1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#include "qgstreameraudioprobecontrol_p.h"
41#include <private/qgstutils_p.h>
42
43QGstreamerAudioProbeControl::QGstreamerAudioProbeControl(QObject *parent)
44 : QMediaAudioProbeControl(parent)
45{
46}
47
48QGstreamerAudioProbeControl::~QGstreamerAudioProbeControl()
49{
50}
51
52void QGstreamerAudioProbeControl::probeCaps(GstCaps *caps)
53{
54 QAudioFormat format = QGstUtils::audioFormatForCaps(caps);
55
56 QMutexLocker locker(&m_bufferMutex);
57 m_format = format;
58}
59
60bool QGstreamerAudioProbeControl::probeBuffer(GstBuffer *buffer)
61{
62 qint64 position = GST_BUFFER_TIMESTAMP(buffer);
63 position = position >= 0
64 ? position / G_GINT64_CONSTANT(1000) // microseconds
65 : -1;
66
67 QByteArray data;
68#if GST_CHECK_VERSION(1,0,0)
69 GstMapInfo info;
70 if (gst_buffer_map(buffer, info: &info, flags: GST_MAP_READ)) {
71 data = QByteArray(reinterpret_cast<const char *>(info.data), info.size);
72 gst_buffer_unmap(buffer, info: &info);
73 } else {
74 return true;
75 }
76#else
77 data = QByteArray(reinterpret_cast<const char *>(buffer->data), buffer->size);
78#endif
79
80 QMutexLocker locker(&m_bufferMutex);
81 if (m_format.isValid()) {
82 if (!m_pendingBuffer.isValid())
83 QMetaObject::invokeMethod(obj: this, member: "bufferProbed", type: Qt::QueuedConnection);
84 m_pendingBuffer = QAudioBuffer(data, m_format, position);
85 }
86
87 return true;
88}
89
90void QGstreamerAudioProbeControl::bufferProbed()
91{
92 QAudioBuffer audioBuffer;
93 {
94 QMutexLocker locker(&m_bufferMutex);
95 if (!m_pendingBuffer.isValid())
96 return;
97 audioBuffer = m_pendingBuffer;
98 m_pendingBuffer = QAudioBuffer();
99 }
100 emit audioBufferProbed(buffer: audioBuffer);
101}
102

source code of qtmultimedia/src/gsttools/qgstreameraudioprobecontrol.cpp