Re: multichannel mixing on iphone with multiple mixers
Re: multichannel mixing on iphone with multiple mixers
- Subject: Re: multichannel mixing on iphone with multiple mixers
- From: tahome izwah <email@hidden>
- Date: Thu, 29 Oct 2009 08:36:10 +0100
Seth,
SRC_xxxx means that there is a [S]ample [R]ate [C]onversion involved
here which would explain your numbers. I'd try with a file at the
system sample rate to see if you still get this much CPU usage - I
would be willing to bet that you don't.
--th
2009/10/29 Seth Delackner <email@hidden>:
>
> Out of curiosity I ran shark against the app running on hardware, and
> I see it spending fully 7% of its time in
> "SRC_convert_table_i16_scalar_stereo", which is the tail end of the
> call tree: AudioConverter::FillBuffer ->
> AudioConverterChain::RenderOutput ->
> BufferedAudioConverter::FillBuffer -> SRCWrapper::RenderOutput
>
> That's a sizeable amount of time for what is supposedly a "canonical"
> output format. Does this mean that the 8.24 format is the only
> *truly* canonical (no conversion overhead) format?
>
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