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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 

    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 "qaudio.h"

    67 #include "qaudiodeviceinfo.h"

    68 #include "qaudiosystem.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);

    79     ~QAudioInputPrivate();

    80 

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

    82 

    83     void start(QIODevice* device);

    84     QIODevice* start();

    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     void setFormat(const QAudioFormat& fmt);

   100     QAudioFormat format() const;

   101     bool resuming;

   102     snd_pcm_t* handle;

   103     qint64 totalTimeValue;

   104     QIODevice* audioSource;

   105     QAudioFormat settings;

   106     QAudio::Error errorState;

   107     QAudio::State deviceState;

   108 

   109 private slots:

   110     void userFeed();

   111     bool deviceReady();

   112 

   113 private:

   114     int xrun_recovery(int err);

   115     int setFormat();

   116     bool open();

   117     void close();

   118     void drain();

   119 

   120     QTimer* timer;

   121     QTime timeStamp;

   122     QTime clockStamp;

   123     qint64 elapsedTimeOffset;

   124     int intervalTime;

   125     char* audioBuffer;

   126     int bytesAvailable;

   127     QByteArray m_device;

   128     bool pullMode;

   129     int buffer_size;

   130     int period_size;

   131     unsigned int buffer_time;

   132     unsigned int period_time;

   133     snd_pcm_uframes_t buffer_frames;

   134     snd_pcm_uframes_t period_frames;

   135     snd_async_handler_t* ahandler;

   136     snd_pcm_access_t access;

   137     snd_pcm_format_t pcmformat;

   138     snd_timestamp_t* timestamp;

   139     snd_pcm_hw_params_t *hwparams;

   140 };

   141 

   142 class InputPrivate : public QIODevice

   143 {

   144     Q_OBJECT

   145 public:

   146     InputPrivate(QAudioInputPrivate* audio);

   147     ~InputPrivate();

   148 

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

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

   151 

   152     void trigger();

   153 private:

   154     QAudioInputPrivate *audioDevice;

   155 };

   156 

   157 QT_END_NAMESPACE

   158 

   159 #endif