similar to: Speex Decode only on Blackfin

Hello, i want to create a little program on BF533 EZ KIT Lite and VDSP++ the purpose of this program is to compress an input audio frame with speex then uncompress it to get the audio frame on output of the EZ KIT the input sample rate is 16KHZ and i can't get a lower sample rate with this kit When i use a 160 samples frame and narrow band mode--> i got a bad result in output There is

Hi, I'm trying to encode a stereo speex file on the blackfin without much luck. This is a standalone application with no OS using the speex library provided in the blackfin multimedia sdk. I believe this library was ported to run using Visual DSP++ by Jean-Marc (may be wrong). I have mono encoding working fine, to add stereo encoding I just added a call to speex_encode_stereo_int()

On Tue 17 Apr 2007 02:15, Justin Clacherty pondered: > Hi, > > I'm trying to encode a stereo speex file on the blackfin without much > luck. This is a standalone application with no OS using the speex > library provided in the blackfin multimedia sdk. I believe this library > was ported to run using Visual DSP++ by Jean-Marc (may be wrong). Glad things are working - but to

-----Original Message----- From: Jean-Marc Valin [mailto:jean-marc.valin@usherbrooke.ca] Sent: Thursday, June 14, 2007 11:17 PM To: Michael Shatz Cc: speex-dev@xiph.org Subject: Re: [Speex-dev] Blackfin inline assembler and VisualDSP++ toolchain Michael Shatz a ?crit : >>> Actually, you're the first I know using the VisualDSP++ toolchain >>> :-) >> >> I guess

-----Original Message----- From: Jean-Marc Valin [mailto:jean-marc.valin@usherbrooke.ca] Sent: Tuesday, June 19, 2007 6:38 PM To: Michael Shatz Cc: speex-dev@xiph.org Subject: Re: [Speex-dev] Blackfin inline assembler and VisualDSP++ toolchain >> Yes, data footprint in the new version is quite manageable. Still I would >> wish better documentation for speex_alloc_scratch(). >

From: Jim Crichton [mailto:jim.crichton@comcast.net] Sent: Tuesday, June 19, 2007 10:47 PM > >For TI DSPs, I used a private memory array rather than the C stack, and a >debug patch in stack_alloc.h to measure the scratch usage: > >#if 1 >extern char *spxGlobalScratchFree; >#define ALLOC(var, size, type) (var = PUSH(stack, size, type),

> >Actually, you're the first I know using the VisualDSP++ toolchain :-) > I guess that's because speex has pretty big memory footprint. So developers that integrate speex tend to have plenty of RAM and once one has plenty of RAM he could install biggish OS. And between biggish OSes for Blackfin the most popular choice is uCLinux. And ucLinux works best with gnu tools. Something

Robin Getz a ?crit : >> As I told you, bank is a reserved keyword in Analog Devices compiler for >> Blackfin architecture. > > This seems lame, and maybe you need to change the header files inside VDSP++. > (This is pretty common for VDSP users to do when name space clashes occur > with open source software). > > Poking at the VDSP docs, says that it uses bank()

Hi Jean-Marc, As I told you, bank is a reserved keyword in Analog Devices compiler for Blackfin architecture. So we need to change the variables named bank to something else. Here's a patch that changes bank to bnk in the 3 concerned files. (Hope the format is OK) About my previous problems with the Blackfin: -> strange block repetition that could be cancelled by the AEC I was busy

Hi, Are there any optimized codecs for Analog Blackfin DSP? If yes, from where we can download it? We are looking for Speech, Audio and Video codecs. Best Regards, Miroslav Nachev

Hi, Thank you. I will try it. Do you know some G.72x, GSM, and iLBC optimized for Blackfin ? I mean open source. -- Best regards, Miroslav mailto:miro@space-comm.com Wednesday, March 23, 2005, 9:05:11 PM, you wrote: JMV> Hi, JMV> As far as I understand, the last patch (for TI C5x) I merged in SVN also JMV> allows Blackfin to work, but I haven't

Hi Bernhard, Can you confirm I'm understanding everything correctly? You encode with the same encoder and then decode with either A) blackfin assembly and fixed-point or B) fixed-point only on Blackfin. Then A) sounds bad and B) sounds good. If you do the same in narrowband, it sounds OK. Is that correct? If that's the case, it's *probably* some kind of bug and/or invalid assumption

Hi Marc, I encountered the problems even with older versions of speex, including 1.2beta2 and 1.1.12, too. I had no time in the last weeks to investigate this issue further, sorry. Hopefully, I'm able to do some more test the next days, but I have no real idea how to proceed Performance and quality seem to be o.k. for me if I deactivate the Blackfin optimizations inside the file

Frank Lorenz a ?crit : > And yes, the same "overflow" happens even when I disable Blackfin ASM > optimizations. Indeed, that shouldn't happen. Just to make sure I understand, so far there's two problems: 1) DIV32_16() in Blackfin assembly causes problems 2) The resampler overflows When you fix/workaround those two, is the encoder/decoder working correctly or are there

Hello Jean-Marc, I disabled the Blackfin optimization functions one by one and found the error in libspeex/lpc_bfin.h in the autocorrelation computation. Compared to the fixed-point-variant of that function (from lpc.c), the blackfin-code produces correct values except for the zero offset value. Additionally, the loop after the ASM-code assigned values (ac32) wrong to the functions

Hello everybody, I'm currently trying to run speex on the Blackfin (BF-537) STAMP evaluation board unter uCLinux. Using 1.2 beta 3, I encountered problems when activating the Blackfin assembler optimizations. Without optimizations for blackfin, i.e. calling ./configure --enable-fixed-point --host=bfin-uclinux everything seems to work fine. But when I add the --enable-blackfin-asm flag to

Hello, I'm using speex provided with the Blackfin SDK on a BF533 EZ-KIT LITE In this version of speex, the program is used in wide band with a sampling rate of 16KHZ But i want to use it in narrow band mode with a sampling rate of 8KHZ In AudDriverFuncs_AD1836.c file, i see that the supported sample rate are 48000, 24000 and 16000 --> I don't understand because in the readme file it

Hi all, I'm trying to run speex on the Blackfin processor. I'm not familiar with programming/compiling/linking at all, but I guess the first thing I need is libspeex compiled for Blackfin, so that my program can use the library functions. I've downloaded the source files (version 1.1.10) from www.speex.org and I've been trying to compile libspeex from within VisualDSP++, but it

Hi Jean-Marc, > Can you confirm I'm understanding everything correctly? You encode > with > the same encoder and then decode with either A) blackfin assembly and > fixed-point or B) fixed-point only on Blackfin. Then A) sounds bad and > B) sounds good. If you do the same in narrowband, it sounds OK. Is > that > correct? If that's the case, it's *probably* some

> I am trying to port speex lib to Blackfin processor. > I am using VisualDSP++ 4.0. I've never used VisualDSP++ 4.0. All the development on Blackfin has been done with gcc, which may explain some problems with the inline asm. Does VisualDSP++ support a syntax close to what gcc uses (with constraints) or more like the MS compilers. > If I am compiling source codes with using