3efc62b512
These have the same value (`-1`), and basically the same meaning (offset in an array/list/file/byte stream/etc), but 'position' is an overloaded term in a media playback library, and there's a risk people assume that methods like `Player.getCurrentPosition()` may return `C.POSITION_UNSET`, when in fact unset media times (whether duration or position) are always represented by `C.TIME_UNSET` which is a) a `long` (not `int`) and b) a different underlying value. (aside: `getCurrentPosition()` never returns an unset value, but it's a good example of the ambiguity of the word 'position' between 'byte offset' and 'media timestamp'.) PiperOrigin-RevId: 492493102
DataSource module
Provides a DataSource abstraction and a number of concrete implementations for
reading data from different sources. Application code will not normally need to
depend on this module directly.