155 lines
4.3 KiB
C
155 lines
4.3 KiB
C
/* WirePlumber
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*
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* Copyright © 2019 Collabora Ltd.
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* @author George Kiagiadakis <george.kiagiadakis@collabora.com>
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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/**
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* module-pw-alsa-udev provides alsa device detection through pipewire
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* and automatically creates endpoints for all alsa device nodes that appear
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*/
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#include <wp/wp.h>
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#include <pipewire/pipewire.h>
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#define NAME "module-pw-alsa-udev"
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struct impl {
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WpCore *wp_core;
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struct pw_remote *remote;
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struct spa_hook remote_listener;
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struct pw_registry_proxy *registry_proxy;
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struct spa_hook registry_listener;
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};
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static void
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handle_node(struct impl *impl, uint32_t id, uint32_t parent_id,
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const struct spa_dict *props)
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{
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const gchar *media_class = NULL, *node_name = NULL;
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struct spa_proxy *proxy = NULL;
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GVariantBuilder b;
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g_autoptr(GVariant) endpoint_props = NULL;
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g_autoptr (WpEndpoint) endpoint = NULL;
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WpSessionManager *sm;
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/* Make sure the node has properties */
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if (!props) {
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g_warning(NAME" %p: node has no properties, skipping...", impl);
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return;
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}
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/* Make sure the media class is audio */
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/* FIXME: need to handle only alsa nodes */
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media_class = spa_dict_lookup(props, "media.class");
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if (!g_str_has_prefix (media_class, "Audio/"))
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return;
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/* Get the device name */
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node_name = spa_dict_lookup(props, "node.name");
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/* Get the proxy */
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proxy = pw_registry_proxy_bind (impl->registry_proxy, id,
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PW_TYPE_INTERFACE_Node, PW_VERSION_NODE, 0);
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/* Build the GVariant properties for the endpoint */
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g_variant_builder_init (&b, G_VARIANT_TYPE_VARDICT);
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g_variant_builder_add (&b, "{sv}", "name",
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g_variant_new_take_string (g_strdup_printf ("Endpoint %u: %s", id, node_name)));
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g_variant_builder_add (&b, "{sv}",
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"media-class", g_variant_new_string (media_class));
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g_variant_builder_add (&b, "{sv}",
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"node-proxy", g_variant_new_uint64 ((guint64) proxy));
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endpoint_props = g_variant_builder_end (&b);
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sm = wp_core_get_global (impl->wp_core, WP_GLOBAL_SESSION_MANAGER);
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g_return_if_fail (sm != NULL);
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/* Create the endpoint */
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endpoint = wp_factory_make (impl->wp_core, "pw-audio-softdsp-endpoint",
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WP_TYPE_ENDPOINT, endpoint_props);
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wp_endpoint_register (endpoint, sm);
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}
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static void
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registry_global(void *data,uint32_t id, uint32_t parent_id,
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uint32_t permissions, uint32_t type, uint32_t version,
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const struct spa_dict *props)
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{
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struct impl *impl = data;
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/* Only handle nodes */
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switch (type) {
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case PW_TYPE_INTERFACE_Node:
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handle_node(impl, id, parent_id, props);
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break;
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default:
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break;
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}
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}
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static const struct pw_registry_proxy_events registry_events = {
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PW_VERSION_REGISTRY_PROXY_EVENTS,
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.global = registry_global,
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};
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static void on_state_changed(void *_data, enum pw_remote_state old,
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enum pw_remote_state state, const char *error)
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{
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struct impl *impl = _data;
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struct pw_core_proxy *core_proxy;
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switch (state) {
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case PW_REMOTE_STATE_CONNECTED:
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core_proxy = pw_remote_get_core_proxy (impl->remote);
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impl->registry_proxy = pw_core_proxy_get_registry (core_proxy,
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PW_TYPE_INTERFACE_Registry, PW_VERSION_REGISTRY, 0);
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pw_registry_proxy_add_listener(impl->registry_proxy,
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&impl->registry_listener, ®istry_events, impl);
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break;
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default:
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break;
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}
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}
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static const struct pw_remote_events remote_events = {
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PW_VERSION_REMOTE_EVENTS,
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.state_changed = on_state_changed,
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};
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static void
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module_destroy (gpointer data)
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{
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struct impl *impl = data;
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g_debug ("module-pipewire destroy");
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g_slice_free (struct impl, impl);
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}
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void
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wireplumber__module_init (WpModule * module, WpCore * core, GVariant * args)
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{
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/* This needs to create the alsa sink and alsa source nodes, but since
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* this is already implemented in the alsa-module of pipewire, for now
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* we just listen for the alsa nodes created by pipewire. We eventually
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* need to move all the node creation logic here */
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/* Create the impl */
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struct impl *impl = g_new0(struct impl, 1);
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impl->wp_core = core;
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impl->remote = wp_core_get_global(core, WP_GLOBAL_PW_REMOTE);
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/* Set destroy callback for impl */
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wp_module_set_destroy_callback (module, module_destroy, impl);
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/* Add a state changed listener */
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pw_remote_add_listener(impl->remote, &impl->remote_listener, &remote_events, impl);
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}
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