Re: Re: CallHostTransportState
Re: Re: CallHostTransportState
- Subject: Re: Re: CallHostTransportState
- From: <email@hidden>
- Date: Sun, 1 Aug 2004 17:10:39 +0000
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From: <email@hidden>
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Date: 2004/07/29 to AM 12:30:00 GMT
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To: CoreAudio API <email@hidden>
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Dmne: Re: Re: CallHostTransportState
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> From: Jeremy Sagan <email@hidden>
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> Date: 2004/07/28 on PM 11:34:49 GMT
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> To: <email@hidden>
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> CC: CoreAudio API <email@hidden>
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> Dmne: Re: CallHostTransportState
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> Metro supports this in the latest version but after setting a
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> breakpoint in my development code, no plug-in has had the nerve to hit
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> it yet. Do you dare to be first?
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>
I have actually noticed that Metro doesn't crash when I make
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the call ;-) I thought this was because it explicitly denied the
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service. But now I will take a closer look. I am mainly interested
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in the position of the endpoints of the cycle interval.
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/Olof W
Yepp, 6.1 only correctly refuses the service but 6.21 accepts
and delivers. I have some trouble interpreting the results though.
What I really need is the exact cycle endpoints in samples.
The cycle intervals are delivered in beats however and so I
need to be able to rescale beats to samples with accuracy.
The formula I use for this is
beats = 60 * tempo * samples / sample_rate
What bothers me is that when I take the currentBeat from the
CallHostBeatAndTempo and rescale it to samples I don't
get the same value as that given by CurrentSampleInTimeLine
of CallHostTransportState, which I sort of expected to.
Perhaps they are not supposed to be the same.
/Olof W
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> On Jul 28, 2004, at 7:25 PM, <email@hidden> wrote:
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>
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> >> From: <email@hidden>
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> >> Date: 2004/07/27 ti PM 01:02:33 GMT
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> >> To: CoreAudio API <email@hidden>
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> >> Dmne: CallHostTransportState
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> >>
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> >> Is it OK to query the host for transport information yet?
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> >> I found the CallHostTransportState() to be inside a comment
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> >> in the 1.3.1 SDK. I tried to use it anyway but I get mostly
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> >> crashes out of Logic 6.4.1. Cannot really tell if it ever
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> >> returns anything useful.
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> >
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> > Has anybody tried to use the HostCallback_GetTransportState?
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> > Did it work? Did it not?
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> >
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> > Host developers, do you supports this?
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> >
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> > /Olof W
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