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

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

libavfilter/af_agate.c

@@ -188,24 +188,6 @@ static void gate(AudioGateContext *s,
 
 #if CONFIG_AGATE_FILTER
 
-static int query_formats(AVFilterContext *ctx)
-{
-    AVFilterFormats *formats = NULL;
-    int ret;
-
-    if ((ret = ff_add_format(&formats, AV_SAMPLE_FMT_DBL)) < 0)
-        return ret;
-    ret = ff_set_common_formats(ctx, formats);
-    if (ret < 0)
-        return ret;
-
-    ret = ff_set_common_all_channel_counts(ctx);
-    if (ret < 0)
-        return ret;
-
-    return ff_set_common_all_samplerates(ctx);
-}
-
 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 {
     const double *src = (const double *)in->data[0];
@@ -258,7 +240,7 @@ const AVFilter ff_af_agate = {
     .priv_size      = sizeof(AudioGateContext),
     FILTER_INPUTS(inputs),
     FILTER_OUTPUTS(outputs),
-    FILTER_QUERY_FUNC(query_formats),
+    FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_DBL),
     .process_command = ff_filter_process_command,
     .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
 };