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Diffstat (limited to 'demos/spectrum/app/wavfile.h')
-rw-r--r-- | demos/spectrum/app/wavfile.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/demos/spectrum/app/wavfile.h b/demos/spectrum/app/wavfile.h new file mode 100644 index 0000000000..f2f330409f --- /dev/null +++ b/demos/spectrum/app/wavfile.h @@ -0,0 +1,83 @@ +/**************************************************************************** +** +** Copyright (C) 2010 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 WAVFILE_H +#define WAVFILE_H + +#include <QtCore/qobject.h> +#include <QtCore/qfile.h> +#include <QtMultimedia/qaudioformat.h> + +/** + * Helper class for reading WAV files + * + * See https://ccrma.stanford.edu/courses/422/projects/WaveFormat/ + */ +class WavFile +{ +public: + WavFile(const QAudioFormat &format = QAudioFormat(), + qint64 dataLength = 0); + + // Reads WAV header and seeks to start of data + bool readHeader(QIODevice &device); + + // Writes WAV header + bool writeHeader(QIODevice &device); + + // Read PCM data + qint64 readData(QIODevice &device, QByteArray &buffer, + QAudioFormat outputFormat = QAudioFormat()); + + const QAudioFormat& format() const; + qint64 dataLength() const; + + static qint64 headerLength(); + + static bool writeDataLength(QIODevice &device, qint64 dataLength); + +private: + QAudioFormat m_format; + qint64 m_dataLength; +}; + +#endif + |