requesthandler: Add replay buffer requests

src/requesthandler/RequestHandler.cpp

@@ -131,6 +131,12 @@ const std::unordered_map<std::string, RequestMethodHandler> RequestHandler::_han
 	{"ToggleVirtualCam", &RequestHandler::ToggleVirtualCam},
 	{"StartVirtualCam", &RequestHandler::StartVirtualCam},
 	{"StopVirtualCam", &RequestHandler::StopVirtualCam},
+	{"GetReplayBufferStatus", &RequestHandler::GetReplayBufferStatus},
+	{"ToggleReplayBuffer", &RequestHandler::ToggleReplayBuffer},
+	{"StartReplayBuffer", &RequestHandler::StartReplayBuffer},
+	{"StopReplayBuffer", &RequestHandler::StopReplayBuffer},
+	{"SaveReplayBuffer", &RequestHandler::SaveReplayBuffer},
+	{"GetLastReplayBufferReplay", &RequestHandler::GetLastReplayBufferReplay},
 
 	// Stream
 	{"GetStreamStatus", &RequestHandler::GetStreamStatus},

src/requesthandler/RequestHandler.h

@@ -149,6 +149,12 @@ class RequestHandler {
 		RequestResult ToggleVirtualCam(const Request&);
 		RequestResult StartVirtualCam(const Request&);
 		RequestResult StopVirtualCam(const Request&);
+		RequestResult GetReplayBufferStatus(const Request&);
+		RequestResult ToggleReplayBuffer(const Request&);
+		RequestResult StartReplayBuffer(const Request&);
+		RequestResult StopReplayBuffer(const Request&);
+		RequestResult SaveReplayBuffer(const Request&);
+		RequestResult GetLastReplayBufferReplay(const Request&);
 
 		// Stream
 		RequestResult GetStreamStatus(const Request&);

src/requesthandler/RequestHandler_Outputs.cpp

@@ -28,6 +28,12 @@ static bool VirtualCamAvailable()
 	return obs_data_get_bool(privateData, "vcamEnabled");
 }
 
+static bool ReplayBufferAvailable()
+{
+	OBSOutputAutoRelease output = obs_frontend_get_replay_buffer_output();
+	return output != nullptr;
+}
+
 /**
  * Gets the status of the virtualcam output.
  *
@@ -124,3 +130,148 @@ RequestResult RequestHandler::StopVirtualCam(const Request&)
 
