Displaying 20 results from an estimated 200 matches similar to: "how to study the speex source code"
2005 Oct 24
2
(small) bug in nb_decode?
Hi,
So I got a crash on the following code:
k1=SUBMODE(lpc_enh_k1);
k2=SUBMODE(lpc_enh_k2);
which in the newer codebase is:
bw_lpc(SUBMODE(lpc_enh_k1), st->interp_qlpc, awk1, st->lpcSize);
bw_lpc(SUBMODE(lpc_enh_k2), st->interp_qlpc, awk2, st->lpcSize);
I am not sure if the newer code will have the same issue but the
following check is
2005 May 25
3
Speex on TI C6x, Problem with TI C5x Patch
Hi Jean-Marc, Hi Jim,
I have also seen some problems with the 1.1.8 release on the C55x. So far I
have boiled down the issues to the following:
1) We need our own "fixed_xx.h" header file. I don't know why, and haven't
had time to investigate, but there is a definite improvement when I use the
attached fixed_c55x.h file which has turned all the maths into inline
functions.
2006 Feb 25
2
gcc-4.1: svn 10958 fix point build fails
Building svn 10958 on amd64, gcc-4.1:
gcc -DHAVE_CONFIG_H -I. -I. -I.. -I../include -I../include -I..
-I/usr/include -O2 -fPIC -funswitch-loops -fvisibility-inlines-hidden
-march=k8 -ftree-vectorize -pipe -mfpmath=sse -O3 -msse -MT filters.lo
-MD -MP -MF .deps/filters.Tpo -c filters.c -fPIC -DPIC -o
.libs/filters.o
cc1: warning: command line option "-fvisibility-inlines-hidden" is
2006 Mar 01
0
gcc-4.1: svn 10958 fix point build fails
I'm not sure what you're trying to achieve here, but SSE and fixed-point
are mutually exclusive.
Jean-Marc
On Sat, 2006-02-25 at 19:02 -0500, sean darcy wrote:
> Building svn 10958 on amd64, gcc-4.1:
>
> gcc -DHAVE_CONFIG_H -I. -I. -I.. -I../include -I../include -I..
> -I/usr/include -O2 -fPIC -funswitch-loops -fvisibility-inlines-hidden
> -march=k8 -ftree-vectorize
2006 Jan 18
2
TI 6xxx platform performance
I'm trying to make a design decision between a TI 6416 or DM642 (fixed
point) and 6713 (floating point) platform. The application is a 32 channel
speech encoder. (CBR only, 8khz, 8kbps)
To get a feel for the computational load, I am running 1 second (50 frames)
of voice through the encoder.
My profile of the 6416 indicates I'm at 27.4M cycles/channel. I need to get
below 720Mhz/32
2006 Jan 18
2
Errors in speex lib with Blackfin
Hello!
I'v downloaded speex lib 1.1.11.1.
I am trying to port speex lib to Blackfin processor.
I am using VisualDSP++ 4.0.
If I am compiling source codes with using floating point everything
ok.
When I am compiling with FIXED_POINT defined everything's ok and code
works about two times faster.
But when I am defining BFIN_ASM I am getting several compiling errors
in Blackfin assembler
2009 Apr 24
2
[PATCH] Blackfin: cleanup astat/cc/hardware loop asm clobbers
Most asm statements clobber ASTAT bits (shifts, maxes, etc...) but do
declare the register as clobbered. Same thing with CC in a few places.
Some places make an attempt at clobbering some hardware loop registers,
but it's very incomplete compared with how many asm statements actually
use hardware loops.
Signed-off-by: Mike Frysinger <vapier at gentoo.org>
---
libspeex/bfin.h
2007 Aug 06
2
Attempting to shrink speex: Are these functions necessary?
Hi,
I am using speex 1.2beta2 on a narrowband 16-bit, 8khz system that has
a severe program space problem and will not fit speex in its normal
operation. In an attempt to shrink speex I placed a breakpoint in every
function and ran a decode and encode and removed the breakpoints that I
hit. in the functions that had a breakpoint that I didn't hit I
commented out those functions (as well as
2004 Aug 06
4
Speex test cases?
I'm trying to get speex to encode a bit faster, mainly by rewriting a few
functions in SSE and translating the GCC __asm__ to VC __asm.
