[alsa-devel] SALSA and aplay

Alan Horstmann gineera at aspect135.co.uk
Fri Jul 20 17:20:49 CEST 2007

On Friday 20 July 2007 13:10, you wrote:
> At Fri, 20 Jul 2007 12:57:07 +0100,
> Alan Horstmann wrote:

> > OK. Salsa is performing the same as asound using "hw", except one other
> > perhaps trivial thing I have noticed.  The aplay code does
> > 	err = snd_output_stdio_attach(&log, stderr, 0);
> > and prints things
> > 	snd_pcm_hw_params_dump(params, log);
> > finishing with
> > 	snd_output_close(log)
> > In alsa-lib, the third parameter of .._attach is used to set 'close', and
> > being 0, means stderr is not closed.  However, with salsa the file is
> > always closed at the end.  I am using the aplay code as a function, and
> > on the 2nd call, there are non of the print items.  Preventing this close
> > in salsa or the aplay code does remove the problem.  Is this intended
> > trimming of functionality for min size?
> Ah, that stupid wrapper for FILE I/O.  I don't understand why such a
> thing was introduced...
> Not sure whether I'll fix it or leave it yet.

Actually, if my reading of the code is right (which it may not be), in 
alsa-lib all that snd_output_close(..) does is close(file) if 'close'=1.

So if the aplay code does .._attach with 'close'=0, is there any reason to 
call snd_output_close(..)?  Or just omit that?  So probably no fix needed?


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