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    40 ****************************************************************************/

    41 

    42 #include "qgstreameraudioencode_maemo.h"

    43 #include "qgstreamermediacontainercontrol_maemo.h"

    44 

    45 #include <QtCore/qdebug.h>

    46 

    47 QGstreamerAudioEncode::QGstreamerAudioEncode(QObject *parent)

    48     :QAudioEncoderControl(parent)

    49 {

    50     QList<QByteArray> codecCandidates;

    51     codecCandidates << "audio/mpeg" << "audio/PCM" << "audio/AMR" << "audio/AMR-WB" << "audio/speex";

    52 

    53     m_elementNames["audio/mpeg"] = "nokiaaacenc";

    54     m_elementNames["audio/speex"] = "speexenc";

    55     m_elementNames["audio/PCM"] = "audioresample";

    56     m_elementNames["audio/AMR"] = "nokiaamrnbenc";

    57     m_elementNames["audio/AMR-WB"] = "nokiaamrwbenc";

    58 

    59     foreach( const QByteArray& codecName, codecCandidates ) {

    60         QByteArray elementName = m_elementNames[codecName];

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

    62 

    63         if (factory) {

    64             m_codecs.append(codecName);

    65             const gchar *descr = gst_element_factory_get_description(factory);

    66 

    67             if (codecName == QByteArray("audio/PCM"))

    68                 m_codecDescriptions.insert(codecName, tr("Raw PCM audio"));

    69             else

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

    71 

    72             m_streamTypes.insert(codecName,

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

    74 

    75             gst_object_unref(GST_OBJECT(factory));

    76         }

    77     }

    78 

    79     if (!m_codecs.isEmpty())

    80         m_audioSettings.setCodec(m_codecs[0]);

    81 }

    82 

    83 QGstreamerAudioEncode::~QGstreamerAudioEncode()

    84 {

    85 }

    86 

    87 QStringList QGstreamerAudioEncode::supportedAudioCodecs() const

    88 {

    89     return m_codecs;

    90 }

    91 

    92 QString QGstreamerAudioEncode::codecDescription(const QString &codecName) const

    93 {

    94     return m_codecDescriptions.value(codecName);

    95 }

    96 

    97 QStringList QGstreamerAudioEncode::supportedEncodingOptions(const QString &codec) const

    98 {

    99     return m_codecOptions.value(codec);

   100 }

   101 

   102 QVariant QGstreamerAudioEncode::encodingOption(

   103         const QString &codec, const QString &name) const

   104 {

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

   106 }

   107 

   108 void QGstreamerAudioEncode::setEncodingOption(

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

   110 {

   111     m_options[codec][name] = value;

   112 }

   113 

   114 QList<int> QGstreamerAudioEncode::supportedSampleRates(const QAudioEncoderSettings &, bool *) const

   115 {

   116     //TODO check element caps to find actual values

   117 

   118     return QList<int>();

   119 }

   120 

   121 QAudioEncoderSettings QGstreamerAudioEncode::audioSettings() const

   122 {

   123     return m_audioSettings;

   124 }

   125 

   126 void QGstreamerAudioEncode::setAudioSettings(const QAudioEncoderSettings &settings)

   127 {

   128     m_audioSettings = settings;

   129 }

   130 

   131 GstElement *QGstreamerAudioEncode::createEncoder()

   132 {

   133     QString codec = m_audioSettings.codec();

   134 

   135     GstBin * encoderBin = GST_BIN(gst_bin_new("audio-encoder-bin"));

   136     Q_ASSERT(encoderBin);

   137 

   138     GstElement *capsFilter = gst_element_factory_make("capsfilter", NULL);

   139     GstElement *encoderElement = gst_element_factory_make(m_elementNames.value(codec).constData(), NULL);

   140 

   141     Q_ASSERT(encoderElement);

   142 

   143     gst_bin_add(encoderBin, capsFilter);

   144     gst_bin_add(encoderBin, encoderElement);

   145     gst_element_link(capsFilter, encoderElement);

   146 

   147     // add ghostpads

   148     GstPad *pad = gst_element_get_static_pad(capsFilter, "sink");

   149     gst_element_add_pad(GST_ELEMENT(encoderBin), gst_ghost_pad_new("sink", pad));

