C++ MusicMetadata::setArtist方法代码示例

void Ripper::switchTitlesAndArtists()
{
    if (!m_compilationCheck->GetBooleanCheckState())
        return;

    MusicMetadata *data;

    // Switch title and artist for each track
    QString tmp;
    if (m_tracks->size() > 0)
    {
        for (int track = 0; track < m_tracks->size(); ++track)
        {
            data = m_tracks->at(track)->metadata;

            if (data)
            {
                tmp = data->Artist();
                data->setArtist(data->Title());
                data->setTitle(tmp);
            }
        }

        updateTrackList();
    }
}

void Ripper::artistChanged()
{
    QString newartist = m_artistEdit->GetText();

    if (m_tracks->size() > 0)
    {
        for (int trackno = 0; trackno < m_tracks->size(); ++trackno)
        {
            MusicMetadata *data = m_tracks->at(trackno)->metadata;
            if (data)
            {
                if (m_compilationCheck->GetBooleanCheckState())
                {
                    data->setCompilationArtist(newartist);
                }
                else
                {
                    data->setArtist(newartist);
                    data->setCompilationArtist("");
                }
            }
        }

        updateTrackList();
    }

    m_artistName = newartist;
}

void Ripper::compilationChanged(bool state)
{
    if (!state)
    {
        if (m_tracks->size() > 0)
        {
            // Update artist MetaData of each track on the ablum...
            for (int trackno = 0; trackno < m_tracks->size(); ++trackno)
            {
                MusicMetadata *data = m_tracks->at(trackno)->metadata;
                if (data)
                {
                    data->setCompilationArtist("");
                    data->setArtist(m_artistName);
                    data->setCompilation(false);
                }
            }
        }

        m_switchTitleArtist->SetVisible(false);
    }
    else
    {
        if (m_tracks->size() > 0)
        {
            // Update artist MetaData of each track on the album...
            for (int trackno = 0; trackno < m_tracks->size(); ++trackno)
            {
                MusicMetadata *data;
                data = m_tracks->at(trackno)->metadata;

                if (data)
                {
                    data->setCompilationArtist(m_artistName);
                    data->setCompilation(true);
                }
            }
        }

        m_switchTitleArtist->SetVisible(true);
    }

    BuildFocusList();
    updateTrackList();
}

void DecoderIOFactoryShoutCast::shoutcastMeta(const QString &metadata)
{
    LOG(VB_PLAYBACK, LOG_INFO,
        QString("DecoderIOFactoryShoutCast: metadata changed - %1")
            .arg(metadata));
    ShoutCastMetaParser parser;
    parser.setMetaFormat(getMetadata().MetadataFormat());

    ShoutCastMetaMap meta_map = parser.parseMeta(metadata);

    MusicMetadata mdata = getMetadata();
    mdata.setTitle(meta_map["title"]);
    mdata.setArtist(meta_map["artist"]);
    mdata.setAlbum(meta_map["album"]);
    mdata.setLength(-1);

    DecoderHandlerEvent ev(DecoderHandlerEvent::Meta, mdata);
    dispatch(ev);
}

void avfDecoder::checkMetatdata(void)
{
    uint8_t *pdata = nullptr;

    if (av_opt_get(m_inputContext->getContext(), "icy_metadata_packet", AV_OPT_SEARCH_CHILDREN, &pdata) >= 0)
    {
        QString s = QString::fromUtf8((const char*) pdata);

        if (m_lastMetadata != s)
        {
            m_lastMetadata = s;

            LOG(VB_PLAYBACK, LOG_INFO, QString("avfDecoder: shoutcast metadata changed - %1").arg(m_lastMetadata));

            ShoutCastMetaParser parser;
            parser.setMetaFormat(gPlayer->getDecoderHandler()->getMetadata().MetadataFormat());

            ShoutCastMetaMap meta_map = parser.parseMeta(m_lastMetadata);

            MusicMetadata mdata =  gPlayer->getDecoderHandler()->getMetadata();
            mdata.setTitle(meta_map["title"]);
            mdata.setArtist(meta_map["artist"]);
            mdata.setAlbum(meta_map["album"]);
            mdata.setLength(-1);

            DecoderHandlerEvent ev(DecoderHandlerEvent::Meta, mdata);
            dispatch(ev);
        }

        av_free(pdata);
    }

    if (m_inputContext->getContext()->pb)
    {
        int available = (int) (m_inputContext->getContext()->pb->buf_end - m_inputContext->getContext()->pb->buffer);
        int maxSize = m_inputContext->getContext()->pb->buffer_size;
        DecoderHandlerEvent ev(DecoderHandlerEvent::BufferStatus, available, maxSize);
        dispatch(ev);
    }
}

bool avfDecoder::initialize()
{
    m_inited = m_userStop = m_finish = false;
    m_freq = m_bitrate = 0;
    m_stat = m_channels = 0;
    m_seekTime = -1.0;

