code: function encodeEmbeddedBlobBuffer( encoder, buffer_type, buffer, mime_type ) {
  	// Get MIME And payload
  	var mime_id = encoder.stringID( mime_type );
  
  	// Write buffer header
  	encoder.log(LOG.EMB,"file=[blob]', mime="+mime+", len="+buffer.length);
  	encodeBuffer( encoder, buffer_type, mime_id, buffer );
  
  }
docs: Enbod a blob as an embedded buffer