Redefine behavior of NULL in video_frame().

gfx/ext_gfx.c

@@ -177,6 +177,9 @@ static void video_ext_set_nonblock_state(void *data, bool state)
 
 static bool video_ext_frame(void *data, const void *frame, unsigned width, unsigned height, unsigned pitch, const char *msg)
 {
+   if (!frame)
+      return true;
+
    ext_t *ext = (ext_t*)data;
    return ext->driver->frame(ext->handle, frame, width, height, pitch, msg);
 }

gfx/gl.c

@@ -897,9 +897,11 @@ static bool gl_frame(void *data, const void *frame, unsigned width, unsigned hei
       gl_update_resize(gl);
    }
 
-   gl_update_input_size(gl, width, height, pitch);
+   if (frame) // Can be NULL for frame dupe / NULL render.
-
+   {
-   gl_copy_frame(gl, frame, width, height, pitch);
+      gl_update_input_size(gl, width, height, pitch);
+      gl_copy_frame(gl, frame, width, height, pitch);
+   }
 
    struct gl_tex_info tex_info = {0};
    tex_info.tex           = gl->texture[gl->tex_index];

gfx/sdl_gfx.c

@@ -470,6 +470,9 @@ static void check_window(sdl_video_t *vid)
 
 static bool sdl_gfx_frame(void *data, const void *frame, unsigned width, unsigned height, unsigned pitch, const char *msg)
 {
+   if (!frame)
+      return true;
+
    sdl_video_t *vid = (sdl_video_t*)data;
 
    if (SDL_MUSTLOCK(vid->buffer))

gfx/xvideo.c

@@ -700,6 +700,9 @@ static void xv_render_msg(xv_t *xv, const char *msg, unsigned width, unsigned he
 
 static bool xv_frame(void *data, const void *frame, unsigned width, unsigned height, unsigned pitch, const char *msg)
 {
+   if (!frame)
+      return true;
+
    xv_t *xv = (xv_t*)data;
 
    if (!check_resize(xv, width, height))

retroarch.c

@@ -198,27 +198,23 @@ static void video_frame(const void *data, unsigned width, unsigned height, size_
 
    // Slightly messy code,
    // but we really need to do processing before blocking on VSync for best possible scheduling.
-   bool is_dupe = !data;
 #ifdef HAVE_FFMPEG
-
+   if (g_extern.recording && (!g_extern.filter.active || !g_settings.video.post_filter_record || !data))
-   if (g_extern.recording && (!g_extern.filter.active || !g_settings.video.post_filter_record || is_dupe))
    {
       struct ffemu_video_data ffemu_data = {0};
       ffemu_data.data = data;
       ffemu_data.pitch = pitch;
       ffemu_data.width = width;
       ffemu_data.height = height;
-      ffemu_data.is_dupe = is_dupe;
+      ffemu_data.is_dupe = !data;
       ffemu_push_video(g_extern.rec, &ffemu_data);
    }
 #endif
-   if (is_dupe)
-      return;
 
    const char *msg = msg_queue_pull(g_extern.msg_queue);
 
 #ifdef HAVE_DYLIB
-   if (g_extern.filter.active)
+   if (g_extern.filter.active && data)
    {
       unsigned owidth = width;
       unsigned oheight = height;
@@ -248,10 +244,10 @@ static void video_frame(const void *data, unsigned width, unsigned height, size_
       g_extern.video_active = false;
 #endif
 
-   g_extern.frame_cache.data = data;
+   g_extern.frame_cache.data   = data;
-   g_extern.frame_cache.width = width;
+   g_extern.frame_cache.width  = width;
    g_extern.frame_cache.height = height;
-   g_extern.frame_cache.pitch = pitch;
+   g_extern.frame_cache.pitch  = pitch;
 }
 
 #ifdef HAVE_GRIFFIN