Re: reading Midi from AU
Re: reading Midi from AU
- Subject: Re: reading Midi from AU
- From: Marc Poirier <email@hidden>
- Date: Sun, 11 Jan 2004 11:14:01 -0600 (CST)
This isn't an answer to your question, but do you really want to do this,
or could you accomplish what you want by simply making your effect a
MusicEffect (component type kAudioUnitType_MusicEffect, build with
AUMIDIEffectBase.* and AUMIDIBase.*, etc.)?
But anyway, as to your C++ problem, I think it's just that you're missing
the static keyword before the function prototype in your class definition.
Marc
On Sun, 11 Jan 2004, jacques couzteau wrote:
>
Hello,
>
>
I'm trying to enable my AU (derived from SampleEffectUnit) to read
>
MIDIInput in order to set parameters. I use the SampleTools-Projects
>
which implements a MIDIEcho in the file echo.cpp as an Example.
>
>
There A MIDI-in-port is created with the command MIDIInputPortCreate
>
from CoreMIDI-Framework with the following Line:
>
MIDIInputPortCreate(client, CFSTR("Input port"), MyReadProc, NULL,
>
&inPort);
>
>
In this line the Function MyReadProc is passed as a FunctionPointer as
>
argument to MIDIInputPortCreate.
>
>
I have added MyReadProc to my SampleEffectKernel so it's definition
>
looks like:
>
class SampleEffectKernel : public AUKernelBase{
>
...
>
private:
>
...
>
void MyReadProc(const MIDIPacketList *pktlist, void *refCon, void
>
*connRefCon);
>
...
>
>
static void SampleEffectUnit::SampleEffectKernel::MyReadProc(const
>
MIDIPacketList *pktlist, void *refCon, void *connRefCon)
>
{
>
...
>
}
>
>
If i use that code in my C++ implementaion of my AU i get compile
>
problems in the line where i create my MIDIInPort during instanciation
>
of my SampleEffectKernel
>
>
MIDIInputPortCreate(client, CFSTR("Input port"), MyReadProc, NULL,
>
&inPort);
>
>
because the use of my MyReadProc doesn't match its definition.
>
>
I believe the compiler thinks i want to pass the
>
(non-existant)return-value of MyReadProc to MIDIInputPortCreate.
>
Instead of Passing the function that is supposed to process MIDI-Input.
>
>
How do i get this to work?
>
>
thank you
>
>
jacques
>
>
ps: I'm new to c++ so i might be missing something obvious.
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