Re: 3D Mixer on iPhone
Re: 3D Mixer on iPhone
- Subject: Re: 3D Mixer on iPhone
- From: Paul Slocum <email@hidden>
- Date: Fri, 1 Oct 2010 01:02:32 -0400
Thanks for the additional info.
While we're talking about it, I want at the 3D mixer to use the linear
resampler, assuming that their resampler is well-optimized. But it
would really be more efficient if I just had that resampling CODE.
Does anyone have Apple's resampler code? or some cheap Arm-optimized
resampling code?
-paul
On Thu, Sep 30, 2010 at 7:56 PM, Bob Lang <email@hidden> wrote:
>
> On 1 Oct 2010, at 00:25, Aran Mulholland wrote:
>>
>> - only mono inputs...I reckon thats where your dramas lie :)
>
> Interesting. Several years ago I definitely got 3D mixer working (on Mac OS X Tiger) with stereo inputs by following tech note 2112. Indeed, the 3D mixer mode kSpatializationAlgorithm_StereoPassThrough implies stereo input! The other spatialisation modes all seemed to like stereo just fine.
>
> There is a specific comment in TN2112: When setting the stream format of a mixer's bus, remember that the mixer expects to receive stereo data as de-interleaved.
>
> If I recall correctly this simply means setting up separate left and right data buffers for the call back (but I admit I'm a little hazy on the details after all this time)
>
> Of course, TN2112 is very long in the tooth and I don't really know whether it's been superseded - and of course my experience was with OS X, not iPhone.
>
> Cheers
>
> Bob
>
>
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