fixed build with -Werror=zero-as-null-pointer-constant

git-svn-id: http://svn.code.sf.net/p/qmmp-dev/code/trunk/qmmp@8572 90c681e8-e032-0410-971d-27865f9a5e38

54 files changed, 204 insertions, 204 deletions

diff --git a/src/plugins/Input/aac/decoder_aac.cpp b/src/plugins/Input/aac/decoder_aac.cpp
index bd6708b6e..6a4c3740c 100644
--- a/src/plugins/Input/aac/decoder_aac.cpp
+++ b/src/plugins/Input/aac/decoder_aac.cpp
@@ -36,10 +36,10 @@ DecoderAAC::DecoderAAC(QIODevice *i)
 {
     m_bitrate = 0;
     m_totalTime = 0;
-    m_data = 0;
-    m_input_buf = 0;
+    m_data = nullptr;
+    m_input_buf = nullptr;
     m_input_at = 0;
-    m_sample_buf = 0;
+    m_sample_buf = nullptr;
     m_sample_buf_at = 0;
     m_sample_buf_size = 0;
 }
@@ -52,11 +52,11 @@ DecoderAAC::~DecoderAAC()
         if (data()->handle)
             NeAACDecClose (data()->handle);
         delete data();
-        m_data = 0;
+        m_data = nullptr;
     }
     if (m_input_buf)
         delete [] m_input_buf;
-    m_input_buf = 0;
+    m_input_buf = nullptr;
     m_bitrate = 0;
 }
 
diff --git a/src/plugins/Input/aac/decoderaacfactory.cpp b/src/plugins/Input/aac/decoderaacfactory.cpp
index eca457612..6ceca28ee 100644
--- a/src/plugins/Input/aac/decoderaacfactory.cpp
+++ b/src/plugins/Input/aac/decoderaacfactory.cpp
@@ -92,7 +92,7 @@ MetaDataModel* DecoderAACFactory::createMetaDataModel(const QString &path, bool
 {
     Q_UNUSED(path);
     Q_UNUSED(readOnly);
-    return 0;
+    return nullptr;
 }
 
 void DecoderAACFactory::showSettings(QWidget *)
diff --git a/src/plugins/Input/archive/archiveinputdevice.cpp b/src/plugins/Input/archive/archiveinputdevice.cpp
index 6056dca98..8d10647ab 100644
--- a/src/plugins/Input/archive/archiveinputdevice.cpp
+++ b/src/plugins/Input/archive/archiveinputdevice.cpp
@@ -23,8 +23,8 @@
 
 ArchiveInputDevice::ArchiveInputDevice(const QString &url, QObject *parent)  : QIODevice(parent)
 {
-    m_archive = 0;
-    m_entry = 0;
+    m_archive = nullptr;
+    m_entry = nullptr;
     QString filePath = url.section("#", -1);
     QString archivePath = url;
     archivePath.remove(QRegExp("^.+://"));
@@ -74,7 +74,7 @@ ArchiveInputDevice::~ArchiveInputDevice()
     {
         archive_read_close(m_archive);
         archive_read_free(m_archive);
-        m_archive = 0;
+        m_archive = nullptr;
     }
 }
 
diff --git a/src/plugins/Input/archive/archiveinputdevice.h b/src/plugins/Input/archive/archiveinputdevice.h
index eab4747eb..e6c31fdda 100644
--- a/src/plugins/Input/archive/archiveinputdevice.h
+++ b/src/plugins/Input/archive/archiveinputdevice.h
@@ -30,8 +30,8 @@ class ArchiveInputDevice : public QIODevice
 {
     Q_OBJECT
 public:
-    ArchiveInputDevice(const QString &url, QObject *parent = 0);
-    ArchiveInputDevice(struct archive *a, struct archive_entry *e, QObject *parent = 0);
+    ArchiveInputDevice(const QString &url, QObject *parent = nullptr);
+    ArchiveInputDevice(struct archive *a, struct archive_entry *e, QObject *parent = nullptr);
     virtual ~ArchiveInputDevice();
 
     bool seek(qint64 pos);
diff --git a/src/plugins/Input/archive/decoder_archive.cpp b/src/plugins/Input/archive/decoder_archive.cpp
index d4cd7933d..fa5bcf292 100644
--- a/src/plugins/Input/archive/decoder_archive.cpp
+++ b/src/plugins/Input/archive/decoder_archive.cpp
@@ -27,8 +27,8 @@
 DecoderArchive::DecoderArchive(const QString &url)
 {
     m_url = url;
-    m_decoder = 0;
-    m_input = 0;
+    m_decoder = nullptr;
+    m_input = nullptr;
 }
 
 DecoderArchive::~DecoderArchive()
@@ -36,12 +36,12 @@ DecoderArchive::~DecoderArchive()
     if(m_decoder)
     {
         delete m_decoder;
-        m_decoder = 0;
+        m_decoder = nullptr;
     }
     if(m_input)
     {
         delete m_input;
-        m_input = 0;
+        m_input = nullptr;
     }
 }
 
@@ -80,7 +80,7 @@ bool DecoderArchive::initialize()
         return false;
     }
 
-    DecoderFactory *factory = 0;
+    DecoderFactory *factory = nullptr;
     if(filtered.size() == 1)
         factory = filtered.first();
     else
diff --git a/src/plugins/Input/archive/decoderarchivefactory.cpp b/src/plugins/Input/archive/decoderarchivefactory.cpp
index 50a994229..2b0f6ce25 100644
--- a/src/plugins/Input/archive/decoderarchivefactory.cpp
+++ b/src/plugins/Input/archive/decoderarchivefactory.cpp
@@ -56,7 +56,7 @@ Decoder *DecoderArchiveFactory::create(const QString &url, QIODevice *)
 QList<TrackInfo *> DecoderArchiveFactory::createPlayList(const QString &path, TrackInfo::Parts parts, QStringList *)
 {
     QList<TrackInfo *> list;
-    struct archive_entry *entry = 0;
+    struct archive_entry *entry = nullptr;
 
     struct archive *a = archive_read_new();
     archive_read_support_filter_all(a);
@@ -109,7 +109,7 @@ QList<TrackInfo *> DecoderArchiveFactory::createPlayList(const QString &path, Tr
                                      .arg(archivePath)
                                      .arg(filePath));
 
-                ArchiveInputDevice dev(a, entry, 0);
+                ArchiveInputDevice dev(a, entry, nullptr);
                 ArchiveTagReader reader(&dev, list.last()->path());
 
                 if(parts & TrackInfo::MetaData)
@@ -140,7 +140,7 @@ MetaDataModel* DecoderArchiveFactory::createMetaDataModel(const QString &path, b
 {
     Q_UNUSED(path);
     Q_UNUSED(readOnly);
-    return 0;
+    return nullptr;
 }
 
 void DecoderArchiveFactory::showSettings(QWidget *)
diff --git a/src/plugins/Input/cdaudio/decoder_cdaudio.cpp b/src/plugins/Input/cdaudio/decoder_cdaudio.cpp
index 1eda15805..11e8119ab 100644
--- a/src/plugins/Input/cdaudio/decoder_cdaudio.cpp
+++ b/src/plugins/Input/cdaudio/decoder_cdaudio.cpp
@@ -87,7 +87,7 @@ DecoderCDAudio::DecoderCDAudio(const QString &url) : Decoder()
     m_last_sector  = -1;
     m_current_sector  = -1;
     m_url = url;
-    m_cdio = 0;
+    m_cdio = nullptr;
     m_buffer_at = 0;
     m_buffer = new char[CDDA_BUFFER_SIZE];
 }
@@ -98,7 +98,7 @@ DecoderCDAudio::~DecoderCDAudio()
     if (m_cdio)
     {
         cdio_destroy(m_cdio);
-        m_cdio = 0;
+        m_cdio = nullptr;
     }
     delete [] m_buffer;
 }
@@ -111,13 +111,13 @@ QList<CDATrack> DecoderCDAudio::generateTrackList(const QString &device, TrackIn
     bool use_cd_text = settings.value("cdaudio/cdtext", true).toBool();
     QList <CDATrack> tracks;
     cdio_log_set_handler(log_handler); //setup cdio log handler
-    CdIo_t *cdio = 0;
+    CdIo_t *cdio = nullptr;
     QString device_path = device;
     if (device_path.isEmpty() || device_path == "/")
         device_path = settings.value("cdaudio/device").toString();
     if (device_path.isEmpty() || device_path == "/")
     {
-        char **cd_drives = cdio_get_devices_with_cap(0, CDIO_FS_AUDIO, true); //get drive list with CDA disks
+        char **cd_drives = cdio_get_devices_with_cap(nullptr, CDIO_FS_AUDIO, true); //get drive list with CDA disks
         // open first audio capable cd drive
         if (cd_drives && *cd_drives)
         {
@@ -164,7 +164,7 @@ QList<CDATrack> DecoderCDAudio::generateTrackList(const QString &device, TrackIn
             qWarning("DecoderCDAudio: unable to set drive speed to %dX.", cd_speed);
     }
 
