1 files changed, 136 insertions, 0 deletions
diff --git a/src/multimedia/pulseaudio/qpulseaudiosink_p.h b/src/multimedia/pulseaudio/qpulseaudiosink_p.h
new file mode 100644
index 000000000..cf0b181ec
--- /dev/null
+++ b/src/multimedia/pulseaudio/qpulseaudiosink_p.h
@@ -0,0 +1,136 @@
+// 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
+
+#ifndef QAUDIOOUTPUTPULSE_H
+#define QAUDIOOUTPUTPULSE_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qfile.h>
+#include <QtCore/qtimer.h>
+#include <QtCore/qstring.h>
+#include <QtCore/qstringlist.h>
+#include <QtCore/qelapsedtimer.h>
+#include <QtCore/qiodevice.h>
+
+#include "qaudio.h"
+#include "qaudiodevice.h"
+#include "pulseaudio/qpulsehelpers_p.h"
+
+#include <private/qaudiosystem_p.h>
+#include <private/qaudiostatemachine_p.h>
+#include <pulse/pulseaudio.h>
+
+QT_BEGIN_NAMESPACE
+
+class QPulseAudioSink : public QPlatformAudioSink
+{
+    friend class PulseOutputPrivate;
+    Q_OBJECT
+
+public:
+    QPulseAudioSink(const QByteArray &device, QObject *parent);
+    ~QPulseAudioSink();
+
+    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 &format) override;
+    QAudioFormat format() const override;
+
+    void setVolume(qreal volume) override;
+    qreal volume() const override;
+
+    void streamUnderflowCallback();
+    void streamDrainedCallback();
+
+protected:
+    void timerEvent(QTimerEvent *event) override;
+
+private:
+    void startPulling();
+    void stopTimer();
+
+    bool open();
+    void close();
+    qint64 write(const char *data, qint64 len);
+
+private Q_SLOTS:
+    void userFeed();
+    void onPulseContextFailed();
+
+    PAOperationUPtr exchangeDrainOperation(pa_operation *newOperation);
+
+private:
+    qsizetype defaultBufferSize() const;
+
+    pa_sample_spec m_spec = {};
+    // calculate timing manually, as pulseaudio doesn't give us good enough data
+    mutable timeval lastTimingInfo = {};
+
+    mutable QList<qint64> latencyList; // last latency values
+
+    QByteArray m_device;
+    QByteArray m_streamName;
+    QAudioFormat m_format;
+    QBasicTimer m_tickTimer;
+
+    QIODevice *m_audioSource = nullptr;
+    pa_stream *m_stream = nullptr;
+    std::vector<char> m_audioBuffer;
+
+    qint64 m_totalTimeValue = 0;
+    qint64 m_elapsedTimeOffset = 0;
+    mutable qint64 averageLatency = 0; // average latency
+    mutable qint64 lastProcessedUSecs = 0;
+    qreal m_volume = 1.0;
+
+    std::atomic<pa_operation *> m_drainOperation = nullptr;
+    qsizetype m_bufferSize = 0;
+    std::optional<qsizetype> m_userBufferSize = std::nullopt;
+    int m_pullingPeriodSize = 0;
+    int m_pullingPeriodTime = 0;
+    bool m_pullMode = true;
+    bool m_opened = false;
+
+    QAudioStateMachine m_stateMachine;
+};
+
+class PulseOutputPrivate : public QIODevice
+{
+    friend class QPulseAudioSink;
+    Q_OBJECT
+
+public:
+    PulseOutputPrivate(QPulseAudioSink *audio);
+    virtual ~PulseOutputPrivate() {}
+
+protected:
+    qint64 readData(char *data, qint64 len) override;
+    qint64 writeData(const char *data, qint64 len) override;
+
+private:
+    QPulseAudioSink *m_audioDevice;
+};
+
+QT_END_NAMESPACE
+
+#endif