[PD-dev] external crashing when block size changes

Alexandros Drymonitis adrcki at gmail.com
Wed Sep 20 09:07:18 CEST 2023


Both of you were right. The 2 wasn't necessary, and indeed, I forgot to 
multiply by the element type.

Thanks for the casting to t_int tip, wasn't aware of that.

On 9/19/23 23:17, Christof Ressi wrote:
>
>> what is this "2" supposed to represent? 
> This looks like a mistake to me. The buffer certainly does not have to 
> be twice as large, as it is only used to copy the input.
>
> To solve the mystery, you don't allocate the right amount of memory 
> because you forgot about the element type:
>
> x->bufbytes = x->chnls * sp[0]->s_n * sizeof(t_sample);
>
> BTW, "bufbytes" is a bit redundant, as you can just calculate it from 
> "x->blksize".
>
> ---
>
>> dsp_add(var_io_tilde_perform, 2, x, sp[0]->s_n);
>
> ALWAYS cast integers to "t_int" before passing them to "dsp_add"; 
> otherwise it might crash on certain platforms. Here's the correct version:
>
> dsp_add(var_io_tilde_perform, 2, x, (t_int)sp[0]->s_n);
>
> Christof
>
> On 19.09.2023 20:33, IOhannes m zmölnig wrote:
>> On 9/19/23 20:02, Alexandros Drymonitis wrote:
>>>          x->bufbytes = x->chnls*2*sp[0]->s_n;
>>
>> what is this "2" supposed to represent?
>>
>> mfdsar
>> IOhannes
>>
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