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Re: [mpeg2-dev] Exception in mpeg2_idct_copy_sse2
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From: Matthew M. <mmc...@gm...> - 2010-05-05 04:56:33
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hmm. Not quite there. The OSSBuild GStreamer package contains: libmpeg2-0.dll libmpeg2convert-0.dll mpeg2.lib mpeg2convert.lib but unfortunately mpeg2convert.lib and mpeg2.lib are identical files. As a result, I'm unable to link to libmpeg2convert. Matt On 5 May 2010 13:49, Matthew McGinity <mmc...@gm...> wrote: > Hi David, > > Thanks. Those DLL's work and do indeed have SSE2 acceleration. > (SSE2 produces approx 30% speed increase on my machine). > > But it is frustrating that I can't get my own build working in Visual > Studio, as I would prefer to use a static library rather than a DLL. > > Thanks, > > Matt > > > > On 5 May 2010 02:46, Hoyt, David <ho...@ll...> wrote: > >> You can get a copy built by the OSSBuild folks: >> >> >> >> http://code.google.com/p/ossbuild/ >> >> >> >> Download and install the GPL version and then the GPL SDK and you’ll have >> the headers and libs you need. I’m unsure if it’s built w/ SSE2 or not. >> >> My work’s filter likes to put asterisks (*) in URLs to prevent people from >> clicking on just any link they find in an email, so if you see one, take it >> out. >> >> >> >> *From:* Matthew McGinity [mailto:mmc...@gm...] >> *Sent:* Tuesday, May 04, 2010 1:22 AM >> *To:* Keith Winstein >> *Cc:* lib...@li... >> *Subject:* Re: [mpeg2-dev] Exception in mpeg2_idct_copy_sse2 >> >> >> >> Hi, >> >> Can anyone confirm that they have SSE2 acceleration from a visual studio >> 2005 build of libmpeg2? >> How were those .obj files generated? >> >> Or perhaps someone could provide me with a release build of libmpeg2.lib >> 0.5.1 ?? >> >> Any ideas whatsoever greatly appreciated! >> >> Thanks >> >> Matt >> >> -- >> Matthew McGinity >> iCinema Centre for Interactive Cinema Research >> University of New South Wales, Sydney, Australia >> http://*www.*icinema.unsw.edu.au >> Tel: 0405 115 322 >> >> On 2 May 2010 17:46, Matthew McGinity <mmc...@gm...> wrote: >> >> Hi Keith, >> >> Just resending last mail without attachment so it's not bounced by the >> mailing-list. >> >> >> I've compiled both sample1 and mpeg2dec and they both suffer the same >> problem. >> I've compiled version 0.4.1 and that works fine - which is to be >> expected as the SSE2 support was introduced in version .5 >> >> > I didn't understand your remark about "I assume the source files for the >> > .obj files in vc++ cannot be built with VC++". Are you saying you're not >> > compiling libmpeg2 from the source code and just using somebody else's >> > build? >> >> I'm building my own version. My project has these source files: >> >> libmpeg2\alloc.c >> libmpeg2\decode.c >> libmpeg2\header.c >> libmpeg2\idct.c >> libmpeg2\motion_comp.c >> libmpeg2\motion_comp_vis.c >> libmpeg2\slice.c >> libmpeg2\convert\rgb.c >> libmpeg2\convert\rgb_vis.c >> libmpeg2\convert\uyvy.c >> >> and these object files: >> vc++\cpu_accel.obj >> vc++\cpu_state.obj >> vc++\idct_mmx.obj >> vc++\motion_comp_mmx.obj >> vc++\rgb_mmx.obj >> >> I tried compiling these .obj files from their corresponding source .c >> files but without success - I don't think they're intended to be >> built with vc++. >> >> The only changes I've made is removing #define restrict __restrict from >> config.h >> >> I can easily email out my complete solution should anyone with windows >> and Visual Studio 2005 be willing to take a look. >> (I don't think I can send attachments to this forum) >> >> Cheers, >> Matt >> >> >> > On 2 May 2010 02:43, Keith Winstein <ke...@mi...> wrote: >> >> Hi Matthew, >> >> >> >> We're here. Unfortunately I don't have Windows and would have a hard >> time >> >> trying to reproduce this problem for you. (It works fine for me with >> gcc on >> >> Linux; I recognize that's not very helpful to know.) >> >> >> >> Are you able to compile the "mpeg2dec" program that ships with >> libmpeg2? >> >> Does it also bomb out like this? >> >> >> >> I didn't understand your remark about "I assume the source files for >> the >> >> .obj files in vc++ cannot be built with VC++". Are you saying you're >> not >> >> compiling libmpeg2 from the source code and just using somebody else's >> >> build? Sorry for the confusion. >> >> >> >> Regards, >> >> Keith >> >> >> >> On Sat, 1 May 2010, Matthew McGinity wrote: >> >> >> >>> Hi, >> >>> >> >>> First question - is there anyone out there? Is this forum still alive? >> >>> >> >>> I have libmpeg2 version 5.0.1 compiling in VS2005. >> >>> My test file, based on sample5.c, works perfectly, provided I don't >> enable >> >>> SSE2. >> >>> >> >>> That is, if I change mpeg2_init() to use >> >>> mpeg2_accel(0); >> >>> or >> >>> mpeg2_accel(MPEG2_ACCEL_X86_MMX); >> >>> or >> >>> mpeg2_accel(MPEG2_ACCEL_X86_MMXEXT); >> >>> everything works fine. >> >>> >> >>> However, if I allow auto-detection >> >>> mpeg2_accel(MPEG2_ACCEL_DETECT); >> >>> it chooses sse2 acceleration and I get an exception on the very first >> >>> call to mpeg2_idct_copy in slice_intra_DCT in mpeg2_slice: >> >>> >> >>> "First-chance exception at 0x00445fa3 in icMPEG2Test.exe: 0xC0000005: >> >>> Access violation reading location 0xffffffff." >> >>> >> >>> Stack location is: _mpeg2_idct_copy_sse2() + 0x13 bytes >> >>> >> >>> In my project, I'm linking to all the .obj files provided in directory >> >>> \libmpeg2\vc++ >> >>> >> >>> Not quite sure how to proceed. I assume the source files for the .obj >> >>> files in vc++ >> >>> cannot be built with VC++. (I tried renaming __asm__ to __asm and >> >>> __volatile__ to volatile, but it didn't get me far). >> >>> >> >>> Any advice appreciated, >> >>> >> >>> Matt >> >>> - libmpeg2 v5.0.1, Windows XP, Intel Core2 Quad CPU Q9400, Visual >> Studio >> >>> 2005 >> >>> >> >>> >> >>> >> >>> -- >> >>> Matthew McGinity >> >>> iCinema Centre for Interactive Cinema Research >> >>> University of New South Wales, Sydney, Australia >> >>> http://*www.*icinema.unsw.edu.au >> >>> Tel: 0405 115 322 >> >>> >> >>> >> >>> >> ------------------------------------------------------------------------------ >> >>> _______________________________________________ >> >>> Libmpeg2-devel mailing list >> >>> Lib...@li... >> >>> https://*lists.sourceforge.net/lists/listinfo/libmpeg2-devel >> >>> >> >> >> > >> >> >> > > |
