grc/blocks/gr_null_source.xml


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<?xml version="1.0"?>
<!--
###################################################
##Null Source
###################################################
 -->
<block>
	<name>Null Source</name>
	<key>gr_null_source</key>
	<import>from gnuradio import gr</import>
	<make>gr.null_source($type.size*$vlen)</make>
	<param>
		<name>Output Type</name>
		<key>type</key>
		<type>enum</type>
		<option>
			<name>Complex</name>
			<key>complex</key>
			<opt>size:gr.sizeof_gr_complex</opt>
		</option>
		<option>
			<name>Float</name>
			<key>float</key>
			<opt>size:gr.sizeof_float</opt>
		</option>
		<option>
			<name>Int</name>
			<key>int</key>
			<opt>size:gr.sizeof_int</opt>
		</option>
		<option>
			<name>Short</name>
			<key>short</key>
			<opt>size:gr.sizeof_short</opt>
		</option>
		<option>
			<name>Byte</name>
			<key>byte</key>
			<opt>size:gr.sizeof_char</opt>
		</option>
	</param>
	<param>
		<name>Vec Length</name>
		<key>vlen</key>
		<value>1</value>
		<type>int</type>
	</param>
	<check>$vlen &gt; 0</check>
	<source>
		<name>out</name>
		<type>$type</type>
		<vlen>$vlen</vlen>
	</source>
</block>