diff options
| author | Tom Rondeau <tom@trondeau.com> | 2015-04-05 16:20:18 -0400 |
|---|---|---|
| committer | Tom Rondeau <tom@trondeau.com> | 2015-04-05 16:20:18 -0400 |
| commit | 81929b6cc8258ca022fabe6013ddc043452cd21c (patch) | |
| tree | 80131912327c3327b8c6f882bd17d82c64812e03 /gr-blocks/grc | |
| parent | fa2abde0a0c9c1430ca1c4bb470ddb35e18c0ee2 (diff) | |
blocks: adding a variable tag_object to help build tags.
Edit boxes to set the tag's offset, key, value, and source id to make
it easier to create and use tags in a flwograph. the gr-blocks example
vector_source_with_tags.grc has been updated to use this.
Diffstat (limited to 'gr-blocks/grc')
| -rw-r--r-- | gr-blocks/grc/blocks_block_tree.xml | 4 | ||||
| -rw-r--r-- | gr-blocks/grc/blocks_tag_object.xml | 55 |
2 files changed, 59 insertions, 0 deletions
diff --git a/gr-blocks/grc/blocks_block_tree.xml b/gr-blocks/grc/blocks_block_tree.xml index 383ec876e4..cc7b4b8c6f 100644 --- a/gr-blocks/grc/blocks_block_tree.xml +++ b/gr-blocks/grc/blocks_block_tree.xml @@ -221,4 +221,8 @@ <block>blocks_vco_f</block> <block>blocks_vco_c</block> </cat> + <cat> + <name>Variables</name> + <block>variable_tag_object</block> + </cat> </cat> diff --git a/gr-blocks/grc/blocks_tag_object.xml b/gr-blocks/grc/blocks_tag_object.xml new file mode 100644 index 0000000000..f5813d3fbc --- /dev/null +++ b/gr-blocks/grc/blocks_tag_object.xml @@ -0,0 +1,55 @@ +<?xml version="1.0"?> +<!-- +################################################### +## Tag Object: creates a tag +################################################### + --> +<block> + <name>Tag Object</name> + <key>variable_tag_object</key> + <var_make>self.$(id) = $(id) = gr.tag_utils.python_to_tag(($offset, $key, $value, $src))</var_make> + <make></make> + + <param> + <name>Offset</name> + <key>offset</key> + <value>0</value> + <type>int</type> + </param> + + <param> + <name>Key</name> + <key>key</key> + <value>pmt.intern("key")</value> + <type>raw</type> + </param> + + <param> + <name>Value</name> + <key>value</key> + <value>pmt.intern("value")</value> + <type>raw</type> + </param> + + <param> + <name>Source ID</name> + <key>src</key> + <value>pmt.intern("src")</value> + <type>raw</type> + </param> + + <doc> + This block creates a tag object. While tags are based on an + absolute offset, this is based on a relative offset that must be + appropriately translated by the block using it. For example, this + is used by the vector_source blocks, which will treat a 0 offset + in the tag as the first item in the stream when the vector starts + or repeats. + + The tag objects are created using the python_to_tag Python + function to make it easy to generate a tag_t in Python. The call + looks like: + + gr.tag_utils.python_to_tag(($offset, $key, $value, $src)) + </doc> +</block> |