From ed61f1d932c5c6d38458fcd2e1d5d154383f017e Mon Sep 17 00:00:00 2001
From: Tasuku Suzuki <tasuku.suzuki@qt.io>
Date: Mon, 12 Dec 2016 16:32:47 +0900
Subject: [PATCH] metadata image support with the "data" URL scheme for QtQuick

add posterImage, coverArtImage and thumbnailImage to metadata

Change-Id: I10b9bae10c219ffa41506d6e6b345020790217a6
---
 .../multimedia/qdeclarativemediametadata_p.h       | 33 ++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/src/imports/multimedia/qdeclarativemediametadata_p.h b/src/imports/multimedia/qdeclarativemediametadata_p.h
index ede7f87..6a6a815 100644
--- a/src/imports/multimedia/qdeclarativemediametadata_p.h
+++ b/src/imports/multimedia/qdeclarativemediametadata_p.h
@@ -51,6 +51,9 @@
 // We mean it.
 //
 
+#include <QtCore/QBuffer>
+#include <QtGui/QImage>
+#include <QtGui/QImageWriter>
 #include <QtQml/qqml.h>
 #include <QtMultimedia/qmediametadata.h>
 #include <QtMultimedia/qmediaservice.h>
@@ -153,6 +156,9 @@ class QDeclarativeMediaMetaData : public QObject
     Q_PROPERTY(QVariant gpsProcessingMethod READ gpsProcessingMethod WRITE setGPSProcessingMethod NOTIFY metaDataChanged)
     Q_PROPERTY(QVariant gpsAreaInformation READ gpsAreaInformation WRITE setGPSAreaInformation NOTIFY metaDataChanged)
 
+    Q_PROPERTY(QVariant posterImage READ posterImage NOTIFY metaDataChanged)
+    Q_PROPERTY(QVariant coverArtImage READ coverArtImage NOTIFY metaDataChanged)
+    Q_PROPERTY(QVariant thumbnailImage READ thumbnailImage NOTIFY metaDataChanged)
 public:
     QDeclarativeMediaMetaData(QMediaObject *player, QObject *parent = 0)
         : QObject(parent)
@@ -425,6 +431,16 @@ QT_WARNING_POP
     void setGPSAreaInformation(const QVariant &information) {
         setMetaData(QMediaMetaData::GPSAreaInformation, information); }
 
+    QVariant posterImage() const {
+        return convertImageToUrl(m_mediaObject->metaData(QMediaMetaData::PosterImage));
+    }
+    QVariant coverArtImage() const {
+        return convertImageToUrl(m_mediaObject->metaData(QMediaMetaData::CoverArtImage));
+    }
+    QVariant thumbnailImage() const {
+        return convertImageToUrl(m_mediaObject->metaData(QMediaMetaData::ThumbnailImage));
+    }
+
 Q_SIGNALS:
     void metaDataChanged();
 
@@ -440,6 +456,23 @@ private:
             m_writerControl->setMetaData(key, value);
     }
 
+    QUrl convertImageToUrl(const QVariant &variant) const
+    {
+        if (variant.type() != QVariant::Image)
+            return QUrl();
+
+        QImage image = variant.value<QImage>();
+        QByteArray data;
+        QBuffer buffer(&data);
+        buffer.open(QBuffer::WriteOnly);
+        QImageWriter png(&buffer, "png");
+        if (!png.write(image)) {
+            return QUrl();
+        }
+        buffer.close();
+        return QUrl(QStringLiteral("data:image/png;base64,") + data.toBase64());
+    }
+
     QMediaObject *m_mediaObject;
     QMetaDataWriterControl *m_writerControl;
     bool m_requestedWriterControl;
-- 
2.7.4