segafilm: