streaming

commit 7df33c66e9115e28fc1f2a8f5de235128e6be934
parent f8b93b8eb11ea50ba94dee757fd4ae066ded24d7
Author: Oliver Lowe <o@olowe.co>
Date:   Mon, 13 May 2024 14:32:06 +1000

internal/scte35: implement encoding of splice insert commands

Diffstat:
M
internal/scte35/break_duration.go
 | 
3
++-
M
internal/scte35/break_duration_test.go
 | 
2
+-
M
internal/scte35/command.go
 | 
3
++-
M
internal/scte35/splice_info_test.go
 | 
22
----------------------

4 files changed, 5 insertions(+), 25 deletions(-)
diff --git a/internal/scte35/break_duration.go b/internal/scte35/break_duration.go
@@ -15,7 +15,8 @@ func packBreakDuration(b *BreakDuration) [5]byte {
 	if b.AutoReturn {
 		p[0] |= (1 << 7)
 	}
-	// next 6 bits are reserved.
+	// toggle 6 reserved bits
+	p[0] |= 0b01111110
 	pts := toPTS(b.Duration)
 	// 1 bit remaining in the first byte, so pack 1 bit from the timestamp
 	p[0] |= pts[0]
diff --git a/internal/scte35/break_duration_test.go b/internal/scte35/break_duration_test.go
@@ -8,7 +8,7 @@ func TestPackBreakDuration(t *testing.T) {
 	dur := uint64(8589934492) // 2^33 - 100
 	bd := BreakDuration{true, dur}
 	want := [5]byte{
-		0b10000001,
+		0b11111111,
 		0b11111111,
 		0b11111111,
 		0b11111111,
diff --git a/internal/scte35/command.go b/internal/scte35/command.go
@@ -209,7 +209,8 @@ func encodeInsert(ins *Insert) []byte {
 		if ins.EventIDCompliance {
 			buf[5] |= (1 << 3)
 		}
-		// next 3 bits are reserved.
+		// toggle remaining 3 reserved bits.
+		buf[5] |= 0x07
 
 		if ins.SpliceTime != nil && !ins.Immediate {
 			b := encodeSpliceTime(*ins.SpliceTime)
diff --git a/internal/scte35/splice_info_test.go b/internal/scte35/splice_info_test.go
@@ -128,25 +128,3 @@ func TestEncodeSpliceInfo(t *testing.T) {
 		})
 	}
 }
-
-func TestEncodeInsert(t *testing.T) {
-	// want := 0x4800008f7feffe7369c02efe
-	ins := samples[1].want.Command.Insert
-	b := encodeInsert(ins)
-	want := []byte{
-		0x48,
-		0x00,
-		0x00,
-		0x8f,
-		0x7f,
-		0xef,
-		0xfe,
-		0x73,
-		0x69,
-		0xc0,
-		0x2e,
-		0xfe,
-	}
-	fmt.Printf("%#x\n", want)
-	fmt.Printf("%#x\n", b)
-}