mpc support - any chance to be completed?

[river runs red]

i noticed that there was no further work on the mpc support in the last months. is there still a chance that mpc will be decoded in realtime (i read the cpu may not be fast enough) or does the RB-team think the cpu definitely cant decode mpc in realtime?

if so i wont wait for mpc support and convert my mpc´s to vorbis or mp3.

[DreamTactix291]

I don't see why the CPU wouldn't be fast enough. It's less complex to decode than mp3 really. The problem is that the decoding libraries have lots of 64 bit math in them I believe and the Coldfire CPU can't work with that fast enough. Basically just the decoder needs a lot of optimisation and they are working more on the codecs that work so far.

So I'm confident to say it will happen but not confident to say when it will happen.

[rasher]

Actually, from what I understand, the real problem is that the way the decoder works now requires a lot of data to be held in the fast IRAM, and the IRAM is simply not large enough to hold it all. So the codec needs to be restructured. If this happens, it should decode just fine.

[river runs red]

thanks for your reply, guys.
so i see thats its woth waiting and hoping.

it would be fine if the one who developed the FIRST mpc codec could say some words, because i think a lot of people are waiting for it to be completed...

cu
olli

[rasher]

From the horse's mouth:

22.03.57 #       <preglow> incognito: we more or less need to rewrite the mpc code to make it work fast enough
22.05.48 #       <incognito> so it can be much more optimized i gather?
22.05.56 #       <preglow> oh yes, tons
22.06.01 #       <preglow> but the current code doesnt make it easy
22.06.13 #       <preglow> i just did the easiest optimisations and left it at ...
22.07.59 #       <preglow> but yeah, tons and tons of potential, you just need to find someone skilled in fixed point math and willing to do some work
...
22.09.34 #       <preglow> its really bitter, because musepack is such a simple codec compared to for example vorbis
22.10.14 #       <incognito> very fast decoding also, at least on pc architecture
22.10.40 #       <preglow> yes, it _should_ be fast

[FlameGrilled]

Please, let me explain a simple non-tech concept to the OP

*warns the OP in advance, that nasty malicious flaming is not advisable when it comes to responding to my comments.... hellcats are on read alert*

Before they, the people behind RB, have a priority issue of continuing their MPC support side to the firmware, they have an ever so slightly more pressing matter called... getting their current version (or it's next release) that bit closer to 'release' form .. aka the literal idiot-proof install called V1.00 to use common terms.

Please, let them get the essentials done first (eg further quality control if needed, and basic rounding off of what exists and getting any last high-priority essentials sorted) before you and others start adding to their user-demanded must-do list

It's not like they are under obligation to do ferk all beyond what suits their cause or belief in the project

So be happy to get what's delivered as it's delivered and hope it reaches it's gold state (aka full release v1.0) as soon as it's ready

Is it such a ferking disaster if MPC goes on long term 'back burner' priority..??

They've included WAVPACK support, and as anyone who is familar with that one knows, it supports a lossy and lossless and hybrid encoding method (does WAVPACK) to which i believe is implemented fully for playback/decode in the current release of the f/w RB have to date.

You'd do them lots of favours, and support the use of the formats they have worked hard to implement - shows them the effort wasn't wasted

[river runs red]

well, that wasnt my intention.
i just wanted to know if its worth the wait or if its impossible to get mpc to work.

thanks a lot

[RotAtoR]

Originally Posted by rasher

From the horse's mouth:
...

Thanks for that. I'm glad to hear musepack is at least feasible, even if it requires a large rewrite. I've been holding my breath for a while wondering whether or not I'd eventually be able to use my 20gb mpc collection on my iriver.