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avutil/opt: add support for children objects in av_opt_serialize

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Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2024-04-12 19:10:25 -03:00
parent 855d4b5254
commit 8616cfe089
6 changed files with 100 additions and 30 deletions
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73
libavutil/opt.c
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@ -2386,14 +2386,54 @@ int av_opt_is_set_to_default_by_name(void *obj, const char *name, int search_fla
return av_opt_is_set_to_default(target, o);
}
static int opt_serialize(void *obj, int opt_flags, int flags, int *cnt,
AVBPrint *bprint, const char key_val_sep, const char pairs_sep)
{
const AVOption *o = NULL;
void *child = NULL;
uint8_t *buf;
int ret;
const char special_chars[] = {pairs_sep, key_val_sep, '\0'};
if (flags & AV_OPT_SERIALIZE_SEARCH_CHILDREN)
while (child = av_opt_child_next(obj, child)) {
ret = opt_serialize(child, opt_flags, flags, cnt, bprint,
key_val_sep, pairs_sep);
if (ret < 0)
return ret;
}
while (o = av_opt_next(obj, o)) {
if (o->type == AV_OPT_TYPE_CONST)
continue;
if ((flags & AV_OPT_SERIALIZE_OPT_FLAGS_EXACT) && o->flags != opt_flags)
continue;
else if (((o->flags & opt_flags) != opt_flags))
continue;
if (flags & AV_OPT_SERIALIZE_SKIP_DEFAULTS && av_opt_is_set_to_default(obj, o) > 0)
continue;
if ((ret = av_opt_get(obj, o->name, 0, &buf)) < 0) {
av_bprint_finalize(bprint, NULL);
return ret;
}
if (buf) {
if ((*cnt)++)
av_bprint_append_data(bprint, &pairs_sep, 1);
av_bprint_escape(bprint, o->name, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
av_bprint_append_data(bprint, &key_val_sep, 1);
av_bprint_escape(bprint, buf, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
av_freep(&buf);
}
}
return 0;
}
int av_opt_serialize(void *obj, int opt_flags, int flags, char **buffer,
const char key_val_sep, const char pairs_sep)
{
const AVOption *o = NULL;
uint8_t *buf;
AVBPrint bprint;
int ret, cnt = 0;
const char special_chars[] = {pairs_sep, key_val_sep, '\0'};
if (pairs_sep == '\0' || key_val_sep == '\0' || pairs_sep == key_val_sep ||
pairs_sep == '\\' || key_val_sep == '\\') {
@ -2407,28 +2447,11 @@ int av_opt_serialize(void *obj, int opt_flags, int flags, char **buffer,
*buffer = NULL;
av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
while (o = av_opt_next(obj, o)) {
if (o->type == AV_OPT_TYPE_CONST)
continue;
if ((flags & AV_OPT_SERIALIZE_OPT_FLAGS_EXACT) && o->flags != opt_flags)
continue;
else if (((o->flags & opt_flags) != opt_flags))
continue;
if (flags & AV_OPT_SERIALIZE_SKIP_DEFAULTS && av_opt_is_set_to_default(obj, o) > 0)
continue;
if ((ret = av_opt_get(obj, o->name, 0, &buf)) < 0) {
av_bprint_finalize(&bprint, NULL);
return ret;
}
if (buf) {
if (cnt++)
av_bprint_append_data(&bprint, &pairs_sep, 1);
av_bprint_escape(&bprint, o->name, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
av_bprint_append_data(&bprint, &key_val_sep, 1);
av_bprint_escape(&bprint, buf, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
av_freep(&buf);
}
}
ret = opt_serialize(obj, opt_flags, flags, &cnt, &bprint,
key_val_sep, pairs_sep);
if (ret < 0)
return ret;
ret = av_bprint_finalize(&bprint, buffer);
if (ret < 0)
return ret;