[FFmpeg-devel] Patch for CUDA Scale Filter

[Timo Rothenpieler]

>>> Having to run a .bat file prior to building isn't really nice, and not something I and some other people on IRC would like to see in ffmpeg.
> 
>>> Instead, it would be nice if configure/make would learn how to handle .cu files, converting them straight to an object-file.
>>> My idea for this would be to teach the Makefiles about .cu files, and using a shell script as their compiler.
>>> That script can then call nvcc and include the ptx2c functionality, and additionally also calls the designated C compiler, so for the build system it converts .cu to .o.
> 
> I wanted to fix the Makefiles but find it pretty complicated. Are there any pointers that could be useful as a start point.

Yeah, they are quite complex.
 From how I understand it, it basically should boil down to adding 
something to common.mak like:

CU2C=..../compat/cuda/cu2c.sh

%.ptx.c: %.cu
	$(CU2C) $<

Then adding something.ptx.o to the OBJS list _should_ cause make to do 
the right thing. But I'm not a Makefile expert.