lavfi/af_crossfeed: convert to query_func2()

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

libavfilter/af_crossfeed.c

@@ -48,17 +48,27 @@ typedef struct CrossfeedContext {
     double *side[3];
 } CrossfeedContext;
 
-static int query_formats(AVFilterContext *ctx)
+static int query_formats(const AVFilterContext *ctx,
+                         AVFilterFormatsConfig **cfg_in,
+                         AVFilterFormatsConfig **cfg_out)
 {
-    AVFilterFormats *formats = NULL;
+    static const enum AVSampleFormat formats[] = {
-    AVFilterChannelLayouts *layout = NULL;
+        AV_SAMPLE_FMT_DBL,
+        AV_SAMPLE_FMT_NONE,
+    };
+    static const AVChannelLayout layouts[] = {
+        AV_CHANNEL_LAYOUT_STEREO,
+        { .nb_channels = 0 },
+    };
+
     int ret;
 
-    if ((ret = ff_add_format                 (&formats, AV_SAMPLE_FMT_DBL  )) < 0 ||
+    ret = ff_set_common_formats_from_list2(ctx, cfg_in, cfg_out, formats);
-        (ret = ff_set_common_formats         (ctx     , formats            )) < 0 ||
+    if (ret < 0)
-        (ret = ff_add_channel_layout         (&layout , &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO)) < 0 ||
+        return ret;
-        (ret = ff_set_common_channel_layouts (ctx     , layout             )) < 0 ||
+
-        (ret = ff_set_common_all_samplerates (ctx                          )) < 0)
+    ret = ff_set_common_channel_layouts_from_list2(ctx, cfg_in, cfg_out, layouts);
+    if (ret < 0)
         return ret;
 
     return 0;
@@ -372,7 +382,7 @@ const AVFilter ff_af_crossfeed = {
     .uninit         = uninit,
     FILTER_INPUTS(inputs),
     FILTER_OUTPUTS(ff_audio_default_filterpad),
-    FILTER_QUERY_FUNC(query_formats),
+    FILTER_QUERY_FUNC2(query_formats),
     .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
     .process_command = process_command,
 };