Help with resampling algorithm implementation

DSP, Plugin and Host development discussion.


Hi everyone,
I hope this is the right forum to post this question. I am trying to implement the resampling algorithm as described in this paper:

I managed to construct the h (windowed sinc) table, and I have implemented the loop. I am having a hard time to compute the eta interpolation factor and the l index index for the h table. The "fixed point" implementation of the paper is a bit confusing to me.

Looking at figure 7 in the paper, I think the interpolation factor needs to be computed between the h entries instead of between the original samples. However I don't understand how to compute the starting point (h(0)).

I have just started working with audio code, so I might be misunderstanding something fundamental about the paper.

The prototype of my implementation can be found here: ... d9466608ce

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