Linking with FFmpeg
Johannes Pfau
nospam at example.com
Sun Jan 6 04:46:04 PST 2013
Am Sun, 06 Jan 2013 10:48:25 +0100
schrieb "MrOrdinaire" <mrordinaire at gmail.com>:
> Hi,
>
> I am working on D bindings for FFmpeg. I am trying to port the
> official examples of FFmpeg to D so that the bindings can be
> tested.
>
> My question is how this function declaration is written in D.
> int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
> int w, int h, enum AVPixelFormat pix_fmt, int
> align);
>
My C is pretty bad, is uint8_t *pointers[4] a static array with 4
elements of uint8_t* or is it a pointer to a static array with 4
uint8_t elements?
I guess it's the former, so in D it's (uint8_t*)[4] or better
(ubyte*)[4]. In D static arrays are passed by value, in C by reference,
so you have to do this:
extern(C) int av_image_alloc(ref (ubyte*)[4] pointers, ref int[4]
linesizes, int w, int h, AVPixelFormat pix_fmt, int align_);
Some more information is here:
http://dlang.org/interfaceToC.html
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