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

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
>>> > >
>>> > >
>>> >
>>>
>>>