These changes are in part related to handling playback of mixed clear
and encrypted content, where we might want to use a secure decoder
throughout, but only have drm init data and only care about the state
of the DrmSession during playback of encrypted parts.
- requiresSecureDecoderComponent became unnecessary when we added
ExoMediaCrypto, which provides a layer in which requiresSecureDecoderComponent
can be overridden.
- Relaxed requirements for obtaining the MediaCrypto. It's helpful
to allow retrieval in the error state, since it can be used to
instantiate a decoder and play clear samples.
- Deferred throwing of errors in renderer implementations. As long as
we can get a MediaCrypto, we should init the codec. We can also
play clear samples without failing if playClearSamplesWithoutKeys is
true, regardless of the errors state.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=160536365
