The Docs for the SndStreamCreateExtended mention many sound format types including ADPCM and mp3. However, the docs say only the sndFormatPCM type is support is OS5. Is it up to each manufacturer to implement the additional types or did/will these new types show up in future release of garnet/cobalt?
So far, the only compression supported across the board is ADPCM. This API was provided as a standard way for a device manufacturer to add in hooks for codecs they support, either with standard libraries or hardware assist. However, it hasn't been used by any of our licensees on any released devices, as far as I know, with the possible exception of the PalmOne Zire 72 -- that device has several codecs on it, but I didn't get a clear answer from the PalmOne documentation. The sample in the PalmOne SDK 3.0 only use sndFormatIMA_ADPCM as a format argument for SndStreamCreateExtended. Their MiniMP3 example uses the PalmOne-specific CodecMgr APIs.
-- Ben Combee, DTS technical lead, PalmSource, Inc. Read "Combee on Palm OS" at http://palmos.combee.net/
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