This group of functions can be used to evaluate option strings and get numbers out of them.
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Functions |
int | av_opt_eval_flags (void *obj, const AVOption *o, const char *val, int *flags_out) |
int | av_opt_eval_int (void *obj, const AVOption *o, const char *val, int *int_out) |
int | av_opt_eval_int64 (void *obj, const AVOption *o, const char *val, int64_t *int64_out) |
int | av_opt_eval_float (void *obj, const AVOption *o, const char *val, float *float_out) |
int | av_opt_eval_double (void *obj, const AVOption *o, const char *val, double *double_out) |
int | av_opt_eval_q (void *obj, const AVOption *o, const char *val, AVRational *q_out) |
Detailed Description
This group of functions can be used to evaluate option strings and get numbers out of them.
They do the same thing as av_opt_set(), except the result is written into the caller-supplied pointer.
- Parameters:
-
obj | a struct whose first element is a pointer to AVClass. |
o | an option for which the string is to be evaluated. |
val | string to be evaluated. |
*_out | value of the string will be written here. |
- Returns:
- 0 on success, a negative number on failure.
Function Documentation