monitor: add missing file

1 files changed, 84 insertions, 0 deletions

diff --git a/spa/include/spa/monitor/utils.h b/spa/include/spa/monitor/utils.h
new file mode 100644
index 00000000..36bf499b
--- /dev/null
+++ b/spa/include/spa/monitor/utils.h
@@ -0,0 +1,84 @@
+/* Simple Plugin API
+ *
+ * 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.
+ */
+
+#ifndef SPA_NODE_UTILS_H
+#define SPA_NODE_UTILS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <spa/monitor/device.h>
+
+struct spa_result_device_params_data {
+	struct spa_pod_builder *builder;
+	struct spa_result_device_params data;
+};
+
+static inline int spa_result_func_device_params(struct spa_pending *pending,
+		const void *result)
+{
+	struct spa_result_device_params_data *d =
+		(struct spa_result_device_params_data *)pending->data;
+	const struct spa_result_device_params *r =
+		(const struct spa_result_device_params *)result;
+	uint32_t offset = d->builder->state.offset;
+	spa_pod_builder_raw_padded(d->builder, r->param, SPA_POD_SIZE(r->param));
+	d->data.next = r->next;
+	d->data.param = SPA_MEMBER(d->builder->data, offset, struct spa_pod);
+	return 0;
+}
+
+static inline int spa_device_enum_params_sync(struct spa_device *device,
+			uint32_t id, uint32_t *index,
+			const struct spa_pod *filter,
+			struct spa_pod **param,
+			struct spa_pod_builder *builder,
+			struct spa_pending_queue *queue)
+{
+	struct spa_result_device_params_data data = { builder, };
+	struct spa_pending pending;
+	int res;
+
+	spa_pending_queue_add(queue, 0, &pending,
+			spa_result_func_device_params, &data);
+	res = spa_device_enum_params(device, 0, id, *index, 1, filter);
+	spa_pending_remove(&pending);
+
+	if (data.data.param == NULL) {
+		if (res > 0)
+			res = 0;
+	} else {
+		*index = data.data.next;
+		*param = data.data.param;
+		res = 1;
+	}
+	return res;
+}
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* SPA_NODE_UTILS_H */