CLAM-Development
1.1
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00001 /* 00002 * Copyright (c) 2004 MUSIC TECHNOLOGY GROUP (MTG) 00003 * UNIVERSITAT POMPEU FABRA 00004 * 00005 * 00006 * This program is free software; you can redistribute it and/or modify 00007 * it under the terms of the GNU General Public License as published by 00008 * the Free Software Foundation; either version 2 of the License, or 00009 * (at your option) any later version. 00010 * 00011 * This program is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 * GNU General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU General Public License 00017 * along with this program; if not, write to the Free Software 00018 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00019 * 00020 */ 00021 00022 #include "AudioMixer.hxx" 00023 #include "ProcessingFactory.hxx" 00024 00025 00026 namespace CLAM 00027 { 00028 00029 namespace Hidden 00030 { 00031 static const char * metadata[] = { 00032 "key", "AudioMixer", 00033 "category", "Arithmetic Operations", 00034 "description", "AudioMixer", 00035 0 00036 }; 00037 static FactoryRegistrator<ProcessingFactory, AudioMixer> reg = metadata; 00038 } 00039 00040 AudioMixer::AudioMixer() 00041 : mOutputPort("Output Audio",this) 00042 { 00043 Configure( mConfig ); 00044 } 00045 00046 void AudioMixer::CreatePortsAndControls() 00047 { 00048 for( int i=0; i<mConfig.GetNumberOfInPorts(); i++ ) 00049 { 00050 std::stringstream number(""); 00051 number << i; 00052 AudioInPort * inPort = new AudioInPort( "Input " + number.str(), this ); 00053 inPort->SetSize( mConfig.GetFrameSize() ); 00054 inPort->SetHop( mConfig.GetFrameSize() ); 00055 mInputPorts.push_back( inPort ); 00056 00057 mInputControls.push_back( new InControl("Gain " + number.str(), this) ); 00058 } 00059 for( int i=0; i<mConfig.GetNumberOfInPorts(); i++ ) 00060 { 00061 /* Set gain = 1 by default */ 00062 mInputControls[i]->DoControl(1.); 00063 } 00064 00065 mOutputPort.SetSize( mConfig.GetFrameSize()); 00066 mOutputPort.SetHop( mConfig.GetFrameSize()); 00067 } 00068 00069 void AudioMixer::RemovePortsAndControls() 00070 { 00071 std::vector< AudioInPort* >::iterator itInPort; 00072 for(itInPort=mInputPorts.begin(); itInPort!=mInputPorts.end(); itInPort++) 00073 delete *itInPort; 00074 mInputPorts.clear(); 00075 00076 std::vector< InControl* >::iterator itInControl; 00077 for(itInControl=mInputControls.begin(); itInControl!=mInputControls.end(); itInControl++) 00078 delete *itInControl; 00079 mInputControls.clear(); 00080 00081 GetInPorts().Clear(); 00082 GetInControls().Clear(); 00083 } 00084 00085 bool AudioMixer::ConcreteConfigure(const ProcessingConfig& c) 00086 { 00087 CopyAsConcreteConfig(mConfig, c); 00088 RemovePortsAndControls(); 00089 CreatePortsAndControls(); 00090 return true; 00091 } 00092 00093 bool AudioMixer::Do() 00094 { 00095 unsigned int frameSize = mConfig.GetFrameSize(); 00096 unsigned int numInPorts = mConfig.GetNumberOfInPorts(); 00097 00098 TData normConstant = (TData)1.0 /TData(numInPorts); 00099 TData * output = mOutputPort.GetAudio().GetBuffer().GetPtr(); 00100 TData * inputs[numInPorts]; 00101 TControlData controls[numInPorts]; 00102 for (unsigned int i = 0; i<numInPorts; i++) 00103 { 00104 inputs[i]=mInputPorts[i]->GetAudio().GetBuffer().GetPtr(); 00105 controls[i]=mInputControls[i]->GetLastValue(); 00106 } 00107 00108 for (unsigned int sample=0; sample < frameSize; sample++) 00109 { 00110 TData sum=0.0; 00111 for (unsigned int inPort=0; inPort< numInPorts; inPort++) 00112 { 00113 sum += inputs[inPort][sample] * controls[inPort]; 00114 } 00115 output[sample] = sum * normConstant; 00116 } 00117 00118 // execute consume/produce methods 00119 for (unsigned int inPort=0; inPort<numInPorts; inPort++) 00120 mInputPorts[inPort]->Consume(); 00121 mOutputPort.Produce(); 00122 00123 return true; 00124 } 00125 00126 } // namespace CLAM 00127