I am trying to wrap ffmpeg. I am having an issue with a C array.
The issue is with the following code
[libavutil/channel_layout.h](https://github.com/FFmpeg/FFmpeg/blob/release/6.1/libavutil/channel_layout.h#L372-L390).
I have tried with c2nim, futhark and nimterop without success.
I understand that `AV_CHANNEL_LAYOUT_MASK` creates an array. For example, I
understand that `AV_CHANNEL_LAYOUT_STEREO`will be `{AV_CHANNEL_ORDER_NATIVE, 2,
AV_CH_LAYOUT_STEREO, NULL}` where `AV_CH_LAYOUT_STEREO` is
`(AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT)` so it will be an interger.
I tried something like:
{.passL:"-lavutil".}
let AV_CH_FRONT_LEFT
{.importc:"AV_CH_FRONT_LEFT",header:"libavutil/channel_layout.h".} :cint
echo AV_CH_FRONT_LEFT # This works
let AV_CHANNEL_LAYOUT_STEREO {.importc:"AV_CHANNEL_LAYOUT_STEREO",
header:"libavutil/channel_layout.h".} :ptr UncheckedArray[cint]
echo AV_CHANNEL_LAYOUT_STEREO[0] # not working
Run
it fails:
/@mprueba.nim.c:184:98: error: expected ‘)’ before ‘[’ token
184 | = dollar___systemZdollars_u8(((NI)
(AV_CHANNEL_LAYOUT_STEREO[((NI)0)])));
| ^
Error: execution of an external compiler program 'gcc -c -w -fmax-errors=3
-pthread -I/home/jose/.choosenim/toolchains/nim-2.0.2/lib -I/tmp -o
/home/jose/.cache/nim/prueba_d/@mprueba.nim.c.o
/home/jose/.cache/nim/prueba_d/@mprueba.nim.c' failed with exit code: 1
Run
Any suggestion about how to access
[AV_CHANNEL_LAYOUT_STEREO](https://github.com/FFmpeg/FFmpeg/blob/1606aab99bd84f0040fb0fa6ccccb092941f01ec/libavutil/channel_layout.h#L383).
