ffm: reject invalid codec_id and codec_type
authorAndreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Mon, 14 Dec 2015 21:11:55 +0000 (22:11 +0100)
committerAndreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Tue, 15 Dec 2015 21:43:25 +0000 (22:43 +0100)
commitecf63b7cc24b9fd3e6d604313325dd1ada4db662
tree5ceebe73fc547a3a5ca38cb6488f3455df8d1fd9
parent09d84e00bd88f9ce191e1fe189c0a0ba8d70c826
ffm: reject invalid codec_id and codec_type

A negative codec_id cannot be handled by the found_decoder API of
AVStream->info: if the codec_id is not recognized, found_decoder is set
to -codec_id, which has to be '<0' according to the API documentation.

This can cause NULL pointer dereferencing in try_decode_frame.

Also make sure the codec_type matches the expected one for codec_id.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
libavformat/ffmdec.c