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 <[email protected]>
Signed-off-by: Andreas Cadhalpun <[email protected]>
(cherry picked from commit ecf63b7cc24b9fd3e6d604313325dd1ada4db662)
Signed-off-by: Andreas Cadhalpun <[email protected]>

0 files changed, 0 insertions, 0 deletions