tomwalters@32: // Copyright 2010, Thomas Walters
tomwalters@32: //
tomwalters@32: // AIM-C: A C++ implementation of the Auditory Image Model
tomwalters@32: // http://www.acousticscale.org/AIMC
tomwalters@32: //
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@32: //
tomwalters@45: //     http://www.apache.org/licenses/LICENSE-2.0
tomwalters@32: //
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@32: 
tomwalters@32: /*!
tomwalters@32:  * \author Thomas Walters <tom@acousticscale.org>
tomwalters@32:  * \date created 2010/02/24
tomwalters@32:  * \version \$Id$
tomwalters@32:  */
tomwalters@32: 
tomwalters@32: #ifndef AIMC_MODULES_SNR_NOISE_H_
tomwalters@32: #define AIMC_MODULES_SNR_NOISE_H_
tomwalters@32: 
tomwalters@32: #include <boost/random.hpp>
tomwalters@32: 
tomwalters@32: #include "Support/Module.h"
tomwalters@32: 
tomwalters@32: namespace aimc {
tomwalters@32: class ModuleNoise : public Module {
tomwalters@32:  public:
tomwalters@32:   explicit ModuleNoise(Parameters *pParam);
tomwalters@32:   virtual ~ModuleNoise();
tomwalters@32: 
tomwalters@32:   /*! \brief Process a buffer
tomwalters@32:    */
tomwalters@32:   virtual void Process(const SignalBank &input);
tomwalters@32: 
tomwalters@32:  private:
tomwalters@32:   /*! \brief Reset the internal state of the module
tomwalters@32:    */
tomwalters@32:   virtual void ResetInternal();
tomwalters@32: 
tomwalters@32:   /*! \brief Prepare the module
tomwalters@32:    *  \param input Input signal
tomwalters@32:    *  \param output true on success false on failure
tomwalters@32:    */
tomwalters@32:   virtual bool InitializeInternal(const SignalBank &input);
tomwalters@32: 
tomwalters@32:   float sample_rate_;
tomwalters@32:   int buffer_length_;
tomwalters@32:   int channel_count_;
tomwalters@32: 
tomwalters@32:   float multiplier_;
tomwalters@32: 
tomwalters@32:   // Random number generator which yeilds Gaussian-distributed values by
tomwalters@32:   // The generator is a Mersenne twister
tomwalters@32:   boost::variate_generator<boost::mt19937,
tomwalters@32:                            boost::normal_distribution<float> >
tomwalters@32:                            gaussian_variate_;
tomwalters@32: };
tomwalters@32: }  // namespace aimc
tomwalters@32: 
tomwalters@32: #endif  // AIMC_MODULES_SNR_NOISE_H_