.upc metadata

backend/metadata.go

@@ -36,6 +36,7 @@ type Metadata struct {
 	Lyrics      string
 	Description string
 	ISRC        string
+	UPC         string
 	Genre       string
 }
 
@@ -167,6 +168,9 @@ func EmbedMetadata(filepath string, metadata Metadata, coverPath string) error {
 	if metadata.ISRC != "" {
 		_ = cmt.Add("ISRC", metadata.ISRC)
 	}
+	if metadata.UPC != "" {
+		_ = cmt.Add(preferredUPCTagKey, metadata.UPC)
+	}
 
 	if genreValues := SplitMetadataValues(metadata.Genre, separator); len(genreValues) > 0 {
 		addVorbisTagValues(cmt, "GENRE", genreValues)
@@ -980,6 +984,8 @@ func ExtractFullMetadataFromFile(filePath string) (Metadata, error) {
 			metadata.Genre = value
 		case "url":
 			metadata.URL = value
+		case "isrc", "tsrc":
+			metadata.ISRC = value
 		case "comment", "comments":
 			if metadata.Comment == "" {
 				metadata.Comment = value
@@ -991,6 +997,8 @@ func ExtractFullMetadataFromFile(filePath string) (Metadata, error) {
 		}
 	}
 
+	metadata.UPC = firstPreferredFFprobeUPCValue(allTags)
+
 	return metadata, nil
 }
 
@@ -1082,6 +1090,13 @@ func embedMetadataToMP3(filePath string, metadata Metadata, coverPath string) er
 	if metadata.ISRC != "" {
 		addMP3TextFrame(tag, "TSRC", metadata.ISRC)
 	}
+	if metadata.UPC != "" {
+		tag.AddUserDefinedTextFrame(id3v2.UserDefinedTextFrame{
+			Encoding:    id3v2.EncodingUTF8,
+			Description: "UPC",
+			Value:       metadata.UPC,
+		})
+	}
 
 	if comment := resolveMetadataComment(metadata); comment != "" {
 		tag.DeleteFrames(tag.CommonID("Comments"))
@@ -1201,6 +1216,9 @@ func embedMetadataToM4A(filePath string, metadata Metadata, coverPath string) er
 	if metadata.ISRC != "" {
 		args = append(args, "-metadata", "isrc="+metadata.ISRC)
 	}
+	if metadata.UPC != "" {
+		args = append(args, "-metadata", "upc="+metadata.UPC)
+	}
 	genreText := joinMultiValueText(SplitMetadataValues(metadata.Genre, separator), separator, false)
 	if genreText == "" {
 		genreText = strings.TrimSpace(metadata.Genre)