There's 2 functions I'm targeting, first is vq_nbest which consumes 40% of
the time at high complexity and split_cb_search_shape_sign. Which consumes
just over 30%. I've split out two functions from:
cb_search_precompute_energy - loop at the
2007 Aug 07
1
Attempting to shrink speex: Are these functions necessary?
for the bits init I am using speex_bits_set_bit_buffer and I don't use
the write to or read from because the data is already in the buffer I am
reading from and I am writing to the final buffer so I don't need to
move arrays around.
what part is the vocoder part of the decode?
Thanks for your help!
-Mike
>>> Jean-Marc Valin <jean-marc.valin@usherbrooke.ca> 08/06/07
2007 Aug 07
1
Attempting to shrink speex: Are these functions necessary?
I'm glad to hear that my data size can be shrunk considerably, however I do not know the minimum values that I would set the static arrays to be. I hate to be a bother but could you tell me the minimum values for these arrays/structures in the state structure? Thanks!
encode:
stack
winBuf
excBuf
swBuf
lagWindow
old_lsp
old_qlsp
mem_sp
mem_sw
mem_sw_whole
mem_exc
mem_exc2
pi_gain
pitch
2004 Aug 06
2
SmartPhone ARM
>What frequency is the ARM processor?
The phone shows ARM720 no freq.
I'm going to have to guess around 100 Mhz.
I ran the same code on an XSCALE ARM 400 mhz. Toshiba e740.
Runs about .33 -> .4x realtime. This is the using the generic fixed point
defines.
Around 5 times faster than I am seeing with the Orange SPV e100.
I am using the 1.1.3 codebase.
Thanks for taking the time to
2007 Aug 07
0
Attempting to shrink speex: Are these functions necessary?
Thank you, I really appreciate the help.
-Mike
>>> Jean-Marc Valin <jean-marc.valin@usherbrooke.ca> 08/07/07 8:34 AM >>>
Michael Jacobson a ?crit :
> I'm glad to hear that my data size can be shrunk considerably,
> however I do not know the minimum values that I would set the static
> arrays to be. I hate to be a bother but could you tell me the
>
2004 Aug 06
1
Real time audio encoding - cpu usage
Hello Jean-Marc
>If you want to do it, I can show you
>what functions (there are 2-3) to port. Otherwise I might do it
>eventually, but it's not a top priority (there's already an SSE version
>though).
I would indeed like to know which functions can be used to improve K6-2
performance through 3DNow.
Cheers
Bjoern D. Rasmussen
<p><p><p>>From: Jean-Marc
2004 Aug 06
0
[PATCH] Make SSE Run Time option. Add Win32 SSE code
> There is a big difference between SSE and SSEFP. The SSEFP means
> that the CPU supports the xmm registers. All Intel chips with SSE support
> do, however no current 32 bit AMD chips support the XMM registers. They
> will support the SSE instructions but not those registers. You are right
> about the SSE2 not being used.
I'm still not sure I get it. On an Athlon
2004 Aug 06
3
[PATCH] Make SSE Run Time option.
Le jeu 15/01/2004 à 15:30, Daniel Vogel a écrit :
> Unrelated, but please use SSE/MMX/... intrinsics on Windows instead of using
> inline assembly so you also get the speed benefit on Win64.
OK, so here's a first start. I've translated to intrinsics the asm I
sent 1-2 days ago. The result is about 5% slower than the pure asm
approach, so it's not too bad (SSE asm is 2x faster
2008 Feb 28
8
How to read HUGE data sets?
Dear R-list,
Does somebody know how can I read a HUGE data set using R? It is a hapmap
data set (txt format) which is around 4GB. After read it, I need to delete
some specific rows and columns. I'm running R 2.6.2 patched over XP SP2
using a 2.4 GHz Core 2-Duo processor and 4GB RAM. Any suggestion would be
appreciated.
Thanks in advance,
Jorge
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2005 May 29
0
cpu utilization across speex versions
Kemal,
It sounds like you are doing something wrong. I strongly recommend that you
profile your application to see exactly where the CPU time is being spent.
AMD happens to have a nice profiler called CodeAnalyst that they give away
for free. And it's plenty usable on Intel CPUs as well.
http://www.amd.com/us-en/Processors/DevelopWithAMD/0,,30_2252_3604,00.html
Make sure you test a
2004 Aug 06
3
libspeex crash with RC3
I tried to compress 160 samples of random garbage (range 0-500.f) at 4kbps
and got a crash in nb_encode -> forced_pitch_quant because start
was -858993460 (== ol_pitch).
-- Daniel, Epic Games Inc.
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2005 Apr 20
2
Speex-1.1.7 seems to crash with --enable-sse (on P3/GCC-3.2)..
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<b></b>Hi,<br>
<br>
I also tried to build speex