Show metadata for audio/video files in player example

Change-Id: I10748df06e9866c3121015c657b579aa27ac4450
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

4 files changed, 119 insertions, 4 deletions

diff --git a/examples/multimediawidgets/player/player.cpp b/examples/multimediawidgets/player/player.cpp
index ed04ff75f..60745ffe9 100644
--- a/examples/multimediawidgets/player/player.cpp
+++ b/examples/multimediawidgets/player/player.cpp
@@ -112,6 +112,26 @@ Player::Player(QWidget *parent)
     histogramLayout->addWidget(m_videoHistogram, 1);
     histogramLayout->addWidget(m_audioHistogram, 2);
 
+    QLabel *metaDataLabel = new QLabel(tr("Metadata for file:"));
+    QGridLayout *metaDataLayout = new QGridLayout;
+    int key = QMediaMetaData::Title;
+    for (int i = 0; i < 9; i++) {
+        for (int j = 0; j < 6; j+=2) {
+            m_metaDataLabels[key] = new QLabel(QMediaMetaData::metaDataKeyToString
+                                    (static_cast<QMediaMetaData::Key>(key)));
+            if (key == QMediaMetaData::ThumbnailImage
+                    || key == QMediaMetaData::CoverArtImage)
+                m_metaDataFields[key] = new QLabel;
+            else
+                m_metaDataFields[key] = new QLineEdit;
+            m_metaDataLabels[key]->setDisabled(true);
+            m_metaDataFields[key]->setDisabled(true);
+            metaDataLayout->addWidget(m_metaDataLabels[key], i, j);
+            metaDataLayout->addWidget(m_metaDataFields[key], i, j+1);
+            key++;
+        }
+    }
+
     // ### replace by a monitoring outputs once we have them
 //    m_videoProbe = new QVideoProbe(this);
 //    connect(m_videoProbe, &QVideoProbe::videoFrameProbed, m_videoHistogram, &HistogramWidget::processFrame);
@@ -179,6 +199,8 @@ Player::Player(QWidget *parent)
     layout->addLayout(hLayout);
     layout->addLayout(controlLayout);
     layout->addLayout(histogramLayout);
+    layout->addWidget(metaDataLabel);
+    layout->addLayout(metaDataLayout);
 #if defined(Q_OS_QNX)
     // On QNX, the main window doesn't have a title bar (or any other decorations).
     // Create a status bar for the status information instead.
@@ -269,9 +291,33 @@ void Player::metaDataChanged()
             .arg(metaData.value(QMediaMetaData::AlbumArtist).toString())
             .arg(metaData.value(QMediaMetaData::Title).toString()));
 
-    if (m_coverLabel) {
-        QImage cover = metaData.value(QMediaMetaData::CoverArtImage).value<QImage>();
-        m_coverLabel->setPixmap(QPixmap::fromImage(cover));
+    for (int i = 0; i < QMediaMetaData::NumMetaData; i++) {
+        if (QLineEdit* field = qobject_cast<QLineEdit*>(m_metaDataFields[i]))
+            field->clear();
+        else if (QLabel* label = qobject_cast<QLabel*>(m_metaDataFields[i]))
+            label->clear();
+        m_metaDataFields[i]->setDisabled(true);
+        m_metaDataLabels[i]->setDisabled(true);
+    }
+
+    for (auto &key : metaData.keys()) {
+        int i = int(key);
+        if (key == QMediaMetaData::CoverArtImage) {
+            if (QLabel *cover = qobject_cast<QLabel*>(m_metaDataFields[key])) {
+                QImage coverImage = metaData.value(QMediaMetaData::CoverArtImage).value<QImage>();
+                cover->setPixmap(QPixmap::fromImage(coverImage));
+            }
+        }
+        else if (key == QMediaMetaData::ThumbnailImage) {
+            if (QLabel *thumbnail = qobject_cast<QLabel*>(m_metaDataFields[key])) {
+                QImage thumbnailImage = metaData.value(QMediaMetaData::CoverArtImage).value<QImage>();
+                thumbnail->setPixmap(QPixmap::fromImage(thumbnailImage));
+            }
+        }
+        else if (QLineEdit *field = qobject_cast<QLineEdit*>(m_metaDataFields[key]))
+            field->setText(QString("%1").arg(metaData.value(key).toString()));
+        m_metaDataFields[i]->setDisabled(false);
+        m_metaDataLabels[i]->setDisabled(false);
     }
 }
 
@@ -487,3 +533,4 @@ void Player::clearHistogram()
     QMetaObject::invokeMethod(m_videoHistogram, "processFrame", Qt::QueuedConnection, Q_ARG(QVideoFrame, QVideoFrame()));
     QMetaObject::invokeMethod(m_audioHistogram, "processBuffer", Qt::QueuedConnection, Q_ARG(QAudioBuffer, QAudioBuffer()));
 }
+
diff --git a/examples/multimediawidgets/player/player.h b/examples/multimediawidgets/player/player.h
index d95ad6191..3944d0f3f 100644
--- a/examples/multimediawidgets/player/player.h
+++ b/examples/multimediawidgets/player/player.h
@@ -54,6 +54,7 @@
 #include <QWidget>
 #include <QMediaPlayer>
 #include <QMediaPlaylist>
+#include <QMediaMetaData>
 
