├── LICENSE ├── README.rdoc ├── SoundAnalyser ├── SoundAnalyser.pro ├── main.cpp ├── mainwindow.cpp ├── mainwindow.h ├── mainwindow.ui ├── soundanalyser.png ├── testfftdisplay.cpp └── testfftdisplay.h ├── libbeat.pro └── src ├── alsarecorder.cpp ├── alsarecorder.h ├── beatanalyser.cpp ├── beatanalyser.h ├── beatcontroller.cpp ├── beatcontroller.h ├── fft.cpp ├── fft.h ├── pulserecorder.cpp ├── pulserecorder.h ├── soundbuffer.cpp ├── soundbuffer.h ├── soundrecorder.cpp ├── soundrecorder.h ├── src.pro ├── subband.cpp └── subband.h /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.rdoc: -------------------------------------------------------------------------------- 1 | = libbeat 2 | 3 | This is libbeat, a lightweight beat detection library for Qt. It currently supports ALSA[http://www.alsa-project.org/main/index.php/Main_Page] and PulseAudio[http://www.pulseaudio.org/]. It uses fftw[http://www.fftw.org/] to process the samples. 4 | 5 | Only tested on Linux. 6 | 7 | The software is still in development and pre-alpha. 8 | 9 | == Sample Application 10 | 11 | The library comes with a sample Qt Application, simply run 12 | 13 | qmake 14 | make 15 | 16 | in the root directory to build it. 17 | 18 | Make sure you have fftw3, alsa (or PulseAudio) and Qt4 installed! 19 | 20 | === Testing 21 | 22 | When running the application, make sure to declare the right LIBRARY_PATH. 23 | This should work from within the SoundAnalyser directory: 24 | 25 | 26 | LD_LIBRARY_PATH=../src ./SoundAnalyser 27 | 28 | Screenshot[https://github.com/mguentner/libbeat/raw/master/SoundAnalyser/soundanalyser.png] 29 | 30 | * The blue circle indicates a snare drum beat. 31 | * The yellow circle indicates a drum bass beat. 32 | * The red areas indicate a beat in the corresponding subband. 33 | * The magenta rectangles represent the current detection threshold for the corresponding subband. 34 | 35 | 36 | = License 37 | 38 | Copyright @2011 Maximilian Güntner under the GPL v3 39 | -------------------------------------------------------------------------------- /SoundAnalyser/SoundAnalyser.pro: -------------------------------------------------------------------------------- 1 | #------------------------------------------------- 2 | # 3 | # Project created by QtCreator 2011-04-27T10:08:17 4 | # 5 | #------------------------------------------------- 6 | 7 | QT += core gui widgets 8 | 9 | TARGET = SoundAnalyser 10 | TEMPLATE = app 11 | DEPENDPATH += ../src 12 | INCLUDEPATH += ../src 13 | 14 | SOURCES += main.cpp\ 15 | mainwindow.cpp \ 16 | testfftdisplay.cpp 17 | 18 | 19 | HEADERS += mainwindow.h \ 20 | testfftdisplay.h \ 21 | subband.h \ 22 | soundrecorder.h \ 23 | soundbuffer.h \ 24 | pulserecorder.h \ 25 | fft.h \ 26 | beatcontroller.h \ 27 | beatanalyser.h \ 28 | alsarecorder.h 29 | 30 | FORMS += mainwindow.ui 31 | 32 | LIBS += -L../src/ -lbeat 33 | 34 | OTHER_FILES += \ 35 | soundanalyser.png 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | -------------------------------------------------------------------------------- /SoundAnalyser/main.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include 19 | #include "mainwindow.h" 20 | #include 21 | int main(int argc, char *argv[]) 22 | { 23 | QApplication a(argc, argv); 24 | MainWindow w; 25 | w.show(); 26 | return a.exec(); 27 | } 28 | -------------------------------------------------------------------------------- /SoundAnalyser/mainwindow.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "mainwindow.h" 19 | #include "ui_mainwindow.h" 20 | 21 | MainWindow::MainWindow(QWidget *parent) : 22 | QMainWindow(parent), 23 | ui(new Ui::MainWindow) 24 | { 25 | ui->setupUi(this); 26 | QStringList windowFunctions; 27 | windowFunctions << "No Window" << "Hanning" << "Blackman"; 28 | ui->windowFunctionComboBox->addItems(windowFunctions); 29 | connect(this->ui->startButton,SIGNAL(clicked()),ui->widget,SLOT(start())); 30 | connect(this->ui->stopButton,SIGNAL(clicked()),ui->widget,SLOT(stop())); 31 | connect(this->ui->windowFunctionComboBox,SIGNAL(currentIndexChanged(QString)),ui->widget, SLOT(windowFunctionChanged(QString))); 32 | 33 | } 34 | 35 | MainWindow::~MainWindow() 36 | { 37 | delete ui; 38 | } 39 | 40 | 41 | void MainWindow::on_startButton_clicked() 42 | { 43 | ui->startButton->setDown(true); 44 | } 45 | 46 | -------------------------------------------------------------------------------- /SoundAnalyser/mainwindow.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef MAINWINDOW_H 19 | #define MAINWINDOW_H 20 | 21 | #include 22 | namespace Ui { 23 | class MainWindow; 24 | } 25 | 26 | class MainWindow : public QMainWindow 27 | { 28 | Q_OBJECT 29 | 30 | public: 31 | explicit MainWindow(QWidget *parent = 0); 32 | ~MainWindow(); 33 | 34 | 35 | private slots: 36 | void on_startButton_clicked(); 37 | 38 | private: 39 | Ui::MainWindow *ui; 40 | }; 41 | 42 | #endif // MAINWINDOW_H 43 | -------------------------------------------------------------------------------- /SoundAnalyser/mainwindow.ui: -------------------------------------------------------------------------------- 1 | 2 | 3 | MainWindow 4 | 5 | 6 | 7 | 0 8 | 0 9 | 768 10 | 557 11 | 12 | 13 | 14 | SoundAnalyser 15 | 16 | 17 | 18 | 19 | 20 | 10 21 | 10 22 | 741 23 | 481 24 | 25 | 26 | 27 | 28 | 29 | 30 | 10 31 | 500 32 | 244 33 | 26 34 | 35 | 36 | 37 | 38 | 39 | 40 | Start 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | Stop 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 0 64 | 0 65 | 768 66 | 19 67 | 68 | 69 | 70 | 71 | Action 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | Exit 80 | 81 | 82 | 83 | 84 | 85 | 86 | TestFFTDisplay 87 | QWidget 88 |
testfftdisplay.h
89 | 1 90 | 91 | 92 | 93 | 94 | 95 | actionExit 96 | triggered() 97 | MainWindow 98 | close() 99 | 100 | 101 | -1 102 | -1 103 | 104 | 105 | 383 106 | 276 107 | 108 | 109 | 110 | 111 | 112 | -------------------------------------------------------------------------------- /SoundAnalyser/soundanalyser.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/mguentner/libbeat/b805e24b6ce15eae3dc29694cf080b64710fc074/SoundAnalyser/soundanalyser.png -------------------------------------------------------------------------------- /SoundAnalyser/testfftdisplay.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "testfftdisplay.h" 19 | TestFFTDisplay::TestFFTDisplay(QWidget *parent) : 20 | QWidget(parent) 21 | { 22 | m_Controller = new libbeat::BeatController(0,4096,44100,192); 23 | //Setup two test frequencies: 600Hz and 12000Hz 24 | m_Controller->addCustomBeat(600); 25 | m_Controller->addCustomBeat(12000); 26 | //Draw when processed and analysed data is ready to be displayed 27 | connect(m_Controller,SIGNAL(processingDone()),this,SLOT(drawNewData())); 28 | //Connect some test slots to the Controller's signals 29 | connect(m_Controller,SIGNAL(beatDrum()),this,SLOT(processDrum())); 30 | connect(m_Controller,SIGNAL(beatSnare()),this,SLOT(processSnare())); 31 | connect(m_Controller,SIGNAL(beatCustom(QSet)),this,SLOT(processCustom(QSet))); 32 | } 33 | 34 | void TestFFTDisplay::paintEvent(QPaintEvent *) 35 | { 36 | QPainter myPainter(this); 37 | myPainter.setBrush(Qt::white); 38 | myPainter.drawRect(QRectF(0,0,width(),height())); 39 | if(m_Controller->getEnabled()) 40 | { 41 | myPainter.setPen(Qt::green); 42 | for(uint16_t i=0;i<4096;i++) 43 | { 44 | //Draw the function itself 45 | myPainter.drawLine(QPoint((double)i/2048*width(),height()-m_Controller->getFFT()->getMagnitude(i)/m_Controller->getFFT()->getMaxMagnitude()*height()),QPoint((double)i/2048*width(),width())); 46 | } 47 | uint16_t bands=m_Controller->getAnalyser()->getBands(); 48 | for(uint16_t i=0;igetAnalyser()->getBeat(i) == true) 52 | myPainter.setBrush(Qt::red); 53 | else 54 | myPainter.setBrush(Qt::NoBrush); 55 | //Draw the beat indicator for each subband 56 | QRectF beatRect(QPointF((double)i/bands*width(),0),QPoint((double)(i+1)/bands*width(),0.2*height())); 57 | myPainter.drawRect(beatRect); 58 | //Set colors for detection levels 59 | myPainter.setBrush(Qt::magenta); 60 | myPainter.setPen(Qt::NoPen); 61 | //Draw beat detection level 62 | myPainter.drawRect(QRectF(QPoint((double)i/bands*width(),(height()-m_Controller->getAnalyser()->getBand(i)->getCurrentMaximumRaw()/m_Controller->getFFT()->getMaxMagnitude()*height())),QSizeF(width()*0.005,width()*0.005))); 63 | } 64 | //Draw drum beat 65 | if(m_Controller->getAnalyser()->getDrumBeat()) 66 | { 67 | myPainter.setBrush(Qt::yellow); 68 | myPainter.drawEllipse(QPointF(width()*0.30,height()/2),width()*0.1,width()*0.1); 69 | } 70 | //Draw snare beat 71 | if(m_Controller->getAnalyser()->getSnareBeat()) 72 | { 73 | myPainter.setBrush(Qt::blue); 74 | myPainter.drawEllipse(QPointF(width()*0.70,height()/2),width()*0.1,width()*0.1); 75 | } 76 | //Draw volume frame 77 | myPainter.setBrush(Qt::NoBrush); 78 | myPainter.setPen(Qt::black); 79 | myPainter.drawRect(QRectF(0.89*width(), 0.92*height(), 0.07*width(), -0.52*height())); 80 | //Draw volume 81 | myPainter.setBrush(Qt::green); 82 | myPainter.setPen(Qt::black); 83 | myPainter.drawRect(QRectF(0.90*width(), 0.90*height(), 0.05*width(), (log(m_Controller->getBuffer()->average_pwr())/log(65536))*-0.50*height())); 84 | } 85 | } 86 | void TestFFTDisplay::drawNewData() 87 | { 88 | update(); 89 | } 90 | 91 | void TestFFTDisplay::start() 92 | { 93 | m_Controller->start(); 94 | } 95 | void TestFFTDisplay::stop() 96 | { 97 | m_Controller->stop(); 98 | } 99 | void TestFFTDisplay::processDrum() 100 | { 101 | qDebug("Drum beat.\n"); 102 | } 103 | void TestFFTDisplay::processSnare() 104 | { 105 | qDebug("Snare beat.\n"); 106 | } 107 | void TestFFTDisplay::processCustom(QSet myBeats) 108 | { 109 | QSetIterator i(myBeats); 110 | while (i.hasNext()) 111 | { 112 | qDebug("Custom beat at %d Hz\n",i.next()); 113 | } 114 | } 115 | void TestFFTDisplay::windowFunctionChanged(const QString &arg1) 116 | { 117 | if (arg1 == "No Window") 118 | m_Controller->getFFT()->setWindowFunction(libbeat::NO_WINDOW); 119 | if (arg1 == "Hanning") 120 | m_Controller->getFFT()->setWindowFunction(libbeat::HANNING); 121 | if (arg1 == "Blackman") 122 | m_Controller->getFFT()->setWindowFunction(libbeat::BLACKMAN); 123 | } 124 | -------------------------------------------------------------------------------- /SoundAnalyser/testfftdisplay.