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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtMultimedia module of the Qt Toolkit.

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     9 ** $QT_BEGIN_LICENSE:LGPL$

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    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    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 

    54 #ifndef QAUDIOINPUTALSA_H

    55 #define QAUDIOINPUTALSA_H

    56 

    57 #include <alsa/asoundlib.h>

    58 

    59 #include <QtCore/qfile.h>

    60 #include <QtCore/qdebug.h>

    61 #include <QtCore/qtimer.h>

    62 #include <QtCore/qstring.h>

    63 #include <QtCore/qstringlist.h>

    64 #include <QtCore/qdatetime.h>

    65 

    66 #include <QtMultimedia/qaudio.h>

    67 #include <QtMultimedia/qaudiodeviceinfo.h>

    68 #include <QtMultimedia/qaudioengine.h>

    69 

    70 QT_BEGIN_NAMESPACE

    71 

    72 class InputPrivate;

    73 

    74 class QAudioInputPrivate : public QAbstractAudioInput

    75 {

    76     Q_OBJECT

    77 public:

    78     QAudioInputPrivate(const QByteArray &device, const QAudioFormat& audioFormat);

    79     ~QAudioInputPrivate();

    80 

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

    82 

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

    84     void stop();

    85     void reset();

    86     void suspend();

    87     void resume();

    88     int bytesReady() const;

    89     int periodSize() const;

    90     void setBufferSize(int value);

    91     int bufferSize() const;

    92     void setNotifyInterval(int milliSeconds);

    93     int notifyInterval() const;

    94     qint64 totalTime() const;

    95     qint64 clock() const;

    96     QAudio::Error error() const;

    97     QAudio::State state() const;

    98     QAudioFormat format() const;

    99     bool resuming;

   100     snd_pcm_t* handle;

   101     qint64 totalTimeValue;

   102     QIODevice* audioSource;

   103     QAudioFormat settings;

   104     QAudio::Error errorState;

   105     QAudio::State deviceState;

   106 

   107 private slots:

   108     void userFeed();

   109     bool deviceReady();

   110 

   111 private:

   112     int xrun_recovery(int err);

   113     int setFormat();

   114     bool open();

   115     void close();

   116     void drain();

   117 

   118     QTimer* timer;

   119     QTime timeStamp;

   120     QTime clockStamp;

   121     qint64 elapsedTimeOffset;

   122     int intervalTime;

   123     char* audioBuffer;

   124     int bytesAvailable;

   125     QByteArray m_device;

   126     bool pullMode;

   127     int buffer_size;

   128     int period_size;

   129     unsigned int buffer_time;

   130     unsigned int period_time;

   131     snd_pcm_uframes_t buffer_frames;

   132     snd_pcm_uframes_t period_frames;

   133     snd_async_handler_t* ahandler;

   134     snd_pcm_access_t access;

   135     snd_pcm_format_t pcmformat;

   136     snd_timestamp_t* timestamp;

   137     snd_pcm_hw_params_t *hwparams;

   138 };

   139 

   140 class InputPrivate : public QIODevice

   141 {

   142     Q_OBJECT

   143 public:

   144     InputPrivate(QAudioInputPrivate* audio);

   145     ~InputPrivate();

   146 

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

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

   149 

   150     void trigger();

   151 private:

   152     QAudioInputPrivate *audioDevice;

   153 };

   154 

   155 QT_END_NAMESPACE

   156 

   157 #endif