1// Copyright (C) 2021 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QAUDIODECODERCONTROL_H
5#define QAUDIODECODERCONTROL_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include <QtMultimedia/qaudiobuffer.h>
19#include <QtMultimedia/qaudiodecoder.h>
20#include <QtCore/qpair.h>
21#include <QtCore/qurl.h>
22#include <QtCore/private/qglobal_p.h>
23
24QT_BEGIN_NAMESPACE
25
26class QIODevice;
27class Q_MULTIMEDIA_EXPORT QPlatformAudioDecoder : public QObject
28{
29 Q_OBJECT
30
31public:
32 virtual QUrl source() const = 0;
33 virtual void setSource(const QUrl &fileName) = 0;
34
35 virtual QIODevice* sourceDevice() const = 0;
36 virtual void setSourceDevice(QIODevice *device) = 0;
37
38 virtual void start() = 0;
39 virtual void stop() = 0;
40
41 virtual QAudioFormat audioFormat() const = 0;
42 virtual void setAudioFormat(const QAudioFormat &format) = 0;
43
44 virtual QAudioBuffer read() = 0;
45 virtual bool bufferAvailable() const { return m_bufferAvailable; }
46
47 virtual qint64 position() const { return m_position; }
48 virtual qint64 duration() const { return m_duration; }
49
50 void formatChanged(const QAudioFormat &format);
51
52 void sourceChanged();
53
54 void error(int error, const QString &errorString);
55 void clearError() { error(error: QAudioDecoder::NoError, errorString: QString()); }
56
57 void bufferReady();
58 void bufferAvailableChanged(bool available);
59 void setIsDecoding(bool running = true) {
60 if (m_isDecoding == running)
61 return;
62 m_isDecoding = running;
63 emit q->isDecodingChanged(m_isDecoding);
64 }
65 void finished();
66 bool isDecoding() const { return m_isDecoding; }
67
68 void positionChanged(qint64 position);
69 void durationChanged(qint64 duration);
70
71 QAudioDecoder::Error error() const { return m_error; }
72 QString errorString() const { return m_errorString; }
73
74 virtual bool canReadQrc() const { return false; }
75
76 ~QPlatformAudioDecoder() override;
77
78protected:
79 explicit QPlatformAudioDecoder(QAudioDecoder *parent);
80
81private:
82 QAudioDecoder *q = nullptr;
83
84 qint64 m_duration = -1;
85 qint64 m_position = -1;
86 QAudioDecoder::Error m_error = QAudioDecoder::NoError;
87 QString m_errorString;
88 bool m_isDecoding = false;
89 bool m_bufferAvailable = false;
90};
91
92QT_END_NAMESPACE
93
94#endif // QAUDIODECODERCONTROL_H
95

source code of qtmultimedia/src/multimedia/platform/qplatformaudiodecoder_p.h