qandroidaudiodecoder_p.h

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// Copyright (C) 2021 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 QANDROIDAUDIODECODER_P_H

#define QANDROIDAUDIODECODER_P_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 <QtMultimedia/private/qplatformaudiodecoder_p.h>

#include <QtCore/qurl.h>

#include <QThread>

#include "media/NdkMediaCodec.h"

#include "media/NdkMediaExtractor.h"

#include "media/NdkMediaFormat.h"

#include "media/NdkMediaError.h"

QT_BEGIN_NAMESPACE

class Decoder : public QObject

    Q_OBJECT

public:

    Decoder();

    ~Decoder();

public Q_SLOTS:

    void setSource(const QUrl &source);

    void doDecode();

    void stop();

Q_SIGNALS:

    void positionChanged(const QAudioBuffer &buffer, std::chrono::milliseconds position);

    void durationChanged(std::chrono::milliseconds duration);

    void error(const QAudioDecoder::Error error, const QString &errorString);

    void finished();

    void decodingChanged(bool decoding);

private:

    void createDecoder();

    AMediaCodec *m_codec = nullptr;

    AMediaExtractor *m_extractor = nullptr;

    AMediaFormat *m_format = nullptr;

    QAudioFormat m_outputFormat;

    QString m_formatError;

    bool m_inputEOS;

};

class QAndroidAudioDecoder : public QPlatformAudioDecoder

    Q_OBJECT

public:

    QAndroidAudioDecoder(QAudioDecoder *parent);

        virtual ~QAndroidAudioDecoder();

    QUrl source() const override { return m_source; }

    void setSource(const QUrl &fileName) override;

    QIODevice *sourceDevice() const override { return m_device; }

    void setSourceDevice(QIODevice *device) override;

    void start() override;

    void stop() override;

    QAudioFormat audioFormat() const override { return {}; }

    void setAudioFormat(const QAudioFormat &/*format*/) override {}

    QAudioBuffer read() override;

    bool bufferAvailable() const override;

Q_SIGNALS:

    void setSourceUrl(const QUrl &source);

private Q_SLOTS:

    void positionChanged(QAudioBuffer audioBuffer, std::chrono::milliseconds position);

    void durationChanged(std::chrono::milliseconds duration);

    void error(const QAudioDecoder::Error error, const QString &errorString);

    void readDevice();

    void finished();

private:

    bool requestPermissions();

    bool createTempFile();

    void decode();

    QIODevice *m_device = nullptr;

    Decoder *m_decoder = nullptr;

    QList<std::pair<QAudioBuffer, std::chrono::milliseconds>> m_audioBuffer;

    QUrl m_source;

    QByteArray m_deviceBuffer;

    QThread *m_threadDecoder = nullptr;

};

QT_END_NAMESPACE

#endif // QANDROIDAUDIODECODER_P_H