Simon Pickering wrote: > > >> I'm currently using GStreamer to play mp3 files. I'm trying >> to move all mp3 decoding to the DSP but I'm unable to find >> any useful info on the matter. > > May I ask why you're trying to move mp3 decoding to the DSP? Are the mp3s > the sound track/effects for a game, etc., so you want to have more CPU > cycles to do useful work? > >
Yes, it's an emulator actually, and mp3 decoding is noticeably stealing CPU cycles. Simon Pickering wrote: > > >> The only thing i got so far is this paragraph from the wiki: >> >> http://wiki.maemo.org/Documentation/Maemo_5_Developer_Guide/Ar > chitecture/Multimedia_Domain#Audio_Codecs >> >> Most of the audio encoders and decoders are wrapped under the >> OpenMAX IL interface [OMAX], which abstracts the codec >> specific implementation (which in general can run on ARM or >> DSP). Unless a different solution is needed (due e.g. to >> sourcing problems, performance requirements or to fulfill >> some specific use cases) all the audio codecs will be running >> on the ARM side to simplify the audio architecture and to >> avoid the additional latency and load over the data path due >> to the routing of the audio data first to DSP and then back to ARM. >> >> So, obviuosly a different solution is needed but I coudn't >> find any documentation whatsoever. :) Anyone can help here? > > Are there any existing OpenMAX mp3 decoders targetted at the TMS320c64x > DSP? > If not, it would probably not be too painful to port one (where pain is > all > relative, but at least this would be less painful than trying on the more > constrained and 8bit-less c55 ;) > > Thats what the wiki article I quoted seems to imply, but it's not very clear and I couldn't find any further info. There's a multimedia framework diagram suggesting that there are OpenMAX audio codecs that run in the DSP via DSP-bridge, but not sure if this applies to maemo 5 and there's no info on how to use them. -- View this message in context: http://n2.nabble.com/GStreamer-mp3-playback-and-the-DSP-tp4881751p4882126.html Sent from the maemo-developers mailing list archive at Nabble.com. _______________________________________________ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
