avfilter/af_flanger: Store format in filter, remove query function

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavfilter/af_flanger.c

@@ -88,22 +88,6 @@ static av_cold int init(AVFilterContext *ctx)
     return 0;
 }
 
-static int query_formats(AVFilterContext *ctx)
-{
-    static const enum AVSampleFormat sample_fmts[] = {
-        AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE
-    };
-    int ret = ff_set_common_all_channel_counts(ctx);
-    if (ret < 0)
-        return ret;
-
-    ret = ff_set_common_formats_from_list(ctx, sample_fmts);
-    if (ret < 0)
-        return ret;
-
-    return ff_set_common_all_samplerates(ctx);
-}
-
 static int config_input(AVFilterLink *inlink)
 {
     AVFilterContext *ctx = inlink->dst;
@@ -227,5 +211,5 @@ const AVFilter ff_af_flanger = {
     .uninit        = uninit,
     FILTER_INPUTS(flanger_inputs),
     FILTER_OUTPUTS(flanger_outputs),
-    FILTER_QUERY_FUNC(query_formats),
+    FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_DBLP),
 };