Adding upstream version 0.3.65.upstream/0.3.65upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

6 files changed, 1197 insertions, 0 deletions

diff --git a/src/modules/module-session-manager/client-session/client-session.c b/src/modules/module-session-manager/client-session/client-session.c
new file mode 100644
index 0000000..89997c9
--- /dev/null
+++ b/src/modules/module-session-manager/client-session/client-session.c
@@ -0,0 +1,295 @@
+/* PipeWire
+ *
+ * Copyright © 2019 Collabora Ltd.
+ *   @author George Kiagiadakis <george.kiagiadakis@collabora.com>
+ *
+ * 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 <stdbool.h>
+#include <string.h>
+
+#include <spa/utils/result.h>
+
+#include <pipewire/impl.h>
+#include <pipewire/extensions/session-manager.h>
+
+#include "client-session.h"
+#include "session.h"
+#include "endpoint-link.h"
+
+#define NAME "client-session"
+
+struct factory_data {
+	struct pw_impl_module *module;
+	struct spa_hook module_listener;
+
+	struct pw_impl_factory *factory;
+	struct spa_hook factory_listener;
+};
+
+static struct endpoint_link *find_link(struct client_session *this, uint32_t id)
+{
+	struct endpoint_link *l;
+	spa_list_for_each(l, &this->links, link) {
+		if (l->id == id)
+			return l;
+	}
+	return NULL;
+}
+
+static int client_session_update(void *object,
+				uint32_t change_mask,
+				uint32_t n_params,
+				const struct spa_pod **params,
+				const struct pw_session_info *info)
+{
+	struct client_session *this = object;
+	struct session *session = &this->session;
+
+	return session_update(session, change_mask, n_params, params, info);
+}
+
+static int client_session_link_update(void *object,
+				uint32_t link_id,
+				uint32_t change_mask,
+				uint32_t n_params,
+				const struct spa_pod **params,
+				const struct pw_endpoint_link_info *info)
+{
+	struct client_session *this = object;
+	struct session *session = &this->session;
+	struct endpoint_link *link = find_link(this, link_id);
+	struct pw_properties *props = NULL;
+
+	if (!link) {
+		static const char * const keys[] = {
+			PW_KEY_FACTORY_ID,
+			PW_KEY_CLIENT_ID,
+			PW_KEY_SESSION_ID,
+			PW_KEY_ENDPOINT_LINK_OUTPUT_ENDPOINT,
+			PW_KEY_ENDPOINT_LINK_OUTPUT_STREAM,
+			PW_KEY_ENDPOINT_LINK_INPUT_ENDPOINT,
+			PW_KEY_ENDPOINT_LINK_INPUT_STREAM,
+			NULL
+		};
+
+		struct pw_context *context = pw_global_get_context(session->global);
+
+		link = calloc(1, sizeof(struct endpoint_link));
+		if (!link)
+			goto no_mem;
+
+		props = pw_properties_new(NULL, NULL);
+		if (!props)
+			goto no_mem;
+		pw_properties_update_keys(props, &session->props->dict, keys);
+		if (info && info->props)
+			pw_properties_update_keys(props, info->props, keys);
+
+		if (endpoint_link_init(link, link_id, session->info.id,
+					this, context, props) < 0)
+			goto no_mem;
+
+		spa_list_append(&this->links, &link->link);
+	}
+	else if (change_mask & PW_CLIENT_SESSION_LINK_UPDATE_DESTROYED) {
+		endpoint_link_clear(link);
+		spa_list_remove(&link->link);
+		free(link);
+		link = NULL;
+	}
+
+	return link ?
