--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/demos/spectrum/app/wavfile.h	Fri Jun 11 14:24:45 2010 +0300
@@ -0,0 +1,80 @@
+/****************************************************************************
+**
+** 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
+