add some code

managed_components/espressif__esp-sr/include/esp32s2/esp_ns.h

@@ -0,0 +1,86 @@
+// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License
+#ifndef _ESP_NS_H_
+#define _ESP_NS_H_
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define NS_USE_SPIARM       0
+#define NS_FRAME_LENGTH_MS     10          //Supports 10ms, 20ms, 30ms
+
+/**
+* The Sampling frequency (Hz) must be 16000Hz
+*/
+
+typedef void* ns_handle_t;
+
+/**
+ * @brief Creates an instance to the NS structure.
+ *
+ * @param frame_length   The length of the audio processing can be 10ms, 20ms, 30ms.
+ *
+ * @return
+ *         - NULL: Create failed
+ *         - Others: The instance of NS
+ */
+ns_handle_t ns_create(int frame_length);
+
+/**
+ * @brief Creates an instance of the more powerful noise suppression algorithm.
+ * 
+ * @warning frame_length only supports be 10 ms.
+ *
+ * @param frame_length    The length of the audio processing can only be 10ms.
+ * @param mode            0: Mild, 1: Medium, 2: Aggressive
+ * @param sample_rate     The sample rate of the audio. 
+ *
+ * @return
+ *         - NULL: Create failed
+ *         - Others: The instance of NS
+ */
+ns_handle_t ns_pro_create(int frame_length, int mode, int sample_rate);
+
+/**
+ * @brief Feed samples of an audio stream to the NS and get the audio stream after Noise suppression.
+ *
+ * @param inst        The instance of NS.
+ *
+ * @param indata      An array of 16-bit signed audio samples.
+ *
+ * @param outdata     An array of 16-bit signed audio samples after noise suppression.
+ *
+ * @return None
+ *
+ */
+void ns_process(ns_handle_t inst, int16_t *indata, int16_t *outdata);
+
+/**
+ * @brief Free the NS instance
+ *
+ * @param inst The instance of NS.
+ *
+ * @return None
+ *
+ */
+void ns_destroy(ns_handle_t inst);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //_ESP_NS_H_