text: // Copyright 2018-2019 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 _dsps_view_H_
  #define _dsps_view_H_
  
  #include "dsp_err.h"
  
  #ifdef __cplusplus
  extern "C"
  {
  #endif
  
  /**
   * @brief   plot view
   * 
   * Generic view function.
   * This function takes input samples and show then in console view as a plot.
   * The main purpose to give and draft debug information to the DSP developer.
   *
   * @param[in] data: array with input samples.
   * @param len: length of the input array
   * @param width: plot width in symbols
   * @param height: plot height in lines
   * @param min: minimum value that will be limited by Axis Y.
   * @param max: maximum value that will be limited by Axis Y.
   * @param view_char: character to draw the plot calues ('.' or '|' etc)
   *
   */
  
  void dsps_view(const float *data, int32_t len, int width, int height, float min, float max, char view_char);
  
  /**
   * @brief   spectrum view
   * 
   * The view function to show spectrum values  in 64x10 screen.
   * The function based on dsps_view.
   *
   * @param[in] data: array with input samples.
   * @param len: length of the input array
   * @param min: minimum value that will be limited by Axis Y.
   * @param max: maximum value that will be limited by Axis Y.
   *
   */
  void dsps_view_spectrum(const float *data, int32_t len, float min, float max);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif // _dsps_view_H_