ibaker c50084e7ba Replace Util.toLowerInvariant() with Ascii.toLowerCase()
Even when fixed to the US locale (and thus avoiding surprising behaviour
in e.g. Turkish locale with "i" and "I") there are unexpected behaviours
when upper and lower casing non-ASCII characters.

For example it's sometimes not symmetric, e.g.:
"ẞ".toLowerCase() -> "ß"
"ß".toUpperCase() -> "SS"

In all the ExoPlayer usages we are either dealing with known-ASCII
strings (e.g. MIME types) or comparing against ASCII constant strings
anyway, so it seems easier to just use Guava's ASCII-only class in these
cases.

This change also includes some null-twiddling, because
Util.toLowerInvariant() is null tolerant, while Ascii.toLowerCase() is
not. Most of the usages were already non-null, and it was easy enough to
change the remaining ones to be so by simple reordering of statements.

I'll make an equivalent change for Util.toUpperInvariant() next.

PiperOrigin-RevId: 368419813
2021-04-15 10:51:48 +01:00
..

ExoPlayer OkHttp extension

The OkHttp extension is an HttpDataSource implementation using Square's OkHttp.

License note

Please note that whilst the code in this repository is licensed under Apache 2.0, using this extension requires depending on OkHttp, which is licensed separately.

Getting the extension

The easiest way to use the extension is to add it as a gradle dependency:

implementation 'com.google.android.exoplayer:extension-okhttp:2.X.X'

where 2.X.X is the version, which must match the version of the ExoPlayer library being used.

Alternatively, you can clone the ExoPlayer repository and depend on the module locally. Instructions for doing this can be found in ExoPlayer's top level README.

Using the extension

ExoPlayer requests data through DataSource instances. These instances are either instantiated and injected from application code, or obtained from instances of DataSource.Factory that are instantiated and injected from application code.

If your application only needs to play http(s) content, using the OkHttp extension is as simple as updating any DataSources and DataSource.Factory instantiations in your application code to use OkHttpDataSource and OkHttpDataSourceFactory respectively. If your application also needs to play non-http(s) content such as local files, use

new DefaultDataSource(
    ...
    new OkHttpDataSource(...) /* baseDataSource argument */);

and

new DefaultDataSourceFactory(
    ...
    new OkHttpDataSourceFactory(...) /* baseDataSourceFactory argument */);

respectively.

  • Javadoc: Classes matching com.google.android.exoplayer2.ext.okhttp.* belong to this module.