bugfix(mn): fix the bug in command_search function

include/esp32/esp_mn_iface.h

@@ -3,7 +3,7 @@
 #include "esp_wn_iface.h"
 
 #define ESP_MN_RESULT_MAX_NUM 5
-#define ESP_MN_MAX_PHRASE_NUM 200
+#define ESP_MN_MAX_PHRASE_NUM 400
 #define ESP_MN_MAX_PHRASE_LEN 63
 #define ESP_MN_MIN_PHRASE_LEN 2
 
@@ -12,11 +12,31 @@
 #define ESP_MN_CHINESE "cn"
 
 typedef enum {
-	ESP_MN_STATE_DETECTING = 0,     // detecting
-	ESP_MN_STATE_DETECTED = 1,      // detected
+    ESP_MN_STATE_DETECTING = 0,     // detecting
+    ESP_MN_STATE_DETECTED = 1,      // detected
     ESP_MN_STATE_TIMEOUT = 2,       // time out
 } esp_mn_state_t;
 
+//Set multinet loading mode
+//The memory comsumption is decreased with increasing mode, 
+//As a consequence also the CPU loading rate goes up
+typedef enum {
+    ESP_MN_LOAD_FROM_PSRAM = 0,          // Load all weights from PSRAM. Fastest computation with Maximum memory consumption
+    ESP_MN_LOAD_FROM_PSRAM_FLASH = 1,    // Load some weights from PSRAM and laod the rest from FLASH (default)
+    ESP_MN_LOAD_FROM_FLASH = 2,          // Load more weights from FLASH. Minimum memory consumption with slowest computation
+} esp_mn_loader_mode_t;
+
+typedef enum {
+    ESP_MN_GREEDY_SEARCH = 0,          // greedy search
+    ESP_MN_BEAM_SEARCH = 1,            // beam search
+    ESP_MN_BEAM_SEARCH_WITH_FST = 2,  // beam search with trie language model
+} esp_mn_search_method_t;
+
+typedef enum {
+    CHINESE_ID = 1,       // Chinese language
+    ENGLISH_ID = 2,       // English language
+} language_id_t;
+
 // Return all possible recognition results
 typedef struct{
     esp_mn_state_t state;
@@ -24,18 +44,14 @@ typedef struct{
     int command_id[ESP_MN_RESULT_MAX_NUM];     // The list of command id.
     int phrase_id[ESP_MN_RESULT_MAX_NUM];      // The list of phrase id.
     float prob[ESP_MN_RESULT_MAX_NUM];         // The list of probability.
+    char string[256];
 } esp_mn_results_t;
 
-typedef struct{
-    int16_t num;                                // The number of error phrases, which can not added into model
-    int16_t phrase_idx[ESP_MN_MAX_PHRASE_NUM];  // The error phrase index in singly linked list．
-} esp_mn_error_t;
-
 typedef struct {
-    char phoneme_string[ESP_MN_MAX_PHRASE_LEN + 1];  // phoneme string
-    int16_t command_id;                              // the command id
-    float threshold;                                 // trigger threshold, default: 0
-    int16_t *wave;                                   // prompt wave data of the phrase
+    char *string;                               // command string
+    int16_t command_id;                         // the command id
+    float threshold;                            // trigger threshold, default: 0
+    int16_t *wave;                              // prompt wave data of the phrase
 } esp_mn_phrase_t;
 
 typedef struct _mn_node_ {
@@ -43,6 +59,11 @@ typedef struct _mn_node_ {
     struct _mn_node_ *next;
 } esp_mn_node_t;
 
+typedef struct{
+    int16_t num;                                // The number of error phrases, which can not added into model
+    esp_mn_phrase_t **phrases;                  // The array of error phrase pointer
+} esp_mn_error_t;
+
 /**
  * @brief Initialze a model instance with specified model name.
  *
@@ -53,6 +74,18 @@ typedef struct _mn_node_ {
  */
 typedef model_iface_data_t* (*esp_mn_iface_op_create_t)(const char *model_name, int duration);
 
+/**
+ * @brief Switch multinet mode to change memory consumption and CPU loading
+ * 
+ * @warning Just Support multinet6 or later versions
+ *
+ * @param model The model object to query
+ * @param mode  The multinet loader mode
+ *
+ * @returns Handle to the model data.
+ */
+typedef model_iface_data_t* (*esp_mn_iface_op_switch_loader_mode_t)(model_iface_data_t *model, esp_mn_loader_mode_t mode);
+
 /**
  * @brief Callback function type to fetch the amount of samples that need to be passed to the detect function
  *
@@ -130,6 +163,14 @@ typedef esp_mn_results_t* (*esp_mn_iface_op_get_results_t)(model_iface_data_t *m
  */
 typedef void (*esp_mn_iface_op_open_log_t)(model_iface_data_t *model_data);
 
+/**
+ * @brief Clean all status of model
+ *
+ * @param model_data       The model object to query.
+ *
+ */
+typedef void (*esp_mn_iface_op_clean_t)(model_iface_data_t *model_data);
+
 /**
  * @brief Set the speech commands by mn_command_root
  *
@@ -139,15 +180,36 @@ typedef void (*esp_mn_iface_op_open_log_t)(model_iface_data_t *model_data);
  */
 typedef esp_mn_error_t* (*esp_wn_iface_op_set_speech_commands)(model_iface_data_t *model_data, esp_mn_node_t *mn_command_root);
 
+
+/**
+ * @brief Print out current commands in fst, note the ones "added" but not "updated" will not be shown here
+ * 
+ * @param model_data     The model object to query
+*/
+typedef void (*esp_mn_iface_op_print_active_speech_commands)(model_iface_data_t *model_data);
+
+/**
+ * @brief Check if input string can be tokenized
+ * 
+ * @param model_data     The model object to query
+ * @param str            The input string
+*/
+typedef int (*esp_mn_iface_op_check_speech_command)(model_iface_data_t *model_data, char *str);
+
 typedef struct {
     esp_mn_iface_op_create_t create;
     esp_mn_iface_op_get_samp_rate_t get_samp_rate;
     esp_mn_iface_op_get_samp_chunksize_t get_samp_chunksize;
     esp_mn_iface_op_get_samp_chunknum_t get_samp_chunknum;
     esp_mn_iface_op_set_det_threshold_t set_det_threshold;
+    esp_mn_iface_op_get_language_t get_language;
     esp_mn_iface_op_detect_t detect; 
     esp_mn_iface_op_destroy_t destroy;
     esp_mn_iface_op_get_results_t get_results;
     esp_mn_iface_op_open_log_t open_log;
+    esp_mn_iface_op_clean_t clean;
     esp_wn_iface_op_set_speech_commands set_speech_commands;
+    esp_mn_iface_op_switch_loader_mode_t switch_loader_mode;
+    esp_mn_iface_op_print_active_speech_commands print_active_speech_commands;
+    esp_mn_iface_op_check_speech_command check_speech_command;
 } esp_mn_iface_t;

src/esp_mn_speech_commands.c

@@ -70,7 +70,7 @@ esp_err_t esp_mn_commands_clear(void)
 esp_mn_node_t *esp_mn_command_search(char *string) 
 {
     esp_mn_node_t *temp = esp_mn_root;
-    if(NULL != esp_mn_root) {
+    if(NULL == esp_mn_root) {
         return NULL;
     }