1// Copyright (C) 2016 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//
5// W A R N I N G
6// -------------
7//
8// This file is not part of the Qt API. It exists for the convenience
9// of other Qt classes. This header file may change from version to
10// version without notice, or even be removed.
11//
12// We mean it.
13//
14
15#ifndef QAUDIOINPUTGSTREAMER_H
16#define QAUDIOINPUTGSTREAMER_H
17
18#include <QtCore/qfile.h>
19#include <QtCore/qtimer.h>
20#include <QtCore/qstring.h>
21#include <QtCore/qstringlist.h>
22#include <QtCore/qelapsedtimer.h>
23#include <QtCore/qiodevice.h>
24#include <QtCore/qmutex.h>
25#include <QtCore/qatomic.h>
26#include <QtCore/private/qringbuffer_p.h>
27
28#include "qaudio.h"
29#include "qaudiodevice.h"
30#include <private/qaudiosystem_p.h>
31
32#include <qgstutils_p.h>
33#include <qgstpipeline_p.h>
34#include <gst/app/gstappsink.h>
35
36QT_BEGIN_NAMESPACE
37
38class GStreamerInputPrivate;
39
40class QGStreamerAudioSource
41 : public QPlatformAudioSource
42{
43 Q_OBJECT
44 friend class GStreamerInputPrivate;
45public:
46 QGStreamerAudioSource(const QAudioDevice &device, QObject *parent);
47 ~QGStreamerAudioSource();
48
49 void start(QIODevice *device) override;
50 QIODevice *start() override;
51 void stop() override;
52 void reset() override;
53 void suspend() override;
54 void resume() override;
55 qsizetype bytesReady() const override;
56 void setBufferSize(qsizetype value) override;
57 qsizetype bufferSize() const override;
58 qint64 processedUSecs() const override;
59 QAudio::Error error() const override;
60 QAudio::State state() const override;
61 void setFormat(const QAudioFormat &format) override;
62 QAudioFormat format() const override;
63
64 void setVolume(qreal volume) override;
65 qreal volume() const override;
66
67private Q_SLOTS:
68 void newDataAvailable(GstSample *sample);
69
70private:
71 void setState(QAudio::State state);
72 void setError(QAudio::Error error);
73
74 QGstElement createAppSink();
75 static GstFlowReturn new_sample(GstAppSink *, gpointer user_data);
76 static void eos(GstAppSink *, gpointer user_data);
77
78 bool open();
79 void close();
80
81 static gboolean busMessage(GstBus *bus, GstMessage *msg, gpointer user_data);
82
83 QAudioDevice m_info;
84 qint64 m_bytesWritten = 0;
85 QIODevice *m_audioSink = nullptr;
86 QAudioFormat m_format;
87 QAudio::Error m_errorState = QAudio::NoError;
88 QAudio::State m_deviceState = QAudio::StoppedState;
89 qreal m_volume = 1.;
90
91 QRingBuffer m_buffer;
92 QAtomicInteger<bool> m_pullMode = true;
93 bool m_opened = false;
94 int m_bufferSize = 0;
95 qint64 m_elapsedTimeOffset = 0;
96 QElapsedTimer m_timeStamp;
97 QByteArray m_device;
98 QByteArray m_tempBuffer;
99
100 QGstElement gstInput;
101 QGstPipeline gstPipeline;
102 QGstElement gstVolume;
103 QGstElement gstAppSink;
104};
105
106class GStreamerInputPrivate : public QIODevice
107{
108 Q_OBJECT
109public:
110 GStreamerInputPrivate(QGStreamerAudioSource *audio);
111 ~GStreamerInputPrivate() {};
112
113 qint64 readData(char *data, qint64 len) override;
114 qint64 writeData(const char *data, qint64 len) override;
115 qint64 bytesAvailable() const override;
116 bool isSequential() const override { return true; }
117private:
118 QGStreamerAudioSource *m_audioDevice;
119};
120
121QT_END_NAMESPACE
122
123#endif
124

source code of qtmultimedia/src/plugins/multimedia/gstreamer/audio/qgstreameraudiosource_p.h