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avformat/dashdec: check the root url length

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if the length of the root url is 0, unnecessary process the root_url

Signed-off-by: Steven Liu <lq@chinaffmpeg.org>
Signed-off-by: liuqi05 <liuqi05@kuaishou.com>
This commit is contained in:
Steven Liu 2020-08-17 20:30:18 +08:00 • committed by liuqi05
parent a424671e4f
commit 1ee52b2b6c
1 changed files with 1 additions and 1 deletions
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2
libavformat/dashdec.c
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@ -771,7 +771,7 @@ static int resolve_content_path(AVFormatContext *s, const char *url, int *max_ur
size = strlen(root_url);
isRootHttp = ishttp(root_url);
if (root_url[size - 1] != token) {
if (size > 0 && root_url[size - 1] != token) {
av_strlcat(root_url, "/", size + 2);
size += 2;
}