Re: CoreMIDI bug reporting available ports?
Re: CoreMIDI bug reporting available ports?
- Subject: Re: CoreMIDI bug reporting available ports?
- From: Gary Scavone <email@hidden>
- Date: Mon, 27 Aug 2012 09:35:48 -0400
Thanks Peter. I was aware of the NotifyProc option but it just seems to me that functions like MIDIGetNumberOfDestinations() should be able to report accurate values at any time. Why w(sh)ouldn't this be the case?
Regards,
--gary
On 2012-08-26, at 9:20 PM, "support (One Red Dog Media)" <email@hidden> wrote:
> Hi
>
> You have to register a NotifyProc then listen for the message kMIDIMsgSetupChanged. So you'd called
>
> MIDIClientCreate(CFSTR("some name"), notifyProc, this, &client);
>
> Then
>
> void notifyProc(const MIDINotification* message, void* refCon)
> {
> switch (message->messageID)
> {
> case kMIDIMsgSetupChanged:
> {
> // here we can see ports that have been changed
> }
> break;
> case kMIDIMsgObjectAdded:
> // etc etc
> }
> }
>
> regards
> Peter
> One Red Dog Media
>
>
>
> On 27/08/2012, at 11:12 AM, Gary Scavone <email@hidden>
> wrote:
>
>> Perhaps I am misunderstanding something but it appears that CoreMIDI does not correctly report new or closed ports once an application is running. Below is a simple C++ program to return the number of available MIDI sources and destinations. It blocks at the cin.get() function so that you can open or close programs that create ports (or plug or unplug physical devices). I've tried it in 10.7 and 10.8 and the number of sources and destinations is never correctly updated when I make changes to my available MIDI ports after the program is running.
>>
>> Regards,
>>
>> --gary
>>
>> ====================================
>> #include <CoreMIDI/CoreMIDI.h>
>> #include <iostream>
>> #include <cstdlib>
>>
>> int main()
>> {
>> int counter = 0;
>>
>> do {
>>
>> uint32_t nPorts = MIDIGetNumberOfSources();
>> std::cout << "# of sources = " << nPorts << std::endl;
>> nPorts = MIDIGetNumberOfDestinations();
>> std::cout << "# of destinations = " << nPorts << std::endl;
>> nPorts = MIDIGetNumberOfDevices();
>> std::cout << "# of devices = " << nPorts << std::endl;
>>
>> char input;
>> std::cout << "hit <return>" << std::endl;
>> std::cin.get(input);
>> counter++;
>> } while ( counter < 5 );
>>
>> return 0;
>> }
>> ====================================
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