endpoint: make endpoints of alsa devices

Make one endpoint for each device
Make a stream for each node

src/examples/media-session/alsa-endpoint.c

@@ -0,0 +1,186 @@
+/* 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 <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <math.h>
+#include <time.h>
+
+#include "config.h"
+
+#include <alsa/use-case.h>
+#include <alsa/asoundlib.h>
+
+#include <spa/node/node.h>
+#include <spa/utils/hook.h>
+#include <spa/utils/names.h>
+#include <spa/utils/keys.h>
+#include <spa/param/audio/format-utils.h>
+#include <spa/param/props.h>
+#include <spa/debug/dict.h>
+
+#include "pipewire/pipewire.h"
+#include "pipewire/private.h"
+
+static int client_endpoint_set_id(void *object, uint32_t id)
+{
+	struct alsa_object *obj = object;
+
+	obj->client_endpoint_info.id = id;
+	obj->client_endpoint_info.name = (char*)pw_properties_get(obj->props, PW_KEY_DEVICE_DESCRIPTION);
+	obj->client_endpoint_info.media_class = (char*)pw_properties_get(obj->props, PW_KEY_MEDIA_CLASS);
+
+	pw_client_endpoint_proxy_update(obj->client_endpoint,
+			PW_CLIENT_ENDPOINT_UPDATE_INFO,
+			0, NULL,
+			&obj->client_endpoint_info);
+	return 0;
+}
+
+static int client_endpoint_set_session_id(void *object, uint32_t id)
+{
+	struct alsa_object *obj = object;
+	obj->client_endpoint_info.session_id = id;
+	return 0;
+}
+
+static int client_endpoint_set_param(void *object,
+		uint32_t id, uint32_t flags, const struct spa_pod *param)
+{
+	return -ENOTSUP;
+}
+
+
+static int client_endpoint_stream_set_param(void *object, uint32_t stream_id,
+		uint32_t id, uint32_t flags, const struct spa_pod *param)
+{
+	return -ENOTSUP;
+}
+
+
+static const struct pw_client_endpoint_proxy_events client_endpoint_events = {
+	PW_VERSION_CLIENT_ENDPOINT_PROXY_EVENTS,
+	.set_id = client_endpoint_set_id,
+	.set_session_id = client_endpoint_set_session_id,
+	.set_param = client_endpoint_set_param,
+	.stream_set_param = client_endpoint_stream_set_param,
+};
+
+static int setup_alsa_fallback_endpoint(struct alsa_object *obj)
+{
+	struct alsa_node *n;
+
+	spa_list_for_each(n, &obj->node_list, link) {
+		n->info.version = PW_VERSION_ENDPOINT_STREAM_INFO;
+		n->info.id = n->id;
+		n->info.endpoint_id = obj->client_endpoint_info.id;
+		n->info.name = (char*)pw_properties_get(n->props, PW_KEY_NODE_DESCRIPTION);
+		n->info.change_mask = PW_ENDPOINT_STREAM_CHANGE_MASK_PROPS;
+		n->info.props = &n->props->dict;
+
+		pw_log_debug("stream %d", n->id);
+		pw_client_endpoint_proxy_stream_update(obj->client_endpoint,
+				n->id,
+				PW_CLIENT_ENDPOINT_STREAM_UPDATE_INFO,
+				0, NULL,
+				&n->info);
+	}
+	return 0;
+}
+
+static int setup_alsa_ucm_endpoint(struct alsa_object *obj)
+{
+	const char *str, *card_name = NULL;
+	char *name_free = NULL;
+	int i, res, num_verbs;
+	const char **verb_list = NULL;
+
+	card_name = pw_properties_get(obj->props, SPA_KEY_API_ALSA_CARD_NAME);
+	if (card_name == NULL &&
+	    (str = pw_properties_get(obj->props, SPA_KEY_API_ALSA_CARD)) != NULL) {
+		snd_card_get_name(atoi(str), &name_free);
+		card_name = name_free;
+		pw_log_debug("got card name %s for index %s", card_name, str);
+	}
+	if (card_name == NULL) {
+		res = -ENOTSUP;
+		goto exit;
+	}
+
+	if ((res = snd_use_case_mgr_open(&obj->ucm, card_name)) < 0) {
+		pw_log_error("can not open UCM for %s: %s", card_name, snd_strerror(res));
+		goto exit;
+	}
+
+	num_verbs = snd_use_case_verb_list(obj->ucm, &verb_list);
+	if (num_verbs < 0) {
+		res = num_verbs;
+		pw_log_error("UCM verb list not found for %s: %s", card_name, snd_strerror(num_verbs));
+		goto close_exit;
+	}
+
+	for (i = 0; i < num_verbs; i++) {
+		pw_log_debug("verb: %s", verb_list[i]);
+	}
+
+	obj->use_ucm = true;
+
+	snd_use_case_free_list(verb_list, num_verbs);
+
+	return 0;
+close_exit:
+	snd_use_case_mgr_close(obj->ucm);
+exit:
+	obj->ucm = NULL;
+	free(name_free);
+	return res;
+
+}
+
+static int setup_alsa_endpoint(struct alsa_object *obj)
+{
+	struct impl *impl = obj->monitor->impl;
+	int res;
+
+	obj->client_endpoint = pw_core_proxy_create_object(impl->core_proxy,
+						"client-endpoint",
+						PW_TYPE_INTERFACE_ClientEndpoint,
+						PW_VERSION_CLIENT_ENDPOINT_PROXY,
+						&obj->props->dict, 0);
+
+	obj->client_endpoint_info.version = PW_VERSION_ENDPOINT_INFO;
+	obj->client_endpoint_info.name = "name";
+	obj->client_endpoint_info.media_class = "media-class";
+
+	pw_client_endpoint_proxy_add_listener(obj->client_endpoint,
+			&obj->client_endpoint_listener,
+			&client_endpoint_events,
+			obj);
+
+	if ((res = setup_alsa_ucm_endpoint(obj)) < 0)
+		res = setup_alsa_fallback_endpoint(obj);
+
+	return res;
+}