-    cdrom_drive_t *pcdrom_drive = cdio_cddap_identify_cdio(cdio, 1, 0); //create paranoya CD-ROM object
+    cdrom_drive_t *pcdrom_drive = cdio_cddap_identify_cdio(cdio, 1, nullptr); //create paranoya CD-ROM object
     //get first and last track numbers
     int first_track_number = cdio_get_first_track_num(pcdrom_drive->p_cdio);
     int last_track_number = cdio_get_last_track_num(pcdrom_drive->p_cdio);
@@ -173,7 +173,7 @@ QList<CDATrack> DecoderCDAudio::generateTrackList(const QString &device, TrackIn
     {
         qWarning("DecoderCDAudio: invalid first (last) track number.");
         cdio_destroy(cdio);
-        cdio = 0;
+        cdio = nullptr;
         return tracks;
     }
     bool use_cddb = true;
@@ -201,12 +201,12 @@ QList<CDATrack> DecoderCDAudio::generateTrackList(const QString &device, TrackIn
             qWarning("DecoderCDAudio: invalid stard(end) lsn for the track %d.", i);
             tracks.clear();
             cdio_destroy(cdio);
-            cdio = 0;
+            cdio = nullptr;
             return tracks;
         }
         //cd text
 #if LIBCDIO_VERSION_NUM <= 83
-        cdtext_t *cdtext = use_cd_text ? cdio_get_cdtext(pcdrom_drive->p_cdio, i) : 0;
+        cdtext_t *cdtext = use_cd_text ? cdio_get_cdtext(pcdrom_drive->p_cdio, i) : nullptr;
         if (cdtext && cdtext->field[CDTEXT_TITLE])
         {
             t.info.setValue(Qmmp::TITLE, QString::fromLocal8Bit(cdtext->field[CDTEXT_TITLE]));
@@ -215,7 +215,7 @@ QList<CDATrack> DecoderCDAudio::generateTrackList(const QString &device, TrackIn
             use_cddb = false;
         }
 #else
-        cdtext_t *cdtext = use_cd_text ? cdio_get_cdtext(pcdrom_drive->p_cdio) : 0;
+        cdtext_t *cdtext = use_cd_text ? cdio_get_cdtext(pcdrom_drive->p_cdio) : nullptr;
         if (cdtext)
         {
             t.info.setValue(Qmmp::TITLE, QString::fromUtf8(cdtext_get_const(cdtext,CDTEXT_FIELD_TITLE,i)));
@@ -329,7 +329,7 @@ QList<CDATrack> DecoderCDAudio::generateTrackList(const QString &device, TrackIn
     }
 
     cdio_destroy(cdio);
-    cdio = 0;
+    cdio = nullptr;
     m_track_cache = tracks;
     return tracks;
 }
@@ -425,7 +425,7 @@ bool DecoderCDAudio::initialize()
 
     if (device_path.isEmpty() || device_path == "/")
     {
-        char **cd_drives = cdio_get_devices_with_cap(0, CDIO_FS_AUDIO, true); //get drive list with CDA disks
+        char **cd_drives = cdio_get_devices_with_cap(nullptr, CDIO_FS_AUDIO, true); //get drive list with CDA disks
         // open first audio capable cd drive
         if (cd_drives && *cd_drives)
         {
diff --git a/src/plugins/Input/cdaudio/decodercdaudiofactory.cpp b/src/plugins/Input/cdaudio/decodercdaudiofactory.cpp
index 9fca3c1fe..f79ba96be 100644
--- a/src/plugins/Input/cdaudio/decodercdaudiofactory.cpp
+++ b/src/plugins/Input/cdaudio/decodercdaudiofactory.cpp
@@ -72,7 +72,7 @@ MetaDataModel* DecoderCDAudioFactory::createMetaDataModel(const QString &path, b
 {
     Q_UNUSED(readOnly);
     Q_UNUSED(path);
-    return 0;
+    return nullptr;
 }
 
 void DecoderCDAudioFactory::showSettings(QWidget *parent)
diff --git a/src/plugins/Input/cdaudio/settingsdialog.h b/src/plugins/Input/cdaudio/settingsdialog.h
index 7eb53d5a9..ff784a6db 100644
--- a/src/plugins/Input/cdaudio/settingsdialog.h
+++ b/src/plugins/Input/cdaudio/settingsdialog.h
@@ -30,7 +30,7 @@ class SettingsDialog : public QDialog
 {
 Q_OBJECT
 public:
-    SettingsDialog(QWidget *parent = 0);
+    SettingsDialog(QWidget *parent = nullptr);
 
     ~SettingsDialog();
 
diff --git a/src/plugins/Input/cue/cueparser.cpp b/src/plugins/Input/cue/cueparser.cpp
index 350d6f76e..b50eda92d 100644
--- a/src/plugins/Input/cue/cueparser.cpp
+++ b/src/plugins/Input/cue/cueparser.cpp
@@ -49,9 +49,9 @@ CUEParser::CUEParser(const QString &path)
     QSettings settings(Qmmp::configFile(), QSettings::IniFormat);
     settings.beginGroup("CUE");
     m_dirty = settings.value("dirty_cue", false).toBool();
-    QTextCodec *codec = 0;
+    QTextCodec *codec = nullptr;
 #ifdef WITH_ENCA
-    EncaAnalyser analyser = 0;
+    EncaAnalyser analyser = nullptr;
     if(settings.value("use_enca", false).toBool())
     {
         analyser = enca_analyser_alloc(settings.value("enca_lang").toByteArray ().constData());
diff --git a/src/plugins/Input/cue/decoder_cue.cpp b/src/plugins/Input/cue/decoder_cue.cpp
index e21dfdca5..ae7f06edc 100644
--- a/src/plugins/Input/cue/decoder_cue.cpp
+++ b/src/plugins/Input/cue/decoder_cue.cpp
@@ -33,27 +33,27 @@ DecoderCUE::DecoderCUE(const QString &url)
         : Decoder()
 {
     m_path = url;
-    m_decoder = 0;
-    m_parser = 0;
+    m_decoder = nullptr;
+    m_parser = nullptr;
     m_track = 0;
-    m_buf = 0;
-    m_input = 0;
+    m_buf = nullptr;
+    m_input = nullptr;
 }
 
 DecoderCUE::~DecoderCUE()
 {
     if(m_decoder)
         delete m_decoder;
-    m_decoder = 0;
+    m_decoder = nullptr;
     if(m_parser)
         delete m_parser;
-    m_parser = 0;
+    m_parser = nullptr;
     if(m_buf)
         delete [] m_buf;
-    m_buf = 0;
+    m_buf = nullptr;
     if(m_input)
         m_input->deleteLater();
-    m_input = 0;
+    m_input = nullptr;
 }
 
 bool DecoderCUE::initialize()
@@ -134,7 +134,7 @@ qint64 DecoderCUE::read(unsigned char *data, qint64 size)
         if(size >= m_buf_size)
         {
             delete[] m_buf;
-            m_buf = 0;
+            m_buf = nullptr;
             m_buf_size = 0;
         }
         else
diff --git a/src/plugins/Input/cue/decodercuefactory.cpp b/src/plugins/Input/cue/decodercuefactory.cpp
index 103f4b597..35d66e1dd 100644
--- a/src/plugins/Input/cue/decodercuefactory.cpp
+++ b/src/plugins/Input/cue/decodercuefactory.cpp
@@ -77,7 +77,7 @@ QList<TrackInfo *> DecoderCUEFactory::createPlayList(const QString &path, TrackI
 MetaDataModel* DecoderCUEFactory::createMetaDataModel(const QString &path, bool readOnly)
 {
     Q_UNUSED(readOnly);
-    return path.startsWith("cue://") ? new CUEMetaDataModel(path) : 0;
+    return path.startsWith("cue://") ? new CUEMetaDataModel(path) : nullptr;
 }
 
 void DecoderCUEFactory::showSettings(QWidget *parent)
diff --git a/src/plugins/Input/cue/settingsdialog.h b/src/plugins/Input/cue/settingsdialog.h
index 60bdc6c07..158be59dd 100644
--- a/src/plugins/Input/cue/settingsdialog.h
+++ b/src/plugins/Input/cue/settingsdialog.h
@@ -30,7 +30,7 @@ class SettingsDialog : public QDialog
 {
 Q_OBJECT
 public:
-    SettingsDialog(QWidget *parent = 0);
+    SettingsDialog(QWidget *parent = nullptr);
 
     ~SettingsDialog();
 
diff --git a/src/plugins/Input/ffmpeg/decoder_ffmpeg.cpp b/src/plugins/Input/ffmpeg/decoder_ffmpeg.cpp
index 99ff7c402..9548970fa 100644
--- a/src/plugins/Input/ffmpeg/decoder_ffmpeg.cpp
+++ b/src/plugins/Input/ffmpeg/decoder_ffmpeg.cpp
@@ -71,17 +71,17 @@ DecoderFFmpeg::DecoderFFmpeg(const QString &path, QIODevice *i)
 {
     m_bitrate = 0;
     m_totalTime = 0;
-    ic = 0;
+    ic = nullptr;
     m_path = path;
     m_temp_pkt.size = 0;
     m_pkt.size = 0;
-    m_pkt.data = 0;
+    m_pkt.data = nullptr;
     m_output_at = 0;
     m_skipBytes = 0;
-    m_stream = 0;
-    m_decoded_frame = 0;
+    m_stream = nullptr;
+    m_decoded_frame = nullptr;
     m_channels = 0;
-    c = 0;
+    c = nullptr;
     audioIndex = 0;
     m_seekTime = -1;
     av_init_packet(&m_pkt);
@@ -145,7 +145,7 @@ bool DecoderFFmpeg::initialize()
     qDebug("DecoderFFmpeg: detected format: %s", fmt->long_name);
     qDebug("=%s=", fmt->name);
 
