Question about the Dolby Atmos support in 2.6.1

[unext-wendong]

This is one question about the change to support Dolby Atmos in release 2.6.1.
c3b92f8

One of changed places is in file MediaCodecUtil.java when querying for the decoders available for the mime type, audio/eac3-joc is tried first then audio/eac3.

From the change itself and the comment there, it seems to be for decoders which are able to decode Dolby Atmos streams but do not list audio/eac3-joc as their supported mime type (in their configuration file e.g. media_codecs.xml).

I think we are seeing one of those decoders. It works fine with version 2.6.0, but errors out on version 2.6.1 during codec configuration i.e. MediaCodec.configure(MediaFormat format, Surface surface, MediaCrypto crypto, int flags). It throws the IllegalArgumentException exception.

The reason seems to be that the passed in MediaFormat format in this method call contains audio/eac3-joc as the mime type instead of audio/eac3 even though this decoder was queried by using audio/eac3.

Wanted to confirm if it is a miss in this change that it should be using the same mime type to configure the decoder as the one used to query it.

[andrewlewis]

This sounds like a bug. Please could you confirm that changing the MIME type of the format used to configure the codec to audio/eac3 fixes this? Thanks.

[unext-wendong]

Please could you confirm that changing the MIME type of the format used to configure the codec to audio/eac3 fixes this? Thanks.

Yes, with this change the issue is not reproduced.