protos: add component_metadata and component_metadata_server

protos/component_metadata/component_metadata.proto

@@ -0,0 +1,75 @@
+syntax = "proto3";
+
+package mavsdk.rpc.component_metadata;
+
+import "mavsdk_options.proto";
+
+option java_package = "io.mavsdk.component_metadata";
+option java_outer_classname = "ComponentMetadataProto";
+
+// Access component metadata json definitions, such as parameters.
+service ComponentMetadataService {
+
+    /*
+     * Request metadata from a specific component
+     */
+    rpc RequestComponent(RequestComponentRequest) returns(EmptyResponse) { option (mavsdk.options.async_type) = SYNC; }
+
+    /*
+     * Request metadata from the autopilot component
+     */
+    rpc RequestAutopilotComponent(EmptyRequest) returns(EmptyResponse) { option (mavsdk.options.async_type) = SYNC; }
+
+    /*
+     * Register a callback that gets called when metadata is available
+     */
+    rpc SubscribeMetadataAvailable(MetadataAvailableRequest) returns(stream MetadataUpdateResponse) { option (mavsdk.options.async_type) = ASYNC; }
+
+    /*
+     * Request metadata from the autopilot component
+     */
+    rpc GetMetadata(GetMetadataRequest) returns(GetMetadataResponse) { option (mavsdk.options.async_type) = SYNC; }
+}
+
+message RequestComponentRequest {
+    uint32 compid = 1; // The component ID to request
+}
+
+message GetMetadataRequest {
+    uint32 compid = 1; // The component ID to request
+    MetadataType type = 2; // The metadata type
+}
+
+message GetMetadataResponse {
+    MetadataData response = 1;
+}
+
+// Metadata response
+message MetadataData {
+    bool success = 1; // true if the metadata is available
+    string json_metadata = 2; // The JSON metadata
+}
+
+message EmptyRequest {}
+
+message EmptyResponse {}
+
+message MetadataAvailableRequest {}
+
+
+message MetadataUpdateResponse {
+    MetadataUpdate data = 1;
+}
+
+// Metadata for a given component and type
+message MetadataUpdate {
+    uint32 compid = 1; // The component ID
+    MetadataType type = 2; // The metadata type
+    string json_metadata = 3; // The JSON metadata
+}
+
+enum MetadataType {
+    PARAMETER = 0; // Parameter metadata
+    EVENTS = 1; // Event definitions
+    ACTUATORS = 2; // Actuator definitions
+}

protos/component_metadata_server/component_metadata_server.proto

@@ -0,0 +1,32 @@
+syntax = "proto3";
+
+package mavsdk.rpc.component_metadata_server;
+
+import "mavsdk_options.proto";
+
+option java_package = "io.mavsdk.component_metadata_server";
+option java_outer_classname = "ComponentMetadataServerProto";
+
+// Provide component metadata json definitions, such as parameters.
+service ComponentMetadataServerService {
+    /*
+     * Provide metadata (can only be called once)
+     */
+    rpc SetMetadata(RequestComponentRequest) returns(EmptyResponse) { option (mavsdk.options.async_type) = SYNC; }
+}
+
+message RequestComponentRequest {
+    repeated Metadata metadata = 1; // List of metadata
+}
+message EmptyResponse {}
+
+message Metadata {
+    MetadataType type = 1; // The metadata type
+    string json_metadata = 2; // The JSON metadata
+}
+
+enum MetadataType {
+    PARAMETER = 0; // Parameter metadata
+    EVENTS = 1; // Event definitions
+    ACTUATORS = 2; // Actuator definitions
+}