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41 
42 //
43 //  W A R N I N G
44 //  -------------
45 //
46 // This file is not part of the Qt API.  It exists for the convenience
47 // of other Qt classes.  This header file may change from version to
48 // version without notice, or even be removed.
49 //
50 // We mean it.
51 //
52 
53 #ifndef QAUDIOINPUT_SYMBIAN_P_H
54 #define QAUDIOINPUT_SYMBIAN_P_H
55 
56 #include <QtMultimedia/qaudioengine.h>
57 #include <QTime>
58 #include <QTimer>
59 #include "qaudio_symbian_p.h"
60 
61 QT_BEGIN_NAMESPACE
62 
63 class QAudioInputPrivate;
64 
65 class SymbianAudioInputPrivate : public QIODevice
66 {
67     friend class QAudioInputPrivate;
68     Q_OBJECT
69 public:
70     SymbianAudioInputPrivate(QAudioInputPrivate *audio);
71     ~SymbianAudioInputPrivate();
72 
73     qint64 readData(char *data, qint64 len);
74     qint64 writeData(const char *data, qint64 len);
75 
76     void dataReady();
77 
78 private:
79     QAudioInputPrivate *const m_audioDevice;
80 };
81 
82 class QAudioInputPrivate
83     :   public QAbstractAudioInput
84 {
85     friend class SymbianAudioInputPrivate;
86     Q_OBJECT
87 public:
88     QAudioInputPrivate(const QByteArray &device,
89                       const QAudioFormat &audioFormat);
90     ~QAudioInputPrivate();
91 
92     // QAbstractAudioInput
93     QIODevice* start(QIODevice *device = 0);
94     void stop();
95     void reset();
96     void suspend();
97     void resume();
98     int bytesReady() const;
99     int periodSize() const;
100     void setBufferSize(int value);
101     int bufferSize() const;
102     void setNotifyInterval(int milliSeconds);
103     int notifyInterval() const;
104     qint64 processedUSecs() const;
105     qint64 elapsedUSecs() const;
106     QAudio::Error error() const;
107     QAudio::State state() const;
108     QAudioFormat format() const;
109 
110 private slots:
111     void pullData();
112     void devsoundInitializeComplete(int err);
113     void devsoundBufferToBeEmptied(CMMFBuffer *);
114     void devsoundRecordError(int err);
115 
116 private:
117    void open();
118    void startRecording();
119    void startDataTransfer();
120    CMMFDataBuffer* currentBuffer() const;
121    void pushData();
122    qint64 read(char *data, qint64 len);
123    void bufferEmptied();
124    Q_INVOKABLE void close();
125 
126    qint64 getSamplesRecorded() const;
127 
128    void setError(QAudio::Error error);
129    void setState(SymbianAudio::State state);
130 
131 private:
132     const QByteArray m_device;
133     const QAudioFormat m_format;
134 
135     int m_clientBufferSize;
136     int m_notifyInterval;
137     QScopedPointer<QTimer> m_notifyTimer;
138     QTime m_elapsed;
139     QAudio::Error m_error;
140 
141     SymbianAudio::State m_internalState;
142     QAudio::State m_externalState;
143 
144     bool m_pullMode;
145     QIODevice *m_sink;
146 
147     QScopedPointer<QTimer> m_pullTimer;
148 
149     SymbianAudio::DevSoundWrapper* m_devSound;
150 
151     // Latest buffer provided by DevSound, to be empied of data.
152     CMMFDataBuffer *m_devSoundBuffer;
153 
154     int m_devSoundBufferSize;
155 
156     // Total amount of data in buffers provided by DevSound
157     int m_totalBytesReady;
158 
159     // Queue of buffers returned after call to CMMFDevSound::Pause().
160     QList<CMMFDataBuffer *> m_devSoundBufferQ;
161 
162     // Current read position within m_devSoundBuffer
163     qint64 m_devSoundBufferPos;
164 
165     // Samples recorded up to the last call to suspend().  It is necessary
166     // to cache this because suspend() is implemented using
167     // CMMFDevSound::Stop(), which resets DevSound's SamplesRecorded() counter.
168     quint32 m_totalSamplesRecorded;
169 
170 };
171 
172 QT_END_NAMESPACE
173 
174 #endif
175