add nnom pack and example

components/ai/nnom/inc/layers/nnom_rnn.h

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2018-2020
+ * Jianjia Ma
+ * majianjia@live.com
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020-05-03     Jianjia Ma   The first version
+ */
+
+#ifndef __NNOM_RNN_H__
+#define __NNOM_RNN_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <string.h>
+#include <stdbool.h>
+
+#include "nnom.h"
+#include "nnom_layers.h"
+#include "nnom_local.h"
+#include "nnom_tensor.h"
+
+// a machine interface for configuration
+typedef struct _nnom_rnn_config_t
+{
+	nnom_layer_config_t super;
+	bool return_sequence;
+	bool stateful;
+	bool go_backwards;
+} nnom_rnn_config_t;
+
+// RNN cell base type
+typedef struct _nnom_rnn_cell_t
+{
+	nnom_status_t (*run)(struct _nnom_rnn_cell_t* cell); // cell runner
+	nnom_status_t (*build)(struct _nnom_rnn_cell_t* cell); // cell builder, calculate buffer size, output data size
+	nnom_status_t (*free)(struct _nnom_rnn_cell_t* cell); // 
+	nnom_layer_t *layer;				// pointer to its layer holder
+	nnom_layer_config_t *config;		// config for the cell event it is a layer type		
+	nnom_rnn_cell_type_t type;	
+
+	void *in_data;						// input data
+	void *out_data;						// output data
+	void *in_state;					// input state data (or hidden state)
+	void *out_state;				// output state data
+
+	size_t comp_buf_size;			// the size of temporary buffer. 
+	size_t state_size; 				// the size of hidden state
+	uint16_t units;					// the output units 
+	uint16_t feature_size;			// the input feature size (vector size)
+
+	size_t macc; // stat of MAC count. 
+} nnom_rnn_cell_t;
+
+typedef struct _nnom_rnn_layer_t
+{
+	nnom_layer_t super;
+	nnom_rnn_cell_t *cell;
+	void *state_buf;		// memory allocated to store state, size = 2 x size of state required by cell. 
+
+	uint16_t timestamp_size;// size of timestamp
+	bool return_sequence; 	// whether to return the output for each unit (sequence)
+	bool stateful;			// whether the states are kept after one inteference
+	bool go_backwards;		// whether go backwards timestamping
+} nnom_rnn_layer_t;
+
+
+// rnn layer 
+nnom_layer_t *rnn_s(nnom_rnn_cell_t *cell, const nnom_rnn_config_t* config);
+
+nnom_status_t rnn_run(nnom_layer_t* layer);
+nnom_status_t rnn_build(nnom_layer_t* layer);
+nnom_status_t rnn_free(nnom_layer_t* layer);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __NNOM_RNN_H__ */