Re: Speeding up MusicPlayerStart()?
Re: Speeding up MusicPlayerStart()?
- Subject: Re: Speeding up MusicPlayerStart()?
- From: William Stewart <email@hidden>
- Date: Mon, 10 Oct 2005 12:42:53 -0700
Right
The delay you are seeing is how long it is taking to start the actual
hardware.
What I'd suggest is the following:
Preroll
- AUGraphStart
- MusicPlayerPreroll
"Start"
- MusicPlayerStart
"Stop"
- MusicPlayerStop
- AUGraphStop
If you do it this way, then when someone is using your media handler
will NOT have their computer consuming cycles when they aren't
actually playing the movie
Bill
On 10/10/2005, at 8:53 AM, Edwin Vane wrote:
After finding example code for MusicPlayer in the AUViewTest I noticed
that by creating the graph with a DLSSynth in it yourself and using
AUGraphStart(), when you call MusicPlayerStart() later the delay is
less than
1ms.
On Sun, Oct 09, 2005 at 12:46:51PM -0400, Edwin Vane wrote:
Hi,
I've been looking at the MusicPlayer API. I find that calling
MusicPlayerStart() can take about 1s to complete (measured using a
pair
of calls to the host time retrieval functions). I was hoping to use
MusicPlayer inside QuickTime (specifically inside a derived media
handler to play midi data). However, using Start and Stop for play
and
stop in quicktime doesn't seem like a good idea if it incurs a second
delay (which may cause tracks to become unsynchronized). Is there
a way
to speed up MusicPlayerStart() or some other method to implement
start
and stop of music without incurring the delay? Or should I look into
some sort of workaround (setting a NULL sequence perhaps, although I
haven't tried that).
--
Edwin Vane
MMath Candidate
Computer Graphics Lab
School of Computer Science
University of Waterloo
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Edwin Vane
MMath Candidate
Computer Graphics Lab
School of Computer Science
University of Waterloo
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