slapin/qtmultimedia
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Initial copy of QtMultimediaKit.

Browse Source 
Comes from original repo, with SHA1:
2c82d5611655e5967f5c5095af50c0991c4378b2
This commit is contained in:
Michael Goddard
2011-06-29 13:38:46 +10:00
commit 2a34e88c1e
1048 changed files with 206259 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

346
src/plugins/gstreamer/camerabin/camerabinvideoencoder.cpp Normal file
View File

@@ -0,0 +1,346 @@
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "camerabinvideoencoder.h"
#include "camerabinsession.h"
#include "camerabincontainer.h"
#include <QtCore/qdebug.h>
CameraBinVideoEncoder::CameraBinVideoEncoder(CameraBinSession *session)
:QVideoEncoderControl(session), m_session(session)
{
QList<QByteArray> codecCandidates;
#if defined(Q_WS_MAEMO_5)
codecCandidates << "video/mpeg4" << "video/h264" << "video/h263" << "video/theora"
<< "video/mpeg2" << "video/mpeg1" << "video/mjpeg" << "video/VP8" << "video/h261";
m_elementNames["video/h264"] = "dsph264enc";
m_elementNames["video/mpeg4"] = "dspmp4venc";
m_elementNames["video/h263"] = "dsph263enc";
m_elementNames["video/theora"] = "theoraenc";
m_elementNames["video/mpeg2"] = "ffenc_mpeg2video";
m_elementNames["video/mpeg1"] = "ffenc_mpeg1video";
m_elementNames["video/mjpeg"] = "ffenc_mjpeg";
m_elementNames["video/VP8"] = "vp8enc";
m_elementNames["video/h261"] = "ffenc_h261";
m_codecOptions["video/mpeg4"] = QStringList() << "mode" << "keyframe-interval";
#elif defined(Q_WS_MAEMO_6)
codecCandidates << "video/mpeg4" << "video/h264" << "video/h263";
m_elementNames["video/h264"] = "dsph264enc";
m_elementNames["video/mpeg4"] = "dsphdmp4venc";
m_elementNames["video/h263"] = "dsph263enc";
QStringList options = QStringList() << "mode" << "keyframe-interval" << "max-bitrate" << "intra-refresh";
m_codecOptions["video/h264"] = options;
m_codecOptions["video/mpeg4"] = options;
m_codecOptions["video/h263"] = options;
#else
codecCandidates << "video/h264" << "video/xvid" << "video/mpeg4"
<< "video/mpeg1" << "video/mpeg2" << "video/theora"
<< "video/VP8" << "video/h261" << "video/mjpeg";
m_elementNames["video/h264"] = "x264enc";
m_elementNames["video/xvid"] = "xvidenc";
m_elementNames["video/mpeg4"] = "ffenc_mpeg4";
m_elementNames["video/mpeg1"] = "ffenc_mpeg1video";
m_elementNames["video/mpeg2"] = "ffenc_mpeg2video";
m_elementNames["video/theora"] = "theoraenc";
m_elementNames["video/mjpeg"] = "ffenc_mjpeg";
m_elementNames["video/VP8"] = "vp8enc";
m_elementNames["video/h261"] = "ffenc_h261";
m_codecOptions["video/h264"] = QStringList() << "quantizer";
m_codecOptions["video/xvid"] = QStringList() << "quantizer" << "profile";
m_codecOptions["video/mpeg4"] = QStringList() << "quantizer";
m_codecOptions["video/mpeg1"] = QStringList() << "quantizer";
m_codecOptions["video/mpeg2"] = QStringList() << "quantizer";
m_codecOptions["video/theora"] = QStringList();
#endif
foreach( const QByteArray& codecName, codecCandidates ) {
QByteArray elementName = m_elementNames[codecName];
GstElementFactory *factory = gst_element_factory_find(elementName.constData());
if (factory) {
m_codecs.append(codecName);
const gchar *descr = gst_element_factory_get_description(factory);
m_codecDescriptions.insert(codecName, QString::fromUtf8(descr));
m_streamTypes.insert(codecName,
CameraBinContainer::supportedStreamTypes(factory, GST_PAD_SRC));
gst_object_unref(GST_OBJECT(factory));
}
}
}
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;
}
QString CameraBinVideoEncoder::videoCodecDescription(const QString &codecName) const
{
return m_codecDescriptions.value(codecName);
}
QStringList CameraBinVideoEncoder::supportedEncodingOptions(const QString &codec) const
{
return m_codecOptions.value(codec);
}
QVariant CameraBinVideoEncoder::encodingOption(const QString &codec, const QString &name) const
{
return m_options[codec].value(name);
