1 files changed, 292 insertions, 0 deletions
diff --git a/src/modules/spa/spa-node.c b/src/modules/spa/spa-node.c
new file mode 100644
index 0000000..1f8615b
--- /dev/null
+++ b/src/modules/spa/spa-node.c
@@ -0,0 +1,292 @@
+/* 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 "config.h"
+
+#include <string.h>
+#include <stdio.h>
+#include <dlfcn.h>
+
+#include <spa/node/node.h>
+#include <spa/node/utils.h>
+#include <spa/utils/result.h>
+#include <spa/param/props.h>
+#include <spa/pod/iter.h>
+#include <spa/debug/types.h>
+
+#include "spa-node.h"
+
+struct impl {
+	struct pw_impl_node *this;
+
+	enum pw_spa_node_flags flags;
+
+	struct spa_handle *handle;
+	struct spa_node *node;          /**< handle to SPA node */
+
+	struct spa_hook node_listener;
+	int init_pending;
+
+	void *user_data;
+
+	unsigned int async_init:1;
+};
+
+static void spa_node_free(void *data)
+{
+	struct impl *impl = data;
+	struct pw_impl_node *node = impl->this;
+
+	pw_log_debug("spa-node %p: free", node);
+
+	spa_hook_remove(&impl->node_listener);
+	if (impl->handle)
+		pw_unload_spa_handle(impl->handle);
+}
+
+static void complete_init(struct impl *impl)
+{
+        struct pw_impl_node *this = impl->this;
+
+	impl->init_pending = SPA_ID_INVALID;
+
+	if (SPA_FLAG_IS_SET(impl->flags, PW_SPA_NODE_FLAG_ACTIVATE))
+		pw_impl_node_set_active(this, true);
+
+	if (!SPA_FLAG_IS_SET(impl->flags, PW_SPA_NODE_FLAG_NO_REGISTER))
+		pw_impl_node_register(this, NULL);
+	else
+		pw_impl_node_initialized(this);
+}
+
+static void spa_node_result(void *data, int seq, int res, uint32_t type, const void *result)
+{
+	struct impl *impl = data;
+	struct pw_impl_node *node = impl->this;
+
+	if (seq == impl->init_pending) {
+		pw_log_debug("spa-node %p: init complete event %d %d", node, seq, res);
+		complete_init(impl);
+	}
+}
+
+static const struct pw_impl_node_events node_events = {
+	PW_VERSION_IMPL_NODE_EVENTS,
+	.free = spa_node_free,
+	.result = spa_node_result,
+};
+
+struct pw_impl_node *
+pw_spa_node_new(struct pw_context *context,
+		enum pw_spa_node_flags flags,
+		struct spa_node *node,
+		struct spa_handle *handle,
+		struct pw_properties *properties,
+		size_t user_data_size)
+{
+	struct pw_impl_node *this;
+	struct impl *impl;
+	int res;
+
+	this = pw_context_create_node(context, properties, sizeof(struct impl) + user_data_size);
+	if (this == NULL) {
+		res = -errno;
+		goto error_exit;
+	}
+
+	impl = pw_impl_node_get_user_data(this);
+	impl->this = this;
+	impl->node = node;
+	impl->handle = handle;
+	impl->flags = flags;
+
+	if (user_data_size > 0)
+                impl->user_data = SPA_PTROFF(impl, sizeof(struct impl), void);
+
+	pw_impl_node_add_listener(this, &impl->node_listener, &node_events, impl);
+	if ((res = pw_impl_node_set_implementation(this, impl->node)) < 0)
+		goto error_exit_clean_node;
+
+	if (flags & PW_SPA_NODE_FLAG_ASYNC) {
+		impl->init_pending = spa_node_sync(impl->node, res);
+	} else {
+		complete_init(impl);
+	}
+	return this;
+
+error_exit_clean_node:
+	pw_impl_node_destroy(this);
+	handle = NULL;
+error_exit:
+	if (handle)
+		pw_unload_spa_handle(handle);
+	errno = -res;
+	return NULL;
+
+}
+
+void *pw_spa_node_get_user_data(struct pw_impl_node *node)
+{
+	struct impl *impl = pw_impl_node_get_user_data(node);
+	return impl->user_data;
+}
+
+static int
+setup_props(struct pw_context *context, struct spa_node *spa_node, struct pw_properties *pw_props)
+{
+	int res;
+	struct spa_pod *props;
