0374f0de5e
QGstreamerPlayerSession: Using GStreamer buffer probes to access media data. Change-Id: Ibc056283fdedaebba90456cc4e86ab63eae5f5f7 Reviewed-by: Michael Goddard <michael.goddard@nokia.com>
118 lines
3.4 KiB
C++
118 lines
3.4 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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**
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** This file is part of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qgstreamervideoprobecontrol.h"
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#include <private/qvideosurfacegstsink_p.h>
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#include <private/qgstvideobuffer_p.h>
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QGstreamerVideoProbeControl::QGstreamerVideoProbeControl(QObject *parent)
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: QMediaVideoProbeControl(parent)
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, m_flushing(false)
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, m_frameProbed(false)
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{
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}
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QGstreamerVideoProbeControl::~QGstreamerVideoProbeControl()
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{
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}
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void QGstreamerVideoProbeControl::startFlushing()
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{
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m_flushing = true;
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{
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QMutexLocker locker(&m_frameMutex);
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m_pendingFrame = QVideoFrame();
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}
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// only emit flush if at least one frame was probed
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if (m_frameProbed)
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emit flush();
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}
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void QGstreamerVideoProbeControl::stopFlushing()
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{
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m_flushing = false;
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}
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void QGstreamerVideoProbeControl::bufferProbed(GstBuffer* buffer)
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{
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if (m_flushing)
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return;
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GstCaps* caps = gst_buffer_get_caps(buffer);
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if (!caps)
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return;
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int bytesPerLine = 0;
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QVideoSurfaceFormat format = QVideoSurfaceGstSink::formatForCaps(caps, &bytesPerLine);
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gst_caps_unref(caps);
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if (!format.isValid() || !bytesPerLine)
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return;
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QVideoFrame frame = QVideoFrame(new QGstVideoBuffer(buffer, bytesPerLine),
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format.frameSize(), format.pixelFormat());
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QVideoSurfaceGstSink::setFrameTimeStamps(&frame, buffer);
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m_frameProbed = true;
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{
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QMutexLocker locker(&m_frameMutex);
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m_pendingFrame = frame;
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QMetaObject::invokeMethod(this, "frameProbed", Qt::QueuedConnection);
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}
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}
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void QGstreamerVideoProbeControl::frameProbed()
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{
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QVideoFrame frame;
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{
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QMutexLocker locker(&m_frameMutex);
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if (!m_pendingFrame.isValid())
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return;
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frame = m_pendingFrame;
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}
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emit videoFrameProbed(frame);
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}
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