Re: [Mjpeg-users] Re: mpeg2enc malloc fails?

[Steven M. S. <sm...@2B...>]

On Mon, 29 Dec 2003, John Gay wrote:

> I ran ./autogen.sh, but it failed for something. Don't remember exactly what. 

	Hmmm, my guess would be something related to libtool

> As for the newer version of libtool, I'll try that and see if it helps.

> However, since this compile error is related to calling nasm to compile the 
> mmx/sse optimizations, and the malloc fails had nothing to do with these 
> optimizations, I moved nasm and re-ran ./configure to compile without them.

	Well, that's not 100% true.   Disabling the MMX/SSE portion of the
	build causes a fall back to the pure C code.  The C code is completely
	insensitive to the alignment of the allocated buffers - it's the
	MMX/SSE code that insists on correct (16byte I believe) alignment.

> This worked fine and now I have an mpeg2enc that works fine on my glibc-2.2.5 

	But __slowly__ - the MMX/SSE optimizations will give somewhere 
	around a 4x (or more) increase in speed.

> system. So now you know that your fix works for glibc-2.2.5
	
	It does indeed sound encouraging - at least the coredump was avoided 
	but I wonder if that's because the MMX/SSE code was not built...


	Cheers,
	Steven Schultz