Re: Re: alsa driver, repeat playback of buffer contents

["random.bits" <random.bits@rogers.com>]

I started to follow up on Jaroslav's  advice. 

I am opening the "hw" pcm device using snd_pcm_open in 
order to address the base hardware.

I use "snd_pcm_hw_params_get_buffer" to determine the 
buffer size (which I presume is the hardware ring 
buffer). If I map to this buffer and then fill it with 
the sound exactly, then commit it, it just plays once. 
I put my process into wait state by using sleep(1) 
calls. 
How can I get the hardware to continue to play using 
the data in the ring buffer?

Thanks,
Mark

On Tuesday 15 March 2005 02:49, Jaroslav Kysela wrote:
> On Mon, 14 Mar 2005, Mark Cannon wrote:
> > How can I send down a short PCM stream, and have
> > the hardware repeat it until told to stop?
>
> You must always copy the data to right place in the
> ring buffer unless the sound fragment has not exact
> (or multiple) size of ring buffer.
>
> 						Jaroslav
>
> -----
> Jaroslav Kysela <perex@suse.cz>
> Linux Kernel Sound Maintainer
> ALSA Project, SUSE Labs



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