Re: [Patch-gnuradio] wav sources/sink

[Eric Blossom]

On Wed, Dec 12, 2007 at 02:19:21PM +0100, Martin Braun wrote:
> Hi,
> 
> Here's a WAV file sink and source I wrote because I frequently work with WAV 
> recordings of baseband or IF signals, plus I like using WAV manipulation 
> software to analyze signals or do some quick-and-dirty processing. It's also 
> useful as an audio source for testing audio transmission without having to 
> use a microphone.
> 
> Of course I could use gr_file_sink and gr_file_source, but my blocks save me 
> a 
> conversion step and I use them a lot.
> 
> If anyone feels like this is something worth having in GNU Radio, I'd be glad 
> to submit my code [attached]. I can also provide a qa-script, but it requires 
> a small test-file to work.
> 
> Martin

Hi Martin,

We're definitely interested.  

In looking at the code, it seems to be unaware of possible endianness
differences.  I'm mostly clueless about the actual .wav format, but I
assume there's a case where the file format and the host differ on the
byte ordering.  Are wave files always little-endian, or do they code
the endian-ness in the header somewhere?  As is, I don't think the
code will run on big-endian machines such as the PowerPC.

Please let me know if I've misunderstood something.

And yes, a qa-script and a small test file would be great!

To includes this in our code base we'll need a copyright assignment
for your changes to the Free Software Foundation.  I'll send the email
form that gets that started in the next message.  Let me know if
you've got any qustions about any of it.

Thanks,
Eric