+	void *state = NULL;
+	const char *key;
+	uint32_t index = 0;
+	uint8_t buf[4096];
+	struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buf, sizeof(buf));
+	const struct spa_pod_prop *prop = NULL;
+
+	res = spa_node_enum_params_sync(spa_node,
+					SPA_PARAM_Props, &index, NULL, &props,
+					&b);
+	if (res != 1) {
+		if (res < 0)
+			pw_log_debug("spa_node_get_props result: %s", spa_strerror(res));
+		if (res == -ENOTSUP || res == -ENOENT)
+			res = 0;
+		return res;
+	}
+
+	while ((key = pw_properties_iterate(pw_props, &state))) {
+		uint32_t type = 0;
+
+		type = spa_debug_type_find_type(spa_type_props, key);
+		if (type == SPA_TYPE_None)
+			continue;
+
+		if ((prop = spa_pod_find_prop(props, prop, type))) {
+			const char *value = pw_properties_get(pw_props, key);
+
+			if (value == NULL)
+				continue;
+
+			pw_log_debug("configure prop %s to %s", key, value);
+
+			switch(prop->value.type) {
+			case SPA_TYPE_Bool:
+				SPA_POD_VALUE(struct spa_pod_bool, &prop->value) =
+					pw_properties_parse_bool(value);
+				break;
+			case SPA_TYPE_Id:
+				SPA_POD_VALUE(struct spa_pod_id, &prop->value) =
+					pw_properties_parse_int(value);
+				break;
+			case SPA_TYPE_Int:
+				SPA_POD_VALUE(struct spa_pod_int, &prop->value) =
+					pw_properties_parse_int(value);
+				break;
+			case SPA_TYPE_Long:
+				SPA_POD_VALUE(struct spa_pod_long, &prop->value) =
+					pw_properties_parse_int64(value);
+				break;
+			case SPA_TYPE_Float:
+				SPA_POD_VALUE(struct spa_pod_float, &prop->value) =
+					pw_properties_parse_float(value);
+				break;
+			case SPA_TYPE_Double:
+				SPA_POD_VALUE(struct spa_pod_double, &prop->value) =
+					pw_properties_parse_double(value);
+				break;
+			case SPA_TYPE_String:
+				break;
+			default:
+				break;
+			}
+		}
+	}
+
+	if ((res = spa_node_set_param(spa_node, SPA_PARAM_Props, 0, props)) < 0) {
+		pw_log_debug("spa_node_set_props failed: %s", spa_strerror(res));
+		return res;
+	}
+	return 0;
+}
+
+
+struct pw_impl_node *pw_spa_node_load(struct pw_context *context,
+				 const char *factory_name,
+				 enum pw_spa_node_flags flags,
+				 struct pw_properties *properties,
+				 size_t user_data_size)
+{
+	struct pw_impl_node *this;
+	struct spa_node *spa_node;
+	int res;
+	struct spa_handle *handle;
+	void *iface;
+	const struct pw_properties *p;
+
+	if (properties) {
+		p = pw_context_get_properties(context);
+		pw_properties_set(properties, "clock.quantum-limit",
+				pw_properties_get(p, "default.clock.quantum-limit"));
+	}
+
+	handle = pw_context_load_spa_handle(context,
+			factory_name,
+			properties ? &properties->dict : NULL);
+	if (handle == NULL) {
+		res = -errno;
+		goto error_exit;
+	}
+
+	if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_Node, &iface)) < 0) {
+		pw_log_error("can't get node interface %d", res);
+		goto error_exit_unload;
+	}
+	if (SPA_RESULT_IS_ASYNC(res))
+		flags |= PW_SPA_NODE_FLAG_ASYNC;
+
+	spa_node = iface;
+
+	if (properties != NULL) {
+		if ((res = setup_props(context, spa_node, properties)) < 0) {
+			pw_log_warn("can't setup properties: %s", spa_strerror(res));
+		}
+	}
+
+	this = pw_spa_node_new(context, flags,
+			       spa_node, handle, properties, user_data_size);
+	if (this == NULL) {
+		res = -errno;
+		properties = NULL;
+		goto error_exit_unload;
+	}
+
+	return this;
+
+error_exit_unload:
+	pw_unload_spa_handle(handle);
+error_exit:
+	pw_properties_free(properties);
+	errno = -res;
+	return NULL;
+}