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    41 

    42 #ifndef SYMBIANAUDIOINPUT_H

    43 #define SYMBIANAUDIOINPUT_H

    44 

    45 #include <QtMultimedia/qaudioengine.h>

    46 #include <QTime>

    47 #include <QTimer>

    48 #include <sounddevice.h>

    49 #include "symbianaudio.h"

    50 

    51 QT_BEGIN_NAMESPACE

    52 

    53 class SymbianAudioInput;

    54 

    55 class SymbianAudioInputPrivate : public QIODevice

    56 {

    57     friend class SymbianAudioInput;

    58     Q_OBJECT

    59 public:

    60     SymbianAudioInputPrivate(SymbianAudioInput *audio);

    61     ~SymbianAudioInputPrivate();

    62 

    63     qint64 readData(char *data, qint64 len);

    64     qint64 writeData(const char *data, qint64 len);

    65 

    66     void dataReady();

    67 

    68 private:

    69     SymbianAudioInput *const m_audioDevice;

    70 };

    71 

    72 class SymbianAudioInput

    73     :   public QAbstractAudioInput

    74     ,   public MDevSoundObserver

    75 {

    76     friend class SymbianAudioInputPrivate;

    77     Q_OBJECT

    78 public:

    79     SymbianAudioInput(const QByteArray &device,

    80                       const QAudioFormat &audioFormat);

    81     ~SymbianAudioInput();

    82 

    83     // QAbstractAudioInput

    84     QIODevice* start(QIODevice *device = 0);

    85     void stop();

    86     void reset();

    87     void suspend();

    88     void resume();

    89     int bytesReady() const;

    90     int periodSize() const;

    91     void setBufferSize(int value);

    92     int bufferSize() const;

    93     void setNotifyInterval(int milliSeconds);

    94     int notifyInterval() const;

    95     qint64 processedUSecs() const;

    96     qint64 elapsedUSecs() const;

    97     QAudio::Error error() const;

    98     QAudio::State state() const;

    99     QAudioFormat format() const;

   100 

   101     // MDevSoundObserver

   102     void InitializeComplete(TInt aError);

   103     void ToneFinished(TInt aError);

   104     void BufferToBeFilled(CMMFBuffer *aBuffer);

   105     void PlayError(TInt aError);

   106     void BufferToBeEmptied(CMMFBuffer *aBuffer);

   107     void RecordError(TInt aError);

   108     void ConvertError(TInt aError);

   109     void DeviceMessage(TUid aMessageType, const TDesC8 &aMsg);

   110 

   111 private slots:

   112     void pullData();

   113 

   114 private:

   115    void open();

   116    void startRecording();

   117    void startDevSoundL();

   118    void startDataTransfer();

   119    CMMFDataBuffer* currentBuffer() const;

   120    void pushData();

   121    qint64 read(char *data, qint64 len);

   122    void bufferEmptied();

   123    Q_INVOKABLE void close();

   124 

   125    qint64 getSamplesRecorded() const;

   126 

   127    void setError(QAudio::Error error);

   128    void setState(SymbianAudio::State state);

   129 

   130    QAudio::State initializingState() const;

   131 

   132 private:

   133     const QByteArray m_device;

   134     const QAudioFormat m_format;

   135 

   136     int m_clientBufferSize;

   137     int m_notifyInterval;

   138     QScopedPointer<QTimer> m_notifyTimer;

   139     QTime m_elapsed;

   140     QAudio::Error m_error;

   141 

   142     SymbianAudio::State m_internalState;

   143     QAudio::State m_externalState;

   144 

   145     bool m_pullMode;

   146     QIODevice *m_sink;

   147 

   148     QScopedPointer<QTimer> m_pullTimer;

   149 

   150     QScopedPointer<CMMFDevSound> m_devSound;

   151     TUint32 m_nativeFourCC;

   152     TMMFCapabilities m_nativeFormat;

   153 

   154     // Latest buffer provided by DevSound, to be empied of data.

   155     CMMFDataBuffer *m_devSoundBuffer;

   156 

   157     int m_devSoundBufferSize;

   158 

   159     // Total amount of data in buffers provided by DevSound

   160     int m_totalBytesReady;

   161 

   162     // Queue of buffers returned after call to CMMFDevSound::Pause().

   163     QList<CMMFDataBuffer *> m_devSoundBufferQ;

   164 

   165     // Current read position within m_devSoundBuffer

   166     qint64 m_devSoundBufferPos;

   167 

   168     // Samples recorded up to the last call to suspend().  It is necessary

   169     // to cache this because suspend() is implemented using

   170     // CMMFDevSound::Stop(), which resets DevSound's SamplesRecorded() counter.

   171     quint32 m_totalSamplesRecorded;

   172 

   173 };

   174 

   175 QT_END_NAMESPACE

   176 

   177 #endif