+		endpoint_link_update(link, change_mask, n_params, params, info)
+		: 0;
+
+       no_mem:
+	pw_properties_free(props);
+	free(link);
+	pw_log_error(NAME" %p: cannot update link: no memory", this);
+	pw_resource_error(this->resource, -ENOMEM,
+		"cannot update link: no memory");
+	return -ENOMEM;
+}
+
+static const struct pw_client_session_methods methods = {
+	PW_VERSION_CLIENT_SESSION_METHODS,
+	.update = client_session_update,
+	.link_update = client_session_link_update,
+};
+
+static void client_session_destroy(void *data)
+{
+	struct client_session *this = data;
+	struct endpoint_link *l;
+
+	pw_log_debug(NAME" %p: destroy", this);
+
+	spa_list_consume(l, &this->links, link) {
+		endpoint_link_clear(l);
+		spa_list_remove(&l->link);
+		free(l);
+	}
+	session_clear(&this->session);
+	spa_hook_remove(&this->resource_listener);
+
+	free(this);
+}
+
+static const struct pw_resource_events resource_events = {
+	PW_VERSION_RESOURCE_EVENTS,
+	.destroy = client_session_destroy,
+};
+
+static void *create_object(void *data,
+			   struct pw_resource *owner_resource,
+			   const char *type,
+			   uint32_t version,
+			   struct pw_properties *properties,
+			   uint32_t new_id)
+{
+	struct factory_data *d = data;
+	struct pw_impl_factory *factory = d->factory;
+	struct client_session *this;
+	struct pw_impl_client *owner = pw_resource_get_client(owner_resource);
+	struct pw_context *context = pw_impl_client_get_context(owner);
+
+	this = calloc(1, sizeof(struct client_session));
+	if (this == NULL)
+		goto no_mem;
+
+	spa_list_init(&this->links);
+
+	pw_log_debug(NAME" %p: new", this);
+
+	if (!properties)
+		properties = pw_properties_new(NULL, NULL);
+	if (!properties)
+		goto no_mem;
+
+	pw_properties_setf(properties, PW_KEY_CLIENT_ID, "%d",
+			pw_impl_client_get_info(owner)->id);
+	pw_properties_setf(properties, PW_KEY_FACTORY_ID, "%d",
+			pw_impl_factory_get_info(factory)->id);
+
+	this->resource = pw_resource_new(owner, new_id, PW_PERM_ALL, type, version, 0);
+	if (this->resource == NULL)
+		goto no_mem;
+
+	if (session_init(&this->session, this, context, properties) < 0)
+		goto no_mem;
+
+	pw_resource_add_listener(this->resource, &this->resource_listener,
+				 &resource_events, this);
+	pw_resource_add_object_listener(this->resource, &this->object_listener,
+					&methods, this);
+
+	return this;
+
+      no_mem:
+	pw_properties_free(properties);
+	if (this && this->resource)
+		pw_resource_destroy(this->resource);
+	free(this);
+	pw_log_error("can't create client session: no memory");
+	pw_resource_error(owner_resource, -ENOMEM,
+			"can't create client session: no memory");
+	return NULL;
+}
+
+static const struct pw_impl_factory_implementation impl_factory = {
+	PW_VERSION_IMPL_FACTORY_IMPLEMENTATION,
+	.create_object = create_object,
+};
+
+static void factory_destroy(void *data)
+{
+	struct factory_data *d = data;
+	spa_hook_remove(&d->factory_listener);
+	d->factory = NULL;
+	if (d->module)
+		pw_impl_module_destroy(d->module);
+}
+
+static const struct pw_impl_factory_events factory_events = {
+	PW_VERSION_IMPL_FACTORY_EVENTS,
+	.destroy = factory_destroy,
+};
+
+static void module_destroy(void *data)
+{
+	struct factory_data *d = data;
+	spa_hook_remove(&d->module_listener);
+	d->module = NULL;
+	if (d->factory)
+		pw_impl_factory_destroy(d->factory);
+}
+
+static void module_registered(void *data)
+{
+	struct factory_data *d = data;
+	struct pw_impl_module *module = d->module;
+	struct pw_impl_factory *factory = d->factory;
+	struct spa_dict_item items[1];
+	char id[16];
+	int res;
+
+	snprintf(id, sizeof(id), "%d", pw_impl_module_get_info(module)->id);
+	items[0] = SPA_DICT_ITEM_INIT(PW_KEY_MODULE_ID, id);
+	pw_impl_factory_update_properties(factory, &SPA_DICT_INIT(items, 1));
+
+	if ((res = pw_impl_factory_register(factory, NULL)) < 0) {
+		pw_log_error(NAME" %p: can't register factory: %s", factory, spa_strerror(res));
+	}
+}
+
+static const struct pw_impl_module_events module_events = {
+	PW_VERSION_IMPL_MODULE_EVENTS,
+	.destroy = module_destroy,
+	.registered = module_registered,
+};
+
+int client_session_factory_init(struct pw_impl_module *module)
+{
+	struct pw_context *context = pw_impl_module_get_context(module);
+	struct pw_impl_factory *factory;
+	struct factory_data *data;
+
+	factory = pw_context_create_factory(context,
+				 "client-session",
+				 PW_TYPE_INTERFACE_ClientSession,
+				 PW_VERSION_CLIENT_SESSION,
+				 NULL,
+				 sizeof(*data));
+	if (factory == NULL)
+		return -ENOMEM;
+
+	data = pw_impl_factory_get_user_data(factory);
+	data->factory = factory;
+	data->module = module;
+
+	pw_impl_factory_set_implementation(factory, &impl_factory, data);
+	pw_impl_factory_add_listener(factory, &data->factory_listener, &factory_events, data);
+
+	pw_impl_module_add_listener(module, &data->module_listener, &module_events, data);
+
+	return 0;
+}
diff --git a/src/modules/module-session-manager/client-session/client-session.h b/src/modules/module-session-manager/client-session/client-session.h
new file mode 100644
index 0000000..fc6124c
--- /dev/null
+++ b/src/modules/module-session-manager/client-session/client-session.h
@@ -0,0 +1,62 @@
+/* PipeWire
+ *
+ * Copyright © 2019 Collabora Ltd.
