libretro: call video_cb on every frame

We need to do video_cb in retro_run every frame instead of
just once every time the video callback is called - otherwise
we will get very bad/skippy framerates.
Performance is much improved now in nearly all games.

diff --git a/frontend/libretro.c b/frontend/libretro.c
index 49e346b..e505804 100644 (file)
--- a/frontend/libretro.c
+++ b/frontend/libretro.c
@@ -62,6 +62,9 @@ static void convert(void *buf, size_t bytes)
 }
 #endif
 
+static unsigned game_width;
+static unsigned game_height;
+
 static void vout_flip(const void *vram, int stride, int bgr24, int w, int h)
 {
        unsigned short *dest = vout_buf;
@@ -94,8 +97,8 @@ out:
 #ifndef FRONTEND_SUPPORTS_RGB565
    convert(vout_buf, w * h * 2);
 #endif
-       video_cb(vout_buf, w, h, w * 2);
-       pl_rearmed_cbs.flip_cnt++;
+   game_width = w;
+   game_height = h;
 }
 
 static void vout_close(void)
@@ -353,6 +356,8 @@ void retro_run(void)
        psxCpu->Execute();
 
        samples_to_send += 44100 / 60;
+       video_cb(vout_buf, game_width, game_height, game_width * 2);
+       pl_rearmed_cbs.flip_cnt++;
 }
 
 void retro_init(void)