Layers API

#include "aicraft/layers.h"

AcLayer

All layers share the AcLayer type:

typedef struct AcLayer {
    AcTensor *weights;
    AcTensor *bias;
    AcTensor *(*forward)(struct AcLayer *, AcTensor *);
    int type;
} AcLayer;

Dense (Fully Connected)

AcLayer *ac_dense(int in_features, int out_features, AcActivation act);

Parameter	Description
in_features	Input dimension
out_features	Output dimension
act	Activation: AC_RELU, AC_SIGMOID, AC_SOFTMAX, AC_NONE

Example

AcLayer *layer = ac_dense(784, 128, AC_RELU);
AcTensor *out = layer->forward(layer, input);

Sequential Forward

AcTensor *ac_forward_seq(AcLayer **layers, int n, AcTensor *input);

Pass input through a sequence of layers:

AcLayer *net[] = {
    ac_dense(784, 128, AC_RELU),
    ac_dense(128, 10,  AC_SOFTMAX)
};
AcTensor *out = ac_forward_seq(net, 2, x);

Activation Functions

Activation	Constant	Formula
ReLU	AC_RELU	max(0, x)
Sigmoid	AC_SIGMOID	1 / (1 + e⁻ˣ)
Softmax	AC_SOFTMAX	eˣⁱ / Σeˣʲ
None	AC_NONE	Identity

Weight Initialisation

Weights are initialised using Kaiming (He) uniform initialisation by default. Biases are initialised to zero.