diff --git a/ocr_test/ctcpp_entrypoint.cpp b/ocr_test/ctcpp_entrypoint.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..bbe95fd17cadc2fe30e36fb92d14b47c9de72c6e
--- /dev/null
+++ b/ocr_test/ctcpp_entrypoint.cpp
@@ -0,0 +1,203 @@
+#include <cstddef>
+#include <iostream>
+#include <algorithm>
+
+#include <ctcpp.h>
+
+#include "detail/cpu_ctc.h"
+
+
+namespace CTC {
+
+int get_warpctc_version() {
+    return 2;
+}
+
+const char* ctcGetStatusString(ctcStatus_t status) {
+	switch (status) {
+	case CTC_STATUS_SUCCESS:
+		return "no error";
+	case CTC_STATUS_MEMOPS_FAILED:
+		return "cuda memcpy or memset failed";
+	case CTC_STATUS_INVALID_VALUE:
+		return "invalid value";
+	case CTC_STATUS_EXECUTION_FAILED:
+		return "execution failed";
+
+	case CTC_STATUS_UNKNOWN_ERROR:
+	default:
+		return "unknown error";
+
+	}
+
+}
+
+template<typename Dtype>
+ctcStatus_t compute_ctc_loss_cpu(const Dtype* const activations,
+                             Dtype* gradients,
+                             const int* const flat_labels,
+                             const int* const label_lengths,
+                             const int* const input_lengths,
+                             int alphabet_size,
+                             int minibatch,
+                             Dtype *costs,
+                             void *workspace,
+                             ctcOptions options) {
+
+    if (activations == nullptr ||
+        flat_labels == nullptr ||
+        label_lengths == nullptr ||
+        input_lengths == nullptr ||
+        costs == nullptr ||
+        workspace == nullptr ||
+        alphabet_size <= 0 ||
+        minibatch <= 0)
+        return CTC_STATUS_INVALID_VALUE;
+
+    if (options.loc == CTC_CPU) {
+        CpuCTC<Dtype> ctc(alphabet_size, minibatch, workspace, options.num_threads,
+                          options.blank_label);
+
+        if (gradients != NULL)
+            return ctc.cost_and_grad(activations, gradients,
+                                     costs,
+                                     flat_labels, label_lengths,
+                                     input_lengths);
+        else
+            return ctc.score_forward(activations, costs, flat_labels,
+                                     label_lengths, input_lengths);
+    } else if (options.loc == CTC_GPU) {
+
+    } else {
+        return CTC_STATUS_INVALID_VALUE;
+    }
+	return CTC_STATUS_SUCCESS;
+}
+
+
+template <typename Dtype>
+ctcStatus_t get_workspace_size(const int* const label_lengths,
+                               const int* const input_lengths,
+                               int alphabet_size, int minibatch,
+                               ctcOptions options,
+                               size_t* size_bytes)
+{
+    if (label_lengths == nullptr ||
+        input_lengths == nullptr ||
+        size_bytes == nullptr ||
+        alphabet_size <= 0 ||
+        minibatch <= 0)
+        return CTC_STATUS_INVALID_VALUE;
+
+    // This is the max of all S and T for all examples in the minibatch.
+    int maxL = *std::max_element(label_lengths, label_lengths + minibatch);
+    int maxT = *std::max_element(input_lengths, input_lengths + minibatch);
+
+    const int S = 2 * maxL + 1;
+
+    *size_bytes = 0;
+
+    if (options.loc == CTC_GPU) {
+        // GPU storage
+        //nll_forward, nll_backward
+        *size_bytes += 2 * sizeof(Dtype) * minibatch;
+
+        //repeats
+        *size_bytes += sizeof(int) * minibatch;
+
+        //label offsets
+        *size_bytes += sizeof(int) * minibatch;
+
+        //utt_length
+        *size_bytes += sizeof(int) * minibatch;
+
+        //label lengths
+        *size_bytes += sizeof(int) * minibatch;
+
+        //labels without blanks - overallocate for now
+        *size_bytes += sizeof(int) * maxL * minibatch;
+
+        //labels with blanks
+        *size_bytes += sizeof(int) * S * minibatch;
+
+        //alphas
+        *size_bytes += sizeof(Dtype) * S * maxT * minibatch;
+
+        //denoms
+        *size_bytes += sizeof(Dtype) * maxT * minibatch;
+
+        //probs (since we will pass in activations)
+        *size_bytes += sizeof(Dtype) * alphabet_size * maxT * minibatch;
+
+    } else {
+        //cpu can eventually replace all minibatch with
+        //max number of concurrent threads if memory is
+        //really tight
+
+        //per minibatch memory
+        size_t per_minibatch_bytes = 0;
+
+        //output
+        per_minibatch_bytes += sizeof(Dtype) * alphabet_size ;
+
+        //alphas
+        per_minibatch_bytes += sizeof(Dtype) * S * maxT;
+
+        //betas
+        per_minibatch_bytes += sizeof(Dtype) * S;
+
+        //labels w/blanks, e_inc, s_inc
+        per_minibatch_bytes += 3 * sizeof(int) * S;
+
+        *size_bytes = per_minibatch_bytes * minibatch;
+
+        //probs
+        *size_bytes += sizeof(Dtype) * alphabet_size * maxT * minibatch;
+    }
+
+    return CTC_STATUS_SUCCESS;
+}
+ 
+ template
+ ctcStatus_t compute_ctc_loss_cpu<float>(const float* const activations,
+                              float* gradients,
+                              const int* const flat_labels,
+                              const int* const label_lengths,
+                              const int* const input_lengths,
+                              int alphabet_size,
+                              int minibatch,
+                              float *costs,
+                              void *workspace,
+                              ctcOptions options);
+ 
+ 
+ template
+ ctcStatus_t compute_ctc_loss_cpu<double>(const double* const activations,
+                              double* gradients,
+                              const int* const flat_labels,
+                              const int* const label_lengths,
+                              const int* const input_lengths,
+                              int alphabet_size,
+                              int minibatch,
+                              double *costs,
+                              void *workspace,
+                              ctcOptions);
+ 
+ 
+ template
+ ctcStatus_t get_workspace_size<float>(const int* const label_lengths,
+                                const int* const input_lengths,
+                                int alphabet_size, int minibatch,
+                                ctcOptions,
+                                size_t* size_bytes);
+ 
+ 
+ template
+ ctcStatus_t get_workspace_size<double>(const int* const label_lengths,
+                                const int* const input_lengths,
+                                int alphabet_size, int minibatch,
+                                ctcOptions,
+                                size_t* size_bytes);
+
+}  // namespace ctc
+