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef TESTFFTDISPLAY_H 19 | #define TESTFFTDISPLAY_H 20 | 21 | #include 22 | #include 23 | #include "cmath" 24 | #include "../src/beatcontroller.h" 25 | class TestFFTDisplay : public QWidget 26 | { 27 | Q_OBJECT 28 | public: 29 | explicit TestFFTDisplay(QWidget *parent = 0); 30 | 31 | public slots: 32 | void start(); 33 | void stop(); 34 | 35 | private: 36 | libbeat::BeatController *m_Controller; 37 | 38 | protected: 39 | void paintEvent(QPaintEvent *); 40 | 41 | private slots: 42 | void drawNewData(); 43 | void processSnare(); 44 | void processDrum(); 45 | void processCustom(QSet myBeats); 46 | void windowFunctionChanged(const QString &arg1); 47 | }; 48 | 49 | #endif // TESTFFTDISPLAY_H 50 | -------------------------------------------------------------------------------- /libbeat.pro: -------------------------------------------------------------------------------- 1 | TEMPLATE = subdirs 2 | 3 | SUBDIRS += src 4 | SUBDIRS += SoundAnalyser 5 | 6 | -------------------------------------------------------------------------------- /src/alsarecorder.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "alsarecorder.h" 19 | 20 | namespace libbeat 21 | { 22 | 23 | AlsaRecorder::AlsaRecorder(uint32_t samplerate, uint8_t channels, SoundBuffer *mySoundBuffer,uint16_t recordsize) 24 | { 25 | this->m_sampleSize=samplerate; 26 | this->m_SoundBuffer=mySoundBuffer; 27 | this->m_channels=channels; 28 | this->m_recordSize=recordsize; 29 | m_captureEnabled=false; 30 | m_signal = new int16_t[recordsize*channels]; 31 | } 32 | 33 | AlsaRecorder::~AlsaRecorder() 34 | { 35 | delete[] m_signal; 36 | m_captureEnabled=false; 37 | //Wait until run(); has finished 38 | wait(); 39 | } 40 | void AlsaRecorder::stop() 41 | { 42 | m_captureEnabled=false; 43 | } 44 | bool AlsaRecorder::initSound() 45 | { 46 | snd_pcm_hw_params_t *hw_params; 47 | char pcm_name[]="default"; 48 | int err; 49 | 50 | 51 | if ((err = snd_pcm_open (&m_captureHandle, pcm_name, SND_PCM_STREAM_CAPTURE, 0)) < 0) 52 | { 53 | qWarning("cannot open audio device (%s)\n", 54 | snd_strerror (err)); 55 | return false; 56 | } 57 | if ((err = snd_pcm_hw_params_malloc (&hw_params)) < 0) 58 | { 59 | qWarning("cannot allocate hardware parameter structure (%s)\n", 60 | snd_strerror (err)); 61 | return false; 62 | } 63 | if ((err = snd_pcm_hw_params_any (m_captureHandle, hw_params)) < 0) 64 | { 65 | qWarning("cannot initialize hardware parameter structure (%s)\n", 66 | snd_strerror (err)); 67 | return false; 68 | } 69 | if ((err = snd_pcm_hw_params_set_access (m_captureHandle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) 70 | { 71 | qWarning("cannot set access type (%s)\n", 72 | snd_strerror (err)); 73 | return false; 74 | } 75 | if ((err = snd_pcm_hw_params_set_format (m_captureHandle, hw_params, SND_PCM_FORMAT_S16_LE)) < 0) 76 | { 77 | qWarning("cannot set sample format (%s)\n", 78 | snd_strerror (err)); 79 | return false; 80 | } 81 | if ((err = snd_pcm_hw_params_set_rate_near (m_captureHandle, hw_params, (unsigned int *) &m_sampleSize, 0)) < 0) 82 | { 83 | qWarning("cannot set sample rate (%s)\n", 84 | snd_strerror (err)); 85 | return false; 86 | } 87 | if ((err = snd_pcm_hw_params_set_channels (m_captureHandle, hw_params, m_channels)) < 0) 88 | { 89 | qWarning("cannot set channel count (%s)\n", 90 | snd_strerror (err)); 91 | return false; 92 | } 93 | if ((err = snd_pcm_hw_params (m_captureHandle, hw_params)) < 0) 94 | { 95 | qWarning("cannot set parameters (%s)\n", 96 | snd_strerror (err)); 97 | return false; 98 | } 99 | snd_pcm_hw_params_free (hw_params); 100 | return true; 101 | } 102 | void AlsaRecorder::closeSound() 103 | { 104 | snd_pcm_close (m_captureHandle); 105 | } 106 | void AlsaRecorder::run() 107 | { 108 | int err; 109 | //stop will set this to false 110 | m_captureEnabled=true; 111 | if(initSound()) 112 | { 113 | while(m_captureEnabled) 114 | { 115 | if ((err = snd_pcm_readi (m_captureHandle, m_signal, m_recordSize)) != m_recordSize) 116 | { 117 | if ((err = snd_pcm_prepare (m_captureHandle)) < 0) 118 | { 119 | qWarning("cannot prepare audio interface for use (%s)\n", 120 | snd_strerror (err)); 121 | 122 | } 123 | } 124 | //Write data to Buffer 125 | for(uint16_t i=0;iwrite(i/m_channels,(int16_t)sum/m_channels); 131 | } 132 | //Emit signal and notify connected modules that new data is ready for processing 133 | emit newDataIsReady(); 134 | } 135 | } 136 | closeSound(); 137 | } 138 | } //namespace libbeat 139 | -------------------------------------------------------------------------------- /src/alsarecorder.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef ALSARECORDER_H 19 | #define ALSARECORDER_H 20 | 21 | #include 22 | #include 23 | #include 24 | #include 25 | #include "soundrecorder.h" 26 | #include "soundbuffer.h" 27 | 28 | namespace libbeat 29 | { 30 | 31 | class AlsaRecorder : public SoundRecorder 32 | { 33 | Q_OBJECT 34 | 35 | public: 36 | AlsaRecorder(uint32_t m_sampleSize,uint8_t m_channels,SoundBuffer *m_SoundBuffer,uint16_t m_recordSize); 37 | virtual ~AlsaRecorder(); 38 | virtual void run(); 39 | virtual void stop(); 40 | //Variables 41 | private: 42 | snd_pcm_t *m_captureHandle; 43 | uint16_t m_recordSize; 44 | uint32_t m_sampleSize; 45 | SoundBuffer *m_SoundBuffer; 46 | bool m_captureEnabled; 47 | uint8_t m_channels; 48 | int16_t *m_signal; 49 | //Methods 50 | private: 51 | bool initSound(); 52 | void closeSound(); 53 | }; 54 | } 55 | #endif // ALSARECORDER_H 56 | -------------------------------------------------------------------------------- /src/beatanalyser.