|
1 /**************************************************************************** |
|
2 ** |
|
3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
|
4 ** All rights reserved. |
|
5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
|
6 ** |
|
7 ** This file is part of the Qt Mobility Components. |
|
8 ** |
|
9 ** $QT_BEGIN_LICENSE:LGPL$ |
|
10 ** No Commercial Usage |
|
11 ** This file contains pre-release code and may not be distributed. |
|
12 ** You may use this file in accordance with the terms and conditions |
|
13 ** contained in the Technology Preview License Agreement accompanying |
|
14 ** this package. |
|
15 ** |
|
16 ** GNU Lesser General Public License Usage |
|
17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
|
18 ** General Public License version 2.1 as published by the Free Software |
|
19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
|
20 ** packaging of this file. Please review the following information to |
|
21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
|
22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
|
23 ** |
|
24 ** In addition, as a special exception, Nokia gives you certain additional |
|
25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
|
26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
|
27 ** |
|
28 ** If you have questions regarding the use of this file, please contact |
|
29 ** Nokia at qt-info@nokia.com. |
|
30 ** |
|
31 ** |
|
32 ** |
|
33 ** |
|
34 ** |
|
35 ** |
|
36 ** |
|
37 ** |
|
38 ** $QT_END_LICENSE$ |
|
39 ** |
|
40 ****************************************************************************/ |
|
41 |
|
42 #include <QMap> |
|
43 #include <QTimer> |
|
44 #include <QMutex> |
|
45 |
|
46 #include "qgstreamerbushelper.h" |
|
47 |
|
48 |
|
49 #ifndef QT_NO_GLIB |
|
50 class QGstreamerBusHelperPrivate : public QObject |
|
51 { |
|
52 Q_OBJECT |
|
53 |
|
54 public: |
|
55 void addWatch(GstBus* bus, QGstreamerBusHelper* helper) |
|
56 { |
|
57 setParent(helper); |
|
58 m_tag = gst_bus_add_watch_full(bus, 0, busCallback, this, NULL); |
|
59 m_helper = helper; |
|
60 filter = 0; |
|
61 } |
|
62 |
|
63 void removeWatch(QGstreamerBusHelper* helper) |
|
64 { |
|
65 Q_UNUSED(helper); |
|
66 g_source_remove(m_tag); |
|
67 } |
|
68 |
|
69 static QGstreamerBusHelperPrivate* instance() |
|
70 { |
|
71 return new QGstreamerBusHelperPrivate; |
|
72 } |
|
73 |
|
74 private: |
|
75 void processMessage(GstBus* bus, GstMessage* message) |
|
76 { |
|
77 Q_UNUSED(bus); |
|
78 emit m_helper->message(message); |
|
79 } |
|
80 |
|
81 static gboolean busCallback(GstBus *bus, GstMessage *message, gpointer data) |
|
82 { |
|
83 reinterpret_cast<QGstreamerBusHelperPrivate*>(data)->processMessage(bus, message); |
|
84 return TRUE; |
|
85 } |
|
86 |
|
87 guint m_tag; |
|
88 QGstreamerBusHelper* m_helper; |
|
89 |
|
90 public: |
|
91 GstBus* bus; |
|
92 QGstreamerSyncEventFilter *filter; |
|
93 QMutex filterMutex; |
|
94 }; |
|
95 |
|
96 #else |
|
97 |
|
98 class QGstreamerBusHelperPrivate : public QObject |
|
99 { |
|
100 Q_OBJECT |
|
101 typedef QMap<QGstreamerBusHelper*, GstBus*> HelperMap; |
|
102 |
|
103 public: |
|
104 void addWatch(GstBus* bus, QGstreamerBusHelper* helper) |
|
105 { |
|
106 m_helperMap.insert(helper, bus); |
|
107 |
|
108 if (m_helperMap.size() == 1) |
|
109 m_intervalTimer->start(); |
|
110 } |
|
111 |
|
112 void removeWatch(QGstreamerBusHelper* helper) |
|
113 { |
|
114 m_helperMap.remove(helper); |
|
115 |
|
116 if (m_helperMap.size() == 0) |
|
117 m_intervalTimer->stop(); |
|
118 } |
|
119 |
|
120 static QGstreamerBusHelperPrivate* instance() |
|
121 { |
|
122 static QGstreamerBusHelperPrivate self; |
|
123 |
|
124 return &self; |
|
125 } |
|
126 |
|
127 private slots: |
|
128 void interval() |
|
129 { |
|
130 for (HelperMap::iterator it = m_helperMap.begin(); it != m_helperMap.end(); ++it) { |
|
131 GstMessage* message; |
|
132 |
|
133 while ((message = gst_bus_poll(it.value(), GST_MESSAGE_ANY, 0)) != 0) { |
|
134 emit it.key()->message(message); |
|
135 gst_message_unref(message); |
|
136 } |
|
137 |
|
138 emit it.key()->message(QGstreamerMessage()); |
|
139 } |
|
140 } |
|
141 |
|
142 private: |
|
143 QGstreamerBusHelperPrivate() |
|
144 { |
|
145 m_intervalTimer = new QTimer(this); |
|
146 m_intervalTimer->setInterval(250); |
|
147 |
|
148 connect(m_intervalTimer, SIGNAL(timeout()), SLOT(interval())); |
|
149 } |
|
150 |
|
151 HelperMap m_helperMap; |
|
152 QTimer* m_intervalTimer; |
|
153 |
|
154 public: |
|
155 GstBus* bus; |
|
156 QGstreamerSyncEventFilter *filter; |
|
157 QMutex filterMutex; |
|
158 }; |
|
159 #endif |
|
160 |
|
161 |
|
162 static GstBusSyncReply syncGstBusFilter(GstBus* bus, GstMessage* message, QGstreamerBusHelperPrivate *d) |
|
163 { |
|
164 Q_UNUSED(bus); |
|
165 QMutexLocker lock(&d->filterMutex); |
|
166 |
|
167 bool res = false; |
|
168 |
|
169 if (d->filter) |
|
170 res = d->filter->processSyncMessage(QGstreamerMessage(message)); |
|
171 |
|
172 return res ? GST_BUS_DROP : GST_BUS_PASS; |
|
173 } |
|
174 |
|
175 |
|
176 /*! |
|
177 \class gstreamer::QGstreamerBusHelper |
|
178 \internal |
|
179 */ |
|
180 |
|
181 QGstreamerBusHelper::QGstreamerBusHelper(GstBus* bus, QObject* parent): |
|
182 QObject(parent), |
|
183 d(QGstreamerBusHelperPrivate::instance()) |
|
184 { |
|
185 d->bus = bus; |
|
186 d->addWatch(bus, this); |
|
187 |
|
188 gst_bus_set_sync_handler(bus, (GstBusSyncHandler)syncGstBusFilter, d); |
|
189 } |
|
190 |
|
191 QGstreamerBusHelper::~QGstreamerBusHelper() |
|
192 { |
|
193 d->removeWatch(this); |
|
194 gst_bus_set_sync_handler(d->bus,0,0); |
|
195 } |
|
196 |
|
197 void QGstreamerBusHelper::installSyncEventFilter(QGstreamerSyncEventFilter *filter) |
|
198 { |
|
199 QMutexLocker lock(&d->filterMutex); |
|
200 d->filter = filter; |
|
201 } |
|
202 |
|
203 #include "qgstreamerbushelper.moc" |