On Mi, 2010-06-30 at 14:26 +0100, Harry Van Haaren wrote:
> Hey All,
>
> I've got a function in the JACK.vapi binding, that returns a buffer. Now it
> doesnt "physically"
> return the buffer, but returns a void* to the buffer.
>
> I checked the Vala tutorial for any references to void*, and didnt find
> anything...
>
> This is the function (to be called on a Port object):
> public void* get_buffer(NFrames nframes); // nframes is a uint32..
> not that it matters
>
> And this is what I tried (master_l is of Port type):
> var buffer = master_l.get_buffer(nframes);
>
> And what I want to do with this buffer is the following:
> for(int i = 0; i < (uint32) nframes; i++)
> {
> buffer[i] = array[i]; // have an array of samples, need to write
> them to this void* buffer.
> }
>
You shouldn't expect something like this to work, as you basically
dereference a void* (buffer[i] would be void, but void has no size, so
that won't work). You must always cast it to a pointer of a type with a
size, such as char.
--
Julian Andres Klode - Debian Developer, Ubuntu Member
See http://wiki.debian.org/JulianAndresKlode and http://jak-linux.org/.
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