Hi,
I'm trying to add an additional Audio Effect to 2.3.3 AOSP.
The native C part of the code seems fairly straightforward. I can link
against the effect's static library, set up the i/o buffers etc. No JNI
layer to write as the effects API provides a standard Java->C mapping and
the ability to pass custom commands through this. The problem is in the Java
layer. It would seem that in the AudioEffects API there is only scope for
instantiating one of the OpenSL-ES compliant subclasses. The type UUID of
your effect would have to be that of one of the OpenSL-ES effects, and its
api would need to map to one of the audioeffects subclasses for that effect.
However... In the Java source (AudioEffect.java) there is a constructor for
AudioEffect itself that lets one specify an arbitrary effect type and uuid
value:
public AudioEffect(UUID type, UUID uuid, int priority, int audioSession)
throws IllegalArgumentException, UnsupportedOperationException,
RuntimeException {}
Great, for testing as we can manually insert the UUIDs I created for the
non-opensl effect.
However in the SDK (i've checked 8, 10, 11) there is no reference to this
constructor at all. Is this intentional, or an oversight?
Assuming this was purposefully left out, is there any way I can call this
function (that does appear to be there, if not in the SDK) using references
to the source, say, rather than the SDK? I'm currently rebuilding the SDK
from source in the hope that the constructor is then visible (as there
doesn't seem to be anything in the source to tag it to be left out), and so
as to add a subclass to the SDK to give an improved API specifically for
this effect, but does anyone else have experience/knowledge with why that
constructor is missing?
Cheers,
Rob
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