libobs: Add obs_view_enum_video_info

libobs/obs-view.c

@@ -218,3 +218,21 @@ bool obs_view_get_video_info(obs_view_t *view, struct obs_video_info *ovi)
 
 	return false;
 }
+
+void obs_view_enum_video_info(obs_view_t *view,
+			      bool (*enum_proc)(void *,
+						struct obs_video_info *),
+			      void *param)
+{
+	pthread_mutex_lock(&obs->video.mixes_mutex);
+
+	for (size_t i = 0, num = obs->video.mixes.num; i < num; i++) {
+		struct obs_core_video_mix *mix = obs->video.mixes.array[i];
+		if (mix->view != view)
+			continue;
+		if (!enum_proc(param, &mix->ovi))
+			break;
+	}
+
+	pthread_mutex_unlock(&obs->video.mixes_mutex);
+}

libobs/obs.h

@@ -955,6 +955,12 @@ EXPORT void obs_view_remove(obs_view_t *view);
 EXPORT bool obs_view_get_video_info(obs_view_t *view,
 				    struct obs_video_info *ovi);
 
+/** Enumerate the video info of all mixes using the specified view context */
+EXPORT void obs_view_enum_video_info(obs_view_t *view,
+				     bool (*enum_proc)(void *,
+						       struct obs_video_info *),
+				     void *param);
+
 /* ------------------------------------------------------------------------- */
 /* Display context */