+ *   @author George Kiagiadakis <george.kiagiadakis@collabora.com>
+ *
+ * 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 MODULE_SESSION_MANAGER_CLIENT_SESSION_H
+#define MODULE_SESSION_MANAGER_CLIENT_SESSION_H
+
+#include "session.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct client_session {
+	struct pw_resource *resource;
+	struct spa_hook resource_listener;
+	struct spa_hook object_listener;
+	struct session session;
+	struct spa_list links;
+};
+
+#define pw_client_session_resource(r,m,v,...)	\
+	pw_resource_call_res(r,struct pw_client_session_events,m,v,__VA_ARGS__)
+#define pw_client_session_resource_set_id(r,...)	\
+	pw_client_session_resource(r,set_id,0,__VA_ARGS__)
+#define pw_client_session_resource_set_param(r,...)	\
+	pw_client_session_resource(r,set_param,0,__VA_ARGS__)
+#define pw_client_session_resource_link_set_param(r,...)	\
+	pw_client_session_resource(r,link_set_param,0,__VA_ARGS__)
+#define pw_client_session_resource_create_link(r,...)	\
+	pw_client_session_resource(r,create_link,0,__VA_ARGS__)
+#define pw_client_session_resource_destroy_link(r,...)	\
+	pw_client_session_resource(r,destroy_link,0,__VA_ARGS__)
+#define pw_client_session_resource_link_request_state(r,...)	\
+	pw_client_session_resource(r,link_request_state,0,__VA_ARGS__)
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* MODULE_SESSION_MANAGER_CLIENT_SESSION_H */
diff --git a/src/modules/module-session-manager/client-session/endpoint-link.c b/src/modules/module-session-manager/client-session/endpoint-link.c
new file mode 100644
index 0000000..0bdbfc9
--- /dev/null
+++ b/src/modules/module-session-manager/client-session/endpoint-link.c
@@ -0,0 +1,369 @@
+/* PipeWire
+ *
+ * Copyright © 2019 Collabora Ltd.
+ *   @author George Kiagiadakis <george.kiagiadakis@collabora.com>
+ *
+ * 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 <stdbool.h>
+#include <string.h>
+
+#include <pipewire/impl.h>
+#include <pipewire/extensions/session-manager.h>
+
+#include <spa/pod/filter.h>
+
+#include "endpoint-link.h"
+#include "client-session.h"
+
+#define NAME "endpoint-link"
+
+struct resource_data {
+	struct endpoint_link *link;
+	struct spa_hook object_listener;
+	uint32_t n_subscribe_ids;
+	uint32_t subscribe_ids[32];
+};
+
+#define pw_endpoint_link_resource(r,m,v,...)	\
+	pw_resource_call(r,struct pw_endpoint_link_events,m,v,__VA_ARGS__)
+#define pw_endpoint_link_resource_info(r,...)	\
+	pw_endpoint_link_resource(r,info,0,__VA_ARGS__)
+#define pw_endpoint_link_resource_param(r,...)	\
+	pw_endpoint_link_resource(r,param,0,__VA_ARGS__)
+
+static int endpoint_link_enum_params (void *object, int seq,
+				uint32_t id, uint32_t start, uint32_t num,
+				const struct spa_pod *filter)
+{
+	struct pw_resource *resource = object;
+	struct resource_data *data = pw_resource_get_user_data(resource);
+	struct endpoint_link *this = data->link;
+	struct spa_pod *result;
+	struct spa_pod *param;
+	uint8_t buffer[1024];
+	struct spa_pod_builder b = { 0 };
+	uint32_t index;
+	uint32_t next = start;
+	uint32_t count = 0;
+
+	while (true) {
+		index = next++;
+		if (index >= this->n_params)
+			break;
+
+		param = this->params[index];
+
+		if (param == NULL || !spa_pod_is_object_id(param, id))
+			continue;
+
+		spa_pod_builder_init(&b, buffer, sizeof(buffer));
+		if (spa_pod_filter(&b, &result, param, filter) != 0)
+			continue;
+
+		pw_log_debug(NAME" %p: %d param %u", this, seq, index);
+
+		pw_endpoint_link_resource_param(resource, seq, id, index, next, result);
+
+		if (++count == num)
+			break;
+	}
+	return 0;
+}
+
+static int endpoint_link_subscribe_params (void *object, uint32_t *ids, uint32_t n_ids)
+{
+	struct pw_resource *resource = object;
+	struct resource_data *data = pw_resource_get_user_data(resource);
+	uint32_t i;
+
+	n_ids = SPA_MIN(n_ids, SPA_N_ELEMENTS(data->subscribe_ids));
+	data->n_subscribe_ids = n_ids;
+
+	for (i = 0; i < n_ids; i++) {
+		data->subscribe_ids[i] = ids[i];
