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AVOptions: split get_number().

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Split actual writing to read_number() in the same way as write_number().
Allows set_string_number() to write to a caller-provided destination.
This commit is contained in:
Anton Khirnov 2011-08-23 14:25:56 +02:00
parent 41d9d51a72
commit 059a037fbd
1 changed files with 26 additions and 16 deletions
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42
libavutil/opt.c
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@ -54,6 +54,21 @@ const AVOption *av_next_option(void *obj, const AVOption *last)
else return (*(AVClass**)obj)->option;
}
static int read_number(const AVOption *o, void *dst, double *num, int *den, int64_t *intnum)
{
switch (o->type) {
case FF_OPT_TYPE_FLAGS: *intnum = *(unsigned int*)dst;return 0;
case FF_OPT_TYPE_INT: *intnum = *(int *)dst;return 0;
case FF_OPT_TYPE_INT64: *intnum = *(int64_t *)dst;return 0;
case FF_OPT_TYPE_FLOAT: *num = *(float *)dst;return 0;
case FF_OPT_TYPE_DOUBLE: *num = *(double *)dst;return 0;
case FF_OPT_TYPE_RATIONAL: *intnum = ((AVRational*)dst)->num;
*den = ((AVRational*)dst)->den;
return 0;
}
return AVERROR(EINVAL);
}
static int write_number(void *obj, const AVOption *o, void *dst, double num, int den, int64_t intnum)
{
if (o->max*den < num*intnum || o->min*den > num*intnum) {
@ -138,10 +153,11 @@ static int set_string_number(void *obj, const AVOption *o, const char *val, void
{
int ret = 0, notfirst = 0;
for (;;) {
int i;
int i, den = 1;
char buf[256];
int cmd = 0;
double d;
double d, num = 1;
int64_t intnum = 1;
if (*val == '+' || *val == '-')
cmd = *(val++);
@ -168,11 +184,13 @@ static int set_string_number(void *obj, const AVOption *o, const char *val, void
}
}
if (o->type == FF_OPT_TYPE_FLAGS) {
if (cmd == '+') d = av_get_int(obj, o->name, NULL) | (int64_t)d;
else if (cmd == '-') d = av_get_int(obj, o->name, NULL) &~(int64_t)d;
read_number(o, dst, NULL, NULL, &intnum);
if (cmd == '+') d = intnum | (int64_t)d;
else if (cmd == '-') d = intnum &~(int64_t)d;
} else {
if (cmd == '+') d = notfirst*av_get_double(obj, o->name, NULL) + d;
else if (cmd == '-') d = notfirst*av_get_double(obj, o->name, NULL) - d;
read_number(o, dst, &num, &den, &intnum);
if (cmd == '+') d = notfirst*num*intnum/den + d;
else if (cmd == '-') d = notfirst*num*intnum/den - d;
}
if ((ret = write_number(obj, o, dst, d, 1, 1)) < 0)
@ -373,16 +391,8 @@ static int get_number(void *obj, const char *name, const AVOption **o_out, doubl
if (o_out) *o_out= o;
switch (o->type) {
case FF_OPT_TYPE_FLAGS: *intnum= *(unsigned int*)dst;return 0;
case FF_OPT_TYPE_INT: *intnum= *(int *)dst;return 0;
case FF_OPT_TYPE_INT64: *intnum= *(int64_t*)dst;return 0;
case FF_OPT_TYPE_FLOAT: *num= *(float *)dst;return 0;
case FF_OPT_TYPE_DOUBLE: *num= *(double *)dst;return 0;
case FF_OPT_TYPE_RATIONAL: *intnum= ((AVRational*)dst)->num;
*den = ((AVRational*)dst)->den;
return 0;
}
return read_number(o, dst, num, den, intnum);
error:
*den=*intnum=0;
return -1;