h264: remove AntiCompetitionAdd

pkg/h264/anticompetition.go

@@ -1,43 +1,5 @@
 package h264
 
-// AntiCompetitionAdd adds the anti-competition bytes to a NALU.
-func AntiCompetitionAdd(nalu []byte) []byte {
-	var ret []byte
-	step := 0
-	start := 0
-
-	for i, b := range nalu {
-		switch step {
-		case 0:
-			if b == 0 {
-				step++
-			}
-
-		case 1:
-			if b == 0 {
-				step++
-			} else {
-				step = 0
-			}
-
-		case 2:
-			switch b {
-			case 3, 2, 1, 0:
-				ret = append(ret, nalu[start:i-2]...)
-				ret = append(ret, []byte{0x00, 0x00, 0x03, b}...)
-				step = 0
-				start = i + 1
-
-			default:
-				step = 0
-			}
-		}
-	}
-
-	ret = append(ret, nalu[start:]...)
-	return ret
-}
-
 // AntiCompetitionRemove removes the anti-competition bytes from a NALU.
 func AntiCompetitionRemove(nalu []byte) []byte {
 	// 0x00 0x00 0x03 0x00 -> 0x00 0x00 0x00

pkg/h264/anticompetition_test.go

@@ -6,39 +6,28 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-var casesAntiCompetition = []struct {
-	name   string
-	unproc []byte
-	proc   []byte
-}{
-	{
-		"base",
-		[]byte{
-			0x00, 0x00, 0x00,
-			0x00, 0x00, 0x01,
-			0x00, 0x00, 0x02,
-			0x00, 0x00, 0x03,
-		},
-		[]byte{
-			0x00, 0x00, 0x03, 0x00,
-			0x00, 0x00, 0x03, 0x01,
-			0x00, 0x00, 0x03, 0x02,
-			0x00, 0x00, 0x03, 0x03,
-		},
-	},
-}
-
-func TestAntiCompetitionAdd(t *testing.T) {
-	for _, ca := range casesAntiCompetition {
-		t.Run(ca.name, func(t *testing.T) {
-			proc := AntiCompetitionAdd(ca.unproc)
-			require.Equal(t, ca.proc, proc)
-		})
-	}
-}
-
 func TestAntiCompetitionRemove(t *testing.T) {
-	for _, ca := range casesAntiCompetition {
+	for _, ca := range []struct {
+		name   string
+		unproc []byte
+		proc   []byte
+	}{
+		{
+			"base",
+			[]byte{
+				0x00, 0x00, 0x00,
+				0x00, 0x00, 0x01,
+				0x00, 0x00, 0x02,
+				0x00, 0x00, 0x03,
+			},
+			[]byte{
+				0x00, 0x00, 0x03, 0x00,
+				0x00, 0x00, 0x03, 0x01,
+				0x00, 0x00, 0x03, 0x02,
+				0x00, 0x00, 0x03, 0x03,
+			},
+		},
+	} {
 		t.Run(ca.name, func(t *testing.T) {
 			unproc := AntiCompetitionRemove(ca.proc)
 			require.Equal(t, ca.unproc, unproc)