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avoptions: Add an av_opt_flag_is_set function for inspecting flag fields 

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2011-05-27 22:21:40 +03:00
parent 0558e266a2
commit cb7c11cc9e
4 changed files with 24 additions and 1 deletions
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3
doc/APIchanges
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@ -13,6 +13,9 @@ libavutil: 2011-04-18
API changes, most recent first:
2011-06-xx - xxxxxxx - lavu 51.6.0 - opt.h
Add av_opt_flag_is_set().
2011-06-xx - xxxxxxx - lavu 51.5.0 - AVMetadata
Move AVMetadata from lavf to lavu and rename it to
AVDictionary -- new installed header dict.h.

2
libavutil/avutil.h
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@ -40,7 +40,7 @@
#define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
#define LIBAVUTIL_VERSION_MAJOR 51
#define LIBAVUTIL_VERSION_MINOR 5
#define LIBAVUTIL_VERSION_MINOR 6
#define LIBAVUTIL_VERSION_MICRO 0
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \

10
libavutil/opt.c
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@ -320,6 +320,16 @@ int64_t av_get_int(void *obj, const char *name, const AVOption **o_out)
return num*intnum/den;
}
int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name)
{
const AVOption *field = av_find_opt(obj, field_name, NULL, 0, 0);
const AVOption *flag = av_find_opt(obj, flag_name, NULL, 0, 0);
if (!field || !flag || flag->type != FF_OPT_TYPE_CONST)
return 0;
return av_get_int(obj, field_name, NULL) & (int) flag->default_val.dbl;
}
static void opt_list(void *obj, void *av_log_obj, const char *unit,
int req_flags, int rej_flags)
{

10
libavutil/opt.h
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@ -181,4 +181,14 @@ int av_set_options_string(void *ctx, const char *opts,
*/
void av_opt_free(void *obj);
/**
* Check whether a particular flag is set in a flags field.
*
* @param field_name the name of the flag field option
* @param flag_name the name of the flag to check
* @return non-zero if the flag is set, zero if the flag isn't set,
* isn't of the right type, or the flags field doesn't exist.
*/
int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name);
#endif /* AVUTIL_OPT_H */