Re: Question regarding period/buffer and error handling

[Cournapeau David <cournape@atr.jp>]

Clemens Ladisch wrote:

>Cournapeau David wrote:
>  
>
>>    My second problem is related to snd_card_next: If the card value
>>returned by snd_card_next is different from -1, does that always mean
>>than a alsa audio device is present on the system ?
>>    
>>
>
>It means that same kind of device with an ALSA driver is present.
>This does not mean that you'll be able to play PCM data to it.  And
>there may be software devices available.
>
>  
>
>>Is it the best method to probe a soundcard with alsa support?
>>    
>>
>
>snd_card_next() and snd_ctl_pcm_next_device() will give you a list of
>hardware devices only.
>
>Usually, you should use the device named "default" and let the user
>allow to specify another device name.
>
>  
>
Ok, that's what I thought reading the different sources I checked, 
concerning the device name. But I am still a bit confused how to probe a 
soundcard to play a pcm stream to it: what  should I do after having 
found an hardware device with snd_card_next ?

Is there always a "default" name ? Or is it user dependant ?

cheers,

David


-------------------------------------------------------
This SF.Net email is sponsored by: Oracle 10g
Get certified on the hottest thing ever to hit the market... Oracle 10g. 
Take an Oracle 10g class now, and we'll give you the exam FREE.
http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click