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Diffstat (limited to 'examples/multimedia/audio/audioinput/audioinput.h')
| -rw-r--r-- | examples/multimedia/audio/audioinput/audioinput.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/examples/multimedia/audio/audioinput/audioinput.h b/examples/multimedia/audio/audioinput/audioinput.h new file mode 100644 index 000000000..3a6b3566c --- /dev/null +++ b/examples/multimedia/audio/audioinput/audioinput.h @@ -0,0 +1,144 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QPixmap> +#include <QWidget> +#include <QObject> +#include <QMainWindow> +#include <QPushButton> +#include <QComboBox> + +#include <qaudioinput.h> + +#define BUFFER_SIZE_LOG 9 +#define BUFFER_SIZE (1 << BUFFER_SIZE_LOG) + +struct _struct_fft_state { + float real[BUFFER_SIZE]; + float imag[BUFFER_SIZE]; +}; +typedef _struct_fft_state fft_state; +typedef short int sound_sample; + +class Spectrum : public QIODevice +{ + Q_OBJECT +public: + Spectrum(QObject* parent, QAudioInput* device, float* out); + ~Spectrum(); + + void start(); + void stop(); + + qint64 readData(char *data, qint64 maxlen); + qint64 writeData(const char *data, qint64 len); + + QAudioInput* input; + float* output; + fft_state* fftState; + + unsigned int bitReverse[BUFFER_SIZE]; + float sintable[BUFFER_SIZE / 2]; + float costable[BUFFER_SIZE / 2]; + + void prepFFT (const sound_sample *input, float *re, float *im); + void calcFFT (float *re, float *im); + void outputFFT (const float *re, const float *im); + int reverseBits (unsigned int initial); + void performFFT (const sound_sample *input); + +signals: + void update(); +}; + + +class RenderArea : public QWidget +{ + Q_OBJECT + +public: + RenderArea(QWidget *parent = 0); + + void spectrum(float* output, int size); + +protected: + void paintEvent(QPaintEvent *event); + +private: + QPixmap pixmap; + + float* samples; + int sampleSize; +}; + +class InputTest : public QMainWindow +{ + Q_OBJECT +public: + InputTest(); + ~InputTest(); + + QAudioDeviceId device; + QAudioFormat format; + QAudioInput* audioInput; + Spectrum* spec; + QIODevice* input; + RenderArea* canvas; + + bool pullMode; + + QPushButton* button; + QPushButton* button2; + QComboBox* deviceBox; + + char* buffer; + float* output; + +private slots: + void refreshDisplay(); + void status(); + void readMore(); + void toggleMode(); + void toggleSuspend(); + void state(QAudio::State s); + void deviceChanged(int idx); +}; + |