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "beatanalyser.h" 19 | namespace libbeat 20 | { 21 | 22 | 23 | BeatAnalyser::BeatAnalyser(uint16_t num_bands, uint32_t samplerate, uint16_t recordsize) 24 | { 25 | this->m_bandCount=num_bands; 26 | this->m_sampleRate=samplerate; 27 | this->m_recordSize=recordsize; 28 | m_SubBands = new QVector; 29 | for(uint16_t i=0;iappend(tmp); 34 | } 35 | m_beats = new QVector (num_bands,false); 36 | } 37 | BeatAnalyser::~BeatAnalyser() 38 | { 39 | delete m_SubBands; 40 | delete m_beats; 41 | } 42 | void BeatAnalyser::processData() 43 | { 44 | uint16_t freq_per_band=m_recordSize/2/m_bandCount; 45 | m_beats->fill(false); 46 | for(uint16_t i=0;igetMagnitude(i*freq_per_band+j); 52 | } 53 | sum/=freq_per_band; 54 | if(m_SubBands->at(i)->average()*1.05 < sum) 55 | { 56 | if(m_SubBands->at(i)->getCurrentMaximum() < sum) 57 | { 58 | if(m_SubBands->at(i)->getAllTimeMaximium()*0.5 < sum) 59 | { 60 | m_beats->replace(i,true); 61 | } 62 | } 63 | } 64 | m_SubBands->at(i)->log(sum); 65 | 66 | } 67 | } 68 | bool BeatAnalyser::getBeat(uint16_t pos) 69 | { 70 | if(pos < m_bandCount) 71 | return m_beats->at(pos); 72 | else 73 | return false; 74 | } 75 | bool BeatAnalyser::getBeatFrequency(uint32_t frequency) 76 | { 77 | uint16_t freq_per_band=m_sampleRate/m_bandCount/2; 78 | return m_beats->at((int)frequency/freq_per_band); 79 | } 80 | bool BeatAnalyser::getDrumBeat() 81 | { 82 | /*We want to detect beats from 30Hz up to 200Hz*/ 83 | bool tmp=false; 84 | uint16_t freq_per_band=m_sampleRate/m_bandCount/2; 85 | uint32_t low_limit=30/freq_per_band; 86 | uint32_t high_limit=200/freq_per_band; 87 | if(high_limit == 0) 88 | high_limit=1; /*If we have few bands, just take the first one*/ 89 | 90 | for(uint16_t i=low_limit;iat(i); 92 | return tmp; 93 | } 94 | bool BeatAnalyser::getSnareBeat() 95 | { 96 | /*We want to detect beats from 1500Hz up to 2500Hz - this of course will return a beat more often due to the broad spectrum*/ 97 | bool tmp=false; 98 | uint16_t freq_per_band=m_sampleRate/m_bandCount/2; 99 | uint32_t low_limit=1500/freq_per_band; 100 | uint32_t high_limit=2000/freq_per_band; 101 | for(uint16_t i=low_limit;iat(i); 103 | return tmp; 104 | } 105 | SubBand* BeatAnalyser::getBand(uint16_t pos) 106 | { 107 | if(pos < m_bandCount) 108 | return m_SubBands->at(pos); 109 | else 110 | return NULL; 111 | } 112 | } //namespace libbeat 113 | -------------------------------------------------------------------------------- /src/beatanalyser.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef BEATANALYSER_H 19 | #define BEATANALYSER_H 20 | #include 21 | #include 22 | #include "subband.h" 23 | #include "inttypes.h" 24 | #include "fft.h" 25 | #include "alsarecorder.h" 26 | 27 | namespace libbeat 28 | { 29 | 30 | class BeatAnalyser 31 | { 32 | public: 33 | /*! 34 | @param m_bandCount in how many subbands the FFT result should be divided 35 | @param m_sampleRate 36 | @param m_recordSize how many samples you want to analyse 37 | */ 38 | BeatAnalyser(uint16_t m_bandCount,uint32_t m_sampleRate, uint16_t m_recordSize); 39 | ~BeatAnalyser(); 40 | /*! 41 | sets the FFT object address 42 | @param *value the pointer to the object 43 | */ 44 | void setFFT(FFT *value){m_FFT=value;} 45 | /*! 46 | processes new data 47 | */ 48 | void processData(); 49 | /*! 50 | returns the number of bands 51 | @return number of bands 52 | */ 53 | uint16_t getBands(){return m_bandCount;} 54 | /*! 55 | determine whether a beat has been detected in a band 56 | @param pos the band (0-(mbandCount-1)) 57 | @return true if a beat has been detected, otherwise false 58 | */ 59 | bool getBeat(uint16_t pos); 60 | /*! 61 | determine whether a beat has been detected in the corresponding band of a given frequency 62 | @param frequency 63 | @return true if a beat has been detected, otherwise false 64 | */ 65 | bool getBeatFrequency(uint32_t frequency); 66 | /*! 67 | determine whether a beat has been detected for the drum (50Hz -> 200Hz) 68 | @return true if a beat has been detected, otherwise false 69 | */ 70 | bool getDrumBeat(); 71 | /*! 72 | determine whether a beat has been detected for the snare (1500Hz -> 2000Hz) 73 | @return true if a beat has been detected, otherwise false 74 | */ 75 | bool getSnareBeat(); 76 | /*! 77 | get raw access to a certain band 78 | @param pos the position of the band 79 | @return returns a pointer to the band, returns NULL if pos is out of range 80 | */ 81 | SubBand* getBand(uint16_t pos); 82 | 83 | private: 84 | uint16_t m_bandCount; 85 | uint32_t m_sampleRate; 86 | uint16_t m_recordSize; 87 | FFT *m_FFT; 88 | QVector *m_SubBands; 89 | QVector *m_beats; 90 | }; 91 | } 92 | 93 | #endif // BEATANALYSER_H 94 | -------------------------------------------------------------------------------- /src/beatcontroller.