Re: Web Audio API decoder instancing

On Thu, Dec 20, 2012 at 3:23 AM, Bradley, Adam <adam.bradley@jagex.com>wrote:

> Hi,****
>
> ** **
>
> I’m interested in finding out more information on the web audio API
> standard with regards to decoding encoded formats (Ogg/Mp3 etc.).****
>
> ** **
>
> What I am wondering is why the standard only allows for a ‘global’ decoder
> that accepts an intact audio stream, rather than being able to instance a
> decoder object and then pass the audio data to it as and when the
> javascript application decides in chunks.****
>
> ** **
>
> The reason I’m interested in this is that I am wanting to get large
> (>10min) audio files in Ogg format playing back reliably in HTML5 whilst
> using as little memory as possible. It seems, at least naively to me, that
> this would be handled better if we could decode the files in chunks using
> an instanced decoder and thus employ some manner of circular buffering
> technique to keep the memory requirements to a minimum.****
>
> ** **
>
> Is this something that may be possible to build into the standard, or
> perhaps there is another existing solution to this issue that I am
> overlooking?
>

What you might be interested in is using an <audio> element for streaming
and using the MediaElementAudioSourceNode:
https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#MediaElementAudioSourceNode


> ****
>
> ** **
>
> Cheers,****
>
> ** **
>
> *Adam Bradley*
>
> Audio Systems Developer****
>
> Jagex Games Studio****
>
> ** **
>
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