mts: some more const naming improvements

stream/mts/encoder.go

@@ -37,8 +37,7 @@ import (
 )
 
 const (
-	psiPacketSize = 184
-	psiSendCount  = 7
+	psiSndCnt = 7
 )
 
 type MetaData struct {
@@ -209,14 +208,14 @@ func (e *Encoder) writePSI() error {
 	if err != nil {
 		return err
 	}
-	e.psiCount = psiSendCount
+	e.psiCount = psiSndCnt
 	return nil
 }
 
 // addPadding adds an appropriate amount of padding to a pat or pmt table for
 // addition to an mpegts packet
 func addPadding(d []byte) []byte {
-	for len(d) < psiPacketSize {
+	for len(d) < psi.PktLen {
 		d = append(d, 0xff)
 	}
 	return d

stream/mts/psi/psi.go

@@ -30,6 +30,11 @@ import (
 	"hash/crc32"
 )
 
+// Misc consts
+const (
+	PktLen = 184
+)
+
 // Lengths of section definitions
 const (
 	ESSDDefLen = 5