libobs: Rename obs_video_thread to obs_graphics_thread

This is to prevent confusion with video_thread in
libobs/media-io/video-io.c, which is used exclusively for video
encoding/output.  Also prevents confusion in the profiler log data.

libobs/obs-internal.h

@@ -394,7 +394,7 @@ struct obs_core {
 
 extern struct obs_core *obs;
 
-extern void *obs_video_thread(void *param);
+extern void *obs_graphics_thread(void *param);
 
 extern gs_effect_t *obs_load_effect(gs_effect_t **effect, const char *file);
 

libobs/obs-video.c

@@ -585,7 +585,7 @@ static inline void output_frame(void)
 static const char *tick_sources_name = "tick_sources";
 static const char *render_displays_name = "render_displays";
 static const char *output_frame_name = "output_frame";
-void *obs_video_thread(void *param)
+void *obs_graphics_thread(void *param)
 {
 	uint64_t last_time = 0;
 	uint64_t interval = video_output_get_frame_time(obs->video.video);
@@ -599,7 +599,7 @@ void *obs_video_thread(void *param)
 
 	const char *video_thread_name =
 		profile_store_name(obs_get_profiler_name_store(),
-			"obs_video_thread(%g"NBSP"ms)", interval / 1000000.);
+			"obs_graphics_thread(%g"NBSP"ms)", interval / 1000000.);
 	profile_register_root(video_thread_name, interval);
 
 	srand((unsigned int)time(NULL));

libobs/obs.c

@@ -385,7 +385,7 @@ static int obs_init_video(struct obs_video_info *ovi)
 	gs_leave_context();
 
 	errorcode = pthread_create(&video->video_thread, NULL,
-			obs_video_thread, obs);
+			obs_graphics_thread, obs);
 	if (errorcode != 0)
 		return OBS_VIDEO_FAIL;