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avformat/allformats: Making av_register_all() thread-safe.

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When multiple threads tries to call av_register_all(), the first thread sets
initialized to 1 and do the register process. At the same time, other thread might
also call av_register_all(), which returns immediately because initialized is set to 1
(even when it has not completed registering codecs). We can avoid this problem
if we set initialised to 1 while exiting from function.

Github: Closes #196
(cherry picked from commit b092ee701f)

Conflicts:

	libavformat/allformats.c
This commit is contained in:
Vivekanand 2016-04-07 16:16:23 +05:30 committed by Michael Niedermayer
parent b62191f9c1
commit f3c1a76ffd
1 changed files with 2 additions and 1 deletions
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3
libavformat/allformats.c
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@ -54,7 +54,6 @@ void av_register_all(void)
if (initialized)
return;
initialized = 1;
avcodec_register_all();
@ -418,4 +417,6 @@ void av_register_all(void)
REGISTER_PROTOCOL(LIBRTMPTE, librtmpte);
REGISTER_PROTOCOL(LIBSSH, libssh);
REGISTER_PROTOCOL(LIBSMBCLIENT, libsmbclient);
initialized = 1;
}