Re: [Csnd-dev] [EXTERNAL] [Csnd-dev] New API progress report

https://github.com/csound/csound/blob/develop/include/plugin.h

On Sat 27 Jul 2024, 14:13 Michael Gogins, <[email protected]> wrote:

> what is CPOF?
>
> On Sat, Jul 27, 2024, 07:10 vlz <[email protected]> wrote:
>
>> yes, that's right.
>> Btw you can access any functions from the CSOUND structure by taking the
>> CSOUND pointer with the relevant method in CPOF.
>>
>> Prof. Victor Lazzarini
>> Maynooth University
>> Ireland
>>
>> On 27 Jul 2024, at 12:04, Rory Walsh <[email protected]> wrote:
>>
>> 
>> I see it now in plugin.h, that's great. I'll give it a go for Cabbage 3.
>> Actually, I can start using it now with Csound 6 right?
>>
>> On Sat 27 Jul 2024, 12:58 Rory Walsh, <[email protected]> wrote:
>>
>>> I can access host data using the CPOF? I never thought of this.
>>>
>>> On Sat, 27 Jul 2024 at 12:51, vlz <[email protected]> wrote:
>>>
>>>> I think you should use hostdata for passing anything from host to
>>>> Csound and vice-versa.
>>>>
>>>> It is probably more straightforward as you just pass the pointers
>>>> directly. Would that be a problem?
>>>>
>>>> Prof. Victor Lazzarini
>>>> Maynooth University
>>>> Ireland
>>>>
>>>> On 27 Jul 2024, at 11:12, Rory Walsh <[email protected]> wrote:
>>>>
>>>> 
>>>> With regards to:
>>>>
>>>> > csoundQueryGlobalVariable
>>>> > csoundCreateGlobalVariable
>>>>
>>>> I have been using these methods to pass custom data structs between my
>>>> opcodes and my host. I should have mentioned this earlier, but they slipped
>>>> my attention. For example, some of my Csound opcodes can access widget
>>>> classes owned by Cabbage. Perhaps it was never meant to be used in this
>>>> way, but it's super powerful. I'm not sure how I can do this without them?
>>>>
>>>> On Sat, 27 Jul 2024 at 11:20, Victor Lazzarini <
>>>> [email protected]> wrote:
>>>>
>>>>> Hi Tarmo,
>>>>>
>>>>> that’s great, this is one of the reasons we needed your input, so the
>>>>> API can be tailored to the
>>>>> needs of users.
>>>>>
>>>>> Regarding your issue, make sure the call is always after
>>>>> csoundStart(), otherwise the spout will
>>>>> not have been created. Here’s a simple test to show it
>>>>>
>>>>>     csoundStart(Csound);
>>>>>     MYFLT *spout = csoundGetSpout(Csound);
>>>>>     printf("spout = %p \n", spout)
>>>>>
>>>>> best
>>>>> ========================
>>>>> Prof. Victor Lazzarini
>>>>> Maynooth University
>>>>> Ireland
>>>>>
>>>>> > On 27 Jul 2024, at 09:31, Tarmo Johannes <[email protected]> wrote:
>>>>> >
>>>>> > Hi Victor!
>>>>> >
>>>>> > Thank you for the changes, it helps a lot.
>>>>> >
>>>>> > > csoundGetModule
>>>>> > > csoundSetMIDIModule
>>>>> > > csoundSetRTAudioModule
>>>>> >
>>>>> > Are used in config dialog to populate a menu to list the available
>>>>> modules. Now it works fine again.
>>>>> > I reverted some of my changes, left libcsnd out of libraries (this
>>>>> is good news that it is not needed any more!) and CsoundQt build fine.
>>>>> >
>>>>> > I still get crash when running a csd.
>>>>> > MYFLT *outputBuffer = csoundGetSpout(udata->csound);
>>>>> > returns 0 in some reason, I will see if I can figure out the reason
>>>>> later.
>>>>> >
>>>>> > Thanks!
>>>>> > tarmo
>>>>> >
>>>>> > Kontakt Victor Lazzarini (<
>>>>> [email protected]>) kirjutas
>>>>> kuupäeval L, 27. juuli 2024 kell 00:55:
>>>>> > Hi Tarmo,
>>>>> >
>>>>> > I put back
>>>>> >
>>>>> > > csoundGetModule
>>>>> > > csoundSetMIDIModule
>>>>> > > csoundSetRTAudioModule
>>>>> >
>>>>> > plus the set global env and the circular buffer functions. It’s in
>>>>> the repo now.
>>>>> >
>>>>> > Best
>>>>> >
>>>>> > Victor
>>>>> >
>>>>> > > On 26 Jul 2024, at 20:29, Tarmo Johannes <[email protected]>
>>>>> wrote:
>>>>> > >
>>>>> > > *Warning*
>>>>> > > This email originated from outside of Maynooth University's Mail
>>>>> System. Do not reply, click links or open attachments unless you recognise
>>>>> the sender and know the content is safe.
>>>>> > > Hi!
>>>>> > >
