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/qurl.h>
21#include <QtCore/private/qglobal_p.h>
22
23QT_BEGIN_NAMESPACE
24
25class QIODevice;
26class Q_MULTIMEDIA_EXPORT QPlatformAudioDecoder : public QObject
27{
28 Q_OBJECT
29
30public:
31 virtual QUrl source() const = 0;
32 virtual void setSource(const QUrl &fileName) = 0;
33
34 virtual QIODevice* sourceDevice() const = 0;
35 virtual void setSourceDevice(QIODevice *device) = 0;
36
37 virtual void start() = 0;
38 virtual void stop() = 0;
39
40 virtual QAudioFormat audioFormat() const = 0;
41 virtual void setAudioFormat(const QAudioFormat &format) = 0;
42
43 virtual QAudioBuffer read() = 0;
44 virtual bool bufferAvailable() const { return m_bufferAvailable; }
45
46 virtual qint64 position() const { return m_position; }
47 virtual qint64 duration() const { return m_duration; }
48
49 void formatChanged(const QAudioFormat &format);
50
51 void sourceChanged();
52
53 void error(int error, const QString &errorString);
54 void clearError() { error(error: QAudioDecoder::NoError, errorString: QString()); }
55
56 void bufferReady();
57 void bufferAvailableChanged(bool available);
58 void setIsDecoding(bool running = true) {
59 if (m_isDecoding == running)
60 return;
61 m_isDecoding = running;
62 emit q->isDecodingChanged(m_isDecoding);
63 }
64 void finished();
65 bool isDecoding() const { return m_isDecoding; }
66
67 void positionChanged(qint64 position);
68 void durationChanged(qint64 duration);
69
70 QAudioDecoder::Error error() const { return m_error; }
71 QString errorString() const { return m_errorString; }
72
73 virtual bool canReadQrc() const { return false; }
74
75 ~QPlatformAudioDecoder() override;
76
77protected:
78 explicit QPlatformAudioDecoder(QAudioDecoder *parent);
79
80private:
81 QAudioDecoder *q = nullptr;
82
83 qint64 m_duration = -1;
84 qint64 m_position = -1;
85 QAudioDecoder::Error m_error = QAudioDecoder::NoError;
86 QString m_errorString;
87 bool m_isDecoding = false;
88 bool m_bufferAvailable = false;
89};
90
91QT_END_NAMESPACE
92
93#endif // QAUDIODECODERCONTROL_H
94

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