read snappy compressed files in spark

[Ricky]

I wanna be able to read snappy compressed files in spark. I can do a
val df = spark.read.textFile("hdfs:// path")
and it passes that test in spark shell but beyond that when i do a
df.show(10,false) or something - it shows me binary data mixed with real
text - how do I read the decompressed file in spark - I can build a
dataframe reader if someone guides or nudges me in right direction ...