Hi Conan,
be sure to update to the latest revision of flitr and osgCuda. There has
been some fixes (very recent) for the proper handling of cudaMallocPitch
allocated arrays.
The example should be able to read any movie file that FFmpeg can
consume. It would even consume single .jpg/.png image files too. The
example will convert any input to grayscale.
If you still get weird tearing, try making a 1024x1024 image and see
what that does.
HTH
jp
On 10/10/2011 16:19, Conan Doyle wrote:
I finally got everything built and running... one more question...
What type of video format does the cuda_auto_contrast example takes
as input. I had an avi (not sure of any specfics) on my machine and
the example read it and display it (as far as I could tell) but it
was scrolling in a funky way other wierness...
CD
J.P. Delport wrote:
Hi,
On 07/10/2011 17:32, Conan Doyle wrote:
I went to the link for the cuda_auto_contrast example... looks
like it is part of flitr(?)... do I have to build all of flitr to
build this cuda example?
you only have to build it if you want a running example.
Alternatively you can just study the code to see how an FBO texture
is passed into osgCuda.
jp
CD
J.P. Delport wrote:
Hi,
On 05/10/2011 22:23, Conan Doyle wrote:
Hi,
My schedule lightened up a bit... I have an extra 24 hours
to work on my osg/cuda problem, so I would like to
incorporate CUDA into osg the "correct" way, which I think
may be osgCUDA.
Here's what I am currently doing
Step 1 App renders scene to a FLOAT texture via a FBO/RTT
camera Step 2 This texture is used as input to a shader on a
second pass/RTT camera. The shader does some calibration
stuff then renders it to a full screen quad. Step 3 Final
render pass renders quad from step 2.
Here's what I NEED to do...
Step 1.5 Pass texture from Step 1 to a cuda kernel for
processing before the calibration pass (Step 2)
Questions:
1. Is this something I can use osgCUDA to do? 2. Would it
be similar to the osgTexDemo? 3. Can I use an FBO, or do I
have to switch to a PBO RTT?
1. Absolutely 2. Not sure, but I will forward you an example
from the osgCuda devs too. I can also point you to one of our
examples that does something similar. See the code here:
http://code.google.com/p/flitr/source/browse/#svn%2Ftrunk%2Fexamples%2Fcuda_auto_contrast
In the above example all you have to change is to place shader passes
before or after the cuda pass. E.g. take the glsl_shader
example and just change the texture types to
osgCuda::TextureRectangle.
3. FBO is OK.
CUDA 4.0 is not necessary but would be cool as I have to use
it eventually, but to get past this proof of principal step I
can use 3.2... or 2.3...
CUDA 4.0 works fine and then you can play with Thrust too :)
cheers jp
CD
Thank you!
Cheers, Conan
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