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Diffstat (limited to 'examples/spectrum/app/utils.cpp')
-rw-r--r-- | examples/spectrum/app/utils.cpp | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/examples/spectrum/app/utils.cpp b/examples/spectrum/app/utils.cpp deleted file mode 100644 index 31cc25b..0000000 --- a/examples/spectrum/app/utils.cpp +++ /dev/null @@ -1,139 +0,0 @@ -/**************************************************************************** -** -** 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." -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include <QtMultimedia/QAudioFormat> -#include "utils.h" - -qint64 audioDuration(const QAudioFormat &format, qint64 bytes) -{ - return (bytes * 1000000) / - (format.frequency() * format.channels() * (format.sampleSize() / 8)); -} - -qint64 audioLength(const QAudioFormat &format, qint64 microSeconds) -{ - qint64 result = (format.frequency() * format.channels() * (format.sampleSize() / 8)) - * microSeconds / 1000000; - result -= result % (format.channelCount() * format.sampleSize()); - return result; -} - -qreal nyquistFrequency(const QAudioFormat &format) -{ - return format.frequency() / 2; -} - -QString formatToString(const QAudioFormat &format) -{ - QString result; - - if (QAudioFormat() != format) { - if (format.codec() == "audio/pcm") { - Q_ASSERT(format.sampleType() == QAudioFormat::SignedInt); - - const QString formatEndian = (format.byteOrder() == QAudioFormat::LittleEndian) - ? QString("LE") : QString("BE"); - - QString formatType; - switch (format.sampleType()) { - case QAudioFormat::SignedInt: - formatType = "signed"; - break; - case QAudioFormat::UnSignedInt: - formatType = "unsigned"; - break; - case QAudioFormat::Float: - formatType = "float"; - break; - case QAudioFormat::Unknown: - formatType = "unknown"; - break; - } - - QString formatChannels = QString("%1 channels").arg(format.channels()); - switch (format.channels()) { - case 1: - formatChannels = "mono"; - break; - case 2: - formatChannels = "stereo"; - break; - } - - result = QString("%1 Hz %2 bit %3 %4 %5") - .arg(format.frequency()) - .arg(format.sampleSize()) - .arg(formatType) - .arg(formatEndian) - .arg(formatChannels); - } else { - result = format.codec(); - } - } - - return result; -} - -bool isPCM(const QAudioFormat &format) -{ - return (format.codec() == "audio/pcm"); -} - - -bool isPCMS16LE(const QAudioFormat &format) -{ - return (isPCM(format) && - format.sampleType() == QAudioFormat::SignedInt && - format.sampleSize() == 16 && - format.byteOrder() == QAudioFormat::LittleEndian); -} - -const qint16 PCMS16MaxValue = 32767; -const quint16 PCMS16MaxAmplitude = 32768; // because minimum is -32768 - -qreal pcmToReal(qint16 pcm) -{ - return qreal(pcm) / PCMS16MaxAmplitude; -} - -qint16 realToPcm(qreal real) -{ - return real * PCMS16MaxValue; -} |