/* Copyright 2012 Dietrich Epp <depp@zdome.net> */
#include "defs.h"
#include "filter.h"
#include "resample.h"
#include "resample_func.h"

namespace {
  template<auto func>
  void helper(lfr_fixed_t* pos, lfr_fixed_t inv_ratio, unsigned* dither, void* out, int outlen, const void* in, int inlen, const lfr_filter* filter)
  {
    return func(*pos, inv_ratio, *dither, out, outlen, in, inlen, *filter);
  }
}

lfr_resample_func_t
lfr_resample_s16func(int nchan, const struct lfr_filter *filter)
{
    const auto ftype = filter->type;
    switch (nchan) {
    case 1:
        switch (ftype) {
        case LFR_FTYPE_S16:
          return helper<lfr_resample<short, short, short, int, 1, 14>>;

        case LFR_FTYPE_F32:
          return helper<lfr_resample<short, short, short, int, 1, 14>>;

        default:
            break;
        }
        break;

    case 2:
        switch (ftype) {
        case LFR_FTYPE_S16:
          return helper<lfr_resample<short, short, short, int, 2, 14>>;

        case LFR_FTYPE_F32:
          return helper<lfr_resample<short, short, float, float, 2, 14>>;

        default:
            break;
        }
        break;

    default:
        break;
    }

    return NULL;
}