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "beatcontroller.h" 19 | 20 | namespace libbeat 21 | { 22 | 23 | BeatController::BeatController(QObject *parent, uint16_t recordSize, uint32_t sampleRate, uint16_t m_bandCount) : QObject(parent) 24 | { 25 | m_Buffer = new SoundBuffer(recordSize); 26 | m_Analyser = new BeatAnalyser(m_bandCount,sampleRate,recordSize); 27 | #ifdef USE_ALSA 28 | dynamic_cast(m_Recorder); 29 | m_Recorder = new AlsaRecorder(sampleRate,2,m_Buffer,recordSize); 30 | #endif 31 | #ifdef USE_PULSE 32 | dynamic_cast(m_Recorder); 33 | m_Recorder = new PulseRecorder(sampleRate,2,m_Buffer,recordSize); 34 | #endif 35 | m_FFT = new FFT(recordSize); 36 | m_FFT->setSoundBuffer(m_Buffer); 37 | m_Analyser->setFFT(m_FFT); 38 | m_enabled=false; 39 | } 40 | BeatController::~BeatController() 41 | { 42 | delete m_FFT; 43 | delete m_Recorder; 44 | delete m_Buffer; 45 | delete m_Analyser; 46 | } 47 | void BeatController::start() 48 | { 49 | if(!m_enabled) 50 | { 51 | m_Recorder->start(); 52 | m_enabled=true; 53 | //Connect SoundRecorder::newDataIsReady to processNewData() 54 | connect(m_Recorder,SIGNAL(newDataIsReady()),this, SLOT(processNewData())); 55 | } 56 | } 57 | 58 | void BeatController::stop() 59 | { 60 | if(m_enabled) 61 | { 62 | m_Recorder->stop(); 63 | m_enabled=false; 64 | } 65 | } 66 | bool BeatController::getEnabled() 67 | { 68 | return m_enabled; 69 | } 70 | 71 | void BeatController::processNewData() 72 | { 73 | if(m_enabled) 74 | { 75 | m_FFT->processData(); 76 | m_Analyser->processData(); 77 | emit processingDone(); 78 | if(m_Analyser->getDrumBeat()) 79 | emit beatDrum(); 80 | if(m_Analyser->getSnareBeat()) 81 | emit beatSnare(); 82 | //Check for a beat for every frequency in our list 83 | QSet myBeats; 84 | QSetIterator i(m_customBeats); 85 | while(i.hasNext()) 86 | { 87 | if(m_Analyser->getBeatFrequency(i.peekNext())) 88 | myBeats.insert(i.peekNext()); 89 | i.next(); 90 | } 91 | if(!myBeats.empty()) 92 | emit beatCustom(myBeats); 93 | } 94 | } 95 | } //namespace libbeat 96 | -------------------------------------------------------------------------------- /src/beatcontroller.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef CONTROLLER_H 19 | #define CONTROLLER_H 20 | #define USE_PULSE 21 | 22 | #ifdef USE_ALSA 23 | #include "alsarecorder.h" 24 | #endif 25 | #ifdef USE_PULSE 26 | #include "pulserecorder.h" 27 | #endif 28 | #include "fft.h" 29 | #include "soundbuffer.h" 30 | #include "beatanalyser.h" 31 | 32 | #include 33 | #include 34 | #include 35 | #include 36 | 37 | namespace libbeat 38 | { 39 | 40 | class BeatController : public QObject 41 | { 42 | Q_OBJECT 43 | public: 44 | /*! 45 | creates a controller for all other components of libbeat. 46 | @param m_bandCount in how many subbands the input signal should be divided 47 | @param recordSize how many samples you want to record and analyse at one go (4096 is a good value for 44100 Hz sampleRate) 48 | @param sampleRate 49 | @param *parent 50 | */ 51 | explicit BeatController (QObject *parent = 0, uint16_t recordSize = 0, uint32_t sampleRate = 0, uint16_t m_bandCount = 0); 52 | ~BeatController(); 53 | /*! 54 | provides raw access to m_FFT 55 | @returns a pointer to m_FFT 56 | */ 57 | FFT* getFFT(){return m_FFT;} 58 | /*! 59 | provides raw access to m_Analyser 60 | @returns a pointer to m_Analyser 61 | */ 62 | BeatAnalyser* getAnalyser(){return m_Analyser;} 63 | /*! 64 | provides raw access to m_Buffer 65 | @returns a pointer to m_Buffer 66 | */ 67 | SoundBuffer* getBuffer(){return m_Buffer;} 68 | /*! 69 | starts recording and processing 70 | */ 71 | void start(); 72 | /*! 73 | stops recording and processing 74 | */ 75 | void stop(); 76 | /*! 77 | get the current state of the controller 78 | @returns true if the controller is active, false if not 79 | */ 80 | bool getEnabled(); 81 | /*! 82 | adds a custom frequency for which a signal will be set up 83 | @param value the target frequency to be added 84 | */ 85 | void addCustomBeat(uint16_t value){m_customBeats.insert(value);} 86 | /*! 87 | removes a custom frequency 88 | @param value the target frequency to be removed 89 | */ 90 | void removeCustomBeat(uint16_t value){m_customBeats.remove(value);} 91 | private: 92 | /*! 93 | the SoundRecorder connected to this BeatController 94 | */ 95 | SoundRecorder *m_Recorder; 96 | FFT *m_FFT; 97 | SoundBuffer *m_Buffer; 98 | BeatAnalyser *m_Analyser; 99 | bool m_enabled; 100 | /*! this QSet contains all custom beats. */ 101 | QSet m_customBeats; 102 | 103 | private slots: 104 | /*! 105 | the Controller will start processing when this slot is being called 106 | */ 107 | void processNewData(); 108 | 109 | signals: 110 | /*! 111 | the Controller emits this signal when new data is ready to be displayed 112 | */ 113 | void processingDone(); 114 | /*! 115 | the Controller emits this signal when a drum beat has been detected 116 | */ 117 | void beatDrum(); 118 | /*! 119 | the Controller emits this signal when a snare beat has been detected 120 | */ 121 | void beatSnare(); 122 | /*! 123 | the Controller emits this signal when a custom beat has been detected. 124 | ONLY the beats detected will be in the QSet 125 | */ 126 | void beatCustom(QSet beats); 127 | 128 | }; 129 | } 130 | 131 | #endif // CONTROLLER_H 132 | -------------------------------------------------------------------------------- /src/fft.