Add CDDB1 calculation

server.go

@@ -89,11 +89,11 @@ type discEntry struct {
 	Tracks     []trackEntry `json:"tracks"`
 }
 type trackEntry struct {
-	Duration      int           `json:"duration,omitempty"`
-	MainTitle     string        `json:"title,omitempty"`
-	OriginalTitle string        `json:"originaltitle,omitempty"`
-	Titles        []string      `json:"titles,omitempty"`
-	Artists       []artistEntry `json:"artists,omitempty"`
+	Duration  int           `json:"duration,omitempty"`
+	MainTitle string        `json:"title,omitempty"`
+	Original  string        `json:"original,omitempty"`
+	Titles    []string      `json:"titles,omitempty"`
+	Artists   []artistEntry `json:"artists,omitempty"`
 }
 type artistEntry struct {
 	Position string   `json:"position"`
@@ -477,7 +477,7 @@ func processIndexDirectory(filePath, indexPath, kind string, wg *sync.WaitGroup)
 															}
 															switch keyEntry {
 															case "original title":
-																track.OriginalTitle = strings.TrimSpace(strings.Join(getStringValue(entry.MainTitle, values), " "))
+																track.Original = strings.TrimSpace(strings.Join(getStringValue(entry.MainTitle, values), " "))
 															case "lyrics", "vocals", "arranger", "composer", "producer":
 																track.Artists = append(track.Artists, getArtistEntries(keyEntry, values)...)
 															case "arrangement":
@@ -644,6 +644,10 @@ func main() {
 						return
 					}
 					switch splits[1] {
+					case "hello":
+						writer.Write([]byte("200 hello and welcome\n.\n"))
+						return
+
 					case "query":
 						formatEntry := func(cddb1 utilities.CDDB1, result findByDurationResult) (out string) {
 							var group string
@@ -666,6 +670,8 @@ func main() {
 						}
 
 						cddb1 := utilities.NewCDDB1FromString(splits[2])
+
+						//cddb1_calc := utilities.GetCDDB1FromTOC(splits[3:])
 						if cddb1 == 0 {
 							writer.Write([]byte("500 Command syntax error\n.\n"))
 							return

utilities/cddb1.go

@@ -3,6 +3,7 @@ package utilities
 import (
 	"encoding/binary"
 	"encoding/hex"
+	"strconv"
 	"time"
 )
 
@@ -33,3 +34,28 @@ func (c CDDB1) String() string {
 	binary.BigEndian.PutUint32(b, uint32(c))
 	return hex.EncodeToString(b)
 }
+
+func GetCDDB1FromTOC(toc []string) CDDB1 {
+	if len(toc) < 3 {
+		return 0
+	}
+	var t []int
+	for _, i := range toc[1 : len(toc)-1] {
+		item, err := strconv.Atoi(i)
+		if err == nil {
+			t = append(t, item)
+		}
+	}
+
+	length := uint32(((time.Second * time.Duration(t[0]-t[1])) / 75).Seconds())
+	checksum := uint32(0)
+	for i := 1; i < len(t); i++ {
+		n := uint32(t[i] / 75)
+		for n > 0 {
+			checksum += n % 10
+			n /= 10
+		}
+	}
+
+	return CDDB1(uint32((len(t)-1)&0xFF) | ((length & 0xFFFF) << 8) | ((checksum % 255) << 24))
+}