FF_OPT_TYPE_DOUBLE   70 libavcodec/opt.c     case FF_OPT_TYPE_DOUBLE:*(double    *)dst= num*intnum/den;         break;
FF_OPT_TYPE_DOUBLE  253 libavcodec/opt.c     case FF_OPT_TYPE_DOUBLE:    snprintf(buf, buf_len, "%f" , *(double *)dst);break;
FF_OPT_TYPE_DOUBLE  282 libavcodec/opt.c     case FF_OPT_TYPE_DOUBLE:    *num=    *(double *)dst;return 0;
FF_OPT_TYPE_DOUBLE  356 libavcodec/opt.c             case FF_OPT_TYPE_DOUBLE: