Re: [Csnd-dev] [EXTERNAL] Re: [Csnd-dev] New API - updates

Here’s a couple of examples showing how to access array channels

1) Directly using a channel data pointer

  CSOUND  *csound;
  ARRAYDAT *adat;
  int   n;

  const char *code = R"ORC(
   instr 1
   kArr[] fillarray 1,2,3,4
   chnset kArr, "test"
   kArr2[] chnget "test"
   printk2 kArr2[3]
   endin
   )ORC";

  csound = csoundCreate(NULL, NULL);
  csoundSetOption(csound,"-n");
  csoundCompileOrc(csound, code, 0);
  csoundEventString(csound, "i1 0 1", 0);
  csoundStart(csound);
  csoundPerformKsmps(csound);

  // access channel directly
  csoundGetChannelPtr(csound, (void **) &adat, "test", CSOUND_ARRAY_CHANNEL
                      | CSOUND_INPUT_CHANNEL);
  
  for(n = 0; n < adat->sizes[0]; n++)
    printf("[%d]: %f \n", n, adat->data[n]);

  csoundDestroy(csound);


2) Using an externally allocated array data, copying from channel (same orc code as above)

  // 1-D array size
  sizes[0] = 4;
  // create array data
  adat = csoundCreateArrayData(csound, 'k', 1, sizes);
  
  csoundStart(csound);
  csoundPerformKsmps(csound);

  // copy data from array channel
  csoundGetArrayChannel(csound, "test", adat);
  
  for(n = 0; n < adat->sizes[0]; n++)
    printf("[%d]: %f \n", n, adat->data[n]);

  // dispose of array data
  csoundDeleteArrayData(csound, adat)


========================
Prof. Victor Lazzarini
Maynooth University
Ireland

> On 8 Aug 2024, at 14:52, Victor Lazzarini <[email protected]> wrote:
> 
> Great. I have not tested it myself but will post a simple example soon. 
> 
> 
> Prof. Victor Lazzarini 
> Maynooth University
> Ireland
> 
>> On 8 Aug 2024, at 13:48, Pierre Clisson <[email protected]> wrote:
>> 
>>  Thank you Victor and François for implenting the array type for channels. Just what I needed :) Will test this as soon as I get a chance
>> 
>> Pierre.
>> 
>> Francois PINOT wrote on 08/08/2024 14:04:
>>> Just committed these updates for ctcsound.py. 
>>> 
>>> François
>>> 
>>> Le mer. 7 août 2024 à 18:31, Victor Lazzarini <[email protected]> a écrit :
>>> Just  a few updates on the new API branch (feature/newapi)
>>> 
>>> - Implemented array type for channels
>>> - overhauled the PVS channels
>>> - added the relevant API functions
>>> - protected spout by making the csoundGetSpout function return const MYFLT *
>>> 
>>> I think I am pretty much done with the API revision.
>>> ========================
>>> Prof. Victor Lazzarini
>>> Maynooth University
>>> Ireland
>>