Re: Streaming Audio - AudioFileStream, CFReadStreamRead and AudioQueue
Re: Streaming Audio - AudioFileStream, CFReadStreamRead and AudioQueue
- Subject: Re: Streaming Audio - AudioFileStream, CFReadStreamRead and AudioQueue
- From: William Stewart <email@hidden>
- Date: Thu, 19 Nov 2009 17:53:37 -0800
On Nov 19, 2009, at 2:29 PM, Alexander Saal wrote:
> Hi Bill,
>
> thanks for the very fast answer.
>
> Ok. If I understand it correctly. Apple forgot this to implement that? Oh my gott. ;-)
I wouldn't say forgot. haven't yet :)
>
> Another question:
> I use AUGraph and AUNode to play files. That means, I create new AUGraph and AUNodes
> and connect them. This works fine so far.
>
> It is possible to play a Internet Radio Stream, like an MP3 stream, with AUGraph and AUNodes?
> How it is possible?
you'd have to get the internet stream decoded to linear pcm, then feed this into a graph through a callback attached to an AU (that is represented by a node).
You can manage this by using AudioQueueOfflineRender
construct it and feed it from your network
in the AU's callback, call AQOffline for the data you need for that render cycle..
There is a tech note written to explain how to use the AQ in this manner.
HTH
Bill
>
> If not:
>
> It is possible to play a Internet Radio Stream, like an MP3 stream, over the Core Audio API?
> How it is possible?
>
> Note:
> Sorry for my bad english.
>
>
> Best regards
> Alexander Saal
>
> Am 19.11.2009 um 22:55 schrieb William Stewart:
>
>> At this point you can't. Once you provide the audio data to an AQ object, it goes out pretty much as provided. We're considering addressing this at some point
>>
>> Bill
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