func: ff_rdt_parse_open(AVFormatContext *ic, int first_stream_of_set_idx,
  
                    void *priv_data, RTPDynamicProtocolHandler *handler)
  
  {
  
      RDTDemuxContext *s = av_mallocz(sizeof(RDTDemuxContext));
  
      if (!s)
  
          return NULL;
  
  
  
      s->ic = ic;
  
      s->streams = &ic->streams[first_stream_of_set_idx];
  
      do {
  
          s->n_streams++;
  
      } while (first_stream_of_set_idx + s->n_streams < ic->nb_streams &&
  
               s->streams[s->n_streams]->priv_data == s->streams[0]->priv_data);
  
      s->prev_set_id    = -1;
  
      s->prev_stream_id = -1;
  
      s->prev_timestamp = -1;
  
      s->parse_packet = handler->parse_packet;
  
      s->dynamic_protocol_context = priv_data;
  
  
  
      return s;
  
  }
  