add: delta calculation for hidden and output layer done

1 files changed, 20 insertions, 3 deletions

diff --git a/src/nn.h b/src/nn.h
index 62f438d..d6dd1fe 100644
--- a/src/nn.h
+++ b/src/nn.h
@@ -2,6 +2,7 @@
 #define __NN__
 
 #include <stdlib.h>
+#include <assert.h>
 #include <stdio.h>
 #include <stdint.h>
 #include <string.h>
@@ -18,11 +19,16 @@ typedef struct Layer {
 void nn_network_init_weights(Layer *network, size_t nmemb, size_t input_cols);
 void nn_network_free_weights(Layer *network, size_t nmemb);
 
-void nn_layer_map_activation(double (*activation)(double), double *aout, size_t aout_shape[2], double *zout, size_t zout_shape[2]);
+void nn_layer_map_activation(
+        double (*activation)(double),
+        double *aout, size_t aout_shape[2],
+        double *zout, size_t zout_shape[2]);
+
 void nn_layer_forward(Layer layer, double *out, size_t out_shape[2], double *input, size_t input_shape[2]);
 void nn_layer_backward(
-        Layer *layer,
+        Layer layer,
         double *weights,
+        double *cost_derivative, size_t dcost_shape[2],
         double *out, size_t out_shape[2],
         double *labels, size_t labels_shape[2],
         double *local_gradient); //TODO
@@ -33,5 +39,16 @@ double identity(double x);
 
 
 void nn_forward(double **aout, double **zout, double *input, size_t input_shape[2], Layer network[], size_t network_size);
-double nn_layer_out_delta(double error, double (*activation_derivative)(double));
+void nn_layer_out_delta(
+        double *delta, size_t delta_cols,
+        double *error, size_t error_cols,
+        double *zout, size_t zout_cols,
+        double (*activation_derivative)(double));//TODO
+
+void nn_layer_hidden_delta(
+        double *delta, size_t delta_cols,
+        double *delta_next, size_t delta_next_cols,
+        double *weigths_next, size_t weigths_shape[2],
+        double *zout, size_t zout_cols,
+        double (*activation_derivative)(double));//TODO
 #endif