   150     gst_object_unref(GST_OBJECT(pad));

   151 

   152     pad = gst_element_get_static_pad(encoderElement, "src");

   153     gst_element_add_pad(GST_ELEMENT(encoderBin), gst_ghost_pad_new("src", pad));

   154     gst_object_unref(GST_OBJECT(pad));

   155 

   156     if (m_audioSettings.sampleRate() > 0 || m_audioSettings.channelCount() > 0) {

   157         GstCaps *caps = gst_caps_new_empty();

   158         GstStructure *structure = gst_structure_new("audio/x-raw-int", NULL);

   159 

   160         if (m_audioSettings.sampleRate() > 0)

   161             gst_structure_set(structure, "rate", G_TYPE_INT, m_audioSettings.sampleRate(), NULL );

   162 

   163         if (m_audioSettings.channelCount() > 0)

   164             gst_structure_set(structure, "channels", G_TYPE_INT, m_audioSettings.channelCount(), NULL );

   165 

   166         gst_caps_append_structure(caps,structure);

   167 

   168         g_object_set(G_OBJECT(capsFilter), "caps", caps, NULL);

   169     }

   170 

   171     if (encoderElement) {

   172         if (m_audioSettings.encodingMode() == QtMedia::ConstantQualityEncoding) {

   173             QtMedia::EncodingQuality qualityValue = m_audioSettings.quality();

   174 

   175             if (codec == QLatin1String("audio/mpeg")) {

   176                 g_object_set(G_OBJECT(encoderElement), "target", 0, NULL); //constant quality mode

   177                 qreal quality[] = {

   178                     8000, //VeryLow

   179                     64000, //Low

   180                     128000, //Normal

   181                     192000, //High

   182                     320000 //VeryHigh

   183                 };

   184                 g_object_set(G_OBJECT(encoderElement), "bitrate", quality[qualityValue], NULL);

   185             } else if (codec == QLatin1String("audio/speex")) {

   186                 //0-10 range with default 8

   187                 double qualityTable[] = {

   188                     2, //VeryLow

   189                     5, //Low

   190                     8, //Normal

   191                     9, //High

   192                     10 //VeryHigh

   193                 };

   194                 g_object_set(G_OBJECT(encoderElement), "quality", qualityTable[qualityValue], NULL);

   195             } else if (codec.startsWith("audio/AMR")) {

   196                 int band[] = {

   197                     0, //VeryLow

   198                     2, //Low

   199                     4, //Normal

   200                     6, //High

   201                     7  //VeryHigh

   202                 };

   203 

   204                 g_object_set(G_OBJECT(encoderElement), "band-mode", band[qualityValue], NULL);

   205             }

   206         } else {

   207             int bitrate = m_audioSettings.bitRate();

   208             if (bitrate > 0) {

   209                 g_object_set(G_OBJECT(encoderElement), "bitrate", bitrate, NULL);

   210             }

   211         }

   212 

   213         QMap<QString, QVariant> options = m_options.value(codec);

   214         QMapIterator<QString,QVariant> it(options);

   215         while (it.hasNext()) {

   216             it.next();

   217             QString option = it.key();

   218             QVariant value = it.value();

   219 

   220             switch (value.type()) {

   221             case QVariant::Int:

   222                 g_object_set(G_OBJECT(encoderElement), option.toAscii(), value.toInt(), NULL);

   223                 break;

   224             case QVariant::Bool:

   225                 g_object_set(G_OBJECT(encoderElement), option.toAscii(), value.toBool(), NULL);

   226                 break;

   227             case QVariant::Double:

   228                 g_object_set(G_OBJECT(encoderElement), option.toAscii(), value.toDouble(), NULL);

   229                 break;

   230             case QVariant::String:

   231                 g_object_set(G_OBJECT(encoderElement), option.toAscii(), value.toString().toUtf8().constData(), NULL);

   232                 break;

   233             default:

   234                 qWarning() << "unsupported option type:" << option << value;

   235                 break;

   236             }

   237 

   238         }

   239     }

   240 

   241     return GST_ELEMENT(encoderBin);

   242 

   243 }

   244 

   245 

   246 QSet<QString> QGstreamerAudioEncode::supportedStreamTypes(const QString &codecName) const

   247 {

   248     return m_streamTypes.value(codecName);

   249 }