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "fft.h" 19 | 20 | namespace libbeat 21 | { 22 | 23 | 24 | FFT::FFT(uint16_t size=0) 25 | { 26 | this->m_size=size; 27 | m_magnitude = new double[size/2]; 28 | m_maxMagnitude=0; 29 | /*We should use fftw_malloc instead of new since fftw_malloc aligns the memory for optimal speed*/ 30 | m_outputSignal = (fftw_complex*) fftw_malloc(sizeof(fftw_complex) * size); 31 | m_inputSignal = new double[size]; 32 | m_SoundBuffer = NULL; 33 | m_windowFunction = BLACKMAN; 34 | } 35 | FFT::~FFT() 36 | { 37 | delete [] m_inputSignal; 38 | delete [] m_magnitude; 39 | fftw_free(m_outputSignal); 40 | } 41 | void FFT::processData() 42 | { 43 | if(m_SoundBuffer == NULL) 44 | { 45 | qErrnoWarning("libbeat: No Soundbuffer has been set!"); 46 | return; 47 | } 48 | //This has to happen prior to any initialisation of the input array 49 | fftw_plan plan_forward; 50 | plan_forward = fftw_plan_dft_r2c_1d(m_size, m_inputSignal, m_outputSignal , 0); 51 | //fill our array with data and apply windows if needed 52 | switch (m_windowFunction) 53 | { 54 | case(NO_WINDOW): 55 | for(uint16_t i=0; iread(i); 58 | } 59 | break; 60 | case(HANNING): 61 | for(uint16_t i=0; iread(i) * 0.5*(1.00-cos((2*M_PI*i)/(m_size-1))); 64 | } 65 | break; 66 | case(BLACKMAN): 67 | for(uint16_t i=0; iread(i) * a0-a1*cos((2*M_PI*i)/(m_size-1))+a2*cos((4*M_PI*i)/(m_size-1)); 73 | } 74 | break; 75 | } 76 | fftw_execute(plan_forward); 77 | fftw_destroy_plan(plan_forward); 78 | //Calculate Magnitude 79 | #ifdef CLEAR_NOISE 80 | //We delete some values since these will ruin our output 81 | m_outputSignal[0][0]=0; 82 | m_outputSignal[0][1]=0; 83 | m_outputSignal[1][0]=0; 84 | m_outputSignal[1][1]=0; 85 | #endif 86 | for(uint16_t i=0;i m_maxMagnitude) 90 | m_maxMagnitude=m_magnitude[i]; 91 | } 92 | } 93 | double FFT::getElement_i(uint16_t pos) 94 | { 95 | if(pos < m_size) 96 | return m_outputSignal[pos][1]; 97 | else 98 | return 0; 99 | } 100 | double FFT::getElement_r(uint16_t pos) 101 | { 102 | if(pos < m_size) 103 | return m_outputSignal[pos][0]; 104 | else 105 | return 0; 106 | } 107 | double FFT::getMagnitude(uint16_t pos) 108 | { 109 | if(pos < m_size/2) 110 | return m_magnitude[pos]; 111 | else 112 | return 0; 113 | } 114 | double FFT::getMaxMagnitude() 115 | { 116 | return m_maxMagnitude; 117 | } 118 | 119 | void FFT::setWindowFunction(libbeat::WindowFunction windowFunction) 120 | { 121 | m_windowFunction = windowFunction; 122 | } 123 | 124 | WindowFunction FFT::getWindowFunction() 125 | { 126 | return m_windowFunction; 127 | } 128 | } //namespace libbeat 129 | -------------------------------------------------------------------------------- /src/fft.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef FFT_H 19 | #define FFT_H 20 | #include 21 | #include 22 | #include 23 | #include 24 | #include "soundbuffer.h" 25 | /*! \def CLEAR_NOISE 26 | the FFT results can be misleading for the frequency band 0-30Hz) - this define will just set this to 0 27 | */ 28 | #define CLEAR_NOISE 29 | 30 | namespace libbeat 31 | { 32 | 33 | enum WindowFunction { 34 | NO_WINDOW, /*! no window ( http://en.wikipedia.org/wiki/Window_function ) will be used when filling the input array */ 35 | BLACKMAN, /*! the Blackman window will be used when filling the input array ( http://en.wikipedia.org/wiki/Window_function#Blackman_windows ) */ 36 | HANNING /*! the Hanning window will be used when filling the input array ( http://en.wikipedia.org/wiki/Window_function#Hann_window ) */ 37 | }; 38 | 39 | class FFT 40 | { 41 | public: 42 | /*! 43 | creates a FFT of a certain size 44 | @param m_size 45 | */ 46 | FFT(uint16_t m_size); 47 | ~FFT(); 48 | /*! 49 | sets the address of m_SoundBuffer 50 | @param *value 51 | */ 52 | void setSoundBuffer(SoundBuffer *value){m_SoundBuffer=value;} 53 | /*! 54 | starts processing of new data if m_SoundBuffer is not NULL 55 | */ 56 | void processData(); 57 | /*! 58 | provides access to the real part of the processed signal 59 | @param pos the position in the FFT, valid input is 0-(m_size-1) 60 | @return the value at the position. if the position is out of range, return will be 0 61 | */ 62 | double getElement_r(uint16_t pos); 63 | /*! 64 | provides access to the imaginary part of the processed signal 65 | @param pos the processed signal at pos, valid input is 0-(m_size-1) 66 | @return the value at pos. if pos is out of range, return will be 0 67 | */ 68 | double getElement_i(uint16_t pos); 69 | /*! 70 | provides access to the magnitude of the signal 71 | @param pos the processed signal at pos, valid input is 0-(m_size/2) 72 | @return the value at the pos. if pos is out of range, return will be 0 73 | */ 74 | double getMagnitude(uint16_t pos); 75 | /*! 76 | provides the highest magnitude of the whole signal. This can be used for scaling graphs 77 | @return highest magnitude 78 | */ 79 | double getMaxMagnitude(); 80 | 81 | /*! 82 | sets the windowFunction 83 | @param windowFunction the WindowFunction to be used when processing the input data 84 | @see WindowFunction 85 | */ 86 | void setWindowFunction(WindowFunction windowFunction); 87 | 88 | /*! 