tomwalters@292: // Copyright 2010, Thomas Walters
tomwalters@292: //
tomwalters@292: // AIM-C: A C++ implementation of the Auditory Image Model
tomwalters@292: // http://www.acousticscale.org/AIMC
tomwalters@292: //
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@292: //
tomwalters@318: //     http://www.apache.org/licenses/LICENSE-2.0
tomwalters@292: //
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@292: 
tomwalters@292: /*!
tomwalters@292:  * \author Thomas Walters <tom@acousticscale.org>
tomwalters@292:  * \date created 2010/02/22
tomwalters@292:  * \version \$Id$
tomwalters@292:  */
tomwalters@292: 
tomwalters@292: #include "Modules/Profile/ModuleScaler.h"
tomwalters@292: 
tomwalters@292: namespace aimc {
tomwalters@292: ModuleScaler::ModuleScaler(Parameters *params) : Module(params) {
tomwalters@292:   module_description_ = "Scale each value by the channel centre frequency";
tomwalters@292:   module_identifier_ = "scaler";
tomwalters@292:   module_type_ = "profile";
tomwalters@292:   module_version_ = "$Id$";
tomwalters@292: }
tomwalters@292: 
tomwalters@292: ModuleScaler::~ModuleScaler() {
tomwalters@292: }
tomwalters@292: 
tomwalters@292: bool ModuleScaler::InitializeInternal(const SignalBank &input) {
tomwalters@292:   // Copy the parameters of the input signal bank into internal variables, so
tomwalters@292:   // that they can be checked later.
tomwalters@292:   sample_rate_ = input.sample_rate();
tomwalters@292:   buffer_length_ = input.buffer_length();
tomwalters@292:   channel_count_ = input.channel_count();
tomwalters@292:   output_.Initialize(channel_count_, buffer_length_, sample_rate_);
tomwalters@292:   return true;
tomwalters@292: }
tomwalters@292: 
tomwalters@292: void ModuleScaler::ResetInternal() {
tomwalters@292: }
tomwalters@292: 
tomwalters@292: void ModuleScaler::Process(const SignalBank &input) {
tomwalters@292:   // Check to see if the module has been initialized. If not, processing
tomwalters@292:   // should not continue.
tomwalters@292:   if (!initialized_) {
tomwalters@292:     LOG_ERROR(_T("Module %s not initialized."), module_identifier_.c_str());
tomwalters@292:     return;
tomwalters@292:   }
tomwalters@292: 
tomwalters@292:   // Check that ths input this time is the same as the input passed to
tomwalters@292:   // Initialize()
tomwalters@292:   if (buffer_length_ != input.buffer_length()
tomwalters@292:       || channel_count_ != input.channel_count()) {
tomwalters@292:     LOG_ERROR(_T("Mismatch between input to Initialize() and input to "
tomwalters@292:                  "Process() in module %s."), module_identifier_.c_str());
tomwalters@292:     return;
tomwalters@292:   }
tomwalters@292: 
tomwalters@292:   output_.set_start_time(input.start_time());
tomwalters@292: 
tomwalters@292:   for (int ch = 0; ch < input.channel_count(); ++ch) {
tomwalters@292:     float cf = input.centre_frequency(ch);
tomwalters@292:     for (int i = 0; i < input.buffer_length(); ++i) {
tomwalters@292:       output_.set_sample(ch, i, cf * input.sample(ch, i));
tomwalters@292:     }
tomwalters@292:   }
tomwalters@292:   PushOutput();
tomwalters@292: }
tomwalters@292: }  // namespace aimc
tomwalters@292: