av_get_double     179 libavcodec/opt.c                 if     (cmd=='+') d= notfirst*av_get_double(obj, name, NULL) + d;
av_get_double     180 libavcodec/opt.c                 else if(cmd=='-') d= notfirst*av_get_double(obj, name, NULL) - d;
av_get_double     147 libavcodec/opt.h double av_get_double(void *obj, const char *name, const AVOption **o_out);