Caption support (#2462)

Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

vendor/github.com/asticode/go-astits/data_tot.go

@@ -0,0 +1,35 @@
+package astits
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/asticode/go-astikit"
+)
+
+// TOTData represents a TOT data
+// Page: 39 | Chapter: 5.2.6 | Link: https://www.dvb.org/resources/public/standards/a38_dvb-si_specification.pdf
+// (barbashov) the link above can be broken, alternative: https://dvb.org/wp-content/uploads/2019/12/a038_tm1217r37_en300468v1_17_1_-_rev-134_-_si_specification.pdf
+type TOTData struct {
+	Descriptors []*Descriptor
+	UTCTime     time.Time
+}
+
+// parseTOTSection parses a TOT section
+func parseTOTSection(i *astikit.BytesIterator) (d *TOTData, err error) {
+	// Create data
+	d = &TOTData{}
+
+	// UTC time
+	if d.UTCTime, err = parseDVBTime(i); err != nil {
+		err = fmt.Errorf("astits: parsing DVB time failed: %w", err)
+		return
+	}
+
+	// Descriptors
+	if d.Descriptors, err = parseDescriptors(i); err != nil {
+		err = fmt.Errorf("astits: parsing descriptors failed: %w", err)
+		return
+	}
+	return
+}