-    m_stream = avio_alloc_context(m_input_buf, INPUT_BUFFER_SIZE, 0, this, ffmpeg_read, NULL, ffmpeg_seek);
+    m_stream = avio_alloc_context(m_input_buf, INPUT_BUFFER_SIZE, 0, this, ffmpeg_read, nullptr, ffmpeg_seek);
     if(!m_stream)
     {
         qWarning("DecoderFFmpeg: unable to initialize I/O callbacks");
@@ -155,37 +155,37 @@ bool DecoderFFmpeg::initialize()
     m_stream->max_packet_size = INPUT_BUFFER_SIZE;
     ic->pb = m_stream;
 
-    if(avformat_open_input(&ic, 0, fmt, 0) != 0)
+    if(avformat_open_input(&ic, nullptr, fmt, nullptr) != 0)
     {
         qDebug("DecoderFFmpeg: avformat_open_input() failed");
         return false;
     }
-    avformat_find_stream_info(ic, 0);
+    avformat_find_stream_info(ic, nullptr);
     if(ic->pb)
         ic->pb->eof_reached = 0;
 
     if (input()->isSequential())
     {
         QMap<Qmmp::MetaData, QString> metaData;
-        AVDictionaryEntry *album = av_dict_get(ic->metadata,"album",0,0);
+        AVDictionaryEntry *album = av_dict_get(ic->metadata,"album",nullptr,0);
         if(!album)
-            album = av_dict_get(ic->metadata,"WM/AlbumTitle",0,0);
-        AVDictionaryEntry *artist = av_dict_get(ic->metadata,"artist",0,0);
+            album = av_dict_get(ic->metadata,"WM/AlbumTitle",nullptr,0);
+        AVDictionaryEntry *artist = av_dict_get(ic->metadata,"artist",nullptr,0);
         if(!artist)
-            artist = av_dict_get(ic->metadata,"author",0,0);
-        AVDictionaryEntry *comment = av_dict_get(ic->metadata,"comment",0,0);
-        AVDictionaryEntry *genre = av_dict_get(ic->metadata,"genre",0,0);
-        AVDictionaryEntry *title = av_dict_get(ic->metadata,"title",0,0);
-        AVDictionaryEntry *year = av_dict_get(ic->metadata,"WM/Year",0,0);
+            artist = av_dict_get(ic->metadata,"author",nullptr,0);
+        AVDictionaryEntry *comment = av_dict_get(ic->metadata,"comment",nullptr,0);
+        AVDictionaryEntry *genre = av_dict_get(ic->metadata,"genre",nullptr,0);
+        AVDictionaryEntry *title = av_dict_get(ic->metadata,"title",nullptr,0);
+        AVDictionaryEntry *year = av_dict_get(ic->metadata,"WM/Year",nullptr,0);
         if(!year)
-            year = av_dict_get(ic->metadata,"year",0,0);
+            year = av_dict_get(ic->metadata,"year",nullptr,0);
         if(!year)
-            year = av_dict_get(ic->metadata,"date",0,0);
-        AVDictionaryEntry *track = av_dict_get(ic->metadata,"track",0,0);
+            year = av_dict_get(ic->metadata,"date",nullptr,0);
+        AVDictionaryEntry *track = av_dict_get(ic->metadata,"track",nullptr,0);
         if(!track)
-            track = av_dict_get(ic->metadata,"WM/Track",0,0);
+            track = av_dict_get(ic->metadata,"WM/Track",nullptr,0);
         if(!track)
-            track = av_dict_get(ic->metadata,"WM/TrackNumber",0,0);
+            track = av_dict_get(ic->metadata,"WM/TrackNumber",nullptr,0);
 
         if(album)
             metaData.insert(Qmmp::ALBUM, QString::fromUtf8(album->value).trimmed());
@@ -209,12 +209,12 @@ bool DecoderFFmpeg::initialize()
     setReplayGainInfo(rg.replayGainInfo());
 
 #if (LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57,4,0)) //ffmpeg-3.1:  57.48.101
-    c = avcodec_alloc_context3(NULL);
+    c = avcodec_alloc_context3(nullptr);
 #endif
 
     ic->flags |= AVFMT_FLAG_GENPTS;
     av_read_play(ic);
-    audioIndex = av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO, -1, -1, 0, 0);
+    audioIndex = av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO, -1, -1, nullptr, 0);
     if(audioIndex < 0)
     {
         qWarning("DecoderFFmpeg: unable to find audio stream");
@@ -246,7 +246,7 @@ bool DecoderFFmpeg::initialize()
     m_channels = c->request_channels;
 #endif
 
-    av_dump_format(ic,0,0,0);
+    av_dump_format(ic,0,nullptr,0);
 
     AVCodec *codec = avcodec_find_decoder(c->codec_id);
 
@@ -256,7 +256,7 @@ bool DecoderFFmpeg::initialize()
         return false;
     }
 
-    if (avcodec_open2(c, codec, 0) < 0)
+    if (avcodec_open2(c, codec, nullptr) < 0)
     {
         qWarning("DecoderFFmpeg: error while opening codec for output stream");
         return false;
@@ -393,7 +393,7 @@ qint64 DecoderFFmpeg::ffmpeg_decode()
 #endif
 
         if(got_frame)
-            out_size = av_samples_get_buffer_size(0, c->channels, m_decoded_frame->nb_samples,
+            out_size = av_samples_get_buffer_size(nullptr, c->channels, m_decoded_frame->nb_samples,
                                                   c->sample_fmt, 1);
         else
             out_size = 0;
@@ -517,7 +517,7 @@ void DecoderFFmpeg::fillBuffer()
 #else
                     av_free_packet(&m_pkt);
 #endif
-                m_pkt.data = 0;
+                m_pkt.data = nullptr;
                 m_temp_pkt.size = 0;
                 break;
             }
@@ -531,7 +531,7 @@ void DecoderFFmpeg::fillBuffer()
 #else
                 av_free_packet(&m_pkt);
 #endif
-            m_pkt.data = 0;
+            m_pkt.data = nullptr;
             m_temp_pkt.size = 0;
             continue;
         }
diff --git a/src/plugins/Input/ffmpeg/decoderffmpegfactory.cpp b/src/plugins/Input/ffmpeg/decoderffmpegfactory.cpp
index f10186c69..abca4bfb6 100644
--- a/src/plugins/Input/ffmpeg/decoderffmpegfactory.cpp
+++ b/src/plugins/Input/ffmpeg/decoderffmpegfactory.cpp
@@ -165,12 +165,12 @@ QList<TrackInfo *> DecoderFFmpegFactory::createPlayList(const QString &path, Tra
     if(parts == TrackInfo::NoParts)
         return QList<TrackInfo*>() << info;
 
-    AVFormatContext *in = 0;
+    AVFormatContext *in = nullptr;
 
 #ifdef Q_OS_WIN
-    if(avformat_open_input(&in, path.toUtf8().constData(), 0, 0) < 0)
+    if(avformat_open_input(&in, path.toUtf8().constData(), nullptr, nullptr) < 0)
 #else
-    if(avformat_open_input(&in, path.toLocal8Bit().constData(), 0, 0) < 0)
+    if(avformat_open_input(&in, path.toLocal8Bit().constData(), nullptr, nullptr) < 0)
 #endif
     {
         qDebug("DecoderFFmpegFactory: unable to open file");
@@ -178,29 +178,29 @@ QList<TrackInfo *> DecoderFFmpegFactory::createPlayList(const QString &path, Tra
         return  QList<TrackInfo*>();
     }
 
-    avformat_find_stream_info(in, 0);
+    avformat_find_stream_info(in, nullptr);
 
     if(parts & TrackInfo::MetaData)
     {
-        AVDictionaryEntry *album = av_dict_get(in->metadata,"album",0,0);
+        AVDictionaryEntry *album = av_dict_get(in->metadata,"album",nullptr,0);
         if(!album)
-            album = av_dict_get(in->metadata,"WM/AlbumTitle",0,0);
-        AVDictionaryEntry *artist = av_dict_get(in->metadata,"artist",0,0);
+            album = av_dict_get(in->metadata,"WM/AlbumTitle",nullptr,0);
+        AVDictionaryEntry *artist = av_dict_get(in->metadata,"artist",nullptr,0);
         if(!artist)
-            artist = av_dict_get(in->metadata,"author",0,0);
-        AVDictionaryEntry *comment = av_dict_get(in->metadata,"comment",0,0);
-        AVDictionaryEntry *genre = av_dict_get(in->metadata,"genre",0,0);
-        AVDictionaryEntry *title = av_dict_get(in->metadata,"title",0,0);
-        AVDictionaryEntry *year = av_dict_get(in->metadata,"WM/Year",0,0);
+            artist = av_dict_get(in->metadata,"author",nullptr,0);
+        AVDictionaryEntry *comment = av_dict_get(in->metadata,"comment",nullptr,0);
+        AVDictionaryEntry *genre = av_dict_get(in->metadata,"genre",nullptr,0);
+        AVDictionaryEntry *title = av_dict_get(in->metadata,"title",nullptr,0);
+        AVDictionaryEntry *year = av_dict_get(in->metadata,"WM/Year",nullptr,0);
         if(!year)
-            year = av_dict_get(in->metadata,"year",0,0);
+            year = av_dict_get(in->metadata,"year",nullptr,0);
         if(!year)
-            year = av_dict_get(in->metadata,"date",0,0);
-        AVDictionaryEntry *track = av_dict_get(in->metadata,"track",0,0);
+            year = av_dict_get(in->metadata,"date",nullptr,0);
+        AVDictionaryEntry *track = av_dict_get(in->metadata,"track",nullptr,0);
         if(!track)
-            track = av_dict_get(in->metadata,"WM/Track",0,0);
+            track = av_dict_get(in->metadata,"WM/Track",nullptr,0);
         if(!track)
-            track = av_dict_get(in->metadata,"WM/TrackNumber",0,0);
+            track = av_dict_get(in->metadata,"WM/TrackNumber",nullptr,0);
 
         if(album)
             info->setValue(Qmmp::ALBUM, QString::fromUtf8(album->value));
@@ -220,7 +220,7 @@ QList<TrackInfo *> DecoderFFmpegFactory::createPlayList(const QString &path, Tra
 
     if(parts & TrackInfo::Properties)
     {
-        int idx = av_find_best_stream(in, AVMEDIA_TYPE_AUDIO, -1, -1, 0, 0);
+        int idx = av_find_best_stream(in, AVMEDIA_TYPE_AUDIO, -1, -1, nullptr, 0);
         if(idx >= 0)
         {
     #if (LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57,48,0)) //ffmpeg-3.1:  57.48.101
diff --git a/src/plugins/Input/ffmpeg/ffmpegmetadatamodel.cpp b/src/plugins/Input/ffmpeg/ffmpegmetadatamodel.cpp
index d3b725744..17907d0cd 100644
--- a/src/plugins/Input/ffmpeg/ffmpegmetadatamodel.cpp
+++ b/src/plugins/Input/ffmpeg/ffmpegmetadatamodel.cpp
@@ -23,14 +23,14 @@
 
