From 3be0cfe09c2db48db353fc19e596bd9f315eff58 Mon Sep 17 00:00:00 2001
From: pstef <3462925+pstef@users.noreply.github.com>
Date: Thu, 20 Mar 2025 21:44:39 +0000
Subject: [PATCH] Allow frame_time_accumulator to go negative

to be able to catch the underflow and correct it.
---
 gfx/video_driver.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gfx/video_driver.c b/gfx/video_driver.c
index b54779c8e7..436b018526 100644
--- a/gfx/video_driver.c
+++ b/gfx/video_driver.c
@@ -3645,7 +3645,7 @@ void video_driver_frame(const void *data, unsigned width,
    static retro_time_t curr_time;
    static retro_time_t fps_time;
    static float last_fps, frame_time;
-   static uint16_t frame_time_accumulator;
+   static int32_t frame_time_accumulator;
    /* Mark the start of nonblock state for
     * ignoring initial previous frame time */
    static int8_t nonblock_active;
@@ -3729,7 +3729,7 @@ void video_driver_frame(const void *data, unsigned width,
             || (last_frame_duped && !!data))
       )
    {
-      uint16_t frame_time_accumulator_prev = frame_time_accumulator;
+      int32_t frame_time_accumulator_prev  = frame_time_accumulator;
       uint16_t frame_time_delta            = new_time - last_time;
       uint16_t frame_time_target           = video_info.frame_time_target;