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

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
> 
>