avfilter/settb: switch to activate

Now correctly updates EOF timestamp.

libavfilter/settb.c

@@ -34,6 +34,7 @@
 #include "libavutil/rational.h"
 #include "audio.h"
 #include "avfilter.h"
+#include "filters.h"
 #include "internal.h"
 #include "video.h"
 
@@ -104,22 +105,58 @@ static int config_output_props(AVFilterLink *outlink)
     return 0;
 }
 
-static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
+static int64_t rescale_pts(AVFilterLink *inlink, AVFilterLink *outlink, int64_t orig_pts)
 {
     AVFilterContext *ctx = inlink->dst;
-    AVFilterLink *outlink = ctx->outputs[0];
+    int64_t new_pts = orig_pts;
 
     if (av_cmp_q(inlink->time_base, outlink->time_base)) {
-        int64_t orig_pts = frame->pts;
-        frame->pts = av_rescale_q(frame->pts, inlink->time_base, outlink->time_base);
+        new_pts = av_rescale_q(orig_pts, inlink->time_base, outlink->time_base);
         av_log(ctx, AV_LOG_DEBUG, "tb:%d/%d pts:%"PRId64" -> tb:%d/%d pts:%"PRId64"\n",
                inlink ->time_base.num, inlink ->time_base.den, orig_pts,
-               outlink->time_base.num, outlink->time_base.den, frame->pts);
+               outlink->time_base.num, outlink->time_base.den, new_pts);
     }
 
+    return new_pts;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
+{
+    AVFilterContext *ctx = inlink->dst;
+    AVFilterLink *outlink = ctx->outputs[0];
+
+    frame->pts = rescale_pts(inlink, outlink, frame->pts);
+
     return ff_filter_frame(outlink, frame);
 }
 
+static int activate(AVFilterContext *ctx)
+{
+    AVFilterLink *inlink = ctx->inputs[0];
+    AVFilterLink *outlink = ctx->outputs[0];
+    AVFrame *in;
+    int status;
+    int64_t pts;
+    int ret;
+
+    FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
+
+    ret = ff_inlink_consume_frame(inlink, &in);
+    if (ret < 0)
+        return ret;
+    if (ret > 0)
+        return filter_frame(inlink, in);
+
+    if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
+        ff_outlink_set_status(outlink, status, rescale_pts(inlink, outlink, pts));
+        return 0;
+    }
+
+    FF_FILTER_FORWARD_WANTED(outlink, inlink);
+
+    return FFERROR_NOT_READY;
+}
+
 #if CONFIG_SETTB_FILTER
 
 DEFINE_OPTIONS(settb, VIDEO);
@@ -129,7 +166,6 @@ static const AVFilterPad avfilter_vf_settb_inputs[] = {
     {
         .name         = "default",
         .type         = AVMEDIA_TYPE_VIDEO,
-        .filter_frame = filter_frame,
     },
     { NULL }
 };
@@ -150,6 +186,7 @@ AVFilter ff_vf_settb = {
     .priv_class  = &settb_class,
     .inputs      = avfilter_vf_settb_inputs,
     .outputs     = avfilter_vf_settb_outputs,
+    .activate    = activate,
 };
 #endif /* CONFIG_SETTB_FILTER */
 
@@ -162,7 +199,6 @@ static const AVFilterPad avfilter_af_asettb_inputs[] = {
     {
         .name         = "default",
         .type         = AVMEDIA_TYPE_AUDIO,
-        .filter_frame = filter_frame,
     },
     { NULL }
 };
@@ -183,5 +219,6 @@ AVFilter ff_af_asettb = {
     .inputs      = avfilter_af_asettb_inputs,
     .outputs     = avfilter_af_asettb_outputs,
     .priv_class  = &asettb_class,
+    .activate    = activate,
 };
 #endif /* CONFIG_ASETTB_FILTER */