+		pw_log_debug(NAME" %p: resource %d subscribe param %u",
+			data->link, pw_resource_get_id(resource), ids[i]);
+		endpoint_link_enum_params(resource, 1, ids[i], 0, UINT32_MAX, NULL);
+	}
+	return 0;
+}
+
+static int endpoint_link_set_param (void *object, uint32_t id, uint32_t flags,
+				const struct spa_pod *param)
+{
+	struct pw_resource *resource = object;
+	struct resource_data *data = pw_resource_get_user_data(resource);
+	struct endpoint_link *this = data->link;
+
+	pw_client_session_resource_set_param(this->client_sess->resource,
+						id, flags, param);
+
+	return 0;
+}
+
+static int endpoint_link_request_state(void *object, enum pw_endpoint_link_state state)
+{
+	struct pw_resource *resource = object;
+	struct resource_data *data = pw_resource_get_user_data(resource);
+	struct endpoint_link *this = data->link;
+
+	pw_client_session_resource_link_request_state(this->client_sess->resource,
+						      this->id, state);
+
+	return 0;
+}
+
+static const struct pw_endpoint_link_methods methods = {
+	PW_VERSION_ENDPOINT_LINK_METHODS,
+	.subscribe_params = endpoint_link_subscribe_params,
+	.enum_params = endpoint_link_enum_params,
+	.set_param = endpoint_link_set_param,
+	.request_state = endpoint_link_request_state,
+};
+
+struct emit_param_data {
+	struct endpoint_link *this;
+	struct spa_pod *param;
+	uint32_t id;
+	uint32_t index;
+	uint32_t next;
+};
+
+static int emit_param(void *_data, struct pw_resource *resource)
+{
+	struct emit_param_data *d = _data;
+	struct resource_data *data;
+	uint32_t i;
+
+	data = pw_resource_get_user_data(resource);
+	for (i = 0; i < data->n_subscribe_ids; i++) {
+		if (data->subscribe_ids[i] == d->id) {
+			pw_endpoint_link_resource_param(resource, 1,
+				d->id, d->index, d->next, d->param);
+		}
+	}
+	return 0;
+}
+
+static void endpoint_link_notify_subscribed(struct endpoint_link *this,
+					uint32_t index, uint32_t next)
+{
+	struct pw_global *global = this->global;
+	struct emit_param_data data;
+	struct spa_pod *param = this->params[index];
+
+	if (!param || !spa_pod_is_object (param))
+		return;
+
+	data.this = this;
+	data.param = param;
+	data.id = SPA_POD_OBJECT_ID (param);
+	data.index = index;
+	data.next = next;
+
+	pw_global_for_each_resource(global, emit_param, &data);
+}
+
+static int emit_info(void *data, struct pw_resource *resource)
+{
+	struct endpoint_link *this = data;
+	pw_endpoint_link_resource_info(resource, &this->info);
+	return 0;
+}
+
+int endpoint_link_update(struct endpoint_link *this,
+			uint32_t change_mask,
+			uint32_t n_params,
+			const struct spa_pod **params,
+			const struct pw_endpoint_link_info *info)
+{
+	if (change_mask & PW_CLIENT_SESSION_UPDATE_PARAMS) {
+		uint32_t i;
+
+		pw_log_debug(NAME" %p: update %d params", this, n_params);
+
+		for (i = 0; i < this->n_params; i++)
+			free(this->params[i]);
+		this->n_params = n_params;
+		if (this->n_params == 0) {
+			free(this->params);
+			this->params = NULL;
+		} else {
+			void *p;
+			p = pw_reallocarray(this->params, n_params, sizeof(struct spa_pod*));
+			if (p == NULL) {
+				free(this->params);
+				this->params = NULL;
+				this->n_params = 0;
+				goto no_mem;
+			}
+			this->params = p;
+		}
+		for (i = 0; i < this->n_params; i++) {
+			this->params[i] = params[i] ? spa_pod_copy(params[i]) : NULL;
+			endpoint_link_notify_subscribed(this, i, i+1);
+		}
+	}
+
+	if (change_mask & PW_CLIENT_SESSION_UPDATE_INFO) {
+		if (info->change_mask & PW_ENDPOINT_LINK_CHANGE_MASK_STATE) {
+			this->info.state = info->state;
+			free(this->info.error);
+			this->info.error = info->error ? strdup(info->error) : NULL;
+		}
+
+		if (info->change_mask & PW_ENDPOINT_LINK_CHANGE_MASK_PROPS)
+			pw_properties_update(this->props, info->props);
+
+		if (info->change_mask & PW_ENDPOINT_LINK_CHANGE_MASK_PARAMS) {
+			this->info.n_params = info->n_params;
+			if (info->n_params == 0) {
+				free(this->info.params);
+				this->info.params = NULL;
+			} else {
+				void *p;
