Thanks for the info, Dave. Speed is a very important feature, but there might be some risk choosing the FFmpeg decoder. They've had trouble with their encoder in the past, which tells me it's possible your users might one day run into a valid FLAC that the FFmpeg decoder won't handle correctly.
A better suggestion might be to start with libFLAC, optimize as needed, and then submit the optimizations back to the FLAC project where they will be more widely useful. But that's just my opinion. Brian Willoughby Sound Consulting On Feb 25, 2009, at 03:10, Dave Chapman wrote: I'm a developer with the Rockbox project - http://www.rockbox.org - which is a written-from-scratch operating system and application suite designed for portable audio players. We of course support FLAC, and have a small, well-optimised (for embedded targets, including ARM) decoder which I think would be perfect for the devices Android runs on. It is based on the decoder from ffmpeg, and hence is licensed under the LGPL, with Rockbox specific code licensed under the GPL. I don't know if the GPL will be a problem with this part of Android. If the LGPL is compatible, then I'm sure the relevant Rockbox developers (including myself) would be happy to donate their code under that license. We initially implemented FLAC playback in Rockbox using libFLAC, but achieved significant speed gains (and reduced code size) when switching to the smaller ffmpeg decoder. I'm afraid I don't have exact figures to hand, but can try and dig them out if people are interested. Our current decoder can decode a typical FLAC file using about 13MHz of an arm7tdmi core. On portable (battery-powered) devices, performance is very important. The Rockbox source code can be browsed here: http://svn.rockbox.org/viewvc.cgi/trunk/ See apps/codecs/ for our codecs. If I was going to attempt to implement this, I would definitely go for the ffmpeg decoder, rather than libFLAC, assuming the license is OK. Regards, Dave. _______________________________________________ Flac-dev mailing list Flac-dev@xiph.org http://lists.xiph.org/mailman/listinfo/flac-dev