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最近项目需要, 要获取音乐文件tag信息. 有两个方式, 本人偏向第二种方式. 效率比较高,可控性比较好.

一.QML方式

使用QML Audio component 进行解析. 将多媒体文件都放到Playlist中, 在遍历每一个文件取出文件中的tag.

import QtQuick 2.7import QtQuick.Controls 2.4import QtMultimedia 5.8Item {    property alias playList: parseMultimedia.playlist    property alias musicPlayer: musicPlayer    WorkerScript {        id: worker        property bool running: false        property var type        source: "dataloader.js"        onMessage: {            if (messageObject.action === 'sortArtist') {                var msg = {
  'action': 'sortAlbum', 'model': songsListModel,                    'dest': albumListModel};                worker.sendMessage(msg);            }        }    }    Audio {        id: musicPlayer        autoPlay: true        autoLoad: true        onSourceChanged: {        }        playlist: Playlist {            id: musicPlayList        }    }    Audio {        id: parseMultimedia        property var fileName        //autoPlay :true        autoLoad: true        muted: true        loops: Audio.Infinite        playlist: parsePlaylist    }    Playlist {        id: parsePlaylist    }    Timer {        id: insertTimer        property int indexPath: 0        interval: 200;        running: false; repeat: true        onTriggered: {            if ( indexPath < musicManager.count()) {                parseMultimedia.play()                parseMultimedia.pause()                var title = parseMultimedia.metaData.title                var artist = parseMultimedia.metaData.albumArtist                if (artist === undefined) {                    artist = 'unknown'                }                var album = parseMultimedia.metaData.albumTitle                if (album === undefined) {                    album = 'unknown'                }                var source = Qt.resolvedUrl(parseMultimedia.playlist.itemSource(indexPath))                var fileName = musicManager.getFileInfoName(indexPath)                if (title === undefined) {                    title =  fileName                }                songsListModel.set(parsePlaylist.currentIndex, {
  "playlistIndex": parsePlaylist.currentIndex,                                       "title": parseMultimedia.metaData.title,                                       "album": album,                                       "artist": artist,                                       "source": source,                                       "fileName": fileName });                indexPath = indexPath + 1                parsePlaylist.next()               // listView.forceLayout();            } else {                if (indexPath >= musicManager.count() ) {                    insertTimer.stop()                    insertTimer.indexPath = 0                    appWindow.isReady = true                    allSongListModelReady();                  }            }        }        onRunningChanged: {            if (!running) {                var msg = {
  'action': 'sortArtist', 'model': songsListModel,                    'dest':artistListModel};                worker.sendMessage(msg);            }        }    }    Timer {        id: loadModelTimer        property int indexPath: 0        running: false; repeat: false        onTriggered: {            parsePlaylist.currentIndex = 0            insertTimer.start()        }    }    Connections {        target: musicManager        onLoadfinish: {            parsePlaylist.clear()            loadModelTimer.interval = musicManager.count()            loadModelTimer.start()            for (var i = 0; i< musicManager.count(); i++) {                parsePlaylist.addItem("file://" + musicManager.getFileInfoPath(i))            }            loadFolderData();        }    }    function loadFolderData() {       for (var i = 0; i < musicManager.folderCount(); i++) {           var item = musicManager.folderItem(i);           folderListModel.set(i, {
  "baseName": item.baseName,                                           "uid": item.uId ,                                           "dropTarget": "none",                                           "isFolder": item.isFolder,                                           "parentFolder": item.parentFolder,                                           "folderOpen":item.folderOpen,                                           "source": item.path,                                           "fileCount": item.fileCount })       }    }    Component.onCompleted: {        musicManager.runParse();    }}

二.C++ tablib 方式

这个没什么好说的, 直接将tablib编译成和一平台一样的类型就可以了.例如: arm. x86.

int main(int argc, char **argv)  {      QString sname;      QString singer;      QString album;      QFileInfo fileInfo(QString("/sdcard/Music/Alone.mp3"));      qDebug() << fileInfo.absoluteFilePath();    const char *fileName = "/sdcard/Music/Alone.mp3";      TagLib::MPEG::File *mpegFile = new TagLib::MPEG::File(fileName);      qDebug() << "mpegFile: " << mpegFile;      if(false == mpegFile->isOpen()) {      qDebug() << "-----open failed---";  }  else  {      sname = QString(mpegFile->tag()->title().toCString(true));      singer = QString(mpegFile->tag()->artist().toCString(true));      album = QString(mpegFile->tag()->album().toCString(true));    qDebug() << sname;      qDebug() << singer;      qDebug() << album;      }}

这里有我自己编译QT 项目.

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