+				p = pw_reallocarray(this->info.params, info->n_params, sizeof(struct spa_param_info));
+				if (p == NULL) {
+					free(this->info.params);
+					this->info.params = NULL;
+					this->info.n_params = 0;
+					goto no_mem;
+				}
+				this->info.params = p;
+				memcpy(this->info.params, info->params, info->n_params * sizeof(struct spa_param_info));
+			}
+		}
+
+		if (!this->info.output_endpoint_id) {
+			this->info.output_endpoint_id = info->output_endpoint_id;
+			this->info.output_stream_id = info->output_stream_id;
+			this->info.input_endpoint_id = info->input_endpoint_id;
+			this->info.input_stream_id = info->input_stream_id;
+		}
+
+		this->info.change_mask = info->change_mask;
+		pw_global_for_each_resource(this->global, emit_info, this);
+		this->info.change_mask = 0;
+	}
+
+	return 0;
+
+      no_mem:
+	pw_log_error(NAME" %p: can't update: no memory", this);
+	pw_resource_error(this->client_sess->resource, -ENOMEM,
+			"can't update: no memory");
+	return -ENOMEM;
+}
+
+static int endpoint_link_bind(void *_data, struct pw_impl_client *client,
+			uint32_t permissions, uint32_t version, uint32_t id)
+{
+	struct endpoint_link *this = _data;
+	struct pw_global *global = this->global;
+	struct pw_resource *resource;
+	struct resource_data *data;
+
+	resource = pw_resource_new(client, id, permissions,
+			pw_global_get_type(global), version, sizeof(*data));
+	if (resource == NULL)
+		goto no_mem;
+
+	data = pw_resource_get_user_data(resource);
+	data->link = this;
+	pw_resource_add_object_listener(resource, &data->object_listener,
+					&methods, resource);
+
+	pw_log_debug(NAME" %p: bound to %d", this, pw_resource_get_id(resource));
+	pw_global_add_resource(global, resource);
+
+	this->info.change_mask = PW_ENDPOINT_LINK_CHANGE_MASK_ALL;
+	pw_endpoint_link_resource_info(resource, &this->info);
+	this->info.change_mask = 0;
+
+	return 0;
+
+      no_mem:
+	pw_log_error(NAME" %p: can't create resource: no memory", this);
+	pw_resource_error(this->client_sess->resource, -ENOMEM,
+			"can't create resource: no memory");
+	return -ENOMEM;
+}
+
+int endpoint_link_init(struct endpoint_link *this,
+		uint32_t id, uint32_t session_id,
+		struct client_session *client_sess,
+		struct pw_context *context,
+		struct pw_properties *properties)
+{
+	pw_log_debug(NAME" %p: new", this);
+
+	this->client_sess = client_sess;
+	this->id = id;
+	this->props = properties;
+
+	pw_properties_setf(properties, PW_KEY_SESSION_ID, "%u", session_id);
+
+	properties = pw_properties_copy(properties);
+	if (!properties)
+		goto no_mem;
+
+	this->global = pw_global_new(context,
+			PW_TYPE_INTERFACE_EndpointLink,
+			PW_VERSION_ENDPOINT_LINK,
+			properties, endpoint_link_bind, this);
+	if (!this->global)
+		goto no_mem;
+
+	pw_properties_setf(this->props, PW_KEY_OBJECT_ID, "%u",
+			pw_global_get_id(this->global));
+	pw_properties_setf(this->props, PW_KEY_OBJECT_SERIAL, "%"PRIu64,
+			pw_global_get_serial(this->global));
+
+	this->info.version = PW_VERSION_ENDPOINT_LINK_INFO;
+	this->info.id = pw_global_get_id(this->global);
+	this->info.session_id = session_id;
+	this->info.props = &this->props->dict;
+
+	return pw_global_register(this->global);
+
+      no_mem:
+	pw_log_error(NAME" - can't create - out of memory");
+	return -ENOMEM;
+}
+
+void endpoint_link_clear(struct endpoint_link *this)
+{
+	uint32_t i;
+
+	pw_log_debug(NAME" %p: destroy", this);
+
+	pw_global_destroy(this->global);
+
+	for (i = 0; i < this->n_params; i++)
+		free(this->params[i]);
+	free(this->params);
+
+	free(this->info.error);
+	free(this->info.params);
+
+	pw_properties_free(this->props);
+}
diff --git a/src/modules/module-session-manager/client-session/endpoint-link.h b/src/modules/module-session-manager/client-session/endpoint-link.h
new file mode 100644
index 0000000..c75f975
--- /dev/null
+++ b/src/modules/module-session-manager/client-session/endpoint-link.h
@@ -0,0 +1,65 @@
+/* PipeWire
+ *
+ * Copyright © 2019 Collabora Ltd.
