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Re: [Discuss-gnuradio] Cannot get Socket-to-blob and blob-to-Socket to w
From: |
Josh Blum |
Subject: |
Re: [Discuss-gnuradio] Cannot get Socket-to-blob and blob-to-Socket to work with float values |
Date: |
Tue, 10 Jul 2012 10:12:00 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1 |
On 07/10/2012 09:34 AM, Tommy Tracy wrote:
> Hello everyone,
>
> I'm doing some work with Josh Blum's extras. Basically, I made the
> easiest possible message-passing program I could think of.
>
Floats have a size of 4 bytes.
You should set the item size parameter to 4.
-josh
> Signal Source [sample:44.1k, freq:1k] ----(float)----> Extras: Blob
> to Socket[UDP, 127.0.0.1, 12345]
>
> Extras: Socket to Blob[UDP, 127.0.0.1, 12345] -----(float)------>Audio
> Sink[sample:44.1k]
>
> When I attempt to run this, I get the following error message:
>
> File "/home/ttracy/Documents/GNURADIO/examples/companion/top_block.py",
> line 41, in __init__
> self.connect((self.gr_sig_source_x_0, 0), (self.extras_blob_to_socket_0,
> 0))
> File "/usr/local/lib/python2.7/dist-packages/gnuradio/gr/top_block.py",
> line 124, in connect
> self._connect(points[i-1], points[i])
> File "/usr/local/lib/python2.7/dist-packages/gnuradio/gr/top_block.py",
> line 130, in _connect
> dst_block.to_basic_block(), dst_port)
> File
> "/usr/local/lib/python2.7/dist-packages/gnuradio/gr/gnuradio_core_runtime.py",
> line 1836, in primitive_connect
> Traceback (most recent call last):
> File "/home/ttracy/Documents/GNURADIO/examples/companion/top_block.py",
> line 54, in <module>
> return _gnuradio_core_runtime.gr_top_block_sptr_primitive_connect(self,
> *args)
> ValueError: itemsize mismatch: sig_source_f(1):0 using 4, blob_to_udp
> wrapper(6):0 using 1
>
> Unfortunately, I have no idea what this stack trace is telling me. Can
> it not handle Floats as an input?
>
> Thanks for the help!
>