Re: CVS commit - 0.95.07

On 4 May 2007, at 18:47, Jan Depner wrote:

> On Fri, 2007-05-04 at 12:24 -0500, Jan Depner wrote:
>> OK, I've got the meters set up for RMS on output and I've got the
>> function calls set up in intrim.c to handle it.  If someone can  
>> figure
>> out how to compute RMS using Steve's routines -
>> http://www.ecs.soton.ac.uk/~swh/rms/ we can get this thing  
>> working.  I
>> am assuming that the calls would need to go in the following loop in
>> process.c :
>>
>>     for (pos = 0; pos < nframes; pos++) {
>> 	for (port = 0; port < nchannels; port++) {
>> 	    const float oa = fabs(out[port][pos]);
>>
>> 	    if (oa > lim_peak[LIM_PEAK_OUT]) {
>> 		lim_peak[LIM_PEAK_OUT] = oa;
>> 	    }
>> 	    if (oa > out_peak[port]) {
>> 		out_peak[port] = oa;
>> 	    }
>> 	}
>>     }
>>
>> but I'm probably wrong ;-)
>>
>
>     Just for fun I implemented the "naive" RMS in the above loop  
> and it
> looks purty (as we say down here in the South).  It's probably not  
> what
> we're looking for but it does prove that I've got the meters and
> callbacks set up properly ;-)

Great!

To hook up the code, you just need to initialise the RMS object with  
a call to rms_new(), then call rms_run_buffer() on each audio buffer,  
and the float that you get back is the RMS signal level.

- Steve

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