Re: [Discuss-gnuradio] No audio on os x reading .dat files

[Josh Jennings]

Hi everyone,
The little endian/big endian theory is definitely the problem, since I
converted the dat file on my linux to big endian and it then played as
expected on my ibook. It is a rather simple c swap float code that
compiles good on my linux. Unfortunately, when I tried to compile my
linux c code on my ibook I get an error or with minor adjustments, I
get a bus error after starting the conversion. I will have to look
into that.

As far as I know, one would need to make an endian sniffer which would
either read a header in the file or decide on its own how to
read/convert the file.
I will look into this as time permits. Seems to be a good introduction
to gnuradio. This hasn't dampened my interest in gnuradio; on the
contrary, it has only excited it. Thanks for the timely feedback and
ideas.
Josh

On 8/17/06, Eric Blossom <address@hidden> wrote:
> On Thu, Aug 17, 2006 at 03:36:41PM -0400, Michael Dickens wrote:
> > Jan - Thanks for adding weight to the "endianness" theory.  Back
> > again to the previous question: Does the .dat file format somehow
> > internally specify the data endianness?  If so, then it would seem
> > simple to write a block to handle this.  If not, not so simple. - MLD
> >
> > On Aug 17, 2006, at 12:42 PM, Jan Schiefer wrote:
> > >I just tried this with rev 3340 on an Intel Mac, and I hear the guy
> > >talking. This would confirm the endianness theory.
>
> There are no headers on the files read or written by
> gr.file_{sink,source}.  You are free of course to create another set
> of sinks and sources that perhaps encode the data type and
> representation in a header.
>
> Eric