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Subject: Re: FS#11232: software mixer

Re: FS#11232: software mixer

From: Jeff Goode <jeffg7_at_gmail.com>
Date: Sun, 02 May 2010 14:03:05 -0400

On 5/2/2010 04:44, Jens Arnold wrote:
> On 01.05.2010, Jeff Goode wrote:
>
>
>> I'd like to know if there's some way to force SDL to behave
>> like a target, with a very small FIFO buffer rather than
>> its own large playback buffer, or at least not always
>> insist on its being full. Ideas?
>>
> Perhaps just make the mix buffer larger for the sim?
>
> I have no real idea how to get around this while keeping SDL
> (and hence portability).
I think you're right about this and I'm going to give that a try next.
The sim audio driver still won't "DMA" like a target but at least it
ought to fill the buffer as SDL expects. Latency will skyrocket
though. Instead of 23 ms tops it'll be more like 250 ms. I guess this
isn't a problem as long as we're just using the sim to test code, but it
might if we're going to use it as a basis for Rockbox-as-app. In that
instance, the Rockbox mixer code would have to be thrown out in favor of
SDL mixer or some other library function.

Jeff
Received on 2010-05-02


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