Currently it's possible to copy a master playlist with a URL
that was never present in the original. This change prevents
this, and also moves the key more in line with DASH/SS.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=195065286
ProgressiveDownloader never implemented this properly, and we
don't use it in DownloadManager/DownloadService, both of which
use a polling model. A polling model is also what's used elsewhere,
for example to query the current playback position.
This is effectively doing the TODO in ProgressiveDownloader.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=194214579
Some of the events are emitted by the media periods itself and their index may
not be available in the publicly accessible timeline yet.
To prevent this, we currently check for timeline.isEmpty() only. But this may
also happen for dynamic changes, e.g. when new sources are added in fast
succession and a manifest for one of the new sources starts loading before the
updated timeline is reported.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=194057401
This makes DownloadService easier to use in general and when only single
notification is used for all downloads.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=193165982