lavfi: merge start_frame/draw_slice/end_frame

Any alleged performance benefits gained from the split are purely
mythological and do not justify added code complexity.

1 files changed, 6 insertions, 19 deletions

diff --git a/libavfilter/vf_vflip.c b/libavfilter/vf_vflip.c
index f12290aa03..5e6e9653bd 100644
--- a/libavfilter/vf_vflip.c
+++ b/libavfilter/vf_vflip.c
@@ -69,41 +69,28 @@ static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms,
     return picref;
 }
 
-static int start_frame(AVFilterLink *link, AVFilterBufferRef *inpicref)
+static int filter_frame(AVFilterLink *link, AVFilterBufferRef *frame)
 {
     FlipContext *flip = link->dst->priv;
-    AVFilterBufferRef *outpicref = avfilter_ref_buffer(inpicref, ~0);
     int i;
 
-    if (!outpicref)
-        return AVERROR(ENOMEM);
-
     for (i = 0; i < 4; i ++) {
         int vsub = i == 1 || i == 2 ? flip->vsub : 0;
 
-        if (outpicref->data[i]) {
-            outpicref->data[i] += ((link->h >> vsub)-1) * outpicref->linesize[i];
-            outpicref->linesize[i] = -outpicref->linesize[i];
+        if (frame->data[i]) {
+            frame->data[i] += ((link->h >> vsub)-1) * frame->linesize[i];
+            frame->linesize[i] = -frame->linesize[i];
         }
     }
 
-    return ff_start_frame(link->dst->outputs[0], outpicref);
-}
-
-static int draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
-{
-    AVFilterContext *ctx = link->dst;
-
-    return ff_draw_slice(ctx->outputs[0], link->h - (y+h), h, -1 * slice_dir);
+    return ff_filter_frame(link->dst->outputs[0], frame);
 }
-
 static const AVFilterPad avfilter_vf_vflip_inputs[] = {
     {
         .name             = "default",
         .type             = AVMEDIA_TYPE_VIDEO,
         .get_video_buffer = get_video_buffer,
-        .start_frame      = start_frame,
-        .draw_slice       = draw_slice,
+        .filter_frame     = filter_frame,
         .config_props     = config_input,
     },
     { NULL }