89 | @return the current windowFunction 90 | @see WindowFunction 91 | */ 92 | WindowFunction getWindowFunction(); 93 | 94 | 95 | private: 96 | /*! the SoundBuffer from where FFT gets new data */ 97 | SoundBuffer *m_SoundBuffer; 98 | /*! the size of the input signal */ 99 | uint16_t m_size; 100 | /*! the input signal */ 101 | double *m_inputSignal; 102 | /*! an array where the magnitude will be stored */ 103 | double *m_magnitude; 104 | /*! the maximum magnitude inside m_magnitude */ 105 | double m_maxMagnitude; 106 | /*! the results of fftw */ 107 | fftw_complex *m_outputSignal; 108 | WindowFunction m_windowFunction; 109 | }; 110 | } 111 | 112 | #endif // FFT_H 113 | -------------------------------------------------------------------------------- /src/pulserecorder.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "pulserecorder.h" 19 | 20 | namespace libbeat 21 | { 22 | 23 | 24 | PulseRecorder::PulseRecorder(uint32_t samplerate,uint8_t channels,SoundBuffer *mySoundBuffer,uint16_t recordsize) 25 | { 26 | this->m_sampleRate=samplerate; 27 | this->m_SoundBuffer=mySoundBuffer; 28 | this->m_channels=channels; 29 | this->m_recordSize=recordsize; 30 | m_captureEnabled=false; 31 | m_signal = new int16_t[recordsize*channels]; 32 | } 33 | PulseRecorder::~PulseRecorder() 34 | { 35 | delete[] m_signal; 36 | m_captureEnabled=false; 37 | //Wait until run(); has finished 38 | wait(); 39 | } 40 | void PulseRecorder::stop() 41 | { 42 | m_captureEnabled=false; 43 | } 44 | bool PulseRecorder::initSound() 45 | { 46 | m_ss.format= PA_SAMPLE_S16LE; 47 | m_ss.channels=m_channels; 48 | m_ss.rate=m_sampleRate; 49 | m_s = pa_simple_new(NULL, "libbeat",PA_STREAM_RECORD,NULL,"Sound Processing",&m_ss,NULL,NULL,NULL); 50 | if (m_s != NULL) 51 | return true; //No Error 52 | else 53 | return false; //Error 54 | } 55 | void PulseRecorder::closeSound() 56 | { 57 | pa_simple_free(m_s); 58 | } 59 | void PulseRecorder::run() 60 | { 61 | if(initSound()) 62 | { 63 | m_captureEnabled=true; 64 | int error; 65 | while(m_captureEnabled) 66 | { 67 | if (pa_simple_read(m_s,m_signal,m_recordSize*m_channels*2,&error) < 0) 68 | { 69 | qWarning("pa_simple_read() failed: %s\n", pa_strerror(error)); 70 | m_captureEnabled=false; 71 | } 72 | //Write data to Buffer 73 | for(uint16_t i=0;iwrite(i/m_channels,(int16_t)sum/m_channels); 79 | } 80 | //Emit signal and notify connected modules that new data is ready for processing 81 | emit newDataIsReady(); 82 | } 83 | } 84 | m_captureEnabled=false; 85 | closeSound(); 86 | } 87 | } //namespace libbeat 88 | -------------------------------------------------------------------------------- /src/pulserecorder.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef PULSERECORDER_H 19 | #define PULSERECORDER_H 20 | #include 21 | #include 22 | #include "soundrecorder.h" 23 | #include "soundbuffer.h" 24 | #include 25 | #include 26 | 27 | namespace libbeat 28 | { 29 | 30 | class PulseRecorder : public SoundRecorder 31 | { 32 | Q_OBJECT 33 | 34 | public: 35 | PulseRecorder(uint32_t m_sampleRate,uint8_t m_channels,SoundBuffer *m_SoundBuffer,uint16_t m_recordSize); 36 | virtual ~PulseRecorder(); 37 | virtual void run(); 38 | virtual void stop(); 39 | //Variables 40 | private: 41 | pa_simple *m_s; 42 | pa_sample_spec m_ss; 43 | SoundBuffer *m_SoundBuffer; 44 | int16_t *m_signal; 45 | uint16_t m_recordSize; 46 | uint32_t m_sampleRate; 47 | bool m_captureEnabled; 48 | uint8_t m_channels; 49 | //Methods 50 | private: 51 | bool initSound(); 52 | void closeSound(); 53 | }; 54 | } 55 | #endif // PULSERECORDER_H 56 | -------------------------------------------------------------------------------- /src/soundbuffer.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "soundbuffer.h" 19 | 20 | namespace libbeat 21 | { 22 | 23 | SoundBuffer::SoundBuffer(uint16_t size) 24 | { 25 | this->m_size=size; 26 | m_Buffer.resize(size); 27 | } 28 | 29 | int16_t SoundBuffer::average() 30 | { 31 | int32_t sum=0; 32 | for(uint16_t i=0;i 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef SOUNDBUFFER_H 19 | #define SOUNDBUFFER_H 20 | #include 21 | #include 22 | 23 | namespace libbeat 24 | { 25 | /*! 26 | Simple storage class for signed 16-bit samples 27 | */ 28 | class SoundBuffer 29 | { 30 | 31 | public: 32 | /*! 33 | @param m_size how many samples SoundBuffer should store 34 | */ 35 | SoundBuffer(uint16_t m_size=0); 36 | /*! returns the average value of the SoundBuffer 37 | @return average value 38 | */ 39 | int16_t average(); 40 | /*! returns the average power of the SoundBuffer (e.g the volume) 41 | @return average power 42 | */ 43 | uint16_t average_pwr(); 44 | /*! 45 | write value to pos 46 | @param value the value 47 | @param pos the position 48 | @return true if successful, false if not 49 | */ 50 | bool write(uint16_t pos, int16_t value); 51 | /*! 52 | get a certain positon 53 | @param pos the position 54 | @return the value at pos 55 | */ 56 | int16_t read(uint16_t pos); 57 | 58 | private: 59 | uint16_t m_size; 60 | QVector m_Buffer; 61 | 62 | }; 63 | } 64 | #endif // SOUNDBUFFER_H 65 | -------------------------------------------------------------------------------- /src/soundrecorder.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "soundrecorder.h" 19 | 20 | namespace libbeat 21 | { 22 | 23 | SoundRecorder::SoundRecorder() 24 | { 25 | } 26 | 27 | SoundRecorder::~SoundRecorder() 28 | { 29 | } 30 | 31 | } //namespace libbeat 32 | -------------------------------------------------------------------------------- /src/soundrecorder.