From 21b1f08ea2ec785f47d7d90955b2eaa28ea345ee Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Mon, 29 Apr 2019 12:52:50 +0200
Subject: [PATCH] avfilter/avf_avectorscope: switch to activate

---
 libavfilter/avf_avectorscope.c | 32 ++++++++++++++++++++++++++------
 1 file changed, 26 insertions(+), 6 deletions(-)

diff --git a/libavfilter/avf_avectorscope.c b/libavfilter/avf_avectorscope.c
index af9f1da1ec..d9ec151331 100644
--- a/libavfilter/avf_avectorscope.c
+++ b/libavfilter/avf_avectorscope.c
@@ -28,6 +28,7 @@
 #include "libavutil/opt.h"
 #include "libavutil/parseutils.h"
 #include "avfilter.h"
+#include "filters.h"
 #include "formats.h"
 #include "audio.h"
 #include "video.h"
@@ -69,6 +70,7 @@ typedef struct AudioVectorScopeContext {
     int mirror;
     unsigned prev_x, prev_y;
     AVRational frame_rate;
+    int nb_samples;
 } AudioVectorScopeContext;
 
 #define OFFSET(x) offsetof(AudioVectorScopeContext, x)
@@ -208,12 +210,8 @@ static int config_input(AVFilterLink *inlink)
 {
     AVFilterContext *ctx = inlink->dst;
     AudioVectorScopeContext *s = ctx->priv;
-    int nb_samples;
 
-    nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5);
-    inlink->partial_buf_size =
-    inlink->min_samples =
-    inlink->max_samples = nb_samples;
+    s->nb_samples = FFMAX(1, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5);
 
     return 0;
 }
@@ -365,6 +363,28 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
     return ff_filter_frame(outlink, av_frame_clone(s->outpicref));
 }
 
+static int activate(AVFilterContext *ctx)
+{
+    AVFilterLink *inlink = ctx->inputs[0];
+    AVFilterLink *outlink = ctx->outputs[0];
+    AudioVectorScopeContext *s = ctx->priv;
+    AVFrame *in;
+    int ret;
+
+    FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
+
+    ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
+    if (ret < 0)
+        return ret;
+    if (ret > 0)
+        return filter_frame(inlink, in);
+
+    FF_FILTER_FORWARD_STATUS(inlink, outlink);
+    FF_FILTER_FORWARD_WANTED(outlink, inlink);
+
+    return FFERROR_NOT_READY;
+}
+
 static av_cold void uninit(AVFilterContext *ctx)
 {
     AudioVectorScopeContext *s = ctx->priv;
@@ -377,7 +397,6 @@ static const AVFilterPad audiovectorscope_inputs[] = {
         .name         = "default",
         .type         = AVMEDIA_TYPE_AUDIO,
         .config_props = config_input,
-        .filter_frame = filter_frame,
     },
     { NULL }
 };
@@ -397,6 +416,7 @@ AVFilter ff_avf_avectorscope = {
     .uninit        = uninit,
     .query_formats = query_formats,
     .priv_size     = sizeof(AudioVectorScopeContext),
+    .activate      = activate,
     .inputs        = audiovectorscope_inputs,
     .outputs       = audiovectorscope_outputs,
     .priv_class    = &avectorscope_class,