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

    41 

    42 #include "audioencodercontrol.h"

    43 #include "audiocapturesession.h"

    44 

    45 #include <QtMultimedia/qaudioformat.h>

    46 

    47 #include <QtCore/qdebug.h>

    48 

    49 AudioEncoderControl::AudioEncoderControl(QObject *parent)

    50     :QAudioEncoderControl(parent)

    51 {

    52     m_session = qobject_cast<AudioCaptureSession*>(parent);

    53 

    54     QT_PREPEND_NAMESPACE(QAudioFormat) fmt;

    55     fmt.setSampleSize(8);

    56     fmt.setChannels(1);

    57     fmt.setFrequency(8000);

    58     fmt.setSampleType(QT_PREPEND_NAMESPACE(QAudioFormat)::SignedInt);

    59     fmt.setCodec("audio/pcm");

    60     fmt.setByteOrder(QAudioFormat::LittleEndian);

    61     m_session->setFormat(fmt);

    62 

    63     m_settings.setEncodingMode(QtMedia::ConstantQualityEncoding);

    64     m_settings.setCodec("audio/pcm");

    65     m_settings.setBitRate(8000);

    66     m_settings.setChannelCount(1);

    67     m_settings.setSampleRate(8000);

    68     m_settings.setQuality(QtMedia::LowQuality);

    69 }

    70 

    71 AudioEncoderControl::~AudioEncoderControl()

    72 {

    73 }

    74 

    75 QStringList AudioEncoderControl::supportedAudioCodecs() const

    76 {

    77     QStringList list;

    78     if (m_session->supportedContainers().size() > 0)

    79         list.append("audio/pcm");

    80 

    81     return list;

    82 }

    83 

    84 QString AudioEncoderControl::codecDescription(const QString &codecName) const

    85 {

    86     if (codecName.contains(QLatin1String("audio/pcm")))

    87         return QString(tr("PCM audio data"));

    88 

    89     return QString();

    90 }

    91 

    92 QStringList AudioEncoderControl::supportedEncodingOptions(const QString &codec) const

    93 {

    94     Q_UNUSED(codec)

    95 

    96     QStringList list;

    97     return list;

    98 }

    99 

   100 QVariant AudioEncoderControl::encodingOption(const QString &codec, const QString &name) const

   101 {

   102     Q_UNUSED(codec)

   103     Q_UNUSED(name)

   104 

   105     return QVariant();

   106 }

   107 

   108 void AudioEncoderControl::setEncodingOption(

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

   110 {

   111     Q_UNUSED(value)

   112     Q_UNUSED(codec)

   113     Q_UNUSED(name)

   114 }

   115 

   116 QList<int> AudioEncoderControl::supportedSampleRates(const QAudioEncoderSettings &, bool *continuous) const

   117 {

   118     if (continuous)

   119         *continuous = false;

   120 

   121     return m_session->deviceInfo()->supportedFrequencies();

   122 }

   123 

   124 QAudioEncoderSettings AudioEncoderControl::audioSettings() const

   125 {

   126     return m_settings;

   127 }

   128 

   129 void AudioEncoderControl::setAudioSettings(const QAudioEncoderSettings &settings)

   130 {

   131     QAudioFormat fmt = m_session->format();

   132 

   133     if (settings.encodingMode() == QtMedia::ConstantQualityEncoding) {

   134         if (settings.quality() == QtMedia::LowQuality) {

   135             fmt.setSampleSize(8);

   136             fmt.setChannels(1);

   137             fmt.setFrequency(8000);

   138             fmt.setSampleType(QAudioFormat::UnSignedInt);

   139 

   140         } else if (settings.quality() == QtMedia::NormalQuality) {

   141             fmt.setSampleSize(16);

   142             fmt.setChannels(1);

   143             fmt.setFrequency(22050);

   144             fmt.setSampleType(QAudioFormat::SignedInt);

   145 

   146         } else {

   147             fmt.setSampleSize(16);

   148             fmt.setChannels(1);

   149             fmt.setFrequency(44100);

   150             fmt.setSampleType(QAudioFormat::SignedInt);

   151         }

   152 

   153     } else {

   154         fmt.setChannels(settings.channelCount());

   155         fmt.setFrequency(settings.sampleRate());

   156         if (settings.sampleRate() == 8000 && settings.bitRate() == 8000) {

   157             fmt.setSampleType(QAudioFormat::UnSignedInt);

   158             fmt.setSampleSize(8);

   159         } else {

   160             fmt.setSampleSize(16);

   161             fmt.setSampleType(QAudioFormat::SignedInt);

   162         }

   163     }

   164     fmt.setCodec("audio/pcm");

   165 

   166     m_session->setFormat(fmt);

   167     m_settings = settings;

   168 }