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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qgstreamervideoprobecontrol_p.h"
#include <private/qvideosurfacegstsink_p.h>
#include <private/qgstvideobuffer_p.h>
QGstreamerVideoProbeControl::QGstreamerVideoProbeControl(QObject *parent)
: QMediaVideoProbeControl(parent)
, m_flushing(false)
, m_frameProbed(false)
{
}
QGstreamerVideoProbeControl::~QGstreamerVideoProbeControl()
{
}
void QGstreamerVideoProbeControl::startFlushing()
{
m_flushing = true;
{
QMutexLocker locker(&m_frameMutex);
m_pendingFrame = QVideoFrame();
}
// only emit flush if at least one frame was probed
if (m_frameProbed)
emit flush();
}
void QGstreamerVideoProbeControl::stopFlushing()
{
m_flushing = false;
}
void QGstreamerVideoProbeControl::bufferProbed(GstBuffer* buffer)
{
if (m_flushing)
return;
GstCaps* caps = gst_buffer_get_caps(buffer);
if (!caps)
return;
int bytesPerLine = 0;
QVideoSurfaceFormat format = QVideoSurfaceGstSink::formatForCaps(caps, &bytesPerLine);
gst_caps_unref(caps);
if (!format.isValid() || !bytesPerLine)
return;
QVideoFrame frame = QVideoFrame(new QGstVideoBuffer(buffer, bytesPerLine),
format.frameSize(), format.pixelFormat());
QVideoSurfaceGstSink::setFrameTimeStamps(&frame, buffer);
m_frameProbed = true;
{
QMutexLocker locker(&m_frameMutex);
m_pendingFrame = frame;
QMetaObject::invokeMethod(this, "frameProbed", Qt::QueuedConnection);
}
}
void QGstreamerVideoProbeControl::frameProbed()
{
QVideoFrame frame;
{
QMutexLocker locker(&m_frameMutex);
if (!m_pendingFrame.isValid())
return;
frame = m_pendingFrame;
}
emit videoFrameProbed(frame);
}
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