1 | // %flair:license{
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2 | // This file is part of the Flair framework distributed under the
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3 | // CECILL-C License, Version 1.0.
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4 | // %flair:license}
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5 | /*!
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6 | * \file LowPassFilter.h
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7 | * \brief Class defining a first order low pass filter
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8 | * \author Guillaume Sanahuja, Copyright Heudiasyc UMR UTC/CNRS 7253
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9 | * \date 2011/05/01
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10 | * \version 4.0
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11 | */
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12 |
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13 | #ifndef LOWPASSFILTER_FILTER_H
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14 | #define LOWPASSFILTER_FILTER_H
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15 |
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16 | #include <IODevice.h>
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17 |
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18 | namespace flair {
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19 | namespace core {
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20 | class cvmatrix;
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21 | }
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22 | namespace gui {
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23 | class Layout;
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24 | class LayoutPosition;
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25 | }
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26 | }
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27 |
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28 | class LowPassFilter_impl;
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29 |
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30 | namespace flair {
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31 | namespace filter {
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32 | /*! \class LowPassFilter
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33 | *
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34 | * \brief Class defining a first order low pass filter
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35 | */
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36 | class LowPassFilter : public core::IODevice {
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37 | public:
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38 | /*!
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39 | * \brief Constructor
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40 | *
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41 | * Construct a LowPassFilter at position. \n
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42 | * After calling this function, position will be deleted as it is no longer
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43 | *usefull. \n
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44 | * The filter is automatically updated when parent's
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45 | * IODevice::ProcessUpdate is called. \n
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46 | * The optional init_value parameters allow to specify
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47 | * the size of the input datas and its inital values.
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48 | * If unspecified, a 1*1 size is used, and values are
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49 | * initialized with 0.
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50 | *
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51 | * \param parent parent
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52 | * \param position position to display settings
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53 | * \param name name
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54 | * \param init_value initial value
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55 | */
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56 | LowPassFilter(const core::IODevice *parent,
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57 | const gui::LayoutPosition *position, std::string name,
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58 | const core::cvmatrix *init_value = NULL);
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59 |
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60 | /*!
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61 | * \brief Destructor
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62 | *
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63 | */
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64 | ~LowPassFilter();
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65 |
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66 | /*!
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67 | * \brief Output value
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68 | *
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69 | * \param row row element
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70 | * \param col column element
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71 | *
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72 | * \return element value
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73 | */
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74 | float Output(int row, int col) const;
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75 |
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76 | /*!
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77 | * \brief Output matrix
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78 | *
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79 | * \return filtered output
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80 | */
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81 | core::cvmatrix *Matrix(void) const;
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82 |
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83 | private:
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84 | /*!
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85 | * \brief Update using provided datas
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86 | *
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87 | * Reimplemented from IODevice.
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88 | *
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89 | * \param data data from the parent to process
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90 | */
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91 | void UpdateFrom(const core::io_data *data);
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92 |
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93 | class LowPassFilter_impl *pimpl_;
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94 | };
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95 | } // end namespace filter
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96 | } // end namespace flair
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97 | #endif // LOWPASSFILTER_FILTER_H
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