similar to: BARK implementation (or specification) error

Hi All, I need some clarifications regarding the mismatch I found in the code and the specification. (a) In the specification, the bark(x) equation is given as: bark(x) = 13.1 atan(.00074x) + 2.24 atan(.0000000158(x^2)) + .0001x whereas in the code it is given as: #define toBARK(n) (13.1f*atan(.00074f*(n))+2.24f*atan((n)*(n)*1.85e-8f)+1e-4f*(n)) Which one of these is the proper one ? (b)

Could someone point me to the BARK/MEL tables that these macros (from vorbis/scales.h) are trying to approximate? #define toBARK(f) (13.1*atan(.00074*(f))+2.24*atan((f)*(f)*1.85e-8)+1e-4*(f)) #define fromBARK(z) (102.*(z)-2.*pow(z,2.)+.4*pow(z,3)+pow(1.46,z)-1.) #define toMEL(f) (log(1.+(f)*.001)*1442.695) #define fromMEL(m) (1000.*exp((m)/1442.695)-1000.) I was wondering if I could come

I have a small feature request for oggenc: Can a command line option be added to allow the user to set the first serial number to be used for the output ogg stream? This only takes a few lines of code, actually. Rationale: it is quite helpful for debugging other encoders. If oggenc is the "reference" encoder, ensuring that your new whiz-bang encoder has diffable output to oggenc is a

On Mon, Apr 04, 2016 at 09:49:24AM -0700, Reid Kleckner via llvm-dev wrote: > An optional MPFR dependency would also be pretty painful. I expect it will > frequently be missing and will not be exercised by most buildbots. IMO if constant folding of transcendental functions makes a significant difference for your program, you likely are doing something strange already. I don't think it

Thanks Jean-Marc, >What you want is simply to override some of the functions in misc.c. I >made it easy to do by wrapping malloc() a speex_alloc() call. Aside from >what's in misc.c, the only other thing I use are some of the math >functions like cos(). That makes sense. But how does the DLL version, which is not linked to the C runtime, get access to C's transcendental

The following has been committed to the Vorbis I spec as of r19445: Errata 20150226: Single entry codebooks A ?single-entry codebook? is a codebook with one active codeword entry. A single-entry codebook may be either a fully populated codebook with only one declared entry, or a sparse codebook with only one entry marked used. The Vorbis I spec provides no means to specify a codeword length of

> It might be clearer, instead of using 'libm', to use something like 'trans' (for transcendental functions). That does seem clearer. ‘trans’ is definitely good with me. -Warren From: Hal Finkel [mailto:hfinkel at anl.gov] Sent: Tuesday, October 3, 2017 5:13 PM To: Ristow, Warren; Bruce Hoult Cc: llvm-dev at lists.llvm.org Subject: Re: [llvm-dev] Trouble when suppressing a

Hi Joerg, > IMO if constant folding of transcendental functions makes a significant difference for your program, you likely are doing something strange already. Alas it's not as simple as that. Currently, if you declare: std::uniform_real_distribution<float> x; LLVM emits two calls to logl() with constant arguments, a fdiv and a fptoui. Libc++'s implementation is consumed and

Hi there ! I'm kinda "yet another guy who tries to implement a vorbis decoder from scratch only by using the vorbis spec". (pure Java, OO-style) (I downloaded the long-awaited-all-in-one-PDF) The data structures are quite ready, I can successfully load the codec setup packet and all its components it's containing. <p><p>So far so good.... Here's my first note

Hi, Am trying to run beta4 encoder on a Sun machine. Want to compare floor0 and floor1. Do not have autoconf and automake. Got the encoder to compile with a simple makefile. The only define i am using is NO_FLOAT_MATH_LIB. The encoded file when played(winamp) gives out plain noise. Am i missing any other flags/defs? -Cathy <p>--------------------------------- Do you Yahoo!? Yahoo!

Hi, If you're interested, include/bits/random.tcc:3312 (std::generate_canonical()). I wish I could just point people at libc++, but that's outside of my control. As for fixing the library, that horse bolted some time ago. Cheers, James On Mon, 4 Apr 2016 at 18:50 Stephen Canon <scanon at apple.com> wrote: > That sounds like a library issue that qualifies as “somewhat

First let me say that I really like the notion of being able to plug in .bc libraries into the compiler and I think that there are many potential uses (i.e. vector saturation operations and the like). But even so it is important to realize the limitations of this approach. Generally implementations of transcendental functions require platform specific optimizations to get the best performance and

Hi According to vorbis I spec, there are several configurations. There are 2 formats of floor, 3 formats of residue and 3 look up types of VQ codebook, etc. I think to get all kinds of vorbis file with these configurations but what I have got from network only support some of the formats (Ex. floor1, residue 1 & 2, VQ lookup type0 & 1). I downloaded several freeware vorbis encoder

Hi Guys, I want to compile libvorbis, but I get this error message if I made a make. I use Sun Solaris 9 on a UltraSPARC Server and gcc 3.3 can anyone help me, please? <p>Best Thanks Daniel Here the message output from compiling. ----------------------------------------- /usr/ccs/bin/ld -G -z defs -h libvorbis.so.0 -o .libs/libvorbis.so.0.3.0 mdct.lo smallft.lo block.lo envelope.lo

Hi all. In fact, this is how we have implemented it in our compiler (intel's OpenCL). We have created a .bc file for every architecture. Each file contains all the SIMD versions for the functions to be vectorized. To cope with the massive amount of code to be produced, we implemented a dedicated tblgen BE for that purpose. We are willing to share that code with the llvm community, in case this

Hi All, I am planning to implement Ogg Vorbis Decoder on a 24 bit DSP. I have following doubts: 1) What is min and max bitrate? 2)What is max Audio Packet size ? 3)What is the max size of setup header? 4)Any idea how to start for making a 24Bit fixed point reference code? Shall I start with floating point or Tremor or Tremor Low Mem Version? 5) What window sizes in Ogg Vorbis are normally

----- Original Message ----- > From: "Elior Malul" <elior.malul at intel.com> > To: "Michael Gottesman" <mgottesman at apple.com>, "Hal Finkel" <hfinkel at anl.gov> > Cc: "LLVM Developers Mailing List" <llvmdev at cs.uiuc.edu> > Sent: Thursday, February 14, 2013 8:33:42 AM > Subject: RE: [LLVMdev] SIMD

>>> I'd like to emphasise in the latter one: "This option also relaxes the precision of >>> commonly used math functions." >> >> Isn't this the "libm" flag that is proposed in this thread? > > I don't know. I didn't see any definition of it. > > In my case I'm talking about allowing the use of lower precision but

Hi, Clang is currently unable to constant fold calls to math.h functions such as logl(), expl() etc. The problem is that APFloat doesn't have these functions, so Clang is forced to rely on the host math library. Because long double isn't portable, we only ever query the host math library for double or float results. I can see three methods for allowing constant folding for types that

Dear all, I try to plot a logstic regression model as follows: Valkror<- read.table("Valkror.txt", header=T) np.bark<- glm(Npinc~bark, family=binomial, data=Valkror) plot.formula(np.bark$fitted.values~ Valkror$bark) The above looks nice but I want to connect the points with a line so I try: plot.formula(np.bark$fitted.values~ Valkror$bark, type="b") but it gives a