optimize HID Host disconnection procedure

components/esp_hid/private/esp_hidh_private.h

@@ -123,7 +123,9 @@ esp_hidh_dev_report_t *esp_hidh_dev_get_input_report_by_id_and_proto(esp_hidh_de
 esp_hidh_dev_report_t *esp_hidh_dev_get_input_report_by_proto_and_data(esp_hidh_dev_t *dev, int protocol_mode,
                                                                        size_t len, const uint8_t *data, bool *has_report_id);
 esp_hidh_dev_report_t *esp_hidh_dev_get_report_by_handle(esp_hidh_dev_t *dev, uint16_t handle);  //BLE Only
-void esp_hidh_process_event_data_handler(void *event_handler_arg, esp_event_base_t event_base, int32_t event_id,
+void esp_hidh_preprocess_event_handler(void *event_handler_arg, esp_event_base_t event_base, int32_t event_id,
+                                       void *event_data);
+void esp_hidh_post_process_event_handler(void *event_handler_arg, esp_event_base_t event_base, int32_t event_id,
                                          void *event_data);
 void esp_hidh_dev_lock(esp_hidh_dev_t *dev);
 void esp_hidh_dev_unlock(esp_hidh_dev_t *dev);

components/esp_hid/src/ble_hidh.c

@@ -51,6 +51,7 @@ static esp_event_loop_handle_t event_loop_handle;
 static uint8_t *s_read_data_val = NULL;
 static uint16_t s_read_data_len = 0;
 static esp_gatt_status_t s_read_status = ESP_GATT_OK;
+static esp_event_handler_t s_event_callback;
 
 static esp_gatt_status_t read_char(esp_gatt_if_t gattc_if, uint16_t conn_id, uint16_t handle, esp_gatt_auth_req_t auth_req, uint8_t **out, uint16_t *out_len)
 {
@@ -616,6 +617,18 @@ static void esp_ble_hidh_dev_dump(esp_hidh_dev_t *dev, FILE *fp)
 
 }
 
+static void esp_ble_hidh_event_handler_wrapper(void *event_handler_arg, esp_event_base_t event_base, int32_t event_id,
+                                               void *event_data)
+{
+    esp_hidh_preprocess_event_handler(event_handler_arg, event_base, event_id, event_data);
+
+    if (s_event_callback) {
+        s_event_callback(event_handler_arg, event_base, event_id, event_data);
+    }
+
+    esp_hidh_post_process_event_handler(event_handler_arg, event_base, event_id, event_data);
+}
+
 esp_err_t esp_ble_hidh_init(const esp_hidh_config_t *config)
 {
     esp_err_t ret;
@@ -653,10 +666,10 @@ esp_err_t esp_ble_hidh_init(const esp_hidh_config_t *config)
             break;
         }
         WAIT_CB();
+
+        s_event_callback = config->callback;
         ret = esp_event_handler_register_with(event_loop_handle, ESP_HIDH_EVENTS, ESP_EVENT_ANY_ID,
-                                              esp_hidh_process_event_data_handler, NULL);
-        ret |= esp_event_handler_register_with(event_loop_handle, ESP_HIDH_EVENTS, ESP_EVENT_ANY_ID, config->callback,
-                                              config->callback_arg);
+                                              esp_ble_hidh_event_handler_wrapper, config->callback_arg);
     } while (0);
 
     if (ret != ESP_OK) {
@@ -690,6 +703,8 @@ esp_err_t esp_ble_hidh_deinit(void)
     }
     vSemaphoreDelete(s_ble_hidh_cb_semaphore);
     s_ble_hidh_cb_semaphore = NULL;
+    s_event_callback = NULL;
+
     return err;
 }
 

components/esp_hid/src/bt_hidh.c

@@ -27,6 +27,7 @@ typedef struct {
 typedef struct {
     fixed_queue_t *connection_queue; /* Queue of connection */
     esp_event_loop_handle_t event_loop_handle;
+    esp_event_handler_t event_callback;
 } hidh_local_param_t;
 
 static hidh_local_param_t hidh_local_param;
@@ -172,6 +173,8 @@ static void free_local_param(void)
     if (hidh_local_param.connection_queue) {
         fixed_queue_free(hidh_local_param.connection_queue, free);
     }
+
+    hidh_local_param.event_callback = NULL;
 }
 
 static void open_failed_cb(esp_hidh_dev_t *dev, esp_hidh_status_t status, esp_hidh_event_data_t *p,
@@ -992,6 +995,18 @@ static void esp_bt_hidh_dev_dump(esp_hidh_dev_t *dev, FILE *fp)
     }
 }
 
