From 3f177e6b682404e17e4bce8d4ef16046fde82ad5 Mon Sep 17 00:00:00 2001
From: q191201771 <191201771@qq.com>
Date: Sat, 5 Mar 2022 17:25:50 +0800
Subject: [PATCH] [feat] avc: new func Avcc2Annexb

---
 pkg/avc/avc.go | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pkg/avc/avc.go b/pkg/avc/avc.go
index eadab0b..7846d14 100644
--- a/pkg/avc/avc.go
+++ b/pkg/avc/avc.go
@@ -441,7 +441,6 @@ func SplitNaluAvcc(nals []byte) (nalList [][]byte, err error) {
 		nalList = append(nalList, nal)
 	})
 	return
-
 }
 
 func IterateNaluAnnexb(nals []byte, handler func(nal []byte)) error {
@@ -517,4 +516,14 @@ func IterateNaluAvcc(nals []byte, handler func(nal []byte)) error {
 	}
 }
 
+func Avcc2Annexb(nals []byte) ([]byte, error) {
+	ret := make([]byte, len(nals))
+	ret = ret[0:0]
+	err := IterateNaluAvcc(nals, func(nal []byte) {
+		ret = append(ret, NaluStartCode4...)
+		ret = append(ret, nal...)
+	})
+	return ret, err
+}
+
 // TODO(chef): 是否需要 func NaluAvcc2Annexb, func NaluAnnexb2Avcc