/**************************************************************************** ** ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** You may use this file under the terms of the BSD license as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor ** the names of its contributors may be used to endorse or promote ** products derived from this software without specific prior written ** permission. ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** $QT_END_LICENSE$ ** ****************************************************************************/ #ifndef UTILS_H #define UTILS_H #include <QtCore/qglobal.h> #include <QDebug> QT_FORWARD_DECLARE_CLASS(QAudioFormat) //----------------------------------------------------------------------------- // Miscellaneous utility functions //----------------------------------------------------------------------------- qint64 audioDuration(const QAudioFormat &format, qint64 bytes); qint64 audioLength(const QAudioFormat &format, qint64 microSeconds); QString formatToString(const QAudioFormat &format); qreal nyquistFrequency(const QAudioFormat &format); // Scale PCM value to [-1.0, 1.0] qreal pcmToReal(qint16 pcm); // Scale real value in [-1.0, 1.0] to PCM qint16 realToPcm(qreal real); // Check whether the audio format is PCM bool isPCM(const QAudioFormat &format); // Check whether the audio format is signed, little-endian, 16-bit PCM bool isPCMS16LE(const QAudioFormat &format); // Compile-time calculation of powers of two template<int N> class PowerOfTwo { public: static const int Result = PowerOfTwo<N-1>::Result * 2; }; template<> class PowerOfTwo<0> { public: static const int Result = 1; }; //----------------------------------------------------------------------------- // Debug output //----------------------------------------------------------------------------- class NullDebug { public: template <typename T> NullDebug& operator<<(const T&) { return *this; } }; inline NullDebug nullDebug() { return NullDebug(); } #ifdef LOG_ENGINE # define ENGINE_DEBUG qDebug() #else # define ENGINE_DEBUG nullDebug() #endif #ifdef LOG_SPECTRUMANALYSER # define SPECTRUMANALYSER_DEBUG qDebug() #else # define SPECTRUMANALYSER_DEBUG nullDebug() #endif #ifdef LOG_WAVEFORM # define WAVEFORM_DEBUG qDebug() #else # define WAVEFORM_DEBUG nullDebug() #endif #endif // UTILS_H