+ *   @author George Kiagiadakis <george.kiagiadakis@collabora.com>
+ *
+ * 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 MODULE_SESSION_MANAGER_ENDPOINT_LINK_H
+#define MODULE_SESSION_MANAGER_ENDPOINT_LINK_H
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct client_session;
+
+struct endpoint_link {
+	struct spa_list link;
+	struct client_session *client_sess;
+	struct pw_global *global;
+	uint32_t id;			/* session-local link id */
+	uint32_t n_params;
+	struct spa_pod **params;
+	struct pw_endpoint_link_info info;
+	struct pw_properties *props;	/* wrapper of info.props */
+};
+
+int endpoint_link_init(struct endpoint_link *this,
+		uint32_t id, uint32_t session_id,
+		struct client_session *client_sess,
+		struct pw_context *context,
+		struct pw_properties *properties);
+
+void endpoint_link_clear(struct endpoint_link *this);
+
+int endpoint_link_update(struct endpoint_link *this,
+			uint32_t change_mask,
+			uint32_t n_params,
+			const struct spa_pod **params,
+			const struct pw_endpoint_link_info *info);
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* MODULE_SESSION_MANAGER_ENDPOINT_LINK_H */
diff --git a/src/modules/module-session-manager/client-session/session.c b/src/modules/module-session-manager/client-session/session.c
new file mode 100644
index 0000000..87c1b96
--- /dev/null
+++ b/src/modules/module-session-manager/client-session/session.c
@@ -0,0 +1,344 @@
+/* PipeWire
+ *
+ * Copyright © 2019 Collabora Ltd.
+ *   @author George Kiagiadakis <george.kiagiadakis@collabora.com>
+ *
+ * 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 <stdbool.h>
+#include <string.h>
+
+#include <pipewire/impl.h>
+#include <pipewire/extensions/session-manager.h>
+
+#include <spa/pod/filter.h>
+
+#include "session.h"
+#include "client-session.h"
+
+#define NAME "session"
+
+struct resource_data {
+	struct session *session;
+	struct spa_hook object_listener;
+	uint32_t n_subscribe_ids;
+	uint32_t subscribe_ids[32];
+};
+
+#define pw_session_resource(r,m,v,...)	\
+	pw_resource_call(r,struct pw_session_events,m,v,__VA_ARGS__)
+#define pw_session_resource_info(r,...)	\
+	pw_session_resource(r,info,0,__VA_ARGS__)
+#define pw_session_resource_param(r,...)	\
+	pw_session_resource(r,param,0,__VA_ARGS__)
+
+static int session_enum_params (void *object, int seq,
+				uint32_t id, uint32_t start, uint32_t num,
+				const struct spa_pod *filter)
+{
+	struct pw_resource *resource = object;
+	struct resource_data *data = pw_resource_get_user_data(resource);
+	struct session *this = data->session;
+	struct spa_pod *result;
+	struct spa_pod *param;
+	uint8_t buffer[1024];
+	struct spa_pod_builder b = { 0 };
+	uint32_t index;
+	uint32_t next = start;
+	uint32_t count = 0;
+
+	while (true) {
+		index = next++;
+		if (index >= this->n_params)
+			break;
+
+		param = this->params[index];
+
+		if (param == NULL || !spa_pod_is_object_id(param, id))
+			continue;
+
+		spa_pod_builder_init(&b, buffer, sizeof(buffer));
+		if (spa_pod_filter(&b, &result, param, filter) != 0)
+			continue;
+
+		pw_log_debug(NAME" %p: %d param %u", this, seq, index);
+
+		pw_session_resource_param(resource, seq, id, index, next, result);
+
+		if (++count == num)
+			break;
+	}
+	return 0;
+}
+
+static int session_subscribe_params (void *object, uint32_t *ids, uint32_t n_ids)
+{
+	struct pw_resource *resource = object;
+	struct resource_data *data = pw_resource_get_user_data(resource);
+	uint32_t i;
+
+	n_ids = SPA_MIN(n_ids, SPA_N_ELEMENTS(data->subscribe_ids));
+	data->n_subscribe_ids = n_ids;
+
+	for (i = 0; i < n_ids; i++) {
+		data->subscribe_ids[i] = ids[i];
+		pw_log_debug(NAME" %p: resource %d subscribe param %u",
+			data->session, pw_resource_get_id(resource), ids[i]);
+		session_enum_params(resource, 1, ids[i], 0, UINT32_MAX, NULL);
