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static int channelmap_query_formats(AVFilterContext *ctx)
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ChannelMapContext *s = ctx->priv;
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ff_set_common_formats(ctx, ff_planar_sample_fmts());
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ff_set_common_samplerates(ctx, ff_all_samplerates());
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ff_channel_layouts_ref(s->channel_layouts, &ctx->outputs[0]->in_channel_layouts);