author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 03 May 2010 13:18:40 +0300 | |
changeset 4 | 90517678cc4f |
child 11 | 06b8e2af4411 |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (qt-info@nokia.com) |
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** |
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** This file is part of the Qt Mobility Components. |
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** |
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** $QT_BEGIN_LICENSE:LGPL$ |
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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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** |
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** GNU Lesser General Public License Usage |
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** Alternatively, this file may be used under the terms of the GNU Lesser |
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** General Public License version 2.1 as published by the Free Software |
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** Foundation and appearing in the file LICENSE.LGPL included in the |
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** packaging of this file. Please review the following information to |
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** ensure the GNU Lesser General Public License version 2.1 requirements |
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** will be met: 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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** If you have questions regarding the use of this file, please contact |
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** Nokia at qt-info@nokia.com. |
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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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** |
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** |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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#include "qgstreamervideoencode_maemo.h" |
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#include "qgstreamercapturesession_maemo.h" |
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#include "qgstreamermediacontainercontrol_maemo.h" |
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#include <QtCore/qdebug.h> |
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QGstreamerVideoEncode::QGstreamerVideoEncode(QGstreamerCaptureSession *session) |
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:QVideoEncoderControl(session), m_session(session) |
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{ |
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QList<QByteArray> codecCandidates; |
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codecCandidates << "video/mpeg4"; //"video/h264" << "video/xvid" << "video/mpeg4" << "video/mpeg1" << "video/mpeg2" << "video/theora"; |
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m_elementNames["video/mpeg4"] = "dspmp4venc"; |
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m_codecOptions["video/mpeg4"] = QStringList() << "quantizer"; |
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foreach( const QByteArray& codecName, codecCandidates ) { |
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QByteArray elementName = m_elementNames[codecName]; |
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GstElementFactory *factory = gst_element_factory_find(elementName.constData()); |
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if (factory) { |
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m_codecs.append(codecName); |
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const gchar *descr = gst_element_factory_get_description(factory); |
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m_codecDescriptions.insert(codecName, QString::fromUtf8(descr)); |
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m_streamTypes.insert(codecName, |
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QGstreamerMediaContainerControl::supportedStreamTypes(factory, GST_PAD_SRC)); |
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gst_object_unref(GST_OBJECT(factory)); |
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} |
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} |
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if (!m_codecs.isEmpty()) |
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m_videoSettings.setCodec(m_codecs[0]); |
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} |
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QGstreamerVideoEncode::~QGstreamerVideoEncode() |
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{ |
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} |
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QList<QSize> QGstreamerVideoEncode::supportedResolutions(const QVideoEncoderSettings &, bool *continuous) const |
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{ |
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if (continuous) |
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*continuous = m_session->videoInput() != 0; |
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return m_session->videoInput() ? m_session->videoInput()->supportedResolutions() : QList<QSize>(); |
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} |
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QList< qreal > QGstreamerVideoEncode::supportedFrameRates(const QVideoEncoderSettings &, bool *continuous) const |
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{ |
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if (continuous) |
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*continuous = false; |
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return m_session->videoInput() ? m_session->videoInput()->supportedFrameRates() : QList<qreal>(); |
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} |
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QStringList QGstreamerVideoEncode::supportedVideoCodecs() const |
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{ |
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return m_codecs; |
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} |
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QString QGstreamerVideoEncode::videoCodecDescription(const QString &codecName) const |
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{ |
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return m_codecDescriptions.value(codecName); |
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} |
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QStringList QGstreamerVideoEncode::supportedEncodingOptions(const QString &codec) const |
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{ |
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return m_codecOptions.value(codec); |
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} |
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QVariant QGstreamerVideoEncode::encodingOption(const QString &codec, const QString &name) const |
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{ |
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return m_options[codec].value(name); |
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} |
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void QGstreamerVideoEncode::setEncodingOption( |
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const QString &codec, const QString &name, const QVariant &value) |
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{ |
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m_options[codec][name] = value; |
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} |
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QVideoEncoderSettings QGstreamerVideoEncode::videoSettings() const |
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{ |
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return m_videoSettings; |
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} |
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void QGstreamerVideoEncode::setVideoSettings(const QVideoEncoderSettings &settings) |
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{ |
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m_videoSettings = settings; |
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} |
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GstElement *QGstreamerVideoEncode::createEncoder() |
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{ |
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QString codec = m_videoSettings.codec(); |
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GstElement *encoderElement = gst_element_factory_make( m_elementNames.value(codec).constData(), "video-encoder"); |
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return encoderElement; |
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} |
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141 |
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QPair<int,int> QGstreamerVideoEncode::rateAsRational() const |
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{ |
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qreal frameRate = m_videoSettings.frameRate(); |
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if (frameRate > 0.001) { |
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//convert to rational number |
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QList<int> denumCandidates; |
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denumCandidates << 1 << 2 << 3 << 5 << 10 << 1001 << 1000; |
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qreal error = 1.0; |
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int num = 1; |
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int denum = 1; |
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|
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foreach (int curDenum, denumCandidates) { |
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int curNum = qRound(frameRate*curDenum); |
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qreal curError = qAbs(qreal(curNum)/curDenum - frameRate); |
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|
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if (curError < error) { |
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error = curError; |
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num = curNum; |
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denum = curDenum; |
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} |
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if (curError < 1e-8) |
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break; |
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} |
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return QPair<int,int>(num,denum); |
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} |
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|
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return QPair<int,int>(); |
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} |
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|
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|
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QSet<QString> QGstreamerVideoEncode::supportedStreamTypes(const QString &codecName) const |
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{ |
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return m_streamTypes.value(codecName); |
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} |