1 files changed, 144 insertions, 0 deletions
diff --git a/src/examples/export-spa-device.c b/src/examples/export-spa-device.c
new file mode 100644
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+++ b/src/examples/export-spa-device.c
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+/* 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.
+ */
+
+/*
+ [title]
+ Exporting and loading a SPA device, using \ref api_pw_core.
+ [title]
+ */
+
+#include <stdio.h>
+#include <sys/mman.h>
+#include <signal.h>
+
+#include <spa/utils/result.h>
+#include <spa/param/video/format-utils.h>
+#include <spa/param/props.h>
+
+#include <pipewire/impl.h>
+
+struct data {
+	struct pw_main_loop *loop;
+
+	struct pw_context *context;
+
+	struct pw_core *core;
+	struct spa_hook core_listener;
+
+	struct pw_impl_device *device;
+	const char *library;
+	const char *factory;
+	const char *path;
+};
+
+static int make_device(struct data *data)
+{
+	struct pw_impl_factory *factory;
+	struct pw_properties *props;
+
+        factory = pw_context_find_factory(data->context, "spa-device-factory");
+	if (factory == NULL)
+		return -1;
+
+        props = pw_properties_new(SPA_KEY_LIBRARY_NAME, data->library,
+                                  SPA_KEY_FACTORY_NAME, data->factory, NULL);
+
+	data->device = pw_impl_factory_create_object(factory,
+					      NULL,
+					      PW_TYPE_INTERFACE_Device,
+					      PW_VERSION_DEVICE,
+					      props, SPA_ID_INVALID);
+
+	pw_core_export(data->core, SPA_TYPE_INTERFACE_Device, NULL,
+			pw_impl_device_get_implementation(data->device), 0);
+
+	return 0;
+}
+
+static void on_core_error(void *data, uint32_t id, int seq, int res, const char *message)
+{
+	struct data *d = data;
+
+	pw_log_error("error id:%u seq:%d res:%d (%s): %s",
+			id, seq, res, spa_strerror(res), message);
+
+	if (id == PW_ID_CORE)
+		pw_main_loop_quit(d->loop);
+}
+
+static const struct pw_core_events core_events = {
+	PW_VERSION_CORE_EVENTS,
+	.error = on_core_error,
+};
+
+static void do_quit(void *data, int signal_number)
+{
+        struct data *d = data;
+	pw_main_loop_quit(d->loop);
+}
+
+int main(int argc, char *argv[])
+{
+	struct data data = { 0, };
+	struct pw_loop *l;
+
+	pw_init(&argc, &argv);
+
+	if (argc < 3) {
+		fprintf(stderr, "usage: %s <library> <factory>\n\n"
+				"\texample: %s v4l2/libspa-v4l2 api.v4l2.device\n\n",
+				argv[0], argv[0]);
+		return -1;
+	}
+
+	data.loop = pw_main_loop_new(NULL);
+	l = pw_main_loop_get_loop(data.loop);
+        pw_loop_add_signal(l, SIGINT, do_quit, &data);
+        pw_loop_add_signal(l, SIGTERM, do_quit, &data);
+	data.context = pw_context_new(l, NULL, 0);
+	data.library = argv[1];
+	data.factory = argv[2];
+
+	pw_context_load_module(data.context, "libpipewire-module-spa-device-factory", NULL, NULL);
+
+        data.core = pw_context_connect(data.context, NULL, 0);
+	if (data.core == NULL) {
+		pw_log_error("can't connect %m");
+		return -1;
+	}
+
+	pw_core_add_listener(data.core, &data.core_listener, &core_events, &data);
+
+	if (make_device(&data) < 0) {
+		pw_log_error("can't make device");
+		return -1;
+	}
+
+	pw_main_loop_run(data.loop);
+
+	pw_context_destroy(data.context);
+	pw_main_loop_destroy(data.loop);
+
+	return 0;
+}