Quote:
Originally Posted by swg
Basically OpenCL would replace the assembly part, openCL allows for massively parallel operations to happen on GPU, CPU or any supported hardware and would be optimized accordingly.
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It has been explained a dozen times why the naive idea that you only need to throw your existing code on the GPU to get a massive speed-up is more than wrong
Summery: Writing code that actually runs fast on the GPU isn't trivial at all. Inventing new algorithms that are suitable for GPU is even harder. Switching from the CPU to the GPU often requires finding completely new solutions for your problems - which needs a whole lot of work! And in some cases the problem is inherently sequential and thus will never run (efficiently) on the GPU. Last but not least, moving only small parts of a software to the GPU isn't reasonable (speed-wise), because transferring data between the host memory and the GPU memory has a huge delay...
(The fact that all the "GPU encoders" available on market only reach fast encoding speed by sacrificing quality shows that GPU's aren't
that great for H.264 encoding)
