source: trunk/demos/spectrum/app/wavfile.h@ 769

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#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