--- ??? <[EMAIL PROTECTED]> wrote: > > From: [EMAIL PROTECTED] > > > > --- ??? <[EMAIL PROTECTED]> wrote: > > > But, iAudio M3, portable hardware could not play level 3~8 > although > > > LPC > > > use integer. > > > I guess that Rio Kama(?) has more powerful CPU & a few > > sound effects. > > > And M3 supports many additional sound effect (BBE, mach3bass, 3D > > > Enhancer, MP Enhancer, Equalizer...) > > > These effects occupy CPU pretty much. > > > If you have the more optimized codes, plz give me it. > > > > hmm... libFLAC is the fastest decoder. there are only assembly > > optimizations currently for x86 and PPC. so the M3 must be > > using only the C routines (unless it uses it's own custom > > FLAC decoder?). > > but there is significant room for improvement over plain C by > > just optimizing a few functions. what kind of CPU does the > > M3 use? > > M3 use Motorola Coldfire MCF5249 processor. > I use your reference source code. As I know, > FLAC__bitbuffer_read_rice_signed_block() function has most > proccessing > time.
even when decoding files compressed with LPC? I would expect FLAC__lpc_restore_signal() to take a good chunk. it is also a prime candidate for optimization since it is mostly a simple multiply-accumulate loop and might benefit from the MCF5249's eMAC unit. I think the gnu assembler (gas) even supports coldfire as a target, so if you were to write an assembly version of FLAC__lpc_restore_signal() and donate it to the FLAC project it could go in the official sources which we would maintain. > > > > > And, here is official site. > > > http://www.jetaudio.com/products/iaudio/m3/ > > > > I see. will it eventually list FLAC as a supported format, > > at least in the features section? > > a few days ago, the firmware(1.30b2) for open beta test was released. > if it goes well, flac format will be mentioned in a few days. OK, please let me know when it's ready. thanks, Josh __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------------------------------------- This SF.Net email is sponsored by: YOU BE THE JUDGE. Be one of 170 Project Admins to receive an Apple iPod Mini FREE for your judgement on who ports your project to Linux PPC the best. Sponsored by IBM. Deadline: Sept. 24. Go here: http://sf.net/ppc_contest.php _______________________________________________ Flac-dev mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/flac-dev