    // give up if we dont have an audiooutput set
    if (!output())
    {
        error("avfDecoder: initialise called with a NULL audiooutput");
        return false;
    }

    if (!m_outputBuffer)
    {
        error("avfDecoder: couldn't allocate memory");
        return false;
    }

    output()->PauseUntilBuffered();

    if (m_inputContext)
        delete m_inputContext;

    m_inputContext = new RemoteAVFormatContext(getURL());

    if (!m_inputContext->isOpen())
    {
        error(QString("Could not open url  (%1)").arg(m_url));
        deinit();
        return false;
    }

    // if this is a ice/shoutcast or MMS stream start polling for metadata changes and buffer status
    if (getURL().startsWith("http://") || getURL().startsWith("mmsh://"))
    {
        m_mdataTimer = new QTimer;
        m_mdataTimer->setSingleShot(false);
        connect(m_mdataTimer, SIGNAL(timeout()), this, SLOT(checkMetatdata()));

        m_mdataTimer->start(500);

        // we don't get metadata updates for MMS streams so grab the metadata from the headers
        if (getURL().startsWith("mmsh://"))
        {
            AVDictionaryEntry *tag = nullptr;
            MusicMetadata mdata =  gPlayer->getDecoderHandler()->getMetadata();

            tag = av_dict_get(m_inputContext->getContext()->metadata, "title", tag, AV_DICT_IGNORE_SUFFIX);
            mdata.setTitle(tag->value);

            tag = av_dict_get(m_inputContext->getContext()->metadata, "artist", tag, AV_DICT_IGNORE_SUFFIX);
            mdata.setArtist(tag->value);

            mdata.setAlbum("");
            mdata.setLength(-1);

            DecoderHandlerEvent ev(DecoderHandlerEvent::Meta, mdata);
            dispatch(ev);
        }
    }

    // determine the stream format
    // this also populates information needed for metadata
    if (avformat_find_stream_info(m_inputContext->getContext(), nullptr) < 0)
    {
        error("Could not determine the stream format.");
        deinit();
        return false;
    }

    // let FFmpeg finds the best audio stream (should only be one), also catter
    // should the file/stream not be an audio one
    AVCodec *codec;
    int selTrack = av_find_best_stream(m_inputContext->getContext(), AVMEDIA_TYPE_AUDIO,
                                       -1, -1, &codec, 0);

    if (selTrack < 0)
    {
        error(QString("Could not find audio stream."));
        deinit();
        return false;
    }

    // Store the audio codec of the stream
    m_audioDec = gCodecMap->getCodecContext
        (m_inputContext->getContext()->streams[selTrack]);

    // Store the input format of the context
    m_inputFormat = m_inputContext->getContext()->iformat;

    if (avcodec_open2(m_audioDec, codec, nullptr) < 0)
    {
        error(QString("Could not open audio codec: %1")
            .arg(m_audioDec->codec_id));
        deinit();
        return false;
    }

//.........这里部分代码省略.........

static int UpdateMeta(const MythUtilCommandLineParser &cmdline)
{
    bool ok = true;
    int result = GENERIC_EXIT_OK;

    if (cmdline.toString("songid").isEmpty())
    {
        LOG(VB_GENERAL, LOG_ERR, "Missing --songid option");
        return GENERIC_EXIT_INVALID_CMDLINE;
    }
    int songID = cmdline.toInt("songid");

    MusicMetadata *mdata = MusicMetadata::createFromID(songID);
    if (!mdata)
    {
        LOG(VB_GENERAL, LOG_ERR, QString("Cannot find metadata for trackid: %1").arg(songID));
        return GENERIC_EXIT_NOT_OK;
    }

    if (!cmdline.toString("title").isEmpty())
        mdata->setTitle(cmdline.toString("title"));

    if (!cmdline.toString("artist").isEmpty())
        mdata->setArtist(cmdline.toString("artist"));

    if (!cmdline.toString("album").isEmpty())
        mdata->setAlbum(cmdline.toString("album"));

    if (!cmdline.toString("genre").isEmpty())
        mdata->setGenre(cmdline.toString("genre"));

    if (!cmdline.toString("trackno").isEmpty())
        mdata->setTrack(cmdline.toInt("trackno"));

    if (!cmdline.toString("year").isEmpty())
        mdata->setYear(cmdline.toInt("year"));

    if (!cmdline.toString("rating").isEmpty())
        mdata->setRating(cmdline.toInt("rating"));

    if (!cmdline.toString("playcount").isEmpty())
        mdata->setPlaycount(cmdline.toInt("playcount"));

    if (!cmdline.toString("lastplayed").isEmpty())
        mdata->setLastPlay(cmdline.toDateTime("lastplayed"));

    mdata->dumpToDatabase();

    MetaIO *tagger = mdata->getTagger();
    if (tagger)
    {
        ok = tagger->write(mdata->getLocalFilename(), mdata);

        if (!ok)
            LOG(VB_GENERAL, LOG_ERR, QString("Failed to write to tag for trackid: %1").arg(songID));
    }

    // tell any clients that the metadata for this track has changed
    gCoreContext->SendMessage(QString("MUSIC_METADATA_CHANGED %1").arg(songID));

    if (!ok)
        result = GENERIC_EXIT_NOT_OK;

    return result;
}