Hi,
On Sun, Nov 20, 2016 at 6:57 AM, Michael Niedermayer <[email protected]
> wrote:
> @@ -131,6 +132,20 @@ static int write_number(void *obj, const AVOption *o,
> void *dst, double num, int
> if (intnum == 1 && d == (double)INT64_MAX) *(int64_t *)dst =
> INT64_MAX;
> else *(int64_t *)dst =
> llrint(d) * intnum;
> break;}
> + case AV_OPT_TYPE_UINT64:{
> + double d = num / den;
> + // We must special case uint64_t here as llrint() does not
> support values
> + // outside the int64_t range and there is no portable function
> which does
> + // "INT64_MAX + 1ULL" is used as it is representable exactly as
> IEEE double
> + // while INT64_MAX is not
> + if (intnum == 1 && d == (double)UINT64_MAX) {
> + *(int64_t *)dst = UINT64_MAX;
> + } else if (o->max > INT64_MAX + 1ULL && d > INT64_MAX + 1ULL) {
> + *(uint64_t *)dst = (llrint(d - (INT64_MAX + 1ULL)) +
> (INT64_MAX + 1ULL))*intnum;
> + } else {
> + *(int64_t *)dst = llrint(d) * intnum;
> + }
> + break;}
> case AV_OPT_TYPE_FLOAT:
> *(float *)dst = num * intnum / den;
> break;
For the stupid, like me: what does this do? More specifically, this seems
an integer codepath, but there is a double in there. Why?
Ronald
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