obs-frontend-api: Add function for manual file splitting

UI/api-interface.cpp

@@ -320,6 +320,23 @@ struct OBSStudioAPI : obs_frontend_callbacks {
 		return os_atomic_load_bool(&recording_paused);
 	}
 
+	bool obs_frontend_recording_split_file(void) override
+	{
+		if (os_atomic_load_bool(&recording_active) &&
+		    !os_atomic_load_bool(&recording_paused)) {
+			proc_handler_t *ph = obs_output_get_proc_handler(
+				main->outputHandler->fileOutput);
+			uint8_t stack[128];
+			calldata cd;
+			calldata_init_fixed(&cd, stack, sizeof(stack));
+			proc_handler_call(ph, "split_file", &cd);
+			bool result = calldata_bool(&cd, "split_file_enabled");
+			return result;
+		} else {
+			return false;
+		}
+	}
+
 	void obs_frontend_replay_buffer_start(void) override
 	{
 		QMetaObject::invokeMethod(main, "StartReplayBuffer");

UI/obs-frontend-api/obs-frontend-api.cpp

@@ -279,6 +279,12 @@ bool obs_frontend_recording_paused(void)
 	return !!callbacks_valid() ? c->obs_frontend_recording_paused() : false;
 }
 
+bool obs_frontend_recording_split_file(void)
+{
+	return !!callbacks_valid() ? c->obs_frontend_recording_split_file()
+				   : false;
+}
+
 void obs_frontend_replay_buffer_start(void)
 {
 	if (callbacks_valid())

UI/obs-frontend-api/obs-frontend-api.h

@@ -177,6 +177,7 @@ EXPORT void obs_frontend_recording_stop(void);
 EXPORT bool obs_frontend_recording_active(void);
 EXPORT void obs_frontend_recording_pause(bool pause);
 EXPORT bool obs_frontend_recording_paused(void);
+EXPORT bool obs_frontend_recording_split_file(void);
 
 EXPORT void obs_frontend_replay_buffer_start(void);
 EXPORT void obs_frontend_replay_buffer_save(void);

UI/obs-frontend-api/obs-frontend-internal.hpp

@@ -52,6 +52,7 @@ struct obs_frontend_callbacks {
 	virtual bool obs_frontend_recording_active(void) = 0;
 	virtual void obs_frontend_recording_pause(bool pause) = 0;
 	virtual bool obs_frontend_recording_paused(void) = 0;
+	virtual bool obs_frontend_recording_split_file(void) = 0;
 
 	virtual void obs_frontend_replay_buffer_start(void) = 0;
 	virtual void obs_frontend_replay_buffer_save(void) = 0;

docs/sphinx/reference-frontend-api.rst

@@ -553,6 +553,17 @@ Functions
 
 ---------------------------------------
 
+.. function:: bool obs_frontend_recording_split_file(void)
+
+   Asks OBS to split the current recording file.
+
+   :return: *true* if splitting was successfully requested (this
+            does not mean that splitting has finished or guarantee that it
+            split successfully), *false* if recording is inactive or paused
+            or if file splitting is disabled.
+
+---------------------------------------
+
 .. function:: void obs_frontend_replay_buffer_start(void)
 
    Starts the replay buffer.