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avformat/avio: check input URLContext value NULL 

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Reviewed-by: Karthick Jeyapal <kjeyapal@akamai.com>
This commit is contained in:
Steven Liu 2017-12-28 12:07:22 +08:00
parent 658bdc6771
commit be4dfbf7b7
1 changed files with 6 additions and 4 deletions
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10
libavformat/avio.c
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@ -625,13 +625,15 @@ int64_t ffurl_size(URLContext *h)
int ffurl_get_file_handle(URLContext *h)
{
if (!h->prot->url_get_file_handle)
if (!h || !h->prot || !h->prot->url_get_file_handle)
return -1;
return h->prot->url_get_file_handle(h);
}
int ffurl_get_multi_file_handle(URLContext *h, int **handles, int *numhandles)
{
if (!h || !h->prot)
return AVERROR(ENOSYS);
if (!h->prot->url_get_multi_file_handle) {
if (!h->prot->url_get_file_handle)
return AVERROR(ENOSYS);
@ -647,15 +649,15 @@ int ffurl_get_multi_file_handle(URLContext *h, int **handles, int *numhandles)
int ffurl_get_short_seek(URLContext *h)
{
if (!h->prot->url_get_short_seek)
if (!h || !h->prot || !h->prot->url_get_short_seek)
return AVERROR(ENOSYS);
return h->prot->url_get_short_seek(h);
}
int ffurl_shutdown(URLContext *h, int flags)
{
if (!h->prot->url_shutdown)
return AVERROR(EINVAL);
if (!h || !h->prot || !h->prot->url_shutdown)
return AVERROR(ENOSYS);
return h->prot->url_shutdown(h, flags);
}