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avutil/opt: Support general expressions involving AVOption constants in set_string_number()

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-07-21 16:00:08 +02:00
parent 88efc013b1
commit 265dadbe7d
1 changed files with 36 additions and 25 deletions
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61
libavutil/opt.c
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@ -129,18 +129,6 @@ static int write_number(void *obj, const AVOption *o, void *dst, double num, int
return 0;
}
static const double const_values[] = {
M_PI,
M_E,
0
};
static const char * const const_names[] = {
"PI",
"E",
0
};
static int hexchar2int(char c) {
if (c >= '0' && c <= '9') return c - '0';
if (c >= 'a' && c <= 'f') return c - 'a' + 10;
@ -220,21 +208,44 @@ static int set_string_number(void *obj, void *target_obj, const AVOption *o, con
buf[i] = 0;
{
const AVOption *o_named = av_opt_find(target_obj, buf, o->unit, 0, 0);
if (o_named && o_named->type == AV_OPT_TYPE_CONST)
d = DEFAULT_NUMVAL(o_named);
else if (!strcmp(buf, "default")) d = DEFAULT_NUMVAL(o);
else if (!strcmp(buf, "max" )) d = o->max;
else if (!strcmp(buf, "min" )) d = o->min;
else if (!strcmp(buf, "none" )) d = 0;
else if (!strcmp(buf, "all" )) d = ~0;
else {
int res = av_expr_parse_and_eval(&d, buf, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);
if (res < 0) {
av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);
return res;
const AVOption *o_named;
int res;
int ci = 0;
double const_values[64];
const char * const_names[64];
if (o->unit) {
for (o_named = NULL; o_named = av_opt_next(target_obj, o_named); ) {
if (o_named->type == AV_OPT_TYPE_CONST &&
o_named->unit &&
!strcmp(o_named->unit, o->unit)) {
if (ci + 6 >= FF_ARRAY_ELEMS(const_values)) {
av_log(obj, AV_LOG_ERROR, "const_values array too small for %s\n", o->unit);
return AVERROR_PATCHWELCOME;
}
const_names [ci ] = o_named->name;
const_values[ci++] = DEFAULT_NUMVAL(o_named);
}
}
}
const_names [ci ] = "default";
const_values[ci++] = DEFAULT_NUMVAL(o);
const_names [ci ] = "max";
const_values[ci++] = o->max;
const_names [ci ] = "min";
const_values[ci++] = o->min;
const_names [ci ] = "none";
const_values[ci++] = 0;
const_names [ci ] = "all";
const_values[ci++] = ~0;
const_names [ci] = NULL;
const_values[ci] = 0;
res = av_expr_parse_and_eval(&d, buf, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);
if (res < 0) {
av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);
return res;
}
}
if (o->type == AV_OPT_TYPE_FLAGS) {
read_number(o, dst, NULL, NULL, &intnum);