search for: spx_word64_t

hi, I am currently trying out speex version of 1.1.6 FIXED_POINT. noticed there's a 64 bit integer being used in the long term prediction. any chance of using a 32 bit integer without incurring some major side-effects? cheers, tk

hi, jean-marc: am interested in just integer implementation. is the 64 bit used more for possibility of large values rather than accuracy? could give me a rough idea of the range, typical value and the extremes off-hand? i take it your workaround involves some complex manipulations instead of just using the 32bit to represent the more significant bits of 64-bit integer. if yes, could you

On Tue, 2005-01-11 at 02:07 -0500, Jean-Marc Valin wrote: > > noticed there's a 64 bit integer being used in the long term prediction. > > any chance of using a 32 bit integer without incurring some major side-effects? > > A 32-bit integer may overflow (which is why I used a 64-bit int). Of > course, it's possible to emulate it using 32-bit arithmetic. Otherwise, >

Actually, the best thing do to would be to use __int64 *unless* it's not supported. So there needs to be a configure check... Jean-Marc Le mar 01/06/2004 à 14:50, Kenji Chan a écrit : > I emailed Jean-Marc the arch.h about one week ago, not quite sure > whether he actually received that email. > > > > Anyway, here I have an improved version of arch.h that I

...f FIXED_POINT typedef signed short spx_word16_t; typedef signed int spx_word32_t; /*long long is not recognized by eMbedded Visual C++ compiler; so use MS's __int64 instead of long long, if compiling on that compiler */ #if defined(_WIN32_WCE) && defined(_MSC_VER) typedef __int64 spx_word64_t; #else typedef long long spx_word64_t; #endif typedef spx_word32_t spx_mem_t; typedef spx_word16_t spx_coef_t; typedef spx_word16_t spx_lsp_t; typedef spx_word32_t spx_sig_t; #define LPC_SCALING 8192 #define SIG_SCALING 16384 #define LSP_SCALING 8192. #define GAMMA_SCALING 32768. #define GAI...

...Windows CE platform 2. _MSC_VER, meaning ms's compiler // the code in arch.h /*long long is not recognized by eMbedded Visual C++ compiler; so use MS's __int64 instead of long long, if compiling on that compiler */ #if defined(_WIN32_WCE) && defined(_MSC_VER) typedef __int64 spx_word64_t; #else typedef long long spx_word64_t; #endif <p>------------------------------------ Chan Kei Yuen (Kenji) <p>> Actually, the best thing do to would be to use __int64 > *unless* it's not supported. So there needs to be a configure check... > > Jean-Marc >...

...tes. If I haven't done so after a few weeks, please send it again. I'm in the process of relocating to Australia, so everything's a bit of a mess around here. Also, please post the c5X-specific files to the list (.cmd, .pjt, ...) so they'll be archived. Last thing, I see you defined spx_word64_t as long long for the C5X, isn't there a way to tell the compiler that the 40-bit accumulator is fine? Jean-Marc Le jeudi 18 ao?t 2005 ? 16:18 -0400, Jim Crichton a ?crit : > Jean-Marc, > > I have attached a small patch with modifications to arch.h, bits.c, and > misc.c. This c...

Hi Jean-Marc, Based on the wonderful Speex project, I've created SpeexOutLoud, essentially a Speex codec port for Windows Mobile 2003 devices. I've included a sample project intended to show the usage of SpeexOutLoud codec in a Pocket PC application based on .NET Compact Framework. I'd request you to please go through the attached build, and include it as a contribution to the

...so two specific things I would watch. First, there is at least one CPU-intensive place (inner_prod) where I have to use many shifts in a loop to prevent overflows, but those could be replaced by a single shift at the end when using a 40-bit accumulator (which can also replace the only use I have of spx_word64_t). The second thing is in the filters (*_mem2() functions). The reference implementation assumes that writes are as fast as reads. This is often not true on DSPs (at least on Blackfin), so it is possible to re-write the algorithm to take that into account. There is an example (in C) for filter_mem2(...

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Hi, I can see that there has been some effort to compile the SPEEX codec to operate on the TI c54x and c55x DSPs and I am wondering if anyone would be able to update the mailing list with their current MIPs and Memory resource requirements for their c54x and/or c55x compilation? The only estimate I was able to find in the mailing list archive was 42MIPs but I'm not sure if this is an

...es > not support any 64-bit integer types. For the moment I am using > "double" which maps to a 32-bit floating point on the C54x and C55x. > The C55x compiler does support "long long". > > Question 1: Is there anything wrong with using a 32-bit float for > spx_word64_t (other than MIPs)? This type is used only in two places > in ltp.c. No problem replacing with a float. The reason for the 64 bits is not the precision but only the range. A 40-bit accumulator would work too. Eventually, this could probably made to fit in a 32-bit int, but I haven't done th...

...return NULL; st->stack = ((char*)st) + sizeof(EncState); #endif Note that I also moved the "if (!st)" check to before st-stack is set, since a write to a bad location would occur otherwise. >> Question 1: Is there anything wrong with using a 32-bit float for >> spx_word64_t (other than MIPs)? This type is used only in two places >> in ltp.c. > > No problem replacing with a float. The reason for the 64 bits is not the > precision but only the range. A 40-bit accumulator would work too. > Eventually, this could probably made to fit in a 32-bit int, bu...

...EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef ARCH_H #define ARCH_H #include "speex/speex_types.h" #define ABS(x) ((x) < 0 ? (-(x)) : (x)) #ifdef FIXED_POINT typedef spx_int16_t spx_word16_t; typedef spx_int32_t spx_word32_t; #ifdef _MSC_VER typedef __int64 spx_word64_t; #else typedef long long spx_word64_t; #endif typedef spx_word32_t spx_mem_t; typedef spx_word16_t spx_coef_t; typedef spx_word16_t spx_lsp_t; typedef spx_word32_t spx_sig_t; #define LPC_SCALING 8192 #define SIG_SCALING 16384 #define LSP_SCALING 8192. #define GAMMA_SCALING 32768. #define GAI...