lavfi/avf_abitscope: switch to query_func2()

Also, drop redundant calls that also happen implicitly in generic code.

libavfilter/avf_abitscope.c

@@ -65,12 +65,11 @@ static const AVOption abitscope_options[] = {
 
 AVFILTER_DEFINE_CLASS(abitscope);
 
-static int query_formats(AVFilterContext *ctx)
+static int query_formats(const AVFilterContext *ctx,
+                         AVFilterFormatsConfig **cfg_in,
+                         AVFilterFormatsConfig **cfg_out)
 {
     AVFilterFormats *formats = NULL;
-    AVFilterChannelLayouts *layouts;
-    AVFilterLink *inlink = ctx->inputs[0];
-    AVFilterLink *outlink = ctx->outputs[0];
     static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16P, AV_SAMPLE_FMT_S32P,
                                                        AV_SAMPLE_FMT_U8P,  AV_SAMPLE_FMT_S64P,
                                                        AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP,
@@ -79,21 +78,11 @@ static int query_formats(AVFilterContext *ctx)
     int ret;
 
     formats = ff_make_format_list(sample_fmts);
-    if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0)
-        return ret;
-
-    layouts = ff_all_channel_counts();
-    if (!layouts)
-        return AVERROR(ENOMEM);
-    if ((ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts)) < 0)
-        return ret;
-
-    formats = ff_all_samplerates();
-    if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
+    if ((ret = ff_formats_ref(formats, &cfg_in[0]->formats)) < 0)
         return ret;
 
     formats = ff_make_format_list(pix_fmts);
-    if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
+    if ((ret = ff_formats_ref(formats, &cfg_out[0]->formats)) < 0)
         return ret;
 
     return 0;
@@ -322,7 +311,7 @@ const AVFilter ff_avf_abitscope = {
     .priv_size     = sizeof(AudioBitScopeContext),
     FILTER_INPUTS(inputs),
     FILTER_OUTPUTS(outputs),
-    FILTER_QUERY_FUNC(query_formats),
+    FILTER_QUERY_FUNC2(query_formats),
     .uninit        = uninit,
     .activate      = activate,
     .priv_class    = &abitscope_class,