>>>>> > > I tried out the new API from feature/newapi branch.
>>>>> > >
>>>>> > > Building csound7 went fine, I installed it to $HOME/.local (Linux)
>>>>> and added  $HOME/.local/lib to ldconfig libraries' path.
>>>>> > >
>>>>> > > First I tried it with a relatively simple Qt project using Csound
>>>>> C++ API (csound.hpp). After some changes everything worked fine. One
>>>>> question:
>>>>> > >
>>>>> > > when before there was Csound::stop() / csoundStop() , how is it
>>>>> now the proper way to end Csound's work? Also csoundCleanup() is gone. is
>>>>> csoundReset() it that does it all?
>>>>> > >
>>>>> > > Then I went to CsoundQt and of course that is much, much more
>>>>> complex  case.
>>>>> > >
>>>>> > > First -  I guess libcsnd7 is not  is built by default? Is it still
>>>>> existing, how should I configure it?  CsoundQt uses that for recording.
>>>>> Maybe there is now a better way to rewrite the recording part.
>>>>> > >
>>>>> > > CsoundQt used the following functions that are not to be there any
>>>>> more:
>>>>> > >
>>>>> > > csoundGetModule
>>>>> > > csoundSetMIDIModule
>>>>> > > csoundSetRTAudioModule
>>>>> > >
>>>>> > > I commented these lines out for now to move on. What covers their
>>>>> functionality?
>>>>> > >
>>>>> > > There is no more circular buffer functions:
>>>>> > > csoundCreateCircularBuffer
>>>>> > > csoundReadCircularBuffer
>>>>> > > etc
>>>>> > >
>>>>> > > CsoundQt leaned heavily on them for internal MIDI handling. What
>>>>> is the correct way to handle it now?
>>>>> > > For example reading MIDI data one should set the callback like:
>>>>> > >         csoundSetExternalMidiReadCallback(ud->csound, &midiReadCb);
>>>>> > >
>>>>> > > CsoundQt used to have such a function for the callback:
>>>>> > >
>>>>> > > int CsoundEngine::midiReadCb(CSOUND *csound, void *ud_, unsigned
>>>>> char *buf, int nBytes)
>>>>> > > {
>>>>> > >     CsoundUserData *ud = (CsoundUserData *) ud_;
>>>>> > >     Q_UNUSED(csound);
>>>>> > >     int count, countVirtual;
>>>>> > >     count =  csoundReadCircularBuffer(ud->csound, ud->midiBuffer,
>>>>> buf, nBytes);
>>>>> > >     countVirtual =  csoundReadCircularBuffer(ud->csound,
>>>>> ud->virtualMidiBuffer, buf + count, nBytes - count);
>>>>> > >     return count + countVirtual;
>>>>> > > }
>>>>> > >
>>>>> > > Should the host implement writing to the buffer and handling the
>>>>> index itself?
>>>>> > >
>>>>> > > Is it so that csoundSetHostImplementedMIDIIO is replaced now with
>>>>>
>>>>> > > PUBLIC void csoundSetHostMIDIIO(CSOUND *csound);
>>>>> > >
>>>>> > > How to deal with global variables?
>>>>> > > csoundQueryGlobalVariable
>>>>> > > csoundCreateGlobalVariable
>>>>> > > are gone,
>>>>> > >
>>>>> > > csoundGetEnv is there but no csoundSetEnv, csoundSetGlobalEnv or
>>>>> similar?
>>>>> > >
>>>>> > > at the moment I replaced them with Qt specific functions to deal
>>>>> with environment variables.
>>>>> > >
>>>>> > > What is the correct environment variable for the plugins
>>>>> directory, OPCODE7DIR64?
>>>>> > >
>>>>> > > I got CsoundQt building but it crashes when I run a file. I did
>>>>> not have time yet to dig into it,  there are many possible reasons.  I hope
>>>>> to continue tomorrow.
>>>>> > >
>>>>> > > Exciting!
>>>>> > > tarmo
>>>>> > >
>>>>> > > Kontakt Victor Lazzarini (<
>>>>> [email protected]>) kirjutas
>>>>> kuupäeval N, 25. juuli 2024 kell 18:27:
>>>>> > >
>>>>> > > Just another progress report for the feature/newapi branch
>>>>> > >
>>>>> > > - I have now mainlined the new API in csound.h
>>>>> > > - Updated the csound.hpp wrapper
>>>>> > > - Updated the csPerformanceThread code
>>>>> > > - Modified frontends to use it
>>>>> > > - Modified the C++ test suite
>>>>> > >
>>>>> > > It is all working, I guess frontend developers can take a look and
>>>>> see what they
>>>>> > > think.
>>>>> > >
>>>>> > > François: could you take a look at the Python wrapper? It is out
>>>>> of sync now.
>>>>> > >
>>>>> > > Victor
>>>>> > >
>>>>> > >
>>>>> >
>>>>>
>>>>>