- Move parsing onto a background thread. This is analogous
to how frame decoding is pushed to MediaCodec, and should
prevent possible jank when new subtitle samples are parsed.
This is more important for out-of-band subtitles, which can
take a second or two to parse fully.
- Add Useful DataSpec method.
This API wasn't particularly nice. Best to remove it whilst
hopefully no-one is using it. Leaving the ReadHead abstraction
in place, since it might well prove useful in the future.
- cache ref didn't work because it referred to a private variable
(which isn't documented) from a public interface definition
(which is). Meaning the Javadoc generator was trying to link
to documentation that didn't exist.
- Add constants class. Currently housing a single lonely variable,
which is used generally throughout the library, and so no longer
nicely fits into a specific class.
- Rename a few other constants to add clear units.
- Made minor tweak to ExoPlayer documentation.
- Add support for parsing avc3 boxes.
- Make workaround for signed sample offsets in trun files always enabled.
- Generalize remaining workaround into a flag, to make it easy to add additional workarounds going forward without changing the API.
- Fix DataSourceStream bug where read wouldn't return -1 having fully read segment whose spec length was unbounded.
1. Fix SimpleCache startReadWrite asymmetry. Allow more concurrency.
- startReadWrite does not have the concept of a read lock. Once
a cached span is returned, the caller can do whatever it likes
for as long as it wants to. This allows a read to be performed
in parallel with a write that starts after it.
- If there's an ongoing write, startReadWrite will block even if
the return operation will be a read. So there's a weird asymmetry
where reads can happen in parallel with writes, but only if the
reads were started first.
- This CL removes the asymmetry, by allowing a read to start even
if the write lock is held.
- Note that the reader needs to be prepared for the thing it's
reading to disappear, but this was already the case, and will
always be the case since the reader will need to handle disk
read failures anyway.
2. Add isCached method.