 FFmpegMetaDataModel::FFmpegMetaDataModel(const QString &path) : MetaDataModel(true)
 {
-    m_in = 0;
+    m_in = nullptr;
 #ifdef Q_OS_WIN
-    if (avformat_open_input(&m_in, path.toUtf8().constData(), 0, 0) < 0)
+    if (avformat_open_input(&m_in, path.toUtf8().constData(), nullptr, nullptr) < 0)
 #else
-    if (avformat_open_input(&m_in, path.toLocal8Bit().constData(), 0, 0) < 0)
+    if (avformat_open_input(&m_in, path.toLocal8Bit().constData(), nullptr, nullptr) < 0)
 #endif
         return;
-    avformat_find_stream_info(m_in, 0);
+    avformat_find_stream_info(m_in, nullptr);
     av_read_play(m_in);
 }
 
@@ -45,9 +45,9 @@ QPixmap FFmpegMetaDataModel::cover() const
     if(!m_in)
         return QPixmap();
 #if (LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57,48,0)) //ffmpeg-3.1:  57.48.101
-    AVCodecParameters *c = 0;
+    AVCodecParameters *c = nullptr;
 #else
-    AVCodecContext *c = 0;
+    AVCodecContext *c = nullptr;
 #endif
 
     for (uint idx = 0; idx < m_in->nb_streams; idx++)
diff --git a/src/plugins/Input/ffmpeg/replaygainreader.cpp b/src/plugins/Input/ffmpeg/replaygainreader.cpp
index 13c796614..3d4a11d22 100644
--- a/src/plugins/Input/ffmpeg/replaygainreader.cpp
+++ b/src/plugins/Input/ffmpeg/replaygainreader.cpp
@@ -22,7 +22,7 @@
 
 ReplayGainReader::ReplayGainReader(AVFormatContext *ic)
 {
-    AVDictionaryEntry *t = 0;
+    AVDictionaryEntry *t = nullptr;
     while((t = av_dict_get(ic->metadata, "", t, AV_DICT_IGNORE_SUFFIX)))
     {
         if(!strcmp(t->key, "replaygain_album_gain"))
diff --git a/src/plugins/Input/ffmpeg/settingsdialog.h b/src/plugins/Input/ffmpeg/settingsdialog.h
index be1bbf22b..599c3481e 100644
--- a/src/plugins/Input/ffmpeg/settingsdialog.h
+++ b/src/plugins/Input/ffmpeg/settingsdialog.h
@@ -31,7 +31,7 @@ class SettingsDialog : public QDialog
 {
     Q_OBJECT
 public:
-    SettingsDialog(QWidget *parent = 0);
+    SettingsDialog(QWidget *parent = nullptr);
 
     ~SettingsDialog();
 
diff --git a/src/plugins/Input/flac/decoder_flac.cpp b/src/plugins/Input/flac/decoder_flac.cpp
index 29bd4b119..0f2c14df2 100644
--- a/src/plugins/Input/flac/decoder_flac.cpp
+++ b/src/plugins/Input/flac/decoder_flac.cpp
@@ -266,13 +266,13 @@ DecoderFLAC::DecoderFLAC(const QString &path, QIODevice *i)
 {
     m_path = path;
     m_data = new flac_data;
-    m_data->decoder = NULL;
+    m_data->decoder = nullptr;
     m_data->input = i;
-    m_parser = 0;
+    m_parser = nullptr;
     length_in_bytes = 0;
     m_totalBytes = 0;
     m_sz = 0;
-    m_buf = 0;
+    m_buf = nullptr;
     m_offset = 0;
     m_track = 0;
 }
@@ -286,11 +286,11 @@ DecoderFLAC::~DecoderFLAC()
         if (m_data->decoder)
             FLAC__stream_decoder_delete(m_data->decoder);
         delete m_data;
-        m_data = 0;
+        m_data = nullptr;
     }
     if(m_buf)
         delete[] m_buf;
-    m_buf = 0;
+    m_buf = nullptr;
 }
 
 bool DecoderFLAC::initialize()
@@ -506,7 +506,7 @@ qint64 DecoderFLAC::read(unsigned char *buf, qint64 size)
             if(size >= m_buf_size)
             {
                 delete[] m_buf;
-                m_buf = 0;
+                m_buf = nullptr;
                 m_buf_size = 0;
             }
             else
@@ -547,11 +547,11 @@ void DecoderFLAC::deinit()
     {
         m_data->input->close();
         delete m_data->input;
-        m_data->input = 0;
+        m_data->input = nullptr;
     };
     if(m_parser)
         delete m_parser;
-    m_parser = 0;
+    m_parser = nullptr;
 }
 
 const QString DecoderFLAC::nextURL() const
diff --git a/src/plugins/Input/flac/decoderflacfactory.cpp b/src/plugins/Input/flac/decoderflacfactory.cpp
index 02ae1f6bf..28aec227a 100644
--- a/src/plugins/Input/flac/decoderflacfactory.cpp
+++ b/src/plugins/Input/flac/decoderflacfactory.cpp
@@ -91,11 +91,11 @@ QList<TrackInfo*> DecoderFLACFactory::createPlayList(const QString &path, TrackI
     if(parts == TrackInfo::NoParts)
         return QList<TrackInfo *>() << info;
 
-    TagLib::Ogg::XiphComment *tag = 0;
-    TagLib::FLAC::Properties *ap = 0;
+    TagLib::Ogg::XiphComment *tag = nullptr;
+    TagLib::FLAC::Properties *ap = nullptr;
 
-    TagLib::FLAC::File *flacFile = 0;
-    TagLib::Ogg::FLAC::File *oggFlacFile = 0;
+    TagLib::FLAC::File *flacFile = nullptr;
+    TagLib::Ogg::FLAC::File *oggFlacFile = nullptr;
 
     TagLib::FileStream stream(QStringToFileName(path), true);
 
@@ -200,7 +200,7 @@ MetaDataModel* DecoderFLACFactory::createMetaDataModel(const QString &path, bool
     if (!path.contains("://") || path.startsWith("flac://"))
         return new FLACMetaDataModel(path, readOnly);
     else
-        return 0;
+        return nullptr;
 }
 
 void DecoderFLACFactory::showSettings(QWidget *)
diff --git a/src/plugins/Input/flac/flacmetadatamodel.cpp b/src/plugins/Input/flac/flacmetadatamodel.cpp
index ca06512b9..0457d22ef 100644
--- a/src/plugins/Input/flac/flacmetadatamodel.cpp
+++ b/src/plugins/Input/flac/flacmetadatamodel.cpp
@@ -38,9 +38,9 @@ FLACMetaDataModel::FLACMetaDataModel(const QString &path, bool readOnly)
     : MetaDataModel(true)
 #endif
 {
-    m_file = 0;
-    m_stream = 0;
-    m_tag = 0;
+    m_file = nullptr;
+    m_stream = nullptr;
+    m_tag = nullptr;
 
     if(path.startsWith("flac://"))
     {
@@ -81,7 +81,7 @@ FLACMetaDataModel::~FLACMetaDataModel()
     if(m_file)
     {
         delete m_file;
-        m_file = 0;
+        m_file = nullptr;
     }
     if(m_stream)
         delete m_stream;
diff --git a/src/plugins/Input/gme/decoder_gme.cpp b/src/plugins/Input/gme/decoder_gme.cpp
index 3eca96348..4de43f802 100644
--- a/src/plugins/Input/gme/decoder_gme.cpp
+++ b/src/plugins/Input/gme/decoder_gme.cpp
@@ -26,7 +26,7 @@
 DecoderGme::DecoderGme(const QString &path) : Decoder()
 {
     m_path = path;
-    m_emu = 0;
+    m_emu = nullptr;
 }
 