+static void esp_bt_hidh_event_handler_wrapper(void *event_handler_arg, esp_event_base_t event_base, int32_t event_id,
+                                              void *event_data)
+{
+    esp_hidh_preprocess_event_handler(event_handler_arg, event_base, event_id, event_data);
+
+    if (hidh_local_param.event_callback) {
+        hidh_local_param.event_callback(event_handler_arg, event_base, event_id, event_data);
+    }
+
+    esp_hidh_post_process_event_handler(event_handler_arg, event_base, event_id, event_data);
+}
+
 esp_err_t esp_bt_hidh_init(const esp_hidh_config_t *config)
 {
     esp_err_t ret = ESP_OK;
@@ -1019,10 +1034,10 @@ esp_err_t esp_bt_hidh_init(const esp_hidh_config_t *config)
             ret = ESP_FAIL;
             break;
         }
+
+        hidh_local_param.event_callback = config->callback;
         ret = esp_event_handler_register_with(hidh_local_param.event_loop_handle, ESP_HIDH_EVENTS, ESP_EVENT_ANY_ID,
-                                              esp_hidh_process_event_data_handler, NULL);
-        ret |= esp_event_handler_register_with(hidh_local_param.event_loop_handle, ESP_HIDH_EVENTS, ESP_EVENT_ANY_ID,
-                                               config->callback, config->callback_arg);
+                                              esp_bt_hidh_event_handler_wrapper, config->callback_arg);
         if (ret != ESP_OK) {
             ESP_LOGE(TAG, "event_loop register failed!");
             ret = ESP_FAIL;

components/esp_hid/src/esp_hidh.c

@@ -18,11 +18,8 @@ ESP_EVENT_DEFINE_BASE(ESP_HIDH_EVENTS);
 static const char *TAG = "ESP_HIDH";
 
 static esp_hidh_dev_head_t s_esp_hidh_devices;
-static esp_timer_handle_t s_esp_hidh_timer;
 static SemaphoreHandle_t s_esp_hidh_devices_semaphore = NULL;
 
-static void esp_hidh_dev_delay_free(void *arg);
-
 static inline void lock_devices(void)
 {
     if (s_esp_hidh_devices_semaphore != NULL) {
@@ -74,17 +71,6 @@ esp_err_t esp_hidh_init(const esp_hidh_config_t *config)
 
     TAILQ_INIT(&s_esp_hidh_devices);
 
-    esp_timer_create_args_t timer_config = {
-        .callback = &esp_hidh_dev_delay_free,
-        .arg = NULL,
-        .name = "hidh_timer"
-    };
-
-    if ((err = esp_timer_create(&timer_config, &s_esp_hidh_timer)) != ESP_OK) {
-        ESP_LOGE(TAG, "%s create timer failed!", __func__);
-        return err;
-    }
-
     s_esp_hidh_devices_semaphore = xSemaphoreCreateMutex();
     if (s_esp_hidh_devices_semaphore == NULL) {
         ESP_LOGE(TAG, "xSemaphoreCreateMutex failed!");
@@ -108,8 +94,6 @@ esp_err_t esp_hidh_init(const esp_hidh_config_t *config)
     if (err != ESP_OK) {
         vSemaphoreDelete(s_esp_hidh_devices_semaphore);
         s_esp_hidh_devices_semaphore = NULL;
-        esp_timer_delete(s_esp_hidh_timer);
-        s_esp_hidh_timer = NULL;
     }
 
     return err;
@@ -123,11 +107,6 @@ esp_err_t esp_hidh_deinit(void)
         return err;
     }
 
