Update OSD API

Author: kevinlookl

Arduino_package/hardware/libraries/Multimedia/src/VideoStreamOverlay.cpp

@@ -101,3 +101,8 @@ void VideoStreamOverlay::update(int ch, int idx)
 {
     canvas_update(ch, idx, 1);
 }
+
+void VideoStreamOverlay::update(int ch, int ready_to_update, int idx)
+{
+    canvas_update(ch, idx, ready_to_update);
+}

Arduino_package/hardware/libraries/Multimedia/src/VideoStreamOverlay.h

@@ -47,6 +47,7 @@ class VideoStreamOverlay {
     void drawRect(int ch, int xmin, int ymin, int xmax, int ymax, int line_width, uint32_t color, int idx = 0);
     void drawText(int ch, int xmin, int ymin, const char *text_string, uint32_t color, int idx = 0);
     void update(int ch, int idx = 0);
+    void update(int ch, int ready_to_update, int idx = 0);
 
 private:
     int ch_enable[3] = {0};