similar to: Vorbis optimizations...

Hi all, The decoder is down 30% execution time, identical bit output. Didn't get the mdct yet; 1024 point mdct is a bit much to brute-force, and I'm not going to hand-unroll the whole thing either (the machine- unrolled version produced a 1.5M executable; understandably, it wasn't very fast. Still waiting for processors with 1.5M L1 code caches ;-) Slowest parts now are: -- mdct --

I saw some mail go by a bit ago about doubles-vs-floats, but I seem to have lost it. I'm interested in rewriting the mdct code using Altivec on MacOS X. Altivec doesn't support doubles, though -- the only floating point vector type is single precision floats. Vorbis currently has doubles everywhere -- is this really necessary? Doubles are supposedly faster than floats in the PPC

>>The game companies are interested in >>Vorbis, and this is a good thing :) I am a lead programmer at a major game company (Maxis) and Vorbis is potentially very important to us. I am pushing to make it the default streaming sound format (e.g. non-sound effects) for all future titles. This assumes that it works as well as anticipated. Other subdivisions of Electronic Arts are

We spent a little time here taking a look at the Vorbis licensing scheme and ran into some possible issues. In particular, the Vorbis FAQ page here says that the LGPL license applies to Vorbis libraries and GPL applies to source code (at least that's what I gather). http://www.vorbis.com/faq.html#flic http://www.fsf.org/copyleft/lesser.html Reading the text of these Gnu

>>You shouldn't do that. Converting mp3 to >>vorbis can ONLY decrease the quality. No doubt the people who want to do this have the sound file in no other usable format. They have no choice. Since MP3 has legal issues, they may very well stand to benefit from such a conversion when there are no alternatives. No need to criticize them for being in this predicament.

> From: "JD Conley" <jdc@malibuboats.com> > To: "'vorbis@xiph.org'" <vorbis@xiph.org> > Subject: RE: [vorbis] new MS codecs > Date: Thu, 14 Dec 2000 10:49:58 -0800 > X-Mailer: Internet Mail Service (5.5.2653.19) > Reply-To: vorbis@xiph.org > > Oh yeah, they have some samples on their site. Interestingly enough, they > don't

Hi! TL;DR WDYT of adding zlib decompression capabilities to LLVMObject library? ld.gold from GNU binutils has --compress-debug-sections=zlib option, which uses zlib to compress .debug_xxx sections and renames them to .zdebug_xxx. binutils (and GDB) support this properly, while LLVM command line tools don't: $ ld --version GNU gold (GNU Binutils for Ubuntu 2.22) 1.11 $ ./bin/clang++ -g a.cc

On Tue, Apr 16, 2013 at 8:31 PM, Michael Spencer <bigcheesegs at gmail.com>wrote: > On Tue, Apr 16, 2013 at 2:37 AM, Alexey Samsonov <samsonov at google.com>wrote: > >> Hi! >> >> TL;DR WDYT of adding zlib decompression capabilities to LLVMObject >> library? >> > >> ld.gold from GNU binutils has --compress-debug-sections=zlib option,

On Tue, Apr 16, 2013 at 2:37 AM, Alexey Samsonov <samsonov at google.com>wrote: > Hi! > > TL;DR WDYT of adding zlib decompression capabilities to LLVMObject library? > > ld.gold from GNU binutils has --compress-debug-sections=zlib option, > which uses zlib to compress .debug_xxx sections and renames them to > .zdebug_xxx. > binutils (and GDB) support this properly,

On Tue, Apr 16, 2013 at 9:37 AM, Alexey Samsonov <samsonov at google.com> wrote: > > On Tue, Apr 16, 2013 at 8:31 PM, Michael Spencer <bigcheesegs at gmail.com> > wrote: >> >> On Tue, Apr 16, 2013 at 2:37 AM, Alexey Samsonov <samsonov at google.com> >> wrote: >>> >>> Hi! >>> >>> TL;DR WDYT of adding zlib decompression

Just in case - do we want to link with libz.so installed in the system, or be self-contained and copy sources to LLVM repo? On Tue, Apr 16, 2013 at 10:48 PM, Eric Christopher <echristo at gmail.com>wrote: > On Tue, Apr 16, 2013 at 9:37 AM, Alexey Samsonov <samsonov at google.com> > wrote: > > > > On Tue, Apr 16, 2013 at 8:31 PM, Michael Spencer <bigcheesegs at

At 17:51 21/06/00 +0200, Friedrich Leisch wrote: > >OK, we're statisticians so let's use some real data and not only >guestimates ... in > > http://www.ci.tuwien.ac.at/~leisch/cran-http.report/ > >you find some usage statistics about the CRAN *master* site (with all >traffic inside our domain removed). Beware that not every hit is a >potential user as search

Hi.. Well i too am having the same memdisk decompression error that states "ran out of input data" since the first when memdisk started supporting booting compressed images !!! I posted this several times but alwsys cudlnt understand whatthe admins want (like what inof they need to debug the problem)... I even offered to send screenshots of the screen but it was refused !!! The

On 25/11/14 22:05, Andy Ritger wrote: > On Tue, Nov 25, 2014 at 10:57:44AM -0500, Ilia Mirkin wrote: >> On Mon, Nov 24, 2014 at 8:33 PM, Andy Ritger <aritger at nvidia.com> wrote: >>> On Fri, Nov 21, 2014 at 01:39:55AM -0500, Ilia Mirkin wrote: >>>> On Fri, Nov 21, 2014 at 1:16 AM, Andy Ritger <aritger at nvidia.com> wrote: >>>>> Hi Ilia,

Hi` I just subscribed to the list and already have a couple of questions ;) I read the FAQ and skimmed through the archives but I'd rather get up- to date information and not rely on what I read in old posts. Are there any games/ mods using Ogg Vorbis? Are there any other tools despite standalone music players using Ogg Vorbis? How fast is decompression? How big is the memory overhead for

On Mon, Nov 24, 2014 at 8:33 PM, Andy Ritger <aritger at nvidia.com> wrote: > On Fri, Nov 21, 2014 at 01:39:55AM -0500, Ilia Mirkin wrote: >> On Fri, Nov 21, 2014 at 1:16 AM, Andy Ritger <aritger at nvidia.com> wrote: >> > Hi Ilia, >> > >> > Actually 0x90b8 is different than copy engine. I'm not very familiar >> > with it, but 0x90b8 is

Hello. My friend's data compressor has a problem. During decompression stage, on some corrupted files, it may issue an overlapping memcpy. He has two easy solutions for that: * switch to memmove * add a branch to detect such case However, he's not happy with either of them as they slow the decompression down to handle a case that will never happen to almost everyone. Furthermore, we

> On Wed, 2020-03-25 at 14:39 +0000, Leroy Tennison wrote: >> Since you state that using -z is almost always a bad idea, could you >> provide the rationale for that? I must be missing something. >> > I think the "rationale" is that at some point the > compression/decompression takes longer than the time reduction from > sending a compressed file. It

There has been some talk about a zlib security problem that could let someone overflow the buffers in the zlib decompression code, potentially allowing someone to craft an exploit to execute arbitrary code. Since this is a decompression bug, this can only affect an rsync daemon if it allows uploads with the --compress option enabled. If you run a daemon that allows uploads, you may wish to add

There has been some talk about a zlib security problem that could let someone overflow the buffers in the zlib decompression code, potentially allowing someone to craft an exploit to execute arbitrary code. Since this is a decompression bug, this can only affect an rsync daemon if it allows uploads with the --compress option enabled. If you run a daemon that allows uploads, you may wish to add