IcyHttpDataSource (exoplayer2-ext-icy 1.0.0 API)

```
public final class IcyHttpDataSource
extends DefaultHttpDataSource
```
https://cast.readme.io/v1.0/docs/icy http://www.smackfu.com/stuff/programming/shoutcast.html

Nested Classes
Modifier and Type	Class and Description
`static class`	`IcyHttpDataSource.Builder`
`class`	`IcyHttpDataSource.IcyHeaders` Container for Icy headers such as stream genre or name.
`static interface`	`IcyHttpDataSource.IcyHeadersListener`
`class`	`IcyHttpDataSource.IcyMetadata` Container for stream title and URL.
`static interface`	`IcyHttpDataSource.IcyMetadataListener`

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`long`	`open(DataSpec dataSpec)`
`int`	`read(byte[] buffer, int offset, int readLength)`

public long open(DataSpec dataSpec)
          throws HttpDataSourceException

public int read(byte[] buffer,
                int offset,
                int readLength)
         throws HttpDataSourceException

Class IcyHttpDataSource