install go2rtc on bob

installs_on_host/go2rtc/pkg/h265/avc.go

@@ -0,0 +1,54 @@
+package h265
+
+import "github.com/AlexxIT/go2rtc/pkg/h264"
+
+const forbiddenZeroBit = 0x80
+const nalUnitType = 0x3F
+
+// Deprecated: DecodeStream - find and return first AU in AVC format
+// useful for processing live streams with unknown separator size
+func DecodeStream(annexb []byte) ([]byte, int) {
+	startPos := -1
+
+	i := 0
+	for {
+		// search next separator
+		if i = h264.IndexFrom(annexb, []byte{0, 0, 1}, i); i < 0 {
+			break
+		}
+
+		// move i to next AU
+		if i += 3; i >= len(annexb) {
+			break
+		}
+
+		// check if AU type valid
+		octet := annexb[i]
+		if octet&forbiddenZeroBit != 0 {
+			continue
+		}
+
+		nalType := (octet >> 1) & nalUnitType
+		if startPos >= 0 {
+			switch nalType {
+			case NALUTypeVPS, NALUTypePFrame:
+				if annexb[i-4] == 0 {
+					return h264.DecodeAnnexB(annexb[startPos : i-4]), i - 4
+				} else {
+					return h264.DecodeAnnexB(annexb[startPos : i-3]), i - 3
+				}
+			}
+		} else {
+			switch nalType {
+			case NALUTypeVPS, NALUTypePFrame:
+				if i >= 4 && annexb[i-4] == 0 {
+					startPos = i - 4
+				} else {
+					startPos = i - 3
+				}
+			}
+		}
+	}
+
+	return nil, 0
+}