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AVOption: add support for dictionary types.

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In order to support metadata being set as an option, it's necessary to be able
to set dictionaries as values.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Andrew Stone
2014-07-31 19:56:34 -04:00
committed by Anton Khirnov
parent afbd4b7e09
commit a8c104a511
4 changed files with 77 additions and 14 deletions
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54
libavutil/opt.c
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@@ -307,6 +307,24 @@ int av_opt_set_bin(void *obj, const char *name, const uint8_t *val, int len, int
return 0;
}
int av_opt_set_dict_val(void *obj, const char *name, const AVDictionary *val, int search_flags)
{
void *target_obj;
AVDictionary **dst;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
if (!o || !target_obj)
return AVERROR_OPTION_NOT_FOUND;
if (o->flags & AV_OPT_FLAG_READONLY)
return AVERROR(EINVAL);
dst = (AVDictionary **)(((uint8_t *)target_obj) + o->offset);
av_dict_free(dst);
av_dict_copy(dst, val, 0);
return 0;
}
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
{
void *dst, *target_obj;
@@ -410,6 +428,23 @@ int av_opt_get_q(void *obj, const char *name, int search_flags, AVRational *out_
return 0;
}
int av_opt_get_dict_val(void *obj, const char *name, int search_flags, AVDictionary **out_val)
{
void *target_obj;
AVDictionary *src;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
if (!o || !target_obj)
return AVERROR_OPTION_NOT_FOUND;
if (o->type != AV_OPT_TYPE_DICT)
return AVERROR(EINVAL);
src = *(AVDictionary **)(((uint8_t *)target_obj) + o->offset);
av_dict_copy(out_val, src, 0);
return 0;
}
int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name)
{
const AVOption *field = av_opt_find(obj, field_name, NULL, 0, 0);
@@ -539,7 +574,8 @@ void av_opt_set_defaults(void *s)
av_opt_set(s, opt->name, opt->default_val.str, 0);
break;
case AV_OPT_TYPE_BINARY:
/* Cannot set default for binary */
case AV_OPT_TYPE_DICT:
/* Cannot set defaults for these types */
break;
default:
av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name);
@@ -621,9 +657,21 @@ int av_set_options_string(void *ctx, const char *opts,
void av_opt_free(void *obj)
{
const AVOption *o = NULL;
while ((o = av_opt_next(obj, o)))
if (o->type == AV_OPT_TYPE_STRING || o->type == AV_OPT_TYPE_BINARY)
while ((o = av_opt_next(obj, o))) {
switch (o->type) {
case AV_OPT_TYPE_STRING:
case AV_OPT_TYPE_BINARY:
av_freep((uint8_t *)obj + o->offset);
break;
case AV_OPT_TYPE_DICT:
av_dict_free((AVDictionary **)(((uint8_t *)obj) + o->offset));
break;
default:
break;
}
}
}
int av_opt_set_dict(void *obj, AVDictionary **options)