streaming

commit 632d4d1a3eefc7c7ce0d09802d97ab4ae402b9f7
parent bc2f72b74b9756e2953f53ec7044ee75709459bc
Author: Oliver Lowe <o@olowe.co>
Date:   Mon, 13 May 2024 15:45:54 +1000

internal/scte35: Set Splice.CWIndex for non-encrypted messages

All bits must be toggled when no encryption is used.

Diffstat:
M
internal/scte35/splice_info.go
 | 
14
+++++++-------

1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/internal/scte35/splice_info.go b/internal/scte35/splice_info.go
@@ -79,7 +79,12 @@ func encodeSpliceInfo(sis *SpliceInfo) ([]byte, error) {
 	buf = append(buf, b)
 	buf = append(buf, 0, 0, 0, 0)
 	putPTS(buf[4:], sis.PTSAdjustment)
-	buf = append(buf, sis.CWIndex)
+	if sis.Encrypted {
+		buf = append(buf, sis.CWIndex)
+	} else {
+		// unused; must toggle all bits.
+		buf = append(buf, 0xff)
+	}
 
 	if sis.Tier > maxTier {
 		return nil, fmt.Errorf("tier %d greater than max %d", sis.Tier, maxTier)
@@ -148,12 +153,7 @@ func decodeSpliceInfo(buf []byte) (*SpliceInfo, error) {
 	pts[3] = buf[4]
 	pts[4] = buf[5]
 	info.PTSAdjustment = binary.BigEndian.Uint64(pts)
-
-	if info.Encrypted {
-		info.CWIndex = uint8(buf[6])
-	} else {
-		info.CWIndex = 0xff
-	}
+	info.CWIndex = uint8(buf[6])
 
 	// want left-most 12 bits, remaining is used by command length.
 	// TODO(otl): still not getting expected values here;