Comments (1)
Here is an example implementation of a conv1D() function in C++ that is similar to the one in TensorFlow:
#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>
// Define a 1D convolution function
std::vector<float> conv1D(std::vector<float> input, std::vector<float> filter, int stride) {
int input_size = input.size();
int filter_size = filter.size();
int output_size = (input_size - filter_size) / stride + 1;
// Pad the input data with zeros
int padding = filter_size / 2;
std::vector<float> padded_input(input_size + 2 * padding, 0);
std::copy(input.begin(), input.end(), padded_input.begin() + padding);
// Perform convolution
std::vector<float> output(output_size);
for (int i = 0; i < output_size; i++) {
int start = i * stride;
int end = start + filter_size;
std::vector<float> window(padded_input.begin() + start, padded_input.begin() + end);
output[i] = std::inner_product(window.begin(), window.end(), filter.begin(), 0.0f);
}
return output;
}
int main() {
// Define input data
int input_size = 20000;
std::vector<float> input_data(input_size, 1.0f);
std::vector<int> input_shape = {500, 40};
// Reshape input data
int batch_size = input_shape[0];
int input_dim = input_shape[1];
std::vector<float> reshaped_input(batch_size * input_dim);
for (int i = 0; i < batch_size; i++) {
std::vector<float> input_row(input_data.begin() + i * input_dim, input_data.begin() + (i + 1) * input_dim);
std::copy(input_row.begin(), input_row.end(), reshaped_input.begin() + i * input_dim);
}
// Define convolution filter
int filter_size = 3;
int num_filters = 512;
std::vector<float> filter(filter_size * num_filters, 1.0f);
// Perform convolution
int stride = 1;
std::vector<float> output = conv1D(reshaped_input, filter, stride);
// Reshape output data
int output_dim = num_filters;
std::vector<int> output_shape = {batch_size, output_dim};
std::vector<float> reshaped_output(batch_size * output_dim);
for (int i = 0; i < batch_size; i++) {
std::vector<float> output_row(output.begin() + i * output_dim, output.begin() + (i + 1) * output_dim);
std::copy(output_row.begin(), output_row.end(), reshaped_output.begin() + i * output_dim);
}
std::cout << "Output shape: " << batch_size << "x" << output_dim << std::endl;
return 0;
}
This implementation defines a conv1D() function that takes an input data vector, a filter vector, and a stride value as inputs, and returns the convolved output data as a vector. It also includes code to reshape the input and output data to match the shapes you provided.
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