Tim Hockin wrote:
On Fri, Mar 19, 2004 at 03:24:54PM -0500, Ron Kuper wrote:
I think it's possible to provide UST as a separate standalone object, and make it part of the GMPI library. This pretty much how DirectX does it with their IReferenceClock. They provide a default reference clock as a COM object that hangs off the system clock. If you've written an audio renderer, and you want others in the graph to sync to you, you expose a reference clock. The graph manager snoops around to see who has a clock, and uses what it finds. With this approach a host doesn't need to know or care.
Well, to be useful, the clock needs to be consulted before any plugins start processing(). The simplest specification is to say that the host provides the clock. The work of actually manipulating a clock source and converting to nanos can be in the GMPI lib.
The host coder will not need to do that work (as little as it may be). All they will need is to call into that clock to get the timestamps and pass it along to plugins.
Mike, is this still a problem?
-- Mike Berry Adobe Systems
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