Register buffer_lock as a global output

output/rtsp/rtsp.h

@@ -5,6 +5,3 @@ typedef struct rtsp_options_s {
 } rtsp_options_t;
 
 int rtsp_server(rtsp_options_t *options);
-bool rtsp_h264_needs_buffer();
-void rtsp_h264_capture(struct buffer_s *buf);
-void rtsp_h264_low_res_capture(struct buffer_s *buf);