[Webkit-unassigned] [Bug 75119] AudioBufferSourceNode and MediaElementAudioSourceNode should support multi-channel > stereo

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=75119





--- Comment #4 from Wei James <james.wei at intel.com>  2012-01-03 17:18:06 PST ---
(In reply to comment #3)
> Hi James, thanks for offering to do this.  I think it's something you could probably tackle.  But we'll have to first sort out the details of your other vsmul() optimizations in that same part of the code.  If you see my latest comment there, I think we should maybe simplify the denormal handling:
> 
> https://bugs.webkit.org/show_bug.cgi?id=75334
> 
> As far as the 5.1 to stereo case, the only question is the exact scaling factors (constant multipliers), so you can prepare a patch with close to the exact code (except the numeric values) and we can sort that out later.

roger, thanks for the guidance. I will work on #75334 firstly. 

for up and down mixing, for source and destination, we both have 5 options: mono, stereo, quad, 5.0, 5.1.  Current we only have 3 options: mono->mono, mono->stereo, stereo->stereo. 

do we need to support all channel up and down mixing(that is all 25 options)?

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