Re: Slow seeking in MP3 files using ExtAudioFile
Re: Slow seeking in MP3 files using ExtAudioFile
- Subject: Re: Slow seeking in MP3 files using ExtAudioFile
- From: Christopher Atlan <email@hidden>
- Date: Fri, 23 Jan 2009 01:10:24 +0100
Hi Hamish,
My problem is that AudioQueue still plays some buffers before it
starts
playing from the new position.
Are you sure it's playing some buffers, rather than just some packets
from the buffer you had previously been filling? That was what bit me
on my first attempt at this: I didn't clear the buffer I had been
writing to when the seek occurred, so the first thing I heard when the
queue started again was a little audio from the old position.
I checked my AudioQueueOutputCallback which clears all buffers after
AudioQueueReset is called.
I try it with this sequence:
AudioQueuePause();
AudioQueueReset();
AudioFileStreamSeek();
AudioQueueStart();
I just use AudioQueueStop (synchronously) and AudioQueueStart and,
other than a small delay while the pipeline is filled, that seems to
work fine. Do your buffers get recycled when you call
AudioQueueReset()?
I just tested it again, and now I think my problem is maybe just a
glitch form time to time some seconds after the seeking.
But by playing around I notified a longer delay by using AudioQueueStop.
From the AudioQueueStop documentation:
"This function resets an audio queue, stops the audio hardware
associated with the queue if it is not in use by other audio services,
and stops the audio queue."
Stopping the audio hardware seems overkill, so I think AudioQueuePause
and AudioQueueReset are the way to go. Can you give it a try and
verify this?
Christopher
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden