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#pragma once
#include <QDateTime>
#include <QImage>
#include <utility>
#include "track/trackmetadata.h"
#include "util/memory.h"
namespace mixxx {
// API and abstract base class for parsing track metadata and
// cover art.
//
// The time stamp returned from the source when importing/exporting
// metadata reflects the current version of the metadata at the source
// and can be used for synchronization purposes.
class MetadataSource {
public:
virtual ~MetadataSource() = default;
enum class ImportResult {
Succeeded,
Failed,
Unavailable,
};
// Read both track metadata and cover art at once, because this
// is the most common use case. Both pointers are output parameters
// and might be passed a nullptr if their result is not needed.
// If no metadata is available for a track then the source should
// return Unavailable as this default implementation does.
virtual std::pair<ImportResult, QDateTime> importTrackMetadataAndCoverImage(
TrackMetadata* /*pTrackMetadata*/,
QImage* /*pCoverImage*/) const {
return std::make_pair(ImportResult::Unavailable, QDateTime());
}
enum class ExportResult {
Succeeded,
Failed,
Unsupported,
};
// Update track metadata of the source.
// Sources that are read-only and don't support updating of metadata
// should return Unsupported as this default implementation does.
virtual std::pair<ExportResult, QDateTime> exportTrackMetadata(
const TrackMetadata& /*trackMetadata*/) const {
return std::make_pair(ExportResult::Unsupported, QDateTime());
}
};
typedef std::shared_ptr<MetadataSource> MetadataSourcePointer;
} // namespace mixxx
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