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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 "camerabinvideoencoder.h"
#include "camerabinsession.h"
#include "camerabincontainer.h"
#include <QtCore/qdebug.h>
QT_BEGIN_NAMESPACE
CameraBinVideoEncoder::CameraBinVideoEncoder(CameraBinSession *session)
:QVideoEncoderSettingsControl(session),
m_session(session),
m_codecs(QGstCodecsInfo::VideoEncoder)
{
}
CameraBinVideoEncoder::~CameraBinVideoEncoder()
{
}
QList<QSize> CameraBinVideoEncoder::supportedResolutions(const QVideoEncoderSettings &settings, bool *continuous) const
{
if (continuous)
*continuous = false;
QPair<int,int> rate = rateAsRational(settings.frameRate());
//select the closest supported rational rate to settings.frameRate()
return m_session->supportedResolutions(rate, continuous, QCamera::CaptureVideo);
}
QList< qreal > CameraBinVideoEncoder::supportedFrameRates(const QVideoEncoderSettings &settings, bool *continuous) const
{
if (continuous)
*continuous = false;
QList< qreal > res;
QPair<int,int> rate;
foreach(rate, m_session->supportedFrameRates(settings.resolution(), continuous)) {
if (rate.second > 0)
res << qreal(rate.first)/rate.second;
}
return res;
}
QStringList CameraBinVideoEncoder::supportedVideoCodecs() const
{
return m_codecs.supportedCodecs();
}
QString CameraBinVideoEncoder::videoCodecDescription(const QString &codecName) const
{
return m_codecs.codecDescription(codecName);
}
QVideoEncoderSettings CameraBinVideoEncoder::videoSettings() const
{
return m_videoSettings;
}
void CameraBinVideoEncoder::setVideoSettings(const QVideoEncoderSettings &settings)
{
if (m_videoSettings != settings) {
m_actualVideoSettings = settings;
m_videoSettings = settings;
emit settingsChanged();
}
}
QVideoEncoderSettings CameraBinVideoEncoder::actualVideoSettings() const
{
return m_actualVideoSettings;
}
void CameraBinVideoEncoder::setActualVideoSettings(const QVideoEncoderSettings &settings)
{
m_actualVideoSettings = settings;
}
void CameraBinVideoEncoder::resetActualSettings()
{
m_actualVideoSettings = m_videoSettings;
}
QPair<int,int> CameraBinVideoEncoder::rateAsRational(qreal frameRate) const
{
if (frameRate > 0.001) {
//convert to rational number
QList<int> denumCandidates;
denumCandidates << 1 << 2 << 3 << 5 << 10 << 25 << 30 << 50 << 100 << 1001 << 1000;
qreal error = 1.0;
int num = 1;
int denum = 1;
foreach (int curDenum, denumCandidates) {
int curNum = qRound(frameRate*curDenum);
qreal curError = qAbs(qreal(curNum)/curDenum - frameRate);
if (curError < error) {
error = curError;
num = curNum;
denum = curDenum;
}
if (curError < 1e-8)
break;
}
return QPair<int,int>(num,denum);
}
return QPair<int,int>();
}
GstEncodingProfile *CameraBinVideoEncoder::createProfile()
{
QString codec = m_actualVideoSettings.codec();
QString preset = m_actualVideoSettings.encodingOption(QStringLiteral("preset")).toString();
GstCaps *caps;
if (codec.isEmpty())
caps = 0;
else
caps = gst_caps_from_string(codec.toLatin1());
GstEncodingVideoProfile *profile = gst_encoding_video_profile_new(
caps,
!preset.isEmpty() ? preset.toLatin1().constData() : NULL, //preset
NULL, //restriction
1); //presence
gst_encoding_video_profile_set_pass(profile, 0);
gst_encoding_video_profile_set_variableframerate(profile, TRUE);
return (GstEncodingProfile *)profile;
}
QT_END_NAMESPACE
|
