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    37 

    38 

    39 #ifndef WAVFILE_H

    40 #define WAVFILE_H

    41 

    42 #include <QtCore/qobject.h>

    43 #include <QtCore/qfile.h>

    44 #include <QtMultimedia/qaudioformat.h>

    45 

    46 /**

    47  * Helper class for reading WAV files

    48  *

    49  * See https://ccrma.stanford.edu/courses/422/projects/WaveFormat/

    50  */

    51 class WavFile

    52 {

    53 public:

    54     WavFile(const QAudioFormat &format = QAudioFormat(),

    55               qint64 dataLength = 0);

    56 

    57     // Reads WAV header and seeks to start of data

    58     bool readHeader(QIODevice &device);

    59 

    60     // Writes WAV header

    61     bool writeHeader(QIODevice &device);

    62 

    63     // Read PCM data

    64     qint64 readData(QIODevice &device, QByteArray &buffer,

    65                     QAudioFormat outputFormat = QAudioFormat());

    66 

    67     const QAudioFormat& format() const;

    68     qint64 dataLength() const;

    69 

    70     static qint64 headerLength();

    71 

    72     static bool writeDataLength(QIODevice &device, qint64 dataLength);

    73 

    74 private:

    75     QAudioFormat m_format;

    76     qint64 m_dataLength;

    77 };

    78 

    79 #endif

    80