 QT_BEGIN_NAMESPACE
 class QAbstractItemView;
@@ -119,7 +120,6 @@ private:
     QMediaPlayer *m_player = nullptr;
     QMediaPlaylist *m_playlist = nullptr;
     QVideoWidget *m_videoWidget = nullptr;
-    QLabel *m_coverLabel = nullptr;
     QSlider *m_slider = nullptr;
     QLabel *m_labelDuration = nullptr;
     QPushButton *m_fullScreenButton = nullptr;
@@ -138,6 +138,9 @@ private:
     QString m_trackInfo;
     QString m_statusInfo;
     qint64 m_duration;
+
+    QWidget *m_metaDataFields[QMediaMetaData::NumMetaData] = {};
+    QLabel *m_metaDataLabels[QMediaMetaData::NumMetaData] = {};
 };
 
 #endif // PLAYER_H
diff --git a/src/multimedia/qmediametadata.cpp b/src/multimedia/qmediametadata.cpp
index 5ab262357..11002d96f 100644
--- a/src/multimedia/qmediametadata.cpp
+++ b/src/multimedia/qmediametadata.cpp
@@ -39,6 +39,7 @@
 
 #include "qmediametadata.h"
 #include <qvariant.h>
+#include <qobject.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -232,5 +233,65 @@ void QMediaMetaData::insert(QMediaMetaData::Key k, const QVariant &value)
     data.insert(k, value);
 }
 
+QString QMediaMetaData::metaDataKeyToString(QMediaMetaData::Key k)
+{
+    switch (k) {
+        case QMediaMetaData::Title:
+            return (QObject::tr("Title"));
+        case QMediaMetaData::Author:
+            return (QObject::tr("Author"));
+        case QMediaMetaData::Comment:
+            return (QObject::tr("Comment"));
+        case QMediaMetaData::Description:
+            return (QObject::tr("Description"));
+        case QMediaMetaData::Genre:
+            return (QObject::tr("Genre"));
+        case QMediaMetaData::Year:
+            return (QObject::tr("Year"));
+        case QMediaMetaData::Date:
+            return (QObject::tr("Date"));
+        case QMediaMetaData::Language:
+            return (QObject::tr("Language"));
+        case QMediaMetaData::Publisher:
+            return (QObject::tr("Publisher"));
+        case QMediaMetaData::Copyright:
+            return (QObject::tr("Copyright"));
+        case QMediaMetaData::Url:
+            return (QObject::tr("Url"));
+        case QMediaMetaData::Duration:
+            return (QObject::tr("Duration"));
+        case QMediaMetaData::MediaType:
+            return (QObject::tr("Media type"));
+        case QMediaMetaData::AudioBitRate:
+            return (QObject::tr("Audio bit rate"));
+        case QMediaMetaData::AudioCodec:
+            return (QObject::tr("Audio codec"));
+        case QMediaMetaData::VideoBitRate:
+            return (QObject::tr("Video bit rate"));
+        case QMediaMetaData::VideoCodec:
+            return (QObject::tr("Video codec"));
+        case QMediaMetaData::AlbumTitle:
+            return (QObject::tr("Album title"));
+        case QMediaMetaData::AlbumArtist:
+            return (QObject::tr("Album artist"));
+        case QMediaMetaData::ContributingArtist:
+            return (QObject::tr("Contributing artist"));
+        case QMediaMetaData::TrackNumber:
+            return (QObject::tr("Track number"));
+        case QMediaMetaData::Composer:
+            return (QObject::tr("Composer"));
+        case QMediaMetaData::ThumbnailImage:
+            return (QObject::tr("Thumbnail image"));
+        case QMediaMetaData::CoverArtImage:
+            return (QObject::tr("Cover art image"));
+        case QMediaMetaData::Orientation:
+            return (QObject::tr("Orientation"));
+        case QMediaMetaData::Resolution:
+            return (QObject::tr("Resolution"));
+        case QMediaMetaData::LeadPerformer:
+            return (QObject::tr("Lead performer"));
+    }
+}
+
 
 QT_END_NAMESPACE
diff --git a/src/multimedia/qmediametadata.h b/src/multimedia/qmediametadata.h
index 0bf43309b..3e552aba8 100644
--- a/src/multimedia/qmediametadata.h
+++ b/src/multimedia/qmediametadata.h
@@ -89,6 +89,8 @@ public:
         LeadPerformer,
     };
 
+    static const int NumMetaData = 27;
+
 //    QMetaType typeForKey(Key k);
     QVariant value(Key k) const;
     void insert(Key k, const QVariant &value);
@@ -100,6 +102,8 @@ public:
 
     bool isEmpty() const { return data.isEmpty(); }
 
+    static QString metaDataKeyToString(Key k);
+
 protected:
     friend bool operator==(const QMediaMetaData &a, const QMediaMetaData &b)
     { return a.data == b.data; }