 DecoderGme::~DecoderGme()
@@ -44,7 +44,7 @@ bool DecoderGme::initialize()
     {
         qWarning("DecoderGme: track number is out of range");
         gme_delete(m_emu);
-        m_emu = 0;
+        m_emu = nullptr;
         return false;
     }
     gme_start_track(m_emu, track - 1);
diff --git a/src/plugins/Input/gme/decodergmefactory.cpp b/src/plugins/Input/gme/decodergmefactory.cpp
index cbd7fed44..50fee26a1 100644
--- a/src/plugins/Input/gme/decodergmefactory.cpp
+++ b/src/plugins/Input/gme/decodergmefactory.cpp
@@ -89,7 +89,7 @@ MetaDataModel* DecoderGmeFactory::createMetaDataModel(const QString &path, bool
 {
     Q_UNUSED(path);
     Q_UNUSED(readOnly);
-    return 0;
+    return nullptr;
 }
 
 void DecoderGmeFactory::showSettings(QWidget *parent)
diff --git a/src/plugins/Input/gme/gmehelper.cpp b/src/plugins/Input/gme/gmehelper.cpp
index 04a335701..fad5274f5 100644
--- a/src/plugins/Input/gme/gmehelper.cpp
+++ b/src/plugins/Input/gme/gmehelper.cpp
@@ -25,7 +25,7 @@
 
 GmeHelper::GmeHelper()
 {
-     m_emu = 0;
+     m_emu = nullptr;
 
      QSettings settings(Qmmp::configFile(), QSettings::IniFormat);
      m_fade_length = settings.value("GME/fadeout_length", 7000).toInt();
@@ -37,41 +37,41 @@ GmeHelper::~GmeHelper()
 {
     if(m_emu)
         gme_delete(m_emu);
-    m_emu = 0;
+    m_emu = nullptr;
 }
 
 Music_Emu *GmeHelper::load(const QString &url, int sample_rate)
 {
     if(m_emu)
         gme_delete(m_emu);
-    m_emu = 0;
+    m_emu = nullptr;
     QString path = url;
     if(url.contains("://"))
     {
         path.remove("gme://");
         path.remove(QRegExp("#\\d+$"));
     }
-    const char *err = 0;
+    const char *err = nullptr;
     gme_type_t file_type;
     if((err = gme_identify_file(qPrintable(path),&file_type)))
     {
         qWarning("GmeHelper: %s", err);
-        return 0;
+        return nullptr;
     }
     if(!file_type)
     {
         qWarning("DecoderGme: unsupported music type");
-        return 0;
+        return nullptr;
     }
     if(!(m_emu = gme_new_emu(file_type, sample_rate)))
     {
         qWarning("GmeHelper: out of memory");
-        return 0;
+        return nullptr;
     }
     if((err = gme_load_file(m_emu, qPrintable(path))))
     {
         qWarning("GmeHelper: %s", err);
-        return 0;
+        return nullptr;
     }
     QString m3u_path = path.left(path.lastIndexOf("."));
     m3u_path.append(".m3u");
diff --git a/src/plugins/Input/gme/settingsdialog.h b/src/plugins/Input/gme/settingsdialog.h
index c320153b7..5b4df41da 100644
--- a/src/plugins/Input/gme/settingsdialog.h
+++ b/src/plugins/Input/gme/settingsdialog.h
@@ -32,7 +32,7 @@ class SettingsDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit SettingsDialog(QWidget *parent = 0);
+    explicit SettingsDialog(QWidget *parent = nullptr);
     ~SettingsDialog();
 
 public slots:
diff --git a/src/plugins/Input/modplug/archivereader.h b/src/plugins/Input/modplug/archivereader.h
index 3357e1142..7a714e385 100644
--- a/src/plugins/Input/modplug/archivereader.h
+++ b/src/plugins/Input/modplug/archivereader.h
@@ -32,7 +32,7 @@ class ArchiveReader : public QObject
 {
 Q_OBJECT
 public:
-    ArchiveReader(QObject *parent = 0);
+    ArchiveReader(QObject *parent = nullptr);
 
     ~ArchiveReader();
 
diff --git a/src/plugins/Input/modplug/decoder_modplug.cpp b/src/plugins/Input/modplug/decoder_modplug.cpp
index 2c386e7ee..a2924c183 100644
--- a/src/plugins/Input/modplug/decoder_modplug.cpp
+++ b/src/plugins/Input/modplug/decoder_modplug.cpp
@@ -39,16 +39,16 @@
 
 // Decoder class
 
-DecoderModPlug* DecoderModPlug::m_instance = 0;
+DecoderModPlug* DecoderModPlug::m_instance = nullptr;
 
-DecoderModPlug::DecoderModPlug(const QString &path) : Decoder(0)
+DecoderModPlug::DecoderModPlug(const QString &path) : Decoder(nullptr)
 {
     m_path = path;
     m_freq = 0;
     m_bitrate = 0;
     m_totalTime = 0;
     m_chan = 0;
-    m_soundFile = 0;
+    m_soundFile = nullptr;
     m_sampleSize = 0;
     m_instance = this;
     m_bps = 0;
@@ -60,7 +60,7 @@ DecoderModPlug::~DecoderModPlug()
 {
     deinit();
     if(m_instance == this)
-        m_instance = 0;
+        m_instance = nullptr;
 }
 
 bool DecoderModPlug::initialize()
@@ -166,7 +166,7 @@ void DecoderModPlug::deinit()
     {
         m_soundFile->Destroy();
         delete m_soundFile;
-        m_soundFile = 0;
+        m_soundFile = nullptr;
     }
     m_input_buf.clear();
 }
diff --git a/src/plugins/Input/modplug/decodermodplugfactory.cpp b/src/plugins/Input/modplug/decodermodplugfactory.cpp
index 1e3174e88..bcba93e9c 100644
--- a/src/plugins/Input/modplug/decodermodplugfactory.cpp
+++ b/src/plugins/Input/modplug/decodermodplugfactory.cpp
@@ -73,7 +73,7 @@ QList<TrackInfo *> DecoderModPlugFactory::createPlayList(const QString &path, Tr
 
     QByteArray buffer;
 
-    ArchiveReader reader(0);
+    ArchiveReader reader(nullptr);
     if (reader.isSupported(path))
     {
         buffer = reader.unpack(path);
diff --git a/src/plugins/Input/modplug/modplugmetadatamodel.cpp b/src/plugins/Input/modplug/modplugmetadatamodel.cpp
index 059901e71..9d4248dd6 100644
--- a/src/plugins/Input/modplug/modplugmetadatamodel.cpp
+++ b/src/plugins/Input/modplug/modplugmetadatamodel.cpp
@@ -31,7 +31,7 @@
 
 ModPlugMetaDataModel::ModPlugMetaDataModel(const QString &path) : MetaDataModel(true)
 {
-    m_soundFile = 0;
+    m_soundFile = nullptr;
     m_path = path;
     ArchiveReader reader(nullptr);
     if(reader.isSupported(m_path))
diff --git a/src/plugins/Input/modplug/settingsdialog.h b/src/plugins/Input/modplug/settingsdialog.h
index e154aaa32..bbd73129f 100644
--- a/src/plugins/Input/modplug/settingsdialog.h
+++ b/src/plugins/Input/modplug/settingsdialog.h
@@ -32,7 +32,7 @@ class SettingsDialog : public QDialog
 {
 Q_OBJECT
 public:
-    SettingsDialog(QWidget *parent = 0);
+    SettingsDialog(QWidget *parent = nullptr);
 
     ~SettingsDialog();
 
diff --git a/src/plugins/Input/mpc/decoder_mpc.cpp b/src/plugins/Input/mpc/decoder_mpc.cpp
index 3df2165b3..714ed0d89 100644
--- a/src/plugins/Input/mpc/decoder_mpc.cpp
+++ b/src/plugins/Input/mpc/decoder_mpc.cpp
@@ -66,7 +66,7 @@ DecoderMPC::DecoderMPC(QIODevice *i)
     m_len = 0;
     m_bitrate = 0;
     m_totalTime = 0.0;
-    m_data = 0;
+    m_data = nullptr;
 }
 
 DecoderMPC::~DecoderMPC()
@@ -77,7 +77,7 @@ DecoderMPC::~DecoderMPC()
         if(m_data->demuxer)
             mpc_demux_exit(m_data->demuxer);
         delete m_data;
-        m_data = 0;
+        m_data = nullptr;
     }
 }
 
diff --git a/src/plugins/Input/mpc/mpcmetadatamodel.cpp b/src/plugins/Input/mpc/mpcmetadatamodel.cpp
index fd7b56481..3326bba6e 100644
--- a/src/plugins/Input/mpc/mpcmetadatamodel.cpp
+++ b/src/plugins/Input/mpc/mpcmetadatamodel.cpp
@@ -174,7 +174,7 @@ void MPCFileTagModel::setValue(Qmmp::MetaData key, const QString &value)
 
 bool MPCFileTagModel::exists() const
 {
-    return (m_tag != 0);
+    return (m_tag != nullptr);
 }
 
 void MPCFileTagModel::create()
@@ -189,7 +189,7 @@ void MPCFileTagModel::create()
 
 void MPCFileTagModel::remove()
 {
-    m_tag = 0;
+    m_tag = nullptr;
 }
 
 void MPCFileTagModel::save()
diff --git a/src/plugins/Input/mpeg/decoder_mad.cpp b/src/plugins/Input/mpeg/decoder_mad.cpp
index d7625fc70..4e984db58 100644
--- a/src/plugins/Input/mpeg/decoder_mad.cpp
+++ b/src/plugins/Input/mpeg/decoder_mad.cpp
@@ -41,7 +41,7 @@ DecoderMAD::DecoderMAD(QIODevice *i) : Decoder(i)
     m_bitrate = 0;
     m_freq = 0;
     m_len = 0;
-    m_input_buf = 0;
+    m_input_buf = nullptr;
     m_input_bytes = 0;
     m_skip_frames = 0;
     m_eof = false;
@@ -56,7 +56,7 @@ DecoderMAD::~DecoderMAD()
     {
         qDebug("DecoderMAD: deleting input_buf");
         delete [] m_input_buf;
-        m_input_buf = 0;
+        m_input_buf = nullptr;
     }
 }
 
