[PD] external with more than 6 inlets possible?

[Claude Heiland-Allen]

On 16/03/16 13:37, Claude Heiland-Allen wrote:
> On 16/03/16 13:25, i go bananas wrote:
>> pd using the same address for inlets and outlets as an
>> optimisation?
>
> Yes, Pd recycles signal vectors so your output vector could be the same
> as the input vector, which means this code is unsafe because it could
> trash the inputs:
>
>    // loop through the 4 oscillators, adding the left to right:
>    for (int osc = 0; osc < 4; osc++)
>    {
>      int n = (int)(w[14]);
>      while (n--) *output[osc]++ = *left[osc]++ + *right[osc]++;
>    }
>
> The easiest fix would be to reverse the order of the loops:
>
>    int n = (int)(w[14]);
>    while (n--)
>    {
>      for (int osc = 0; osc < 4; osc++)
>        *output[osc] = *left[osc] + *right[osc];
>      output++;
>      left++;
>      right++;
>    }

oops, this is wrong, I think

maybe *output[osc]++ = *left[osc]++ + *right[osc]++; would work in the 
inner loop in fact, I'm just not sure of the order of the C operations 
here...

>
> Your alternative method of changing the iolet creation orders is not a
> fix, it might "work" for one particular patch but another patch could
> break it again.
>
>
> Claude