}
//如果当前操作项存在但是下一个操作项的操作名不存在
else if (last)
{
return NULL;
}
//如果当前操作项不存在
else
{
return (*(AVClass **)obj)->option;
}
}
注释 1-1-1-2：
const AVOption *av_set_int(void *obj, const char *name, int64_t n)
{
//codeInCK
return av_set_number(obj, name, 1, 1, n);//注释 1-1-1-2-1
}
注释 1-1-1-2-1：
static const AVOption *av_set_number(void *obj, const char *name, double num, int den,
int64_t intnum)
{
//codeInCK
const AVOption *o = NULL;
if (av_set_number2(obj, name, num, den, intnum, &o) < 0)//注释 1-1-1-2-1-1
{
return NULL;
}
else
{
return o;
}
}
注释 1-1-1-2-1-1：
static int av_set_number2(void *obj,
const char *name,
double num,
int den,
int64_t intnum,
const AVOption **o_out)
{
//codeInCK
const AVOption *o =
av_find_opt(obj, name, NULL, 0, 0);注释 1-1-1-2-1-1-1
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