Set various thread names

Helps identify which threads are which when debugging

libobs/media-io/audio-io.c

@@ -354,6 +354,8 @@ static void *audio_thread(void *param)
 	uint64_t prev_time = os_gettime_ns() - buffer_time;
 	uint64_t audio_time;
 
+	os_set_thread_name("audio-io: audio thread");
+
 	while (os_event_try(audio->stop_event) == EAGAIN) {
 		os_sleep_ms(AUDIO_WAIT_TIME);
 

libobs/media-io/video-io.c

@@ -160,6 +160,8 @@ static void *video_thread(void *param)
 {
 	struct video_output *video = param;
 
+	os_set_thread_name("video-io: video thread");
+
 	while (os_sem_wait(video->update_semaphore) == 0) {
 		if (video->stop)
 			break;

libobs/obs-video.c

@@ -537,6 +537,8 @@ void *obs_video_thread(void *param)
 	uint64_t cur_time = os_gettime_ns();
 	uint64_t interval = video_output_get_frame_time(obs->video.video);
 
+	os_set_thread_name("libobs: graphics thread");
+
 	while (!video_output_stopped(obs->video.video)) {
 		last_time = tick_sources(cur_time, last_time);