On Mon, 1 Mar 2004, Doug McLain wrote:
> According to the alsa documentation, the return value of
> snd_hw_params_set_rate_near is the 'approximate chosen rate', and the
> 3rd arg being type 'int'. The two tutorials at the documentation
> section of the alsa-project website both hold true to this with code like:
>
> exact_rate = snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, rate, &dir);
> if (dir != 0) {
> fprintf(stderr, "The rate %d Hz is not supported by your hardware.\n
> ==> Using %d Hz instead.\n", rate, exact_rate);
> }
>
>
>
> After unsuccesful attempts at using this function this way (I'm learning
> linux audio software devel starting with alsa drivers and user
> interface), I went into the aplay source and found the version that
> tests a before and after version of arg 3 (which is a pointer to int
> that gets changed to the result rate by the function) and tests the
> return only for err. I assume this function changed? Im at the learning
> stage so I'm probably stating the obvious, but when your new sometimes
> reassurance from someone that knows helps. Is the documentaion just
> behind, or did this slip by unnoticed? Curious...
Yes, the new functions returns value in function parameter not result.
Can you post me URL on the ALSA website, where this information is not
updated?
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
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