@@ -98,7 +98,7 @@ bool DecoderMAD::initialize()
     mad_stream_buffer(&m_stream, (unsigned char *) m_input_buf, m_input_bytes);
     m_stream.error = MAD_ERROR_BUFLEN;
     mad_frame_mute (&m_frame);
-    m_stream.next_frame = 0;
+    m_stream.next_frame = nullptr;
     m_stream.sync = 0;
     ChannelMap map;
     if(m_channels == 1)
@@ -131,7 +131,7 @@ void DecoderMAD::deinit()
     if(m_xing.lame)
     {
         delete m_xing.lame;
-        m_xing.lame = 0;
+        m_xing.lame = nullptr;
     }
 }
 
@@ -204,17 +204,17 @@ bool DecoderMAD::findXingHeader(struct mad_bitptr ptr, unsigned int bitlen)
 DecoderMAD::LameHeader* DecoderMAD::findLameHeader(mad_bitptr ptr, unsigned int bitlen)
 {
     if(bitlen < 272)
-        return 0;
+        return nullptr;
 
     if(mad_bit_read (&ptr, 32) != LAME_MAGIC)
-        return 0;
+        return nullptr;
 
     LameHeader header;
     mad_bit_skip (&ptr, 40); //version
 
     header.revision = mad_bit_read (&ptr, 4);
     if (header.revision == 15)
-        return 0;
+        return nullptr;
 
     mad_bit_skip(&ptr, 12); //VBR,Lowpass filter value
     header.peak = mad_bit_read(&ptr, 32) << 5; //Peak amplitude
@@ -428,7 +428,7 @@ void DecoderMAD::seek(qint64 pos)
         m_stream.error = MAD_ERROR_BUFLEN;
         m_stream.sync = 0;
         m_input_bytes = 0;
-        m_stream.next_frame = 0;
+        m_stream.next_frame = nullptr;
         m_skip_frames = 2;
         m_skip_bytes = 0;
         m_play_bytes = -1;
diff --git a/src/plugins/Input/mpeg/decoder_mad.h b/src/plugins/Input/mpeg/decoder_mad.h
index 9768213a1..8980f1768 100644
--- a/src/plugins/Input/mpeg/decoder_mad.h
+++ b/src/plugins/Input/mpeg/decoder_mad.h
@@ -89,7 +89,7 @@ private:
             frames = 0;
             bytes = 0;
             scale = 0;
-            lame = 0;
+            lame = nullptr;
         }
     };
     XingHeader m_xing;
diff --git a/src/plugins/Input/mpeg/decoder_mpg123.cpp b/src/plugins/Input/mpeg/decoder_mpg123.cpp
index 8c6c0cf27..9a1a5f18b 100644
--- a/src/plugins/Input/mpeg/decoder_mpg123.cpp
+++ b/src/plugins/Input/mpeg/decoder_mpg123.cpp
@@ -66,14 +66,14 @@ DecoderMPG123::DecoderMPG123(QIODevice *i) : Decoder(i)
     m_rate = 0;
     m_frame_info.bitrate = 0;
     m_mpg123_encoding = MPG123_ENC_SIGNED_16;
-    m_handle = 0;
+    m_handle = nullptr;
     m_errors = 0;
 }
 
 DecoderMPG123::~DecoderMPG123()
 {
     cleanup(m_handle);
-    m_handle = 0;
+    m_handle = nullptr;
 }
 
 bool DecoderMPG123::initialize()
@@ -94,7 +94,7 @@ bool DecoderMPG123::initialize()
     }
     int channels = 0;
 
-    if(!(m_handle = mpg123_new(0, &err)))
+    if(!(m_handle = mpg123_new(nullptr, &err)))
     {
         qWarning("DecoderMPG123: basic setup goes wrong: %s", mpg123_plain_strerror(err));
         return false;
@@ -102,11 +102,11 @@ bool DecoderMPG123::initialize()
 
     mpg123_param (m_handle, MPG123_ADD_FLAGS, MPG123_SEEKBUFFER | MPG123_FUZZY, 0);
 
-    if((err = mpg123_replace_reader_handle(m_handle, mpg123_read_cb, mpg123_seek_cb, 0)) != MPG123_OK)
+    if((err = mpg123_replace_reader_handle(m_handle, mpg123_read_cb, mpg123_seek_cb, nullptr)) != MPG123_OK)
     {
         qWarning("DecoderMPG123: mpg123 error: %s", mpg123_plain_strerror(err));
         cleanup(m_handle);
-        m_handle = 0;
+        m_handle = nullptr;
         return false;
     }
     setMPG123Format(MPG123_ENC_FLOAT_32);
@@ -115,7 +115,7 @@ bool DecoderMPG123::initialize()
     {
         qWarning("DecoderMPG123: mpg123 error: %s", mpg123_plain_strerror(err));
         cleanup(m_handle);
-        m_handle = 0;
+        m_handle = nullptr;
         return false;
     }
 
@@ -123,7 +123,7 @@ bool DecoderMPG123::initialize()
     {
         qWarning("DecoderMPG123: mpg123 error: %s", mpg123_plain_strerror(err));
         cleanup(m_handle);
-        m_handle = 0;
+        m_handle = nullptr;
         return false;
     }
     //check format
@@ -131,7 +131,7 @@ bool DecoderMPG123::initialize()
     {
         cleanup(m_handle);
         qWarning("DecoderMPG123: bad encoding: 0x%x!\n", m_mpg123_encoding);
-        m_handle = 0;
+        m_handle = nullptr;
         return false;
     }
 
diff --git a/src/plugins/Input/mpeg/decodermpegfactory.cpp b/src/plugins/Input/mpeg/decodermpegfactory.cpp
index 0c1356262..a251fc750 100644
--- a/src/plugins/Input/mpeg/decodermpegfactory.cpp
+++ b/src/plugins/Input/mpeg/decodermpegfactory.cpp
@@ -136,7 +136,7 @@ bool DecoderMPEGFactory::canDecode(QIODevice *input) const
     if (decoderName != "mpg123")
     {
         mpg123_init();
-        mpg123_handle *handle = mpg123_new(0, 0);
+        mpg123_handle *handle = mpg123_new(nullptr, nullptr);
         if (!handle)
             return false;
         if(mpg123_open_feed(handle) != MPG123_OK)
@@ -151,7 +151,7 @@ bool DecoderMPEGFactory::canDecode(QIODevice *input) const
             return false;
         }
         size_t out_size = 0;
-        int ret = mpg123_decode(handle, (unsigned char*) buf, dataSize, 0, 0, &out_size);
+        int ret = mpg123_decode(handle, (unsigned char*) buf, dataSize, nullptr, 0, &out_size);
         mpg123_close(handle);
         mpg123_delete(handle);
         return ret == MPG123_DONE || ret == MPG123_NEW_FORMAT;
@@ -175,7 +175,7 @@ DecoderProperties DecoderMPEGFactory::properties() const
 
 Decoder *DecoderMPEGFactory::create(const QString &, QIODevice *input)
 {
-    Decoder *d = 0;
+    Decoder *d = nullptr;
 #if defined(WITH_MAD) && defined(WITH_MPG123)
     QSettings settings(Qmmp::configFile(), QSettings::IniFormat);
     if(settings.value("MPEG/decoder", "mad").toString() == "mpg123")
@@ -203,7 +203,7 @@ QList<TrackInfo *> DecoderMPEGFactory::createPlayList(const QString &path, Track
     if(parts == TrackInfo::NoParts)
         return QList<TrackInfo*>() << info;
 
-    TagLib::Tag *tag = 0;
+    TagLib::Tag *tag = nullptr;
     TagLib::FileStream stream(QStringToFileName(path), true);
     TagLib::MPEG::File fileRef(&stream, TagLib::ID3v2::FrameFactory::instance());
 
@@ -212,7 +212,7 @@ QList<TrackInfo *> DecoderMPEGFactory::createPlayList(const QString &path, Track
         QSettings settings(Qmmp::configFile(), QSettings::IniFormat);
         settings.beginGroup("MPEG");
 
-        QTextCodec *codec = 0;
+        QTextCodec *codec = nullptr;
 
         uint tag_array[3];
         tag_array[0] = settings.value("tag_1", SettingsDialog::ID3v2).toInt();
@@ -324,7 +324,7 @@ QList<TrackInfo *> DecoderMPEGFactory::createPlayList(const QString &path, Track
         if(fileRef.ID3v2Tag() && !fileRef.ID3v2Tag()->isEmpty())
         {
             TagLib::ID3v2::Tag *tag = fileRef.ID3v2Tag();
-            TagLib::ID3v2::UserTextIdentificationFrame* frame = 0;
+            TagLib::ID3v2::UserTextIdentificationFrame *frame = nullptr;
             TagLib::ID3v2::FrameList frames = tag->frameList("TXXX");
             for(TagLib::ID3v2::FrameList::Iterator it = frames.begin(); it != frames.end(); ++it)
             {
diff --git a/src/plugins/Input/mpeg/mpegmetadatamodel.cpp b/src/plugins/Input/mpeg/mpegmetadatamodel.cpp
index d4760ea88..a960a15a3 100644
--- a/src/plugins/Input/mpeg/mpegmetadatamodel.cpp
+++ b/src/plugins/Input/mpeg/mpegmetadatamodel.cpp
@@ -380,7 +380,7 @@ void MpegFileTagModel::setValue(Qmmp::MetaData key, const QString &value)
 
 bool MpegFileTagModel::exists() const
 {
-    return (m_tag != 0);
+    return (m_tag != nullptr);
 }
 
 void MpegFileTagModel::create()
@@ -397,7 +397,7 @@ void MpegFileTagModel::create()
 
 void MpegFileTagModel::remove()
 {
-    m_tag = 0;
+    m_tag = nullptr;
 }
 
 void MpegFileTagModel::save()
diff --git a/src/plugins/Input/mpeg/settingsdialog.h b/src/plugins/Input/mpeg/settingsdialog.h
index cdebaa15a..1a08d76f3 100644
--- a/src/plugins/Input/mpeg/settingsdialog.h
+++ b/src/plugins/Input/mpeg/settingsdialog.h
@@ -30,7 +30,7 @@ class SettingsDialog : public QDialog
 {
 Q_OBJECT
 public:
-    SettingsDialog(bool using_rusxmms, QWidget *parent = 0);
+    SettingsDialog(bool using_rusxmms, QWidget *parent = nullptr);
 
