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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
//
// 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 QAUDIOOUTPUTALSA_H
#define QAUDIOOUTPUTALSA_H
#include <alsa/asoundlib.h>
#include <QtCore/qfile.h>
#include <QtCore/qdebug.h>
#include <QtCore/qtimer.h>
#include <QtCore/qstring.h>
#include <QtCore/qstringlist.h>
#include <QtCore/qelapsedtimer.h>
#include <QtCore/qiodevice.h>
#include <QtMultimedia/qaudio.h>
#include <QtMultimedia/qaudiodevice.h>
#include <private/qaudiosystem_p.h>
QT_BEGIN_NAMESPACE
class QAlsaAudioSink : public QPlatformAudioSink
{
friend class AlsaOutputPrivate;
Q_OBJECT
public:
QAlsaAudioSink(const QByteArray &device, QObject *parent);
~QAlsaAudioSink();
qint64 write( const char *data, qint64 len );
void start(QIODevice* device) override;
QIODevice* start() override;
void stop() override;
void reset() override;
void suspend() override;
void resume() override;
qsizetype bytesFree() const override;
void setBufferSize(qsizetype value) override;
qsizetype bufferSize() const override;
qint64 processedUSecs() const override;
QAudio::Error error() const override;
QAudio::State state() const override;
void setFormat(const QAudioFormat& fmt) override;
QAudioFormat format() const override;
void setVolume(qreal) override;
qreal volume() const override;
QIODevice* audioSource = nullptr;
QAudioFormat settings;
QAudio::Error errorState = QAudio::NoError;
QAudio::State deviceState = QAudio::StoppedState;
QAudio::State suspendedInState = QAudio::SuspendedState;
private slots:
void userFeed();
bool deviceReady();
signals:
void processMore();
private:
bool opened = false;
bool pullMode = true;
bool resuming = false;
int buffer_size = 0;
int period_size = 0;
qint64 totalTimeValue = 0;
unsigned int buffer_time = 100000;
unsigned int period_time = 20000;
snd_pcm_uframes_t buffer_frames;
snd_pcm_uframes_t period_frames;
int xrun_recovery(int err);
int setFormat();
bool open();
void close();
QTimer* timer = nullptr;
QByteArray m_device;
int bytesAvailable = 0;
qint64 elapsedTimeOffset = 0;
char* audioBuffer = nullptr;
snd_pcm_t* handle = nullptr;
snd_pcm_access_t access = SND_PCM_ACCESS_RW_INTERLEAVED;
snd_pcm_format_t pcmformat = SND_PCM_FORMAT_S16;
snd_pcm_hw_params_t *hwparams = nullptr;
qreal m_volume = 1.0f;
};
class AlsaOutputPrivate : public QIODevice
{
friend class QAlsaAudioSink;
Q_OBJECT
public:
AlsaOutputPrivate(QAlsaAudioSink* audio);
~AlsaOutputPrivate();
qint64 readData( char* data, qint64 len) override;
qint64 writeData(const char* data, qint64 len) override;
private:
QAlsaAudioSink *audioDevice;
};
QT_END_NAMESPACE
#endif
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