AirTV-Qt/audiooutput.h

   1 /**
   2  *  Copyright (C) 2011-2012  Juho Vähä-Herttua
   3  *
   4  *  This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Lesser General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2.1 of the License, or (at your option) any later version.
   8  *
   9  *  This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Lesser General Public License for more details.
  13  */
  14
  15 #ifndef AUDIOOUTPUT_H
  16 #define AUDIOOUTPUT_H
  17
  18 #include <QObject>
  19 #include <QIODevice>
  20 #include <QByteArray>
  21 #include <QAudioFormat>
  22 #include <QAudioDeviceInfo>
  23 #include <QAudioOutput>
  24 #include <QIODevice>
  25
  26 class AudioOutput : public QIODevice
  27 {
  28     Q_OBJECT
  29 public:
  30     explicit AudioOutput(QObject *parent = 0);
  31     bool init(int bits, int channels, int samplerate);
  32     bool setDevice(QAudioDeviceInfo deviceInfo);
  33
  34     void start();
  35     void setVolume(float volume);
  36     void output(const QByteArray & data);
  37     void flush();
  38     void stop();
  39
  40     qint64 readData(char *data, qint64 maxlen);
  41     qint64 writeData(const char *data, qint64 len);
  42     qint64 bytesAvailable() const;
  43     bool isSequential() const;
  44
  45 private:
  46     void reinit();
  47
  48 private:
  49     bool             m_initialized;
  50     QByteArray       m_buffer;
  51     QAudioFormat     m_format;
  52     QAudioDeviceInfo m_deviceInfo;
  53     QAudioOutput*    m_output;
  54     float            m_volume;
  55
  56 signals:
  57
  58 public slots:
  59
  60 private slots:
  61     void notified();
  62     void stateChanged(QAudio::State state);
  63 };
  64
  65 #endif // AUDIOOUTPUT_H