Re: Progressive audio data decoding

On Tue, Jan 15, 2013 at 10:45 AM, Yury Delendik <ydelendik@mozilla.com>wrote:

> On 1/15/2013 12:27 PM, Ralph Giles wrote:
>
>> On 13-01-15 5:55 AM, Yury Delendik wrote:
>>
>>> Hello,
>>>
>>> Is there a way to decode the audio data in chunks?
>>>
>> I don't know about WebAudio, but are you aware of the MediaSource draft?
>> It proposes something like this.
>>
>> https://dvcs.w3.org/hg/html-**media/raw-file/tip/media-**
>> source/media-source.html<https://dvcs.w3.org/hg/html-media/raw-file/tip/media-source/media-source.html>
>>
>>   -r
>>
>>  Thank you. That's closer to what I'm looking for.
>
> But to be on a par with flash or implement some fancy audio player, some
> basic sound transform may be applied to the audio (e.g. [1]). Also, it will
> be useful to extract the sound data from the encoded audio [2] or compute
> spectrum [3].
>
>   [1] http://help.adobe.com/en_US/**FlashPlatform/reference/**
> actionscript/3/flash/media/**SoundTransform.html<http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/media/SoundTransform.html>
>   [2] http://help.adobe.com/en_US/**FlashPlatform/reference/**
> actionscript/3/flash/media/**Sound.html#extract%28%29<http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/media/Sound.html#extract%28%29>
>   [3] http://help.adobe.com/en_US/**FlashPlatform/reference/**
> actionscript/3/flash/media/**SoundMixer.html#**computeSpectrum%28%29<http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/media/SoundMixer.html#computeSpectrum%28%29>


There is the MediaElementAudioSourceNode to let you apply effects or
visualize from an <audio> element:
https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#MediaElementAudioSourceNode