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Code Issues Releases Activity

avutil/opt: add av_opt_copy()

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2014-05-30 21:04:14 +02:00
parent f028b7af7b
commit 00759d71a2
4 changed files with 48 additions and 1 deletions
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42
libavutil/opt.c
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@ -1539,6 +1539,48 @@ static int opt_size(enum AVOptionType type)
return 0;
}
int av_opt_copy(void *dst, void *src)
{
const AVOption *o = NULL;
const AVClass *c;
int ret = 0;
if (!src)
return 0;
c = *(AVClass**)src;
if (*(AVClass**)dst && c != *(AVClass**)dst)
return AVERROR(EINVAL);
while ((o = av_opt_next(src, o))) {
void *field_dst = ((uint8_t*)dst) + o->offset;
void *field_src = ((uint8_t*)src) + o->offset;
uint8_t **field_dst8 = (uint8_t**)field_dst;
uint8_t **field_src8 = (uint8_t**)field_src;
if (o->type == AV_OPT_TYPE_STRING) {
set_string(dst, o, *field_src8, field_dst8);
if (*field_src8 && !*field_dst8)
ret = AVERROR(ENOMEM);
} else if (o->type == AV_OPT_TYPE_BINARY) {
int len = *(int*)(field_src8 + 1);
if (*field_dst8 != *field_src8)
av_freep(field_dst8);
*field_dst8 = av_memdup(*field_src8, len);
if (len && !*field_dst8) {
ret = AVERROR(ENOMEM);
len = 0;
}
*(int*)(field_dst8 + 1) = len;
} else if (o->type == AV_OPT_TYPE_CONST) {
// do nothing
} else {
memcpy(field_dst, field_src, opt_size(o->type));
}
}
return ret;
}
int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)
{
int ret;