RequestHandler: Add SendStreamCaption

src/requesthandler/RequestHandler.cpp

@@ -143,6 +143,7 @@ const std::unordered_map<std::string, RequestMethodHandler> RequestHandler::_han
 	{"ToggleStream", &RequestHandler::ToggleStream},
 	{"StartStream", &RequestHandler::StartStream},
 	{"StopStream", &RequestHandler::StopStream},
+	{"SendStreamCaption", &RequestHandler::SendStreamCaption},
 
 	// Record
 	{"GetRecordStatus", &RequestHandler::GetRecordStatus},

src/requesthandler/RequestHandler.h

@@ -161,6 +161,7 @@ class RequestHandler {
 		RequestResult ToggleStream(const Request&);
 		RequestResult StartStream(const Request&);
 		RequestResult StopStream(const Request&);
+		RequestResult SendStreamCaption(const Request&);
 
 		// Record
 		RequestResult GetRecordStatus(const Request&);

src/requesthandler/RequestHandler_Stream.cpp

@@ -122,3 +122,35 @@ RequestResult RequestHandler::StopStream(const Request&)
 
 	return RequestResult::Success();
 }
+
+/**
+ * Sends CEA-608 caption text over the stream output.
+ *
+ * @requestField captionText | String | Caption text
+ *
+ * @requestType SendStreamCaption
+ * @complexity 2
+ * @rpcVersion -1
+ * @initialVersion 5.0.0
+ * @category stream
+ * @api requests
+ */
+RequestResult RequestHandler::SendStreamCaption(const Request& request)
+{
+	RequestStatus::RequestStatus statusCode;
+	std::string comment;
+	if (!request.ValidateString("captionText", statusCode, comment, true))
+		return RequestResult::Error(statusCode, comment);
+
+	if (!obs_frontend_streaming_active())
+		return RequestResult::Error(RequestStatus::OutputNotRunning);
+
+	std::string captionText = request.RequestData["captionText"];
+
+	OBSOutputAutoRelease output = obs_frontend_get_streaming_output();
+
+	// 0.0 means no delay until the next caption can be sent
+	obs_output_output_caption_text2(output, captionText.c_str(), 0.0);
+
+	return RequestResult::Success();
+}