void avfilter_unref_buffer(AVFilterBufferRef *ref)
{
    if (!ref)
        return;
    if (!(--ref->buf->refcount))
        ref->buf->free(ref->buf);
    av_free(ref->video);
    av_free(ref->audio);
    av_free(ref);
}
['void avfilter_default_end_frame(AVFilterLink *inlink)\n{\n    AVFilterLink *outlink = NULL;\n    if (inlink->dst->output_count)\n        outlink = inlink->dst->outputs[0];\n    avfilter_unref_buffer(inlink->cur_buf);\n    inlink->cur_buf = NULL;\n    if (outlink) {\n        if (outlink->out_buf) {\n            avfilter_unref_buffer(outlink->out_buf);\n            outlink->out_buf = NULL;\n        }\n        avfilter_end_frame(outlink);\n    }\n}', 'void avfilter_unref_buffer(AVFilterBufferRef *ref)\n{\n    if (!ref)\n        return;\n    if (!(--ref->buf->refcount))\n        ref->buf->free(ref->buf);\n    av_free(ref->video);\n    av_free(ref->audio);\n    av_free(ref);\n}']