Bug 1900626 Comment 11 Edit History

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There are two ways to support ClearKey on Android:
1. use Android system ClearKey plugin like what we did for Widevine L3 support.
2. enable Gecko ClearKey CDM like desktop platforms do.

Bug 1267141 comment 13 pointed out some cons of 1. and I think some are already out of date now. However, the latest Android ClearKey plugin still support only `cenc` scheme but not `cbcs`, so it still doesn't work as well as Gecko ClearKey CDM. Chrome for Android doesn't use Android implementation either.
There are two ways to support ClearKey on Android:
1. use Android system ClearKey plugin like what we did for Widevine L3 support.
2. enable Gecko ClearKey CDM like desktop platforms do.

Bug 1267141 comment 13 pointed out some cons of 1. and I think some are already out of date now. However, the latest Android ClearKey plugin still support only `cenc` scheme but not `cbcs`, so it still doesn't work as well as Gecko ClearKey CDM. Chrome doesn't use Android implementation either.

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