     ~SettingsDialog();
 
diff --git a/src/plugins/Input/mpeg/tagextractor.cpp b/src/plugins/Input/mpeg/tagextractor.cpp
index 1e1557947..948b57f67 100644
--- a/src/plugins/Input/mpeg/tagextractor.cpp
+++ b/src/plugins/Input/mpeg/tagextractor.cpp
@@ -59,7 +59,7 @@ const QMap<Qmmp::MetaData, QString> TagExtractor::id3v2tag()
     settings.beginGroup("MPEG");
     QByteArray name = settings.value("ID3v2_encoding","UTF-8").toByteArray ();
     bool utf = false;
-    QTextCodec *codec = 0;
+    QTextCodec *codec = nullptr;
     if (name.contains("UTF"))
     {
         codec = QTextCodec::codecForName ("UTF-8");
diff --git a/src/plugins/Input/opus/decoder_opus.cpp b/src/plugins/Input/opus/decoder_opus.cpp
index 1c68f7e55..92852afef 100644
--- a/src/plugins/Input/opus/decoder_opus.cpp
+++ b/src/plugins/Input/opus/decoder_opus.cpp
@@ -67,7 +67,7 @@ static opus_int64  opustell(void *src)
 DecoderOpus::DecoderOpus(const QString &url, QIODevice *i) : Decoder(i)
 {
     m_totalTime = 0;
-    m_opusfile = 0;
+    m_opusfile = nullptr;
     m_chan = 0;
     m_bitrate = 0;
     m_url = url;
@@ -77,7 +77,7 @@ DecoderOpus::~DecoderOpus()
 {
     if (m_opusfile)
         op_free(m_opusfile);
-    m_opusfile = 0;
+    m_opusfile = nullptr;
 }
 
 bool DecoderOpus::initialize()
@@ -97,9 +97,9 @@ bool DecoderOpus::initialize()
         opusread,
         opusseek,
         opustell,
-        0,
+        nullptr,
     };
-    m_opusfile = op_open_callbacks(this, &opuscb, 0, 0, 0);
+    m_opusfile = op_open_callbacks(this, &opuscb, nullptr, 0, nullptr);
 
     if (!m_opusfile)
     {
@@ -150,7 +150,7 @@ void DecoderOpus::seek(qint64 time)
 
 qint64 DecoderOpus::read(unsigned char *data, qint64 maxSize)
 {
-    int frames = op_read_float(m_opusfile, (float*) data, maxSize / sizeof(float), 0);
+    int frames = op_read_float(m_opusfile, (float*) data, maxSize / sizeof(float), nullptr);
     m_bitrate = op_bitrate_instant(m_opusfile) / 1000;
     return frames * m_chan * sizeof(float);
 }
diff --git a/src/plugins/Input/sid/decoder_sid.cpp b/src/plugins/Input/sid/decoder_sid.cpp
index 6fa67f577..889c762d3 100644
--- a/src/plugins/Input/sid/decoder_sid.cpp
+++ b/src/plugins/Input/sid/decoder_sid.cpp
@@ -32,7 +32,7 @@
 #include "decoder_sid.h"
 
 // Decoder class
-DecoderSID::DecoderSID(SidDatabase *db, const QString &url) : Decoder(), m_tune(0)
+DecoderSID::DecoderSID(SidDatabase *db, const QString &url) : Decoder(), m_tune(nullptr)
 {
     m_db = db;
     m_url = url;
@@ -102,7 +102,7 @@ bool DecoderSID::initialize()
 
     qDebug("DecoderSID: song length: %d", m_length);
 
-    sidbuilder *rs = 0;
+    sidbuilder *rs = nullptr;
     if(settings.value("engine", "residfp").toString() == "residfp")
     {
         rs = new ReSIDfpBuilder("ReSIDfp builder");
diff --git a/src/plugins/Input/sid/decodersidfactory.cpp b/src/plugins/Input/sid/decodersidfactory.cpp
index fa54057d8..c30c7ff6b 100644
--- a/src/plugins/Input/sid/decodersidfactory.cpp
+++ b/src/plugins/Input/sid/decodersidfactory.cpp
@@ -100,7 +100,7 @@ MetaDataModel* DecoderSIDFactory::createMetaDataModel(const QString &path, bool
 {
     Q_UNUSED(path);
     Q_UNUSED(readOnly);
-    return 0;
+    return nullptr;
 }
 
 void DecoderSIDFactory::showSettings(QWidget *parent)
diff --git a/src/plugins/Input/sid/settingsdialog.h b/src/plugins/Input/sid/settingsdialog.h
index 8bbdf3fec..01f784692 100644
--- a/src/plugins/Input/sid/settingsdialog.h
+++ b/src/plugins/Input/sid/settingsdialog.h
@@ -31,7 +31,7 @@ class SettingsDialog : public QDialog
 {
     Q_OBJECT
 public:
-    SettingsDialog(SidDatabase *db, QWidget *parent = 0);
+    SettingsDialog(SidDatabase *db, QWidget *parent = nullptr);
 
     virtual ~SettingsDialog();
 
diff --git a/src/plugins/Input/sid/sidhelper.cpp b/src/plugins/Input/sid/sidhelper.cpp
index 999edcbcf..9700b671f 100644
--- a/src/plugins/Input/sid/sidhelper.cpp
+++ b/src/plugins/Input/sid/sidhelper.cpp
@@ -24,7 +24,7 @@
 
 SIDHelper::SIDHelper(SidDatabase *db)
 {
-    m_tune = 0;
+    m_tune = nullptr;
     m_db = db;
 }
 
@@ -32,7 +32,7 @@ SIDHelper::~SIDHelper()
 {
     if(m_tune)
         delete m_tune;
-    m_tune = 0;
+    m_tune = nullptr;
 }
 
 SidTune *SIDHelper::load(const QString &url)
@@ -40,7 +40,7 @@ SidTune *SIDHelper::load(const QString &url)
     if(m_tune)
     {
         delete m_tune;
-        m_tune = 0;
+        m_tune = nullptr;
     }
     QString path = url;
     int track = 1;
diff --git a/src/plugins/Input/sndfile/decoder_sndfile.cpp b/src/plugins/Input/sndfile/decoder_sndfile.cpp
index d90859454..45607cb24 100644
--- a/src/plugins/Input/sndfile/decoder_sndfile.cpp
+++ b/src/plugins/Input/sndfile/decoder_sndfile.cpp
@@ -79,7 +79,7 @@ DecoderSndFile::DecoderSndFile(QIODevice *input) : Decoder(input)
     //m_path = input;
     m_bitrate = 0;
     m_totalTime = 0;
-    m_sndfile = 0;
+    m_sndfile = nullptr;
     m_freq = 0;
 }
 
@@ -118,7 +118,7 @@ bool DecoderSndFile::initialize()
     m_bitrate =  input()->size () * 8.0 / m_totalTime + 0.5;
 
     if((snd_info.format & SF_FORMAT_SUBMASK) == SF_FORMAT_FLOAT)
-        sf_command (m_sndfile, SFC_SET_SCALE_FLOAT_INT_READ, NULL, SF_TRUE);
+        sf_command (m_sndfile, SFC_SET_SCALE_FLOAT_INT_READ, nullptr, SF_TRUE);
 
     configure(m_freq, chan, Qmmp::PCM_S16LE);
     qDebug("DecoderSndFile: detected format: %08X", snd_info.format);
@@ -133,7 +133,7 @@ void DecoderSndFile::deinit()
     m_freq = 0;
     if (m_sndfile)
         sf_close(m_sndfile);
-    m_sndfile = 0;
+    m_sndfile = nullptr;
 }
 
 qint64 DecoderSndFile::totalTime() const
diff --git a/src/plugins/Input/sndfile/decodersndfilefactory.cpp b/src/plugins/Input/sndfile/decodersndfilefactory.cpp
index f786e091a..23084bb63 100644
--- a/src/plugins/Input/sndfile/decodersndfilefactory.cpp
+++ b/src/plugins/Input/sndfile/decodersndfilefactory.cpp
@@ -141,7 +141,7 @@ QList<TrackInfo *> DecoderSndFileFactory::createPlayList(const QString &path, Tr
         return QList<TrackInfo*>() << info;
 