-    if (esp_timer_is_active(s_esp_hidh_timer)) {
-        ESP_LOGE(TAG, "Busy, try again later!");
-        return ESP_ERR_NOT_FINISHED;
-    }
-
     if (!TAILQ_EMPTY(&s_esp_hidh_devices)) {
         ESP_LOGE(TAG, "Please disconnect all devices first!");
         return err;
@@ -151,8 +130,6 @@ esp_err_t esp_hidh_deinit(void)
         TAILQ_INIT(&s_esp_hidh_devices);
         vSemaphoreDelete(s_esp_hidh_devices_semaphore);
         s_esp_hidh_devices_semaphore = NULL;
-        esp_timer_delete(s_esp_hidh_timer);
-        s_esp_hidh_timer = NULL;
     }
     return err;
 }
@@ -742,20 +719,6 @@ esp_err_t esp_hidh_dev_free_inner(esp_hidh_dev_t *dev)
     return ret;
 }
 
-static void esp_hidh_dev_delay_free(void *arg)
-{
-    esp_hidh_dev_t *d = NULL;
-    esp_hidh_dev_t *next = NULL;
-    lock_devices();
-    TAILQ_FOREACH_SAFE(d, &s_esp_hidh_devices, devices, next) {
-        if (!d->in_use) {
-            TAILQ_REMOVE(&s_esp_hidh_devices, d, devices);
-            esp_hidh_dev_resources_free(d);
-        }
-    }
-    unlock_devices();
-}
-
 #if CONFIG_BLUEDROID_ENABLED
 esp_hidh_dev_t *esp_hidh_dev_get_by_bda(esp_bd_addr_t bda)
 {
@@ -805,10 +768,10 @@ esp_hidh_dev_t *esp_hidh_dev_get_by_conn_id(uint16_t conn_id)
 
 /**
  * The deep copy data append the end of the esp_hidh_event_data_t, move the data pointer to the correct address. This is
- * a workaround way, it's better to use flexiable array in the interface.
+ * a workaround way, it's better to use flexible array in the interface.
  */
-void esp_hidh_process_event_data_handler(void *event_handler_arg, esp_event_base_t event_base, int32_t event_id,
-                                         void *event_data)
+void esp_hidh_preprocess_event_handler(void *event_handler_arg, esp_event_base_t event_base, int32_t event_id,
+                                       void *event_data)
 {
     esp_hidh_event_t event = (esp_hidh_event_t)event_id;
     esp_hidh_event_data_t *param = (esp_hidh_event_data_t *)event_data;
@@ -824,19 +787,25 @@ void esp_hidh_process_event_data_handler(void *event_handler_arg, esp_event_base
             param->feature.data = (uint8_t *)param + sizeof(esp_hidh_event_data_t);
         }
         break;
+    default:
+        break;
+    }
+}
+
+void esp_hidh_post_process_event_handler(void *event_handler_arg, esp_event_base_t event_base, int32_t event_id,
+                                         void *event_data)
+{
+    esp_hidh_event_t event = (esp_hidh_event_t)event_id;
+    esp_hidh_event_data_t *param = (esp_hidh_event_data_t *)event_data;
+
+    switch (event) {
     case ESP_HIDH_OPEN_EVENT:
         if (param->open.status != ESP_OK) {
-            if (s_esp_hidh_timer && !esp_timer_is_active(s_esp_hidh_timer) &&
-                esp_timer_start_once(s_esp_hidh_timer, ESP_HIDH_DELAY_FREE_TO) != ESP_OK) {
-                ESP_LOGE(TAG, "%s set hidh timer failed!", __func__);
-            }
+            esp_hidh_dev_free_inner(param->open.dev);
         }
         break;
     case ESP_HIDH_CLOSE_EVENT:
-        if (s_esp_hidh_timer && !esp_timer_is_active(s_esp_hidh_timer) &&
-            esp_timer_start_once(s_esp_hidh_timer, ESP_HIDH_DELAY_FREE_TO) != ESP_OK) {
-            ESP_LOGE(TAG, "%s set hidh timer failed!", __func__);
-        }
+        esp_hidh_dev_free_inner(param->close.dev);
         break;
     default:
         break;