diff options
Diffstat (limited to 'libavutil/opt.c')
| -rw-r--r-- | libavutil/opt.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/libavutil/opt.c b/libavutil/opt.c index b4dd0fd0c1..694295dc35 100644 --- a/libavutil/opt.c +++ b/libavutil/opt.c @@ -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; |