ct2rs 0.9.19

Rust bindings for OpenNMT/CTranslate2
Documentation 
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#include "ctranslate2/ops/mean.h"

#include "dispatch.h"

namespace ctranslate2 {
  namespace ops {

    Mean::Mean(const dim_t axis)
      : _axis(axis)
    {
    }

    void Mean::operator()(const StorageView& input, StorageView& output) const {
      PROFILE("Mean");

      const dim_t axis = _axis < 0 ? input.rank() + _axis : _axis;
      if (axis >= input.rank())
        throw std::out_of_range("Cannot compute mean of axis " + std::to_string(axis)
                                + " for input with rank " + std::to_string(input.rank()));

      const dim_t axis_size = input.dim(axis);
      if (axis_size == 1) {
        output = input;
        output.squeeze(axis);
        return;
      }

      {
        Shape output_shape(input.shape());
        output_shape.erase(output_shape.begin() + axis);
        output.resize(std::move(output_shape));
      }

      dim_t inner_size = 1;
      dim_t outer_size = 1;
      for (dim_t i = 0; i < axis; ++i)
        outer_size *= input.dim(i);
      for (dim_t i = axis + 1; i < input.rank(); ++i)
        inner_size *= input.dim(i);

      DEVICE_AND_FLOAT_DISPATCH("Mean", input.device(), input.dtype(),
                                (compute<D, T>(input, outer_size, axis_size, inner_size, false, output)));
    }

  }
}