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef SOUNDRECORDER_H 19 | #define SOUNDRECORDER_H 20 | #include 21 | #include 22 | 23 | namespace libbeat 24 | { 25 | /*! 26 | abstract SoundRecorder 27 | */ 28 | class SoundRecorder : public QThread 29 | { 30 | Q_OBJECT 31 | 32 | public: 33 | SoundRecorder(); 34 | virtual ~SoundRecorder(); 35 | virtual void stop() = 0; 36 | 37 | signals: 38 | /*! 39 | This signal needs to be emitted once all samples have been recorded. The BeatController will connect to this signal and then trigger the Analyser 40 | */ 41 | void newDataIsReady(); 42 | 43 | }; 44 | } 45 | #endif // SOUNDRECORDER_H 46 | -------------------------------------------------------------------------------- /src/src.pro: -------------------------------------------------------------------------------- 1 | TEMPLATE = lib 2 | LANGUAGE = C++ 3 | TARGET = beat 4 | 5 | SOURCES += alsarecorder.cpp \ 6 | subband.cpp \ 7 | soundrecorder.cpp \ 8 | soundbuffer.cpp \ 9 | pulserecorder.cpp \ 10 | fft.cpp \ 11 | beatcontroller.cpp \ 12 | beatanalyser.cpp 13 | 14 | HEADERS += subband.h \ 15 | soundrecorder.h \ 16 | soundbuffer.h \ 17 | pulserecorder.h \ 18 | fft.h \ 19 | beatcontroller.h \ 20 | beatanalyser.h \ 21 | alsarecorder.h 22 | 23 | LIBS += -lasound -lfftw3 -lpulse-simple -lpulse 24 | target.path = /usr/lib 25 | INSTALLS += target 26 | -------------------------------------------------------------------------------- /src/subband.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "subband.h" 19 | 20 | namespace libbeat 21 | { 22 | 23 | SubBand::SubBand(uint16_t size,double dropFactor) 24 | { 25 | this->m_size=size; 26 | this->m_dropFactor=dropFactor; 27 | m_allTimeMaximum=0; 28 | m_currentMaximum=0; 29 | logCounter=0; 30 | } 31 | void SubBand::log(double value) 32 | { 33 | if(value > m_allTimeMaximum) 34 | m_allTimeMaximum=value; 35 | if(value > m_currentMaximum) 36 | m_currentMaximum=value; 37 | if(++logCounter == 1000) 38 | { 39 | m_allTimeMaximum=(average()+m_allTimeMaximum)/2; 40 | logCounter=0; 41 | } 42 | //Log our new value 43 | m_history.prepend(value); 44 | //Delete the oldest record 45 | if(m_history.size() > m_size) 46 | m_history.removeLast(); 47 | //else: We are still filling our list. this should only happend during the first second of recording 48 | } 49 | double SubBand::average() 50 | { 51 | double sum=0; 52 | foreach (const double &entry, m_history) 53 | sum+=entry; 54 | return sum/m_history.size(); 55 | } 56 | double SubBand::getCurrentMaximum() 57 | { 58 | //With every call of this method we gradually lower the maximum to quickly adapt to changes in the input 59 | m_currentMaximum*=m_dropFactor; 60 | return m_currentMaximum; 61 | } 62 | double SubBand::getCurrentMaximumRaw() 63 | { 64 | //This function is for display purpose only. No recalibration will be performed 65 | return m_currentMaximum; 66 | } 67 | double SubBand::getAllTimeMaximium() 68 | { 69 | return m_allTimeMaximum; 70 | } 71 | void SubBand::resetMaximum() 72 | { 73 | m_allTimeMaximum=0; 74 | m_currentMaximum=0; 75 | } 76 | } //libbeat 77 | -------------------------------------------------------------------------------- /src/subband.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of libbeat - a lightweight beat detection library 3 | Copyright (c) 2011 by Maximilian Güntner 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef SUBBAND_H 19 | #define SUBBAND_H 20 | //Qt has nothing similar to so we simply use a 21 | #include 22 | #include 23 | 24 | namespace libbeat 25 | { 26 | 27 | class SubBand 28 | { 29 | public: 30 | /*! 31 | @param m_size how many records SubBand needs to store (e.g. setting this to 4*samplerate/recordsize will result in 4 seconds of history) 32 | @param m_dropFactor (e.g. setting this to pow(0.5,(1/((double)samplerate/recordsize))) will result in 50% decrease after 2 seconds) 33 | */ 34 | SubBand(uint16_t m_size=0,double m_dropFactor=0.985); 35 | /*! 36 | log a new record 37 | @param value the record to be logged - the oldest record will be removed 38 | */ 39 | void log(double value); 40 | /*! 41 | returns the average magnitude for this SubBand 42 | @return the average magnitude 43 | */ 44 | double average(); 45 | /*! 46 | returns the currently highest magnitude. With each call the magnitude will be 47 | multiplied by m_dropFactor and therefore leading to a recalibration (gently reducing the magnitude) 48 | @return the highest magnitude so far 49 | */ 50 | double getCurrentMaximum(); 51 | /*! 52 | returns the currently highest magnitude without touching it. This can be used for displaying the current threshold. 53 | @return the currently highest magnitude so far 54 | */ 55 | double getCurrentMaximumRaw(); 56 | /*! 57 | returns the highest magnitude so far without touching it. 58 | @return the highest magnitued so far 59 | */ 60 | double getAllTimeMaximium(); 61 | 62 | /*! 63 | resets the maximum 64 | */ 65 | void resetMaximum(); 66 | 67 | private: 68 | QList m_history; 69 | uint16_t m_size; 70 | double m_allTimeMaximum; 71 | double m_currentMaximum; 72 | double m_dropFactor; 73 | uint16_t logCounter; 74 | }; 75 | } 76 | #endif // SUBBAND_H 77 | --------------------------------------------------------------------------------