tomwalters@5: // Copyright 2007-2010, Thomas Walters
tomwalters@5: //
tomwalters@5: // AIM-C: A C++ implementation of the Auditory Image Model
tomwalters@5: // http://www.acousticscale.org/AIMC
tomwalters@5: //
tomwalters@45: // Licensed under the Apache License, Version 2.0 (the "License");
tomwalters@45: // you may not use this file except in compliance with the License.
tomwalters@45: // You may obtain a copy of the License at
tomwalters@5: //
tomwalters@45: //     http://www.apache.org/licenses/LICENSE-2.0
tomwalters@5: //
tomwalters@45: // Unless required by applicable law or agreed to in writing, software
tomwalters@45: // distributed under the License is distributed on an "AS IS" BASIS,
tomwalters@45: // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
tomwalters@45: // See the License for the specific language governing permissions and
tomwalters@45: // limitations under the License.
tomwalters@5: 
tomwalters@5: /*!
tomwalters@5:  * \file
tomwalters@5:  * \brief SAI 2003 module - for any output frame rate
tomwalters@5:  *
tomwalters@11:  * \author Thomas Walters <tom@acousticscale.org>
tomwalters@5:  * \date created 2007/03/28
tomwalters@5:  * \version \$Id$
tomwalters@5:  */
tomwalters@5: 
tomwalters@11: #ifndef AIMC_MODULES_STROBES_PARABOLA_H_
tomwalters@11: #define AIMC_MODULES_STROBES_PARABOLA_H_
tomwalters@5: 
tomwalters@5: #include <vector>
tomwalters@5: 
tomwalters@5: #include "Support/Module.h"
tomwalters@5: #include "Support/Parameters.h"
tomwalters@5: #include "Support/SignalBank.h"
tomwalters@5: 
tomwalters@5: namespace aimc {
tomwalters@5: using std::vector;
tomwalters@5: class ModuleParabola : public Module {
tomwalters@5:  public:
tomwalters@8:   explicit ModuleParabola(Parameters *params);
tomwalters@7:   virtual ~ModuleParabola();
tomwalters@7:   void Process(const SignalBank& input);
tomwalters@8:  private:
tomwalters@5:   /*! \brief Prepare the module
tomwalters@7:    *  \param input Input signal bank
tomwalters@7:    *  \param output true on success false on failure
tomwalters@7:    */
tomwalters@7:   virtual bool InitializeInternal(const SignalBank& input);
tomwalters@5: 
tomwalters@7:   virtual void ResetInternal();
tomwalters@5: 
tomwalters@5: 
tomwalters@8:   /*! \brief Number of samples over which the strobe should be decayed to
tomwalters@8:    *  zero
tomwalters@8:    */
tomwalters@7:   int strobe_decay_samples_;
tomwalters@5: 
tomwalters@7:   /*! \brief Current strobe thresholds, one for each bank channel.
tomwalters@7:    *
tomwalters@7:    *  This value is decayed over time.
tomwalters@7:    */
tomwalters@7:   vector<float> threshold_;
tomwalters@5: 
tomwalters@7:   /*! \brief Signal value at the last strobe, one for each bank channel.
tomwalters@7:    *
tomwalters@7:    *  This value is not decayed over time.
tomwalters@7:    */
tomwalters@7:   vector<float> last_threshold_;
tomwalters@5: 
tomwalters@8:   /*! \brief Parabola height parameter
tomwalters@8:    */
tomwalters@5:   float height_;
tomwalters@5: 
tomwalters@8:   /*! \brief Parabola width paramters
tomwalters@8:    */
tomwalters@5:   float parabw_;
tomwalters@5: 
tomwalters@8:   /*! \brief Parabola a value
tomwalters@8:    */
tomwalters@5:   vector<float> parab_a_;
tomwalters@5: 
tomwalters@8:   /*! \brief Parabola b value
tomwalters@8:    */
tomwalters@5:   vector<float> parab_b_;
tomwalters@5: 
tomwalters@8:   /*! \brief Parabola calculation variable
tomwalters@8:    */
tomwalters@5:   vector<float> parab_wnull_;
tomwalters@5: 
tomwalters@8:   /*! \brief Parabola calculation variable
tomwalters@8:    */
tomwalters@5:   vector<int> parab_var_samples_;
tomwalters@5: 
tomwalters@8:   /*! \brief Storage for the number of samples since the last strobe
tomwalters@8:    */
tomwalters@5:   vector<int> samples_since_last_strobe_;
tomwalters@5: 
tomwalters@5:   vector<float> prev_sample_;
tomwalters@5:   vector<float> curr_sample_;
tomwalters@5:   vector<float> next_sample_;
tomwalters@5: 
tomwalters@5:   float alpha_;
tomwalters@5:   int channel_count_;
tomwalters@5:   float sample_rate_;
tomwalters@5:   float strobe_decay_time_;
tomwalters@5: };
tomwalters@5: }  // namespace aimc
tomwalters@5: 
tomwalters@11: #endif  // AIMC_MODULES_STROBES_PARABOLA_H_