Re: Couple of questions

[Carlos Munoz <carlos@kenati.com>]

Adrian McMenamin wrote:

>On Thu, 2006-03-16 at 11:42 +0100, Takashi Iwai wrote:
>  
>
>>At Thu, 16 Mar 2006 00:01:11 +0000,
>>Adrian McMenamin wrote:
>>    
>>
>>>If my driver declares this:
>>>
>>>	.info = (SNDRV_PCM_INFO_NONINTERLEAVED),
>>>
>>>Can I expect samples to come in all left followed by all right, or how?
>>>      
>>>
>>Yes.  It's the non-interleaved format (LLLLLLLL....RRRRRR.....).
>>
>>    
>>
>>>And will cat somefile.wav > /dev/dsp using oss emulation respect that?
>>>      
>>>
>>Yes.
>>    
>>
>
>
>Are you sure about this bit? Either my code is extremely broken or cat
>isn't doing anything other than pump the bytes in as a simple stream
>  
>
Hi Adrian,

If I cat a wav file to /dev/dsp I just hear noise. However, if  the 
driver opens/reads the same wav file (bypassing the alsa layer) and 
feeds it to the hardware I get perfect sound. Your may want to try that 
to validate your driver and hardware. You might need to parse the file 
into RL buffers as you read it.


Carlos




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