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avcodec/avcodec, avpacket: Return blank packet on av_packet_ref() failure

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Up until now, it was completely unspecified what the content of the
destination packet dst was on error. Depending upon where the error
happened calling av_packet_unref() on dst might be dangerous.

This commit changes this by making sure that dst is blank on error, so
unreferencing it again is safe (and still pointless). This behaviour is
documented.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt
2020-03-27 01:56:38 +01:00
parent e621f2b6cd
commit c52ec0367d
4 changed files with 11 additions and 5 deletions
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doc/APIchanges
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@@ -15,6 +15,10 @@ libavutil: 2017-10-21
API changes, most recent first:
2020-03-27 - xxxxxxxxxx - lavc 58.77.100 - avcodec.h
av_packet_ref() now guarantees to return the destination packet
in a blank state on error.
2020-03-10 - xxxxxxxxxx - lavc 58.75.100 - avcodec.h
Add AV_PKT_DATA_ICC_PROFILE.