+	}
+	return 0;
+}
+
+static int session_set_param (void *object, uint32_t id, uint32_t flags,
+				const struct spa_pod *param)
+{
+	struct pw_resource *resource = object;
+	struct resource_data *data = pw_resource_get_user_data(resource);
+	struct session *this = data->session;
+
+	pw_client_session_resource_set_param(this->client_sess->resource,
+						id, flags, param);
+
+	return 0;
+}
+
+static const struct pw_session_methods methods = {
+	PW_VERSION_SESSION_METHODS,
+	.subscribe_params = session_subscribe_params,
+	.enum_params = session_enum_params,
+	.set_param = session_set_param,
+};
+
+struct emit_param_data {
+	struct session *this;
+	struct spa_pod *param;
+	uint32_t id;
+	uint32_t index;
+	uint32_t next;
+};
+
+static int emit_param(void *_data, struct pw_resource *resource)
+{
+	struct emit_param_data *d = _data;
+	struct resource_data *data;
+	uint32_t i;
+
+	data = pw_resource_get_user_data(resource);
+	for (i = 0; i < data->n_subscribe_ids; i++) {
+		if (data->subscribe_ids[i] == d->id) {
+			pw_session_resource_param(resource, 1,
+				d->id, d->index, d->next, d->param);
+		}
+	}
+	return 0;
+}
+
+static void session_notify_subscribed(struct session *this,
+					uint32_t index, uint32_t next)
+{
+	struct pw_global *global = this->global;
+	struct emit_param_data data;
+	struct spa_pod *param = this->params[index];
+
+	if (!param || !spa_pod_is_object (param))
+		return;
+
+	data.this = this;
+	data.param = param;
+	data.id = SPA_POD_OBJECT_ID (param);
+	data.index = index;
+	data.next = next;
+
+	pw_global_for_each_resource(global, emit_param, &data);
+}
+
+static int emit_info(void *data, struct pw_resource *resource)
+{
+	struct session *this = data;
+	pw_session_resource_info(resource, &this->info);
+	return 0;
+}
+
+int session_update(struct session *this,
+			uint32_t change_mask,
+			uint32_t n_params,
+			const struct spa_pod **params,
+			const struct pw_session_info *info)
+{
+	if (change_mask & PW_CLIENT_SESSION_UPDATE_PARAMS) {
+		uint32_t i;
+
+		pw_log_debug(NAME" %p: update %d params", this, n_params);
+
+		for (i = 0; i < this->n_params; i++)
+			free(this->params[i]);
+		this->n_params = n_params;
+		if (this->n_params == 0) {
+			free(this->params);
+			this->params = NULL;
+		} else {
+			void *p;
+			p = pw_reallocarray(this->params, n_params, sizeof(struct spa_pod*));
+			if (p == NULL) {
+				free(this->params);
+				this->params = NULL;
+				this->n_params = 0;
+				goto no_mem;
+			}
+			this->params = p;
+		}
+		for (i = 0; i < this->n_params; i++) {
+			this->params[i] = params[i] ? spa_pod_copy(params[i]) : NULL;
+			session_notify_subscribed(this, i, i+1);
+		}
+	}
+
+	if (change_mask & PW_CLIENT_SESSION_UPDATE_INFO) {
+		if (info->change_mask & PW_SESSION_CHANGE_MASK_PROPS)
+			pw_properties_update(this->props, info->props);
+
+		if (info->change_mask & PW_SESSION_CHANGE_MASK_PARAMS) {
+			this->info.n_params = info->n_params;
+			if (info->n_params == 0) {
+				free(this->info.params);
+				this->info.params = NULL;
+			} else {
+				void *p;
+				p = pw_reallocarray(this->info.params, info->n_params, sizeof(struct spa_param_info));
+				if (p == NULL) {
+					free(this->info.params);
+					this->info.params = NULL;
+					this->info.n_params = 0;
+					goto no_mem;
+				}
+				this->info.params = p;
+				memcpy(this->info.params, info->params, info->n_params * sizeof(struct spa_param_info));
+			}
+		}
+		this->info.change_mask = info->change_mask;
+		pw_global_for_each_resource(this->global, emit_info, this);
+		this->info.change_mask = 0;
+	}
+
+	return 0;
+
+      no_mem:
+	pw_log_error(NAME" can't update: no memory");
+	pw_resource_error(this->client_sess->resource, -ENOMEM,
+			NAME" can't update: no memory");
+	return -ENOMEM;
+}
+
