tomwalters@277: // Copyright 2007-2010, Thomas Walters
tomwalters@277: //
tomwalters@277: // AIM-C: A C++ implementation of the Auditory Image Model
tomwalters@277: // http://www.acousticscale.org/AIMC
tomwalters@277: //
tomwalters@318: // Licensed under the Apache License, Version 2.0 (the "License");
tomwalters@318: // you may not use this file except in compliance with the License.
tomwalters@318: // You may obtain a copy of the License at
tomwalters@277: //
tomwalters@318: //     http://www.apache.org/licenses/LICENSE-2.0
tomwalters@277: //
tomwalters@318: // Unless required by applicable law or agreed to in writing, software
tomwalters@318: // distributed under the License is distributed on an "AS IS" BASIS,
tomwalters@318: // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
tomwalters@318: // See the License for the specific language governing permissions and
tomwalters@318: // limitations under the License.
tomwalters@277: 
tomwalters@277: /*!
tomwalters@277:  * \file
tomwalters@277:  * \brief SAI 2003 module - for any output frame rate
tomwalters@277:  *
tomwalters@283:  * \author Thomas Walters <tom@acousticscale.org>
tomwalters@277:  * \date created 2007/03/28
tomwalters@277:  * \version \$Id$
tomwalters@277:  */
tomwalters@277: 
tomwalters@283: #ifndef AIMC_MODULES_STROBES_PARABOLA_H_
tomwalters@283: #define AIMC_MODULES_STROBES_PARABOLA_H_
tomwalters@277: 
tomwalters@277: #include <vector>
tomwalters@277: 
tomwalters@277: #include "Support/Module.h"
tomwalters@277: #include "Support/Parameters.h"
tomwalters@277: #include "Support/SignalBank.h"
tomwalters@277: 
tomwalters@277: namespace aimc {
tomwalters@277: using std::vector;
tomwalters@277: class ModuleParabola : public Module {
tomwalters@277:  public:
tomwalters@280:   explicit ModuleParabola(Parameters *params);
tomwalters@279:   virtual ~ModuleParabola();
tomwalters@279:   void Process(const SignalBank& input);
tomwalters@280:  private:
tomwalters@277:   /*! \brief Prepare the module
tomwalters@279:    *  \param input Input signal bank
tomwalters@279:    *  \param output true on success false on failure
tomwalters@279:    */
tomwalters@279:   virtual bool InitializeInternal(const SignalBank& input);
tomwalters@277: 
tomwalters@279:   virtual void ResetInternal();
tomwalters@277: 
tomwalters@277: 
tomwalters@280:   /*! \brief Number of samples over which the strobe should be decayed to
tomwalters@280:    *  zero
tomwalters@280:    */
tomwalters@279:   int strobe_decay_samples_;
tomwalters@277: 
tomwalters@279:   /*! \brief Current strobe thresholds, one for each bank channel.
tomwalters@279:    *
tomwalters@279:    *  This value is decayed over time.
tomwalters@279:    */
tomwalters@279:   vector<float> threshold_;
tomwalters@277: 
tomwalters@279:   /*! \brief Signal value at the last strobe, one for each bank channel.
tomwalters@279:    *
tomwalters@279:    *  This value is not decayed over time.
tomwalters@279:    */
tomwalters@279:   vector<float> last_threshold_;
tomwalters@277: 
tomwalters@280:   /*! \brief Parabola height parameter
tomwalters@280:    */
tomwalters@277:   float height_;
tomwalters@277: 
tomwalters@280:   /*! \brief Parabola width paramters
tomwalters@280:    */
tomwalters@277:   float parabw_;
tomwalters@277: 
tomwalters@280:   /*! \brief Parabola a value
tomwalters@280:    */
tomwalters@277:   vector<float> parab_a_;
tomwalters@277: 
tomwalters@280:   /*! \brief Parabola b value
tomwalters@280:    */
tomwalters@277:   vector<float> parab_b_;
tomwalters@277: 
tomwalters@280:   /*! \brief Parabola calculation variable
tomwalters@280:    */
tomwalters@277:   vector<float> parab_wnull_;
tomwalters@277: 
tomwalters@280:   /*! \brief Parabola calculation variable
tomwalters@280:    */
tomwalters@277:   vector<int> parab_var_samples_;
tomwalters@277: 
tomwalters@280:   /*! \brief Storage for the number of samples since the last strobe
tomwalters@280:    */
tomwalters@277:   vector<int> samples_since_last_strobe_;
tomwalters@277: 
tomwalters@277:   vector<float> prev_sample_;
tomwalters@277:   vector<float> curr_sample_;
tomwalters@277:   vector<float> next_sample_;
tomwalters@277: 
tomwalters@277:   float alpha_;
tomwalters@277:   int channel_count_;
tomwalters@277:   float sample_rate_;
tomwalters@277:   float strobe_decay_time_;
tomwalters@277: };
tomwalters@277: }  // namespace aimc
tomwalters@277: 
tomwalters@283: #endif  // AIMC_MODULES_STROBES_PARABOLA_H_