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39
40#ifndef QGSTREAMERPLAYERSESSION_H
41#define QGSTREAMERPLAYERSESSION_H
42
43#include <QtMultimedia/private/qtmultimediaglobal_p.h>
44#include <QObject>
45#include <QtCore/qmutex.h>
46#include "qgstreameraudiodecodercontrol.h"
47#include <private/qgstreamerbushelper_p.h>
48#include "qaudiodecoder.h"
49
50#if QT_CONFIG(gstreamer_app)
51#include <private/qgstappsrc_p.h>
52#endif
53
54#include <gst/gst.h>
55#include <gst/app/gstappsink.h>
56
57QT_BEGIN_NAMESPACE
58
59class QGstreamerBusHelper;
60class QGstreamerMessage;
61
62class QGstreamerAudioDecoderSession : public QObject,
63 public QGstreamerBusMessageFilter
64{
65Q_OBJECT
66Q_INTERFACES(QGstreamerBusMessageFilter)
67
68public:
69 QGstreamerAudioDecoderSession(QObject *parent);
70 virtual ~QGstreamerAudioDecoderSession();
71
72 QGstreamerBusHelper *bus() const { return m_busHelper; }
73
74 QAudioDecoder::State state() const { return m_state; }
75 QAudioDecoder::State pendingState() const { return m_pendingState; }
76
77 bool processBusMessage(const QGstreamerMessage &message) override;
78
79#if QT_CONFIG(gstreamer_app)
80 QGstAppSrc *appsrc() const { return m_appSrc; }
81 static void configureAppSrcElement(GObject*, GObject*, GParamSpec*,QGstreamerAudioDecoderSession* _this);
82#endif
83
84 QString sourceFilename() const;
85 void setSourceFilename(const QString &fileName);
86
87 QIODevice* sourceDevice() const;
88 void setSourceDevice(QIODevice *device);
89
90 void start();
91 void stop();
92
93 QAudioFormat audioFormat() const;
94 void setAudioFormat(const QAudioFormat &format);
95
96 QAudioBuffer read();
97 bool bufferAvailable() const;
98
99 qint64 position() const;
100 qint64 duration() const;
101
102 static GstFlowReturn new_sample(GstAppSink *sink, gpointer user_data);
103
104signals:
105 void stateChanged(QAudioDecoder::State newState);
106 void formatChanged(const QAudioFormat &format);
107 void sourceChanged();
108
109 void error(int error, const QString &errorString);
110
111 void bufferReady();
112 void bufferAvailableChanged(bool available);
113 void finished();
114
115 void positionChanged(qint64 position);
116 void durationChanged(qint64 duration);
117
118private slots:
119 void updateDuration();
120
121private:
122 void setAudioFlags(bool wantNativeAudio);
123 void addAppSink();
124 void removeAppSink();
125
126 void processInvalidMedia(QAudioDecoder::Error errorCode, const QString& errorString);
127 static qint64 getPositionFromBuffer(GstBuffer* buffer);
128
129 QAudioDecoder::State m_state;
130 QAudioDecoder::State m_pendingState;
131 QGstreamerBusHelper *m_busHelper;
132 GstBus *m_bus;
133 GstElement *m_playbin;
134 GstElement *m_outputBin;
135 GstElement *m_audioConvert;
136 GstAppSink *m_appSink;
137
138#if QT_CONFIG(gstreamer_app)
139 QGstAppSrc *m_appSrc;
140#endif
141
142 QString mSource;
143 QIODevice *mDevice; // QWeakPointer perhaps
144 QAudioFormat mFormat;
145
146 mutable QMutex m_buffersMutex;
147 int m_buffersAvailable;
148
149 qint64 m_position;
150 qint64 m_duration;
151
152 int m_durationQueries;
153};
154
155QT_END_NAMESPACE
156
157#endif // QGSTREAMERPLAYERSESSION_H
158

source code of qtmultimedia/src/plugins/gstreamer/audiodecoder/qgstreameraudiodecodersession.h