}
void CameraBinVideoEncoder::setEncodingOption(
const QString &codec, const QString &name, const QVariant &value)
{
m_options[codec][name] = value;
}
QVideoEncoderSettings CameraBinVideoEncoder::videoSettings() const
{
return m_videoSettings;
}
void CameraBinVideoEncoder::setVideoSettings(const QVideoEncoderSettings &settings)
{
m_videoSettings = settings;
m_userSettings = settings;
emit settingsChanged();
}
void CameraBinVideoEncoder::setActualVideoSettings(const QVideoEncoderSettings &settings)
{
m_videoSettings = settings;
}
void CameraBinVideoEncoder::resetActualSettings()
{
m_videoSettings = m_userSettings;
}
GstElement *CameraBinVideoEncoder::createEncoder()
{
QString codec = m_videoSettings.codec();
QByteArray elementName = m_elementNames.value(codec);
GstElement *encoderElement = gst_element_factory_make( elementName.constData(), "video-encoder");
if (encoderElement) {
if (m_videoSettings.encodingMode() == QtMultimediaKit::ConstantQualityEncoding) {
QtMultimediaKit::EncodingQuality qualityValue = m_videoSettings.quality();
if (elementName == "x264enc") {
//constant quantizer mode
g_object_set(G_OBJECT(encoderElement), "pass", 4, NULL);
int qualityTable[] = {
50, //VeryLow
35, //Low
21, //Normal
15, //High
8 //VeryHigh
};
g_object_set(G_OBJECT(encoderElement), "quantizer", qualityTable[qualityValue], NULL);
} else if (elementName == "xvidenc") {
//constant quantizer mode
g_object_set(G_OBJECT(encoderElement), "pass", 3, NULL);
int qualityTable[] = {
32, //VeryLow
12, //Low
5, //Normal
3, //High
2 //VeryHigh
};
int quant = qualityTable[qualityValue];
g_object_set(G_OBJECT(encoderElement), "quantizer", quant, NULL);
} else if (elementName == "ffenc_mpeg4" ||
elementName == "ffenc_mpeg1video" ||
elementName == "ffenc_mpeg2video" ) {
//constant quantizer mode
g_object_set(G_OBJECT(encoderElement), "pass", 2, NULL);
//quant from 1 to 30, default ~3
double qualityTable[] = {
20, //VeryLow
8.0, //Low
3.0, //Normal
2.5, //High
2.0 //VeryHigh
};
double quant = qualityTable[qualityValue];
g_object_set(G_OBJECT(encoderElement), "quantizer", quant, NULL);
} else if (elementName == "theoraenc") {
int qualityTable[] = {
8, //VeryLow
16, //Low
32, //Normal
45, //High
60 //VeryHigh
};
//quality from 0 to 63
int quality = qualityTable[qualityValue];
g_object_set(G_OBJECT(encoderElement), "quality", quality, NULL);
} else if (elementName == "dsph264enc" ||
elementName == "dspmp4venc" ||
elementName == "dsphdmp4venc" ||
elementName == "dsph263enc") {
//only bitrate parameter is supported
int qualityTable[] = {
1000000, //VeryLow
2000000, //Low
4000000, //Normal
8000000, //High
16000000 //VeryHigh
};
int bitrate = qualityTable[qualityValue];
g_object_set(G_OBJECT(encoderElement), "bitrate", bitrate, NULL);
}
} else {
int bitrate = m_videoSettings.bitRate();
if (bitrate > 0) {
g_object_set(G_OBJECT(encoderElement), "bitrate", bitrate, NULL);
}
}
QMap<QString,QVariant> options = m_options.value(codec);
QMapIterator<QString,QVariant> it(options);
while (it.hasNext()) {
it.next();
QString option = it.key();
QVariant value = it.value();
switch (value.type()) {
case QVariant::Int:
g_object_set(G_OBJECT(encoderElement), option.toAscii(), value.toInt(), NULL);
break;
case QVariant::Bool:
g_object_set(G_OBJECT(encoderElement), option.toAscii(), value.toBool(), NULL);
break;
case QVariant::Double:
g_object_set(G_OBJECT(encoderElement), option.toAscii(), value.toDouble(), NULL);
break;
case QVariant::String:
g_object_set(G_OBJECT(encoderElement), option.toAscii(), value.toString().toUtf8().constData(), NULL);
break;
default:
qWarning() << "unsupported option type:" << option << value;
break;
}
}
}
return encoderElement;
}
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>();
}
QSet<QString> CameraBinVideoEncoder::supportedStreamTypes(const QString &codecName) const
{
return m_streamTypes.value(codecName);
}