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    41 

    42 #include "qgstreamervideoencode_maemo.h"

    43 #include "qgstreamercapturesession_maemo.h"

    44 #include "qgstreamermediacontainercontrol_maemo.h"

    45 

    46 #include <QtCore/qdebug.h>

    47 

    48 QGstreamerVideoEncode::QGstreamerVideoEncode(QGstreamerCaptureSession *session)

    49     :QVideoEncoderControl(session), m_session(session)

    50 {

    51     QList<QByteArray> codecCandidates;

    52     codecCandidates << "video/mpeg4"; //"video/h264" << "video/xvid" << "video/mpeg4" << "video/mpeg1" << "video/mpeg2" << "video/theora";

    53 

    54     m_elementNames["video/mpeg4"] = "dspmp4venc";

    55 

    56     m_codecOptions["video/mpeg4"] = QStringList() << "quantizer";

    57 

    58     foreach( const QByteArray& codecName, codecCandidates ) {

    59         QByteArray elementName = m_elementNames[codecName];

    60         GstElementFactory *factory = gst_element_factory_find(elementName.constData());

    61         if (factory) {

    62             m_codecs.append(codecName);

    63             const gchar *descr = gst_element_factory_get_description(factory);

    64             m_codecDescriptions.insert(codecName, QString::fromUtf8(descr));

    65 

    66             m_streamTypes.insert(codecName,

    67                                  QGstreamerMediaContainerControl::supportedStreamTypes(factory, GST_PAD_SRC));

    68 

    69             gst_object_unref(GST_OBJECT(factory));

    70         }

    71     }

    72 

    73     if (!m_codecs.isEmpty())

    74         m_videoSettings.setCodec(m_codecs[0]);

    75 }

    76 

    77 QGstreamerVideoEncode::~QGstreamerVideoEncode()

    78 {

    79 }

    80 

    81 QList<QSize> QGstreamerVideoEncode::supportedResolutions(const QVideoEncoderSettings &, bool *continuous) const

    82 {

    83     if (continuous)

    84         *continuous = m_session->videoInput() != 0;

    85 

    86     return m_session->videoInput() ? m_session->videoInput()->supportedResolutions() : QList<QSize>();

    87 }

    88 

    89 QList< qreal > QGstreamerVideoEncode::supportedFrameRates(const QVideoEncoderSettings &, bool *continuous) const

    90 {

    91     if (continuous)

    92         *continuous = false;

    93 

    94     return m_session->videoInput() ? m_session->videoInput()->supportedFrameRates() : QList<qreal>();

    95 }

    96 

    97 QStringList QGstreamerVideoEncode::supportedVideoCodecs() const

    98 {

    99     return m_codecs;

   100 }

   101 

   102 QString QGstreamerVideoEncode::videoCodecDescription(const QString &codecName) const

   103 {

   104     return m_codecDescriptions.value(codecName);

   105 }

   106 

   107 QStringList QGstreamerVideoEncode::supportedEncodingOptions(const QString &codec) const

   108 {

   109     return m_codecOptions.value(codec);

   110 }

   111 

   112 QVariant QGstreamerVideoEncode::encodingOption(const QString &codec, const QString &name) const

   113 {

   114     return m_options[codec].value(name);

   115 }

   116 

   117 void QGstreamerVideoEncode::setEncodingOption(

   118         const QString &codec, const QString &name, const QVariant &value)

   119 {

   120     m_options[codec][name] = value;

   121 }

   122 

   123 QVideoEncoderSettings QGstreamerVideoEncode::videoSettings() const

   124 {

   125     return m_videoSettings;

   126 }

   127 

   128 void QGstreamerVideoEncode::setVideoSettings(const QVideoEncoderSettings &settings)

   129 {

   130     m_videoSettings = settings;

   131 }

   132 

   133 GstElement *QGstreamerVideoEncode::createEncoder()

   134 {

   135     QString codec = m_videoSettings.codec();

   136 

   137     GstElement *encoderElement = gst_element_factory_make( m_elementNames.value(codec).constData(), "video-encoder");

   138 

   139     return encoderElement;

   140 }

   141 

   142 QPair<int,int> QGstreamerVideoEncode::rateAsRational() const

   143 {

   144     qreal frameRate = m_videoSettings.frameRate();

   145 

   146     if (frameRate > 0.001) {

   147         //convert to rational number

   148         QList<int> denumCandidates;

   149         denumCandidates << 1 << 2 << 3 << 5 << 10 << 1001 << 1000;

   150 

   151         qreal error = 1.0;

   152         int num = 1;

   153         int denum = 1;

   154 

   155         foreach (int curDenum, denumCandidates) {

   156             int curNum = qRound(frameRate*curDenum);

   157             qreal curError = qAbs(qreal(curNum)/curDenum - frameRate);

   158 

   159             if (curError < error) {

   160                 error = curError;

   161                 num = curNum;

   162                 denum = curDenum;

   163             }

   164 

   165             if (curError < 1e-8)

   166                 break;

   167         }

   168 

   169         return QPair<int,int>(num,denum);

   170     }

   171 

   172     return QPair<int,int>();

   173 }

   174 

   175 

   176 QSet<QString> QGstreamerVideoEncode::supportedStreamTypes(const QString &codecName) const

   177 {

   178     return m_streamTypes.value(codecName);

   179 }