[mpeg2-dev] Exception in mpeg2_idct_copy_sse2

[Matthew M. <mmc...@gm...>]

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