Adds offline decryption key and uses it to decrypt content during offline playback
Jira: VEX-5938
https://jira.tenkasu.net/browse/VEX-5938
- Update to accept scheme for key required to play offline playback
- Uses provided scheme to intercept call from player and return the key
- Fixes player item observer removal pattern
### Reviews
- Major reviewer (domain expert): @armadilio3
Latest Xcode 12 fails to build while without a module to depend on React-Core directly hence this change is necessary for native modules on iOS. This change requires to React Native 0.60.2 or newer. For more details please check: facebook/react-native#29633 (comment)
This PR adds support for DRM streams on iOS (Fairplay) and Android (Playready, Widevine, Clearkey)
I am neither Android nor iOS developer, so feel free to provide feedback to improve this PR.
**Test stream for ANDROID:**
```
testStream = {
uri: 'http://profficialsite.origin.mediaservices.windows.net/c51358ea-9a5e-4322-8951-897d640fdfd7/tearsofsteel_4k.ism/manifest(format=mpd-time-csf)',
type: 'mpd',
drm: {
type: DRMType.PLAYREADY,
licenseServer: 'http://test.playready.microsoft.com/service/rightsmanager.asmx?cfg=(persist:false,sl:150)'
}
};
```
or
```
{
uri: 'https://media.axprod.net/TestVectors/v7-MultiDRM-SingleKey/Manifest_1080p.mpd',
drm: {
type: 'widevine', //or DRMType.WIDEVINE
licenseServer: 'https://drm-widevine-licensing.axtest.net/AcquireLicense',
headers: {
'X-AxDRM-Message': 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ2ZXJzaW9uIjoxLCJjb21fa2V5X2lkIjoiYjMzNjRlYjUtNTFmNi00YWUzLThjOTgtMzNjZWQ1ZTMxYzc4IiwibWVzc2FnZSI6eyJ0eXBlIjoiZW50aXRsZW1lbnRfbWVzc2FnZSIsImZpcnN0X3BsYXlfZXhwaXJhdGlvbiI6NjAsInBsYXlyZWFkeSI6eyJyZWFsX3RpbWVfZXhwaXJhdGlvbiI6dHJ1ZX0sImtleXMiOlt7ImlkIjoiOWViNDA1MGQtZTQ0Yi00ODAyLTkzMmUtMjdkNzUwODNlMjY2IiwiZW5jcnlwdGVkX2tleSI6ImxLM09qSExZVzI0Y3Iya3RSNzRmbnc9PSJ9XX19.FAbIiPxX8BHi9RwfzD7Yn-wugU19ghrkBFKsaCPrZmU'
},
}
}
```
**Test stream for iOS:**
Sorry but I can not provide free streams to test. If anyone can provide test streams, or found some we can use, please let me know to also test them.
It has been tested with a private provider and they work, at least with the `getLicense` override method. (An example implementation is provided in the README)