add support for SAMPLE-AES decryption

[erankor]

Description of the Changes

Add support for decryption of SAMPLE-AES for AVC and AAC codecs

CheckLists

• [V] changes have been done against master branch, and PR does not conflict
• [V] no commits have been done in dist folder (we will take care of updating it)
• new unit / functional tests have been added (whenever applicable)
• [V] Travis tests are passing (or test results are not worse than on master branch :))
• [V] API or design changes are documented in API.md

[mangui]

awesome @erankor !
do you have test streams in hands ?

[erankor]

I'm generating streams with our packager (https://github.com/kaltura/nginx-vod-module/) here's a sample URL: http://lbd.kaltura.com:8001/local/ehls/content/bbb.mp4/index.m3u8
(it's on a dev server, so may go down at some point, but for now it's there)

[mangui]

FYI I mirrored your stream on http://streambox.fr/playlists/sample_aes/index.m3u8
could you add it in streams.json so that AES sample decryption could be automatically checked on every commit ?

[mangui]

it works great, however the debug logs are a bit too verbose as we got a debug logs for each audio/video samples.

IMHO it should be a once-off log.
it would be great to find a way to switch it to a once-off log.

[erankor]

@mangui

1. added the stream to streams.json
2. added a logEnabled boolean on Decrypter to reduce the amount of logging - it will print 1-3 lines per segment, I believe that's how it was before these changes (3 lines are printed in case of fallback from WebCrypto to JS)
3. resolved conflicts following latest updates to master

Thanks!

[mangui]

perfect, as you can see I just merged and added dailymotion@9ae9b4a that should fix tests failing on Travis/Saucelabs

[mangui]

🍾 https://travis-ci.org/dailymotion/hls.js/builds/204524086 🍾

[erankor]

Thank you !