",
+					    SPA_TYPE_INTERFACE_Device,
+					    SPA_VERSION_DEVICE,
+					    &props->dict,
+					    sizeof(struct device_data));
+        if (proxy == NULL)
+                return NULL;
+
+	data = pw_proxy_get_user_data(proxy);
+	data->remote = remote;
+	data->device = device;
+	data->core = pw_remote_get_core(remote);
+	data->proxy = proxy;
+
+	pw_proxy_add_listener(proxy, &data->proxy_listener, &proxy_events, data);
+	pw_proxy_add_proxy_listener(proxy, &data->device_methods, &device_methods, data);
+	spa_device_add_listener(device, &data->device_listener, &device_events, data);
+
+	return proxy;
+}

src/modules/module-client-device/resource-device.c

@@ -0,0 +1,219 @@
+/* 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.
+ */
+
+#include <string.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <time.h>
+#include <sys/eventfd.h>
+
+#include <spa/monitor/device.h>
+#include <spa/monitor/utils.h>
+#include <spa/pod/filter.h>
+#include <spa/pod/parser.h>
+#include <spa/debug/types.h>
+
+#include <pipewire/pipewire.h>
+#include "pipewire/private.h"
+
+struct impl {
+	struct pw_core *core;
+	struct pw_device *device;
+
+	struct spa_device impl;
+	struct spa_hook_list hooks;
+
+	struct pw_resource *resource;
+	struct spa_hook resource_listener;
+
+	struct pw_global *parent;
+	unsigned int registered:1;
+};
+
+#define pw_device_resource(r,m,v,...)      \
+        pw_resource_notify_res(r,struct spa_device_methods,m,v,__VA_ARGS__)
+
+#define pw_device_resource_enum_params(r,...)  \
+        pw_device_resource(r,enum_params,0,__VA_ARGS__)
+#define pw_device_resource_set_param(r,...)  \
+        pw_device_resource(r,set_param,0,__VA_ARGS__)
+
+static int device_add_listener(void *object,
+                        struct spa_hook *listener,
+                        const struct spa_device_events *events,
+                        void *data)
+{
+	struct impl *impl = object;
+        struct spa_hook_list save;
+
+        spa_hook_list_isolate(&impl->hooks, &save, listener, events, data);
+	pw_log_debug("client-device %p: add listener", impl);
+
+        spa_hook_list_join(&impl->hooks, &save);
+
+        return 0;
+}
+
+static int device_sync(void *object, int seq)
+{
+	struct impl *impl = object;
+
+	pw_log_debug("client-device %p: sync %d", impl, seq);
+
+	return pw_resource_ping(impl->resource, seq);
+}
+
+static int device_enum_params(void *object, int seq,
+                            uint32_t id, uint32_t index, uint32_t max,
+                            const struct spa_pod *filter)
+{
+	struct impl *impl = object;
+	pw_log_debug("client-device %p: enum params", impl);
+	return pw_device_resource_enum_params(impl->resource, seq, id, index, max, filter);
+}
+
+static int device_set_param(void *object,
+                          uint32_t id, uint32_t flags,
+                          const struct spa_pod *param)
+{
+	struct impl *impl = object;
+	pw_log_debug("client-device %p: set param", impl);
+	return pw_device_resource_set_param(impl->resource, id, flags, param);
+}
+
+static const struct spa_device_methods impl_device = {
+	SPA_VERSION_DEVICE_METHODS,
+	.add_listener = device_add_listener,
+	.sync = device_sync,
+	.enum_params = device_enum_params,
+	.set_param = device_set_param,
+};
+
+static void device_info(void *data, const struct spa_device_info *info)
+{
+	struct impl *impl = data;
+	spa_device_emit_info(&impl->hooks, info);
+
+	if (!impl->registered) {
+		pw_device_register(impl->device, impl->resource->client, impl->parent, NULL);
+		impl->registered = true;
+	}
+}
+
+static void device_result(void *data, int seq, int res, uint32_t type, const void *result)
+{
+	struct impl *impl = data;
+	pw_log_debug("client-device %p: result %d %d %u", impl, seq, res, type);
+	spa_device_emit_result(&impl->hooks, seq, res, type, result);
+}
+
+static void device_event(void *data, const struct spa_event *event)
+{
+	struct impl *impl = data;
+	spa_device_emit_event(&impl->hooks, event);
+}
+
+static void device_object_info(void *data, uint32_t id,
+                const struct spa_device_object_info *info)
+{
+	struct impl *impl = data;
+	spa_device_emit_object_info(&impl->hooks, id, info);
+}
+
+static const struct spa_device_events device_events = {
+	SPA_VERSION_DEVICE_EVENTS,
+	.info = device_info,
+	.result = device_result,
+	.event = device_event,
+	.object_info = device_object_info,
+};
+
+static void device_resource_destroy(void *data)
+{
+	struct impl *impl = data;
+	struct pw_device *device = impl->device;
+
+	pw_log_debug("client-device %p: destroy", impl);
+
+	impl->resource = NULL;
+	spa_hook_remove(&impl->resource_listener);
+
+	pw_device_destroy(device);
+}
+
+static void device_resource_pong(void *data, int seq)
+{
+	struct impl *impl = data;
+	spa_device_emit_result(&impl->hooks, seq, 0, 0, NULL);
+}
+
+static const struct pw_resource_events resource_events = {
+	PW_VERSION_RESOURCE_EVENTS,
+	.destroy = device_resource_destroy,
+	.pong = device_resource_pong,
+};
+
+struct pw_device *pw_client_device_new(struct pw_resource *resource,
+		struct pw_global *parent,
+		struct pw_properties *properties)
+{
+	struct impl *impl;
+	struct pw_device *device;
+	struct pw_client *client = pw_resource_get_client(resource);
+	struct pw_core *core = pw_client_get_core(client);
+	const char *name;
+
+	if ((name = pw_properties_get(properties, PW_KEY_DEVICE_NAME)) == NULL)
+		name = "client-device";
+
+	device = pw_device_new(core, name, properties, sizeof(struct impl));
+	if (device == NULL)
+		return NULL;
+
+	impl = pw_device_get_user_data(device);
+	impl->device = device;
+	impl->core = core;
+	impl->resource = resource;
+	impl->parent = parent;
+
+	impl->impl.iface = SPA_INTERFACE_INIT(
+			SPA_TYPE_INTERFACE_Device,
+			SPA_VERSION_DEVICE,
+			&impl_device, impl);
+	spa_hook_list_init(&impl->hooks);
+	pw_device_set_implementation(device, &impl->impl);
+
+	pw_resource_add_listener(impl->resource,
+				 &impl->resource_listener,
+				 &resource_events,
+				 impl);
+	pw_resource_set_implementation(impl->resource,
+				       &device_events,
+				       impl);
+
+
+	return device;
+}