Re: How to handle a packet lost with AudioQueue ?
Re: How to handle a packet lost with AudioQueue ?
- Subject: Re: How to handle a packet lost with AudioQueue ?
- From: Christian Blomert <email@hidden>
- Date: Mon, 13 Aug 2012 14:50:23 +0200
Hey Yoann,On Aug 13, 2012, at 8:39 AM, Yoann Gini wrote:
Like that it work, but the loss handling is done to late, so at each packet lost I add a delay in the AQ and after some time I’m totally unsynchronized with the rest of my environment…
What I need is a way to make AQ works with some packet missing… Maybe I can go a step deeper in CoreAudio, by using AU and RemoteIO… But my previous try with that wasn’t really successful… If someone have a example of RemoteIO used to play PCM frame, I’m interested.
Best regards,
Yoann
I am not really familiar with AudioQueue - could you post the code which recreates the lost packet and inserts it into the queue? I do remember there was a 0.5second delay when starting the queue - could that be where it gets out of sync?
Either way: Once you went to AUs and RemoteIO you won't go back. Here's my current implementation to play samples of PCM (in my case 2 channel signed 16 bit Ints) the sampleCallback is asked to render 128 - in best case - samples per run - which you could feed from the incoming stream, adding zeros to the buffer for lost packets. The interruption handlers aren't perfect yet, so getting calls on an iphone will stop the engine ;) but other than that it should be good to go!
if you have any questions let me know!
Best regards, Chris |
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