source: trunk/src/multimedia/audio/qaudiodeviceinfo_alsa_p.h

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//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of other Qt classes.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//


#ifndef QAUDIODEVICEINFOALSA_H
#define QAUDIODEVICEINFOALSA_H

#include <alsa/asoundlib.h>

#include <QtCore/qbytearray.h>
#include <QtCore/qstringlist.h>
#include <QtCore/qlist.h>
#include <QtCore/qdebug.h>

#include <QtMultimedia/qaudio.h>
#include <QtMultimedia/qaudiodeviceinfo.h>
#include <QtMultimedia/qaudioengine.h>

QT_BEGIN_NAMESPACE

const unsigned int MAX_SAMPLE_RATES = 5;
const unsigned int SAMPLE_RATES[] =
    { 8000, 11025, 22050, 44100, 48000 };

class QAudioDeviceInfoInternal : public QAbstractAudioDeviceInfo
{
    Q_OBJECT
public:
    QAudioDeviceInfoInternal(QByteArray dev,QAudio::Mode mode);
    ~QAudioDeviceInfoInternal();

    bool testSettings(const QAudioFormat& format) const;
    void updateLists();
    QAudioFormat preferredFormat() const;
    bool isFormatSupported(const QAudioFormat& format) const;
    QAudioFormat nearestFormat(const QAudioFormat& format) const;
    QString deviceName() const;
    QStringList codecList();
    QList<int> frequencyList();
    QList<int> channelsList();
    QList<int> sampleSizeList();
    QList<QAudioFormat::Endian> byteOrderList();
    QList<QAudioFormat::SampleType> sampleTypeList();
    static QByteArray defaultInputDevice();
    static QByteArray defaultOutputDevice();
    static QList<QByteArray> availableDevices(QAudio::Mode);

private:
    bool open();
    void close();

#if (SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
    void checkSurround();
    bool surround40;
    bool surround51;
    bool surround71;
#endif

    QString device;
    QAudio::Mode mode;
    QAudioFormat nearest;
    QList<int> freqz;
    QList<int> channelz;
    QList<int> sizez;
    QList<QAudioFormat::Endian> byteOrderz;
    QStringList codecz;
    QList<QAudioFormat::SampleType> typez;
    snd_pcm_t* handle;
    snd_pcm_hw_params_t *params;
};

QT_END_NAMESPACE

#endif