A quick note to say great to see you doing this.
I own a DFG1394 and have used it with QC, but the experience is not
without pain using the standard video input patch: from memory,
opening the composition without the DFG there (or then reopening when
it is) causes rendering of the comp to fail, and you have to delete,
save, reload and re-add the video input patch to resurrect things. It
would be great to see a native patch.
Toby
On 21 Oct 2009, at 01:44, Milton Aupperle wrote:
Hi Folks;
I'm a long time (20+ year) Mac developer who is trying to port our
working (since 10.1) QuickTime VDIG FireWire Device driver into a
Quartz Composer Plugin. I've been using the various Plugin examples
from Apple from Leopard (10.5.8) as a starting points.
I have one major stumbling blocks that I can not seem to find any
information and the plugin does it work as expected.
I have a simple ".qtz" composition consisting of our plugin (which
has a single output to an ARGB32/BGRA32 image and no inputs) and
this output is connected to the image input of a billboard object,
which displays the images coming from the hardware.
In the plugin, I have allocated a "- (void) dealloc" method within
the @implementation for the QCPlugin. It's supposed to clean up for
the hardware and deallocate any buffers etc. that were allocated in
the "- (id) init" method of @implementation for the QCPlugin.
When I close the simple ".qtz" composition or Quit the Quartz
Composer (Version 3.1) application, the "- (void) dealloc" method
NEVER gets called, which leaves the hardware unclosed and buffers
undisposed of, which is a huge leak IMHO. I have NSLog statements in
the :dealloc" methods and then never get called at all. So I need to
solve this before I move forward to the next stage.
And doing the dispose in the "- (void) stopExecution:
(id<QCPlugInContext>)context" method of the QCPlugin does not make
sense when using external hardware. If there are multiple hardware
devices and multiple plugins, it should be one plugin per device and
the plugin should exclusively access the hardware for the duration
of it's existence.
Thanks for any suggestions..
Milton J. Aupperle
President
ASC - Aupperle Services and Contracting
Mac Software (Drivers, Components and Application) Specialist
#1106 - 428 Chaparral Ravine View SE.
Calgary Alberta T2X 0N2
1-(403)-453-1624
[email protected]
www.outcastsoft.com
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Quartzcomposer-dev mailing list ([email protected]
)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quartzcomposer-dev/lists%40tobyz.net
This email sent to [email protected]
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Quartzcomposer-dev mailing list ([email protected])
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quartzcomposer-dev/archive%40mail-archive.com
This email sent to [email protected]