+static int session_bind(void *_data, struct pw_impl_client *client,
+			uint32_t permissions, uint32_t version, uint32_t id)
+{
+	struct session *this = _data;
+	struct pw_global *global = this->global;
+	struct pw_resource *resource;
+	struct resource_data *data;
+
+	resource = pw_resource_new(client, id, permissions,
+			pw_global_get_type(global), version, sizeof(*data));
+	if (resource == NULL)
+		goto no_mem;
+
+	data = pw_resource_get_user_data(resource);
+	data->session = this;
+
+	pw_resource_add_object_listener(resource, &data->object_listener,
+					&methods, resource);
+
+	pw_log_debug(NAME" %p: bound to %d", this, pw_resource_get_id(resource));
+	pw_global_add_resource(global, resource);
+
+	this->info.change_mask = PW_SESSION_CHANGE_MASK_ALL;
+	pw_session_resource_info(resource, &this->info);
+	this->info.change_mask = 0;
+
+	return 0;
+
+      no_mem:
+	pw_log_error(NAME" can't create resource: no memory");
+	pw_resource_error(this->client_sess->resource, -ENOMEM,
+			NAME" can't create resource: no memory");
+	return -ENOMEM;
+}
+
+int session_init(struct session *this,
+		struct client_session *client_sess,
+		struct pw_context *context,
+		struct pw_properties *properties)
+{
+	static const char * const keys[] = {
+		PW_KEY_OBJECT_SERIAL,
+		PW_KEY_FACTORY_ID,
+		PW_KEY_CLIENT_ID,
+		NULL
+	};
+
+	pw_log_debug(NAME" %p: new", this);
+
+	this->client_sess = client_sess;
+	this->props = properties;
+
+	this->global = pw_global_new (context,
+			PW_TYPE_INTERFACE_Session,
+			PW_VERSION_SESSION,
+			NULL, session_bind, this);
+	if (!this->global)
+		goto no_mem;
+
+	pw_properties_setf(this->props, PW_KEY_OBJECT_ID, "%u",
+			pw_global_get_id(this->global));
+	pw_properties_setf(this->props, PW_KEY_OBJECT_SERIAL, "%"PRIu64,
+			pw_global_get_serial(this->global));
+
+	this->info.version = PW_VERSION_SESSION_INFO;
+	this->info.id = pw_global_get_id(this->global);
+	this->info.props = &this->props->dict;
+
+	pw_global_update_keys(this->global, &this->props->dict, keys);
+
+	pw_resource_set_bound_id(client_sess->resource, this->info.id);
+
+	return pw_global_register(this->global);
+
+      no_mem:
+	pw_log_error(NAME" - can't create - out of memory");
+	return -ENOMEM;
+}
+
+void session_clear(struct session *this)
+{
+	uint32_t i;
+
+	pw_log_debug(NAME" %p: destroy", this);
+
+	pw_global_destroy(this->global);
+
+	for (i = 0; i < this->n_params; i++)
+		free(this->params[i]);
+	free(this->params);
+
+	free(this->info.params);
+
+	pw_properties_free(this->props);
+}
diff --git a/src/modules/module-session-manager/client-session/session.h b/src/modules/module-session-manager/client-session/session.h
new file mode 100644
index 0000000..a94b18f
--- /dev/null
+++ b/src/modules/module-session-manager/client-session/session.h
@@ -0,0 +1,62 @@
+/* PipeWire
+ *
+ * Copyright © 2019 Collabora Ltd.
+ *   @author George Kiagiadakis <george.kiagiadakis@collabora.com>
+ *
+ * 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 MODULE_SESSION_MANAGER_SESSION_H
+#define MODULE_SESSION_MANAGER_SESSION_H
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct client_session;
+
+struct session {
+	struct client_session *client_sess;
+	struct pw_global *global;
+	uint32_t n_params;
+	struct spa_pod **params;
+	struct pw_session_info info;
+	struct pw_properties *props;	/* wrapper of info.props */
+};
+
+int session_init(struct session *this,
+		struct client_session *client_sess,
+		struct pw_context *context,
+		struct pw_properties *properties);
+
+void session_clear(struct session *this);
+
+int session_update(struct session *this,
+			uint32_t change_mask,
+			uint32_t n_params,
+			const struct spa_pod **params,
+			const struct pw_session_info *info);
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* MODULE_SESSION_MANAGER_SESSION_H */