1 files changed, 394 insertions, 0 deletions
diff --git a/src/modules/module-adapter.c b/src/modules/module-adapter.c
new file mode 100644
index 0000000..edc183b
--- /dev/null
+++ b/src/modules/module-adapter.c
@@ -0,0 +1,394 @@
+/* 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 <stdio.h>
+#include <errno.h>
+#include <dlfcn.h>
+
+#include "config.h"
+
+#include <spa/node/node.h>
+#include <spa/utils/hook.h>
+#include <spa/utils/result.h>
+
+#include <pipewire/impl.h>
+
+#include "modules/spa/spa-node.h"
+#include "module-adapter/adapter.h"
+
+/** \page page_module_adapter PipeWire Module: Adapter
+ */
+#define NAME "adapter"
+
+PW_LOG_TOPIC(mod_topic, "mod." NAME);
+#define PW_LOG_TOPIC_DEFAULT mod_topic
+
+#define FACTORY_USAGE	SPA_KEY_FACTORY_NAME"=<factory-name> " \
+			"["SPA_KEY_LIBRARY_NAME"=<library-name>] " \
+			ADAPTER_USAGE
+
+static const struct spa_dict_item module_props[] = {
+	{ PW_KEY_MODULE_AUTHOR, "Wim Taymans <wim.taymans@gmail.com>" },
+	{ PW_KEY_MODULE_DESCRIPTION, "Manage adapter nodes" },
+	{ PW_KEY_MODULE_VERSION, PACKAGE_VERSION },
+};
+
+struct factory_data {
+	struct pw_impl_factory *factory;
+	struct spa_hook factory_listener;
+
+	struct spa_list node_list;
+
+	struct pw_context *context;
+	struct pw_impl_module *module;
+	struct spa_hook module_listener;
+};
+
+struct node_data {
+	struct factory_data *data;
+	struct spa_list link;
+	struct pw_impl_node *adapter;
+	struct pw_impl_node *follower;
+	struct spa_handle *handle;
+	struct spa_hook adapter_listener;
+	struct pw_resource *resource;
+	struct pw_resource *bound_resource;
+	struct spa_hook resource_listener;
+	uint32_t new_id;
+	unsigned int linger;
+};
+
+static void resource_destroy(void *data)
+{
+	struct node_data *nd = data;
+
+	pw_log_debug("%p: destroy %p", nd, nd->adapter);
+	spa_hook_remove(&nd->resource_listener);
+	nd->bound_resource = NULL;
+	if (nd->adapter && !nd->linger)
+		pw_impl_node_destroy(nd->adapter);
+}
+
+static const struct pw_resource_events resource_events = {
+	PW_VERSION_RESOURCE_EVENTS,
+	.destroy = resource_destroy
+};
+
+static void node_destroy(void *data)
+{
+	struct node_data *nd = data;
+	pw_log_debug("%p: destroy %p", nd, nd->adapter);
+	spa_list_remove(&nd->link);
+	nd->adapter = NULL;
+}
+
+static void node_free(void *data)
+{
+	struct node_data *nd = data;
+
+	pw_log_debug("%p: free %p", nd, nd->follower);
+
+	if (nd->bound_resource != NULL)
+		spa_hook_remove(&nd->resource_listener);
+
+	spa_hook_remove(&nd->adapter_listener);
+
+	if (nd->follower)
+		pw_impl_node_destroy(nd->follower);
+	if (nd->handle)
+		pw_unload_spa_handle(nd->handle);
+}
+
+static void node_initialized(void *data)
+{
+	struct node_data *nd = data;
+	struct pw_impl_client *client;
+	struct pw_resource *bound_resource;
+	struct pw_global *global;
+	int res;
+
+	if (nd->resource == NULL)
+		return;
+
+	client = pw_resource_get_client(nd->resource);
+	global = pw_impl_node_get_global(nd->adapter);
+
+	res = pw_global_bind(global, client,
+			PW_PERM_ALL, PW_VERSION_NODE, nd->new_id);
+	if (res < 0)
+		goto error_bind;
+
+	if ((bound_resource = pw_impl_client_find_resource(client, nd->new_id)) == NULL) {
+		res = -EIO;
+		goto error_bind;
+	}
+
+	nd->bound_resource = bound_resource;
+	pw_resource_add_listener(bound_resource, &nd->resource_listener, &resource_events, nd);
+	return;
+
+error_bind:
+	pw_resource_errorf_id(nd->resource, nd->new_id, res,
+			"can't bind adapter node: %s", spa_strerror(res));
+	return;
+}
+
+
+static const struct pw_impl_node_events node_events = {
+	PW_VERSION_IMPL_NODE_EVENTS,
+	.destroy = node_destroy,
+	.free = node_free,
+	.initialized = node_initialized,
+};
+
+static void *create_object(void *_data,
+			   struct pw_resource *resource,
+			   const char *type,
+			   uint32_t version,
+			   struct pw_properties *properties,
+			   uint32_t new_id)
+{
+	struct factory_data *d = _data;
+	struct pw_impl_client *client;
+	struct pw_impl_node *adapter, *follower;
+	struct spa_node *spa_follower;
+	const char *str;
+	int res;
+	struct node_data *nd;
+	bool linger, do_register;
+	struct spa_handle *handle = NULL;
+	const struct pw_properties *p;
+
+	if (properties == NULL)
+		goto error_properties;
+
+	pw_properties_setf(properties, PW_KEY_FACTORY_ID, "%d",
+			pw_impl_factory_get_info(d->factory)->id);
+