 	return RequestResult::Success();
 }
+
+/**
+ * Gets the status of the replay buffer output.
+ *
+ * @responseField outputActive | Boolean | Whether the output is active
+ *
+ * @requestType GetReplayBufferStatus
+ * @complexity 1
+ * @rpcVersion -1
+ * @initialVersion 5.0.0
+ * @category outputs
+ * @api requests
+ */
+RequestResult RequestHandler::GetReplayBufferStatus(const Request&)
+{
+	if (!ReplayBufferAvailable())
+		return RequestResult::Error(RequestStatus::InvalidResourceState, "Replay buffer is not available.");
+
+	json responseData;
+	responseData["outputActive"] = obs_frontend_replay_buffer_active();
+	return RequestResult::Success(responseData);
+}
+
+/**
+ * Toggles the state of the replay buffer output.
+ *
+ * @responseField outputActive | Boolean | Whether the output is active
+ *
+ * @requestType ToggleReplayBuffer
+ * @complexity 1
+ * @rpcVersion -1
+ * @initialVersion 5.0.0
+ * @category outputs
+ * @api requests
+ */
+RequestResult RequestHandler::ToggleReplayBuffer(const Request&)
+{
+	if (!ReplayBufferAvailable())
+		return RequestResult::Error(RequestStatus::InvalidResourceState, "Replay buffer is not available.");
+
+	bool outputActive = obs_frontend_replay_buffer_active();
+
+	if (outputActive)
+		obs_frontend_replay_buffer_stop();
+	else
+		obs_frontend_replay_buffer_start();
+
+	json responseData;
+	responseData["outputActive"] = !outputActive;
+	return RequestResult::Success(responseData);
+}
+
+/**
+ * Starts the replay buffer output.
+ *
+ * @requestType StartReplayBuffer
+ * @complexity 1
+ * @rpcVersion -1
+ * @initialVersion 5.0.0
+ * @api requests
+ * @category outputs
+ */
+RequestResult RequestHandler::StartReplayBuffer(const Request&)
+{
+	if (!ReplayBufferAvailable())
+		return RequestResult::Error(RequestStatus::InvalidResourceState, "Replay buffer is not available.");
+
+	if (obs_frontend_replay_buffer_active())
+		return RequestResult::Error(RequestStatus::OutputRunning);
+
+	obs_frontend_replay_buffer_start();
+
+	return RequestResult::Success();
+}
+
+/**
+ * Stops the replay buffer output.
+ *
+ * @requestType StopReplayBuffer
+ * @complexity 1
+ * @rpcVersion -1
+ * @initialVersion 5.0.0
+ * @api requests
+ * @category outputs
+ */
+RequestResult RequestHandler::StopReplayBuffer(const Request&)
+{
+	if (!ReplayBufferAvailable())
+		return RequestResult::Error(RequestStatus::InvalidResourceState, "Replay buffer is not available.");
+
+	if (!obs_frontend_replay_buffer_active())
+		return RequestResult::Error(RequestStatus::OutputNotRunning);
+
+	obs_frontend_replay_buffer_stop();
+
+	return RequestResult::Success();
+}
+
+/**
+ * Saves the contents of the replay buffer output.
+ *
+ * @requestType SaveReplayBuffer
+ * @complexity 1
+ * @rpcVersion -1
+ * @initialVersion 5.0.0
+ * @api requests
+ * @category outputs
+ */
+RequestResult RequestHandler::SaveReplayBuffer(const Request&)
+{
+	if (!ReplayBufferAvailable())
+		return RequestResult::Error(RequestStatus::InvalidResourceState, "Replay buffer is not available.");
+
+	if (!obs_frontend_replay_buffer_active())
+		return RequestResult::Error(RequestStatus::OutputNotRunning);
+
+	obs_frontend_replay_buffer_save();
+
+	return RequestResult::Success();
+}
+
+/**
+ * Gets the filename of the last replay buffer save file.
+ *
+ * @responseField savedReplayPath | String | File path
+ *
+ * @requestType GetLastReplayBufferReplay
+ * @complexity 2
+ * @rpcVersion -1
+ * @initialVersion 5.0.0
+ * @api requests
+ * @category outputs
+ */
+RequestResult RequestHandler::GetLastReplayBufferReplay(const Request&)
+{
+	if (!ReplayBufferAvailable())
+		return RequestResult::Error(RequestStatus::InvalidResourceState, "Replay buffer is not available.");
+
+	if (!obs_frontend_replay_buffer_active())
+		return RequestResult::Error(RequestStatus::OutputNotRunning);
+
+	json responseData;
+	responseData["savedReplayPath"] = Utils::Obs::StringHelper::GetLastReplayBufferFilePath();
+	return RequestResult::Success(responseData);
+}

src/utils/Obs_StringHelper.cpp

@@ -120,12 +120,19 @@ std::string Utils::Obs::StringHelper::GetMediaInputState(obs_source_t *input)
 std::string Utils::Obs::StringHelper::GetLastReplayBufferFilePath()
 {
 	OBSOutputAutoRelease output = obs_frontend_get_replay_buffer_output();
+	if (!output)
+		return "";
+
 	calldata_t cd = {0};
 	proc_handler_t *ph = obs_output_get_proc_handler(output);
 	proc_handler_call(ph, "get_last_replay", &cd);
-	auto ret = calldata_string(&cd, "path");
+	const char *savedReplayPath = calldata_string(&cd, "path");
 	calldata_free(&cd);
-	return ret;
+
+	if (!savedReplayPath)
+		return "";
+
+	return savedReplayPath;
 }
 
 std::string Utils::Obs::StringHelper::GetSceneItemBoundsType(enum obs_bounds_type type)