     SF_INFO snd_info;
-    SNDFILE *sndfile = 0;
+    SNDFILE *sndfile = nullptr;
     memset(&snd_info, 0, sizeof(snd_info));
     snd_info.format = 0;
 #ifdef Q_OS_WIN
@@ -201,7 +201,7 @@ QList<TrackInfo *> DecoderSndFileFactory::createPlayList(const QString &path, Tr
         SF_FORMAT_INFO format_info;
         memset(&format_info, 0, sizeof(format_info));
         format_info.format = (snd_info.format & SF_FORMAT_TYPEMASK);
-        sf_command(0, SFC_GET_FORMAT_INFO, &format_info, sizeof(format_info));
+        sf_command(nullptr, SFC_GET_FORMAT_INFO, &format_info, sizeof(format_info));
         info->setValue(Qmmp::FORMAT_NAME, QString::fromLatin1(format_info.name));
         info->setDuration(int(snd_info.frames * 1000 / snd_info.samplerate));
     }
@@ -212,7 +212,7 @@ QList<TrackInfo *> DecoderSndFileFactory::createPlayList(const QString &path, Tr
 
 MetaDataModel* DecoderSndFileFactory::createMetaDataModel(const QString&, bool)
 {
-    return 0;
+    return nullptr;
 }
 
 void DecoderSndFileFactory::showSettings(QWidget *)
@@ -221,7 +221,7 @@ void DecoderSndFileFactory::showSettings(QWidget *)
 void DecoderSndFileFactory::showAbout(QWidget *parent)
 {
     char version [128] = { 0 };
-    sf_command (NULL, SFC_GET_LIB_VERSION, version, sizeof (version)) ;
+    sf_command (nullptr, SFC_GET_LIB_VERSION, version, sizeof (version)) ;
     QMessageBox::about (parent, tr("About Sndfile Audio Plugin"),
                         tr("Qmmp Sndfile Audio Plugin")+"\n"+
                         tr("Compiled against")+" "+QString(version)+"\n" +
diff --git a/src/plugins/Input/vorbis/decoder_vorbis.cpp b/src/plugins/Input/vorbis/decoder_vorbis.cpp
index 063398500..37f795192 100644
--- a/src/plugins/Input/vorbis/decoder_vorbis.cpp
+++ b/src/plugins/Input/vorbis/decoder_vorbis.cpp
@@ -103,7 +103,7 @@ bool DecoderVorbis::initialize()
         oggclose,
         oggtell
     };
-    if (ov_open_callbacks(this, &oggfile, NULL, 0, oggcb) < 0)
+    if (ov_open_callbacks(this, &oggfile, nullptr, 0, oggcb) < 0)
     {
         qWarning("DecoderVorbis: cannot open stream");
 
@@ -285,7 +285,7 @@ void DecoderVorbis::seek(qint64 time)
 qint64 DecoderVorbis::read(unsigned char *data, qint64 maxSize)
 {
     len = -1;
-    float **pcm = 0;
+    float **pcm = nullptr;
     int section = 0;
     while (len < 0)
         len = ov_read_float(&oggfile, &pcm, maxSize/sizeof(float), &section);
diff --git a/src/plugins/Input/wavpack/decoder_wavpack.cpp b/src/plugins/Input/wavpack/decoder_wavpack.cpp
index e97e1b95b..5ca7a1c50 100644
--- a/src/plugins/Input/wavpack/decoder_wavpack.cpp
+++ b/src/plugins/Input/wavpack/decoder_wavpack.cpp
@@ -38,9 +38,9 @@ DecoderWavPack::DecoderWavPack(const QString &path)
     m_path = path;
     m_totalTime = 0.0;
     m_chan = 0;
-    m_context = 0;
-    m_parser = 0;
-    m_output_buf = 0;
+    m_context = nullptr;
+    m_parser = nullptr;
+    m_output_buf = nullptr;
     m_length_in_bytes = 0;
     m_totalBytes = 0;
     m_frame_size = 0;
@@ -54,7 +54,7 @@ DecoderWavPack::~DecoderWavPack()
     deinit();
     if (m_output_buf)
         delete [] m_output_buf;
-    m_output_buf = 0;
+    m_output_buf = nullptr;
 }
 
 bool DecoderWavPack::initialize()
@@ -79,7 +79,7 @@ bool DecoderWavPack::initialize()
             qWarning("DecoderWavPack: error: %s", err);
             return false;
         }
-        int cue_len = WavpackGetTagItem (m_context, "cuesheet", NULL, 0);
+        int cue_len = WavpackGetTagItem (m_context, "cuesheet", nullptr, 0);
         char *value;
         if (cue_len)
         {
@@ -173,10 +173,10 @@ void DecoderWavPack::deinit()
     m_chan = 0;
     if (m_context)
         WavpackCloseFile (m_context);
-    m_context = 0;
+    m_context = nullptr;
     if(m_parser)
         delete m_parser;
-    m_parser = 0;
+    m_parser = nullptr;
 }
 
 void DecoderWavPack::seek(qint64 time)
diff --git a/src/plugins/Input/wavpack/decoderwavpackfactory.cpp b/src/plugins/Input/wavpack/decoderwavpackfactory.cpp
index f63ccc54d..139fe7494 100644
--- a/src/plugins/Input/wavpack/decoderwavpackfactory.cpp
+++ b/src/plugins/Input/wavpack/decoderwavpackfactory.cpp
@@ -96,7 +96,7 @@ QList<TrackInfo *> DecoderWavPackFactory::createPlayList(const QString &path, Tr
 
     if(parts & TrackInfo::MetaData)
     {
-        cue_len = WavpackGetTagItem (ctx, "cuesheet", NULL, 0);
+        cue_len = WavpackGetTagItem (ctx, "cuesheet", nullptr, 0);
         if (cue_len)
         {
             delete info;
@@ -165,7 +165,7 @@ MetaDataModel* DecoderWavPackFactory::createMetaDataModel(const QString &path, b
     if (!path.contains("://") || path.startsWith("wvpack://"))
         return new WavPackMetaDataModel(path, readOnly);
     else
-        return 0;
+        return nullptr;
 }
 
 void DecoderWavPackFactory::showSettings(QWidget *)
diff --git a/src/plugins/Input/wildmidi/decoder_wildmidi.cpp b/src/plugins/Input/wildmidi/decoder_wildmidi.cpp
index 198175d4c..f3c2e459c 100644
--- a/src/plugins/Input/wildmidi/decoder_wildmidi.cpp
+++ b/src/plugins/Input/wildmidi/decoder_wildmidi.cpp
@@ -26,7 +26,7 @@
 DecoderWildMidi::DecoderWildMidi(const QString &path) : Decoder()
 {
     m_path = path;
-    midi_ptr =  0;
+    midi_ptr = nullptr;
     m_sample_rate = 0;
 }
 
diff --git a/src/plugins/Input/wildmidi/decoderwildmidifactory.cpp b/src/plugins/Input/wildmidi/decoderwildmidifactory.cpp
index c57d14c49..540846af5 100644
--- a/src/plugins/Input/wildmidi/decoderwildmidifactory.cpp
+++ b/src/plugins/Input/wildmidi/decoderwildmidifactory.cpp
@@ -92,7 +92,7 @@ MetaDataModel* DecoderWildMidiFactory::createMetaDataModel(const QString &path,
 {
     Q_UNUSED(path);
     Q_UNUSED(readOnly);
-    return 0;
+    return nullptr;
 }
 
 void DecoderWildMidiFactory::showSettings(QWidget *parent)
diff --git a/src/plugins/Input/wildmidi/settingsdialog.h b/src/plugins/Input/wildmidi/settingsdialog.h
index 2b706f1f3..d190ebe7d 100644
--- a/src/plugins/Input/wildmidi/settingsdialog.h
+++ b/src/plugins/Input/wildmidi/settingsdialog.h
@@ -31,7 +31,7 @@ class SettingsDialog : public QDialog
 {
     Q_OBJECT
 public:
-    SettingsDialog(QWidget *parent = 0);
+    SettingsDialog(QWidget *parent = nullptr);
 
     ~SettingsDialog();
 
diff --git a/src/plugins/Input/wildmidi/wildmidihelper.cpp b/src/plugins/Input/wildmidi/wildmidihelper.cpp
index 612e544f7..812930561 100644
--- a/src/plugins/Input/wildmidi/wildmidihelper.cpp
+++ b/src/plugins/Input/wildmidi/wildmidihelper.cpp
@@ -26,7 +26,7 @@ extern "C"{
 #include <qmmp/qmmp.h>
 #include "wildmidihelper.h"
 
-WildMidiHelper *WildMidiHelper::m_instance = 0;
+WildMidiHelper *WildMidiHelper::m_instance = nullptr;
 
 WildMidiHelper::WildMidiHelper(QObject *parent) :
     QObject(parent)
@@ -40,7 +40,7 @@ WildMidiHelper::~WildMidiHelper()
 {
     if(m_inited)
         WildMidi_Shutdown();
-    m_instance = 0;
+    m_instance = nullptr;
 }
 
 bool WildMidiHelper::initialize()
diff --git a/src/plugins/Input/wildmidi/wildmidihelper.h b/src/plugins/Input/wildmidi/wildmidihelper.h
index 9c4141ecd..7d50775c7 100644
--- a/src/plugins/Input/wildmidi/wildmidihelper.h
+++ b/src/plugins/Input/wildmidi/wildmidihelper.h
@@ -29,7 +29,7 @@ class WildMidiHelper : public QObject
 {
 Q_OBJECT
 public:
-    explicit WildMidiHelper(QObject *parent = 0);
+    explicit WildMidiHelper(QObject *parent = nullptr);
     ~WildMidiHelper();
     bool initialize();
     void readSettings();