+	linger = pw_properties_get_bool(properties, PW_KEY_OBJECT_LINGER, false);
+	do_register = pw_properties_get_bool(properties, PW_KEY_OBJECT_REGISTER, true);
+
+	p = pw_context_get_properties(d->context);
+	pw_properties_set(properties, "clock.quantum-limit",
+			pw_properties_get(p, "default.clock.quantum-limit"));
+
+	client = resource ? pw_resource_get_client(resource): NULL;
+	if (client && !linger) {
+		pw_properties_setf(properties, PW_KEY_CLIENT_ID, "%d",
+				pw_impl_client_get_info(client)->id);
+	}
+
+	follower = NULL;
+	spa_follower = NULL;
+	str = pw_properties_get(properties, "adapt.follower.node");
+	if (str != NULL) {
+		if (sscanf(str, "pointer:%p", &follower) != 1)
+			goto error_properties;
+		spa_follower = pw_impl_node_get_implementation(follower);
+	}
+	str = pw_properties_get(properties, "adapt.follower.spa-node");
+	if (str != NULL) {
+		if (sscanf(str, "pointer:%p", &spa_follower) != 1)
+			goto error_properties;
+	}
+	if (spa_follower == NULL) {
+		void *iface;
+		const char *factory_name;
+
+		factory_name = pw_properties_get(properties, SPA_KEY_FACTORY_NAME);
+		if (factory_name == NULL)
+			goto error_properties;
+
+		handle = pw_context_load_spa_handle(d->context,
+				factory_name,
+				properties ? &properties->dict : NULL);
+		if (handle == NULL)
+			goto error_errno;
+
+		if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_Node, &iface)) < 0)
+			goto error_res;
+
+		spa_follower = iface;
+	}
+	if (spa_follower == NULL) {
+		res = -EINVAL;
+		goto error_res;
+	}
+
+	adapter = pw_adapter_new(pw_impl_module_get_context(d->module),
+			spa_follower,
+			properties,
+			sizeof(struct node_data));
+	properties = NULL;
+
+	if (adapter == NULL) {
+		if (errno == ENOMEM || errno == EBUSY)
+			goto error_errno;
+		else
+			goto error_usage;
+	}
+
+	nd = pw_adapter_get_user_data(adapter);
+	nd->data = d;
+	nd->adapter = adapter;
+	nd->follower = follower;
+	nd->handle = handle;
+	nd->resource = resource;
+	nd->new_id = new_id;
+	nd->linger = linger;
+	spa_list_append(&d->node_list, &nd->link);
+
+	pw_impl_node_add_listener(adapter, &nd->adapter_listener, &node_events, nd);
+
+	if (do_register)
+		pw_impl_node_register(adapter, NULL);
+	else
+		pw_impl_node_initialized(adapter);
+
+	return adapter;
+
+error_properties:
+	res = -EINVAL;
+	pw_resource_errorf_id(resource, new_id, res, "usage: " FACTORY_USAGE);
+	goto error_cleanup;
+error_errno:
+	res = -errno;
+error_res:
+	pw_resource_errorf_id(resource, new_id, res, "can't create node: %s", spa_strerror(res));
+	goto error_cleanup;
+error_usage:
+	res = -EINVAL;
+	pw_log_error("usage: "ADAPTER_USAGE);
+	pw_resource_errorf_id(resource, new_id, res, "usage: "ADAPTER_USAGE);
+	goto error_cleanup;
+error_cleanup:
+	pw_properties_free(properties);
+	if (handle)
+		pw_unload_spa_handle(handle);
+	errno = -res;
+	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;
+	struct node_data *nd;
+
+	spa_hook_remove(&d->factory_listener);
+
+	spa_list_consume(nd, &d->node_list, link)
+		pw_impl_node_destroy(nd->adapter);
+
+	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;
+
+	pw_log_debug("%p: destroy", d);
+	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("%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,
+};
+
+SPA_EXPORT
+int pipewire__module_init(struct pw_impl_module *module, const char *args)
+{
+	struct pw_context *context = pw_impl_module_get_context(module);
+	struct pw_impl_factory *factory;
+	struct factory_data *data;
+
+	PW_LOG_TOPIC_INIT(mod_topic);
+
+	factory = pw_context_create_factory(context,
+				 "adapter",
+				 PW_TYPE_INTERFACE_Node,
+				 PW_VERSION_NODE,
+				 pw_properties_new(
+					 PW_KEY_FACTORY_USAGE, FACTORY_USAGE,
+					 NULL),
+				 sizeof(*data));
+	if (factory == NULL)
+		return -errno;
+
+	data = pw_impl_factory_get_user_data(factory);
+	data->factory = factory;
+	data->context = context;
+	data->module = module;
+	spa_list_init(&data->node_list);
+
+	pw_log_debug("module %p: new", module);
+
+	pw_impl_factory_add_listener(factory, &data->factory_listener,
+			&factory_events, data);
+	pw_impl_factory_set_implementation(factory,
+				      &impl_factory,
+				      data);
+
+	pw_impl_module_update_properties(module, &SPA_DICT_INIT_ARRAY(module_props));
+
+	pw_impl_module_add_listener(module, &data->module_listener, &module_events, data);
+
+	return 0;
+}