tomwalters@268: // Copyright 2006-2010, Thomas Walters
tomwalters@268: //
tomwalters@268: // AIM-C: A C++ implementation of the Auditory Image Model
tomwalters@268: // http://www.acousticscale.org/AIMC
tomwalters@268: //
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@268: //
tomwalters@318: //     http://www.apache.org/licenses/LICENSE-2.0
tomwalters@268: //
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@268: 
tomwalters@268: /*! \file
tomwalters@268:  *  \brief SAI module
tomwalters@268:  */
tomwalters@268: 
tomwalters@268: /*! \author Thomas Walters <tom@acousticscale.org>
tomwalters@268:  *  \date created 2007/08/29
tomwalters@296:  *  \version \$Id$
tomwalters@268:  */
tomwalters@283: #ifndef AIMC_MODULES_SAI_SAI_H_
tomwalters@283: #define AIMC_MODULES_SAI_SAI_H_
tomwalters@268: 
tomwalters@268: #include <vector>
tomwalters@268: 
tomwalters@268: #include "Support/Module.h"
tomwalters@268: #include "Support/SignalBank.h"
tomwalters@268: #include "Support/StrobeList.h"
tomwalters@268: 
tomwalters@268: namespace aimc {
tomwalters@268: using std::vector;
tomwalters@268: class ModuleSAI : public Module {
tomwalters@268:  public:
tomwalters@280:   explicit ModuleSAI(Parameters *parameters);
tomwalters@268:   virtual ~ModuleSAI();
tomwalters@268:   void Process(const SignalBank &input);
tomwalters@268: 
tomwalters@268:  private:
tomwalters@268:   /*! \brief Prepare the module
tomwalters@268:    *  \param input Input signal bank
tomwalters@268:    *  \param output true on success false on failure
tomwalters@268:    */
tomwalters@268:   bool InitializeInternal(const SignalBank &input);
tomwalters@268: 
tomwalters@275:   virtual void ResetInternal();
tomwalters@275: 
tomwalters@280:   /*! \brief Temporary buffer for constructing the current SAI frame
tomwalters@280:    */
tomwalters@268:   SignalBank sai_temp_;
tomwalters@268: 
tomwalters@280:   /*! \brief List of strobes for each channel
tomwalters@280:    */
tomwalters@268:   vector<StrobeList> active_strobes_;
tomwalters@268: 
tomwalters@280:   /*! \brief Buffer decay parameter
tomwalters@280:    */
tomwalters@268:   float buffer_memory_decay_;
tomwalters@268: 
tomwalters@280:   /*! \brief Sample index of minimum strobe delay
tomwalters@280:    */
tomwalters@268:   int min_strobe_delay_idx_;
tomwalters@268: 
tomwalters@280:   /*! \brief Sample index of maximum strobe delay
tomwalters@280:    */
tomwalters@268:   int max_strobe_delay_idx_;
tomwalters@268: 
tomwalters@280:   /*! \brief Factor with which the SAI should be decayed
tomwalters@280:    */
tomwalters@268:   float sai_decay_factor_;
tomwalters@268: 
tomwalters@280:   /*! \brief Precomputed 1/n^alpha values for strobe weighting
tomwalters@280:    */
tomwalters@268:   vector<float> strobe_weights_;
tomwalters@268: 
tomwalters@280:   /*! \brief Next Strobe for each channels
tomwalters@280:    */
tomwalters@268:   vector<int> next_strobes_;
tomwalters@268: 
tomwalters@268:   float strobe_weight_alpha_;
tomwalters@268: 
tomwalters@268:   /*! \brief The maximum number strobes that can be active at the same time.
tomwalters@268:    *
tomwalters@268:    */
tomwalters@268:   int max_concurrent_strobes_;
tomwalters@268: 
tomwalters@268:   int fire_counter_;
tomwalters@268: 
tomwalters@280:   /*! \brief Period in milliseconds between output frames
tomwalters@280:    */
tomwalters@277:   float frame_period_ms_;
tomwalters@277:   int frame_period_samples_;
tomwalters@268: 
tomwalters@277:   float min_delay_ms_;
tomwalters@277:   float max_delay_ms_;
tomwalters@277:   int channel_count_;
tomwalters@268: };
tomwalters@268: }  // namespace aimc
tomwalters@268: 
tomwalters@283: #endif  // AIMC_MODULES_SAI_SAI_H_