tomwalters@20: // Copyright 2010, Thomas Walters
tomwalters@20: //
tomwalters@20: // AIM-C: A C++ implementation of the Auditory Image Model
tomwalters@20: // http://www.acousticscale.org/AIMC
tomwalters@20: //
tomwalters@20: // This program is free software: you can redistribute it and/or modify
tomwalters@20: // it under the terms of the GNU General Public License as published by
tomwalters@20: // the Free Software Foundation, either version 3 of the License, or
tomwalters@20: // (at your option) any later version.
tomwalters@20: //
tomwalters@20: // This program is distributed in the hope that it will be useful,
tomwalters@20: // but WITHOUT ANY WARRANTY; without even the implied warranty of
tomwalters@20: // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
tomwalters@20: // GNU General Public License for more details.
tomwalters@20: //
tomwalters@20: // You should have received a copy of the GNU General Public License
tomwalters@20: // along with this program.  If not, see <http://www.gnu.org/licenses/>.
tomwalters@20: 
tomwalters@20: /*!
tomwalters@20:  * \author Thomas Walters <tom@acousticscale.org>
tomwalters@20:  * \date created 2010/02/22
tomwalters@20:  * \version \$Id$
tomwalters@20:  */
tomwalters@20: 
tomwalters@20: #include "Modules/Profile/ModuleScaler.h"
tomwalters@20: 
tomwalters@20: namespace aimc {
tomwalters@20: ModuleScaler::ModuleScaler(Parameters *params) : Module(params) {
tomwalters@20:   module_description_ = "Scale each value by the channel centre frequency";
tomwalters@20:   module_identifier_ = "scaler";
tomwalters@20:   module_type_ = "profile";
tomwalters@20:   module_version_ = "$Id$";
tomwalters@20: }
tomwalters@20: 
tomwalters@20: ModuleScaler::~ModuleScaler() {
tomwalters@20: }
tomwalters@20: 
tomwalters@20: bool ModuleScaler::InitializeInternal(const SignalBank &input) {
tomwalters@20:   // Copy the parameters of the input signal bank into internal variables, so
tomwalters@20:   // that they can be checked later.
tomwalters@20:   sample_rate_ = input.sample_rate();
tomwalters@20:   buffer_length_ = input.buffer_length();
tomwalters@20:   channel_count_ = input.channel_count();
tomwalters@20:   output_.Initialize(channel_count_, buffer_length_, sample_rate_);
tomwalters@20:   return true;
tomwalters@20: }
tomwalters@20: 
tomwalters@20: void ModuleScaler::ResetInternal() {
tomwalters@20: }
tomwalters@20: 
tomwalters@20: void ModuleScaler::Process(const SignalBank &input) {
tomwalters@20:   // Check to see if the module has been initialized. If not, processing
tomwalters@20:   // should not continue.
tomwalters@20:   if (!initialized_) {
tomwalters@20:     LOG_ERROR(_T("Module %s not initialized."), module_identifier_.c_str());
tomwalters@20:     return;
tomwalters@20:   }
tomwalters@20: 
tomwalters@20:   // Check that ths input this time is the same as the input passed to
tomwalters@20:   // Initialize()
tomwalters@20:   if (buffer_length_ != input.buffer_length()
tomwalters@20:       || channel_count_ != input.channel_count()) {
tomwalters@20:     LOG_ERROR(_T("Mismatch between input to Initialize() and input to "
tomwalters@20:                  "Process() in module %s."), module_identifier_.c_str());
tomwalters@20:     return;
tomwalters@20:   }
tomwalters@20: 
tomwalters@20:   output_.set_start_time(input.start_time());
tomwalters@20: 
tomwalters@20:   for (int ch = 0; ch < input.channel_count(); ++ch) {
tomwalters@20:     float cf = input.centre_frequency(ch);
tomwalters@20:     for (int i = 0; i < input.buffer_length(); ++i) {
tomwalters@20:       output_.set_sample(ch, i, cf * input.sample(ch, i));
tomwalters@20:     }
tomwalters@20:   }
tomwalters@20:   PushOutput();
tomwalters@20: }
tomwalters@20: }  // namespace aimc
tomwalters@20: