Re: OOT Module with shape error

The "additional checks" would be to find the min of input and output lengths, and to copy only that number of items. Something like:

nitems = min(len(input_items[0]), len(output_items[0]))

out[:nitems] = in[:nitems]

As your block gets more complex, the checks/limits may get more complex.

On Wed, May 26, 2021 at 7:56 PM Elmore Family <wa4ywm@comcast.net> wrote:

Jeff,

 

This didn't work – same error.

 

Jim

 

From: Jeff Long

Sent: Tuesday, May 25, 2021 5:22 PM

To: GNURadio Discussion List

Subject: Re: OOT Module with shape error

 

The framework can give you different size input and output buffers. In this case, you would:

 

nitems = len(input_items[0])

out[:nitems] = input_items[0]

 

You may have to do more checks, of course, because input could be larger than output.

 

On Tue, May 25, 2021 at 5:03 PM Elmore's <wa4ywm@comcast.net> wrote:

I am attempting to add an OOT module to my flowgraph. I have generated a General block which I want to place between an Audio Source and a Multiply Constant.

 

The Audio Source is set at a 48K sample rate. Input and Output are float.

 

As a test (I have never tried using an OOT module before) I said:

    out[:] = input_items[0]

in an attempt to simply feed the input to the output unmodified.

 

I get a run time error:

    ValueError: Could not broadcast input array from shape(4800) into shape(256)

 

Obviously I don't know how to perform the simplest possible operation. What is wrong here?

 

I have tried looking on forums and reading some of the GNU docs but no joy.

 

Thanks for any help.

 

Jim

 

 

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