At Wed, 22 Aug 2007 10:02:11 -0500, Timur Tabi wrote: > > Takashi Iwai wrote: > > > Alternatively, you can remember the last allocated buffer-size and > > re-use the same buffer if the requested size is less than it. > > Since the buffer size change won't happen _so often_ (even via OSS > > emulation), this would work well in practice, too. > > Hmm... Neither of these options is really that great. ... but no other way :) The buffer size is dynamically configurable, per design. That's all. > I think I like the idea > of pre-allocating the buffer in .new. What is a reasonable maximum size for > the DMA buffer? 32KB seems small to me. AFAIK, 64kB seems sufficient in most cases. > When I was testing OSS emulation, > the first call to .hw_params passed a DMA buffer size of over 1MB! The driver should deny a too large size if it's unrealistic. But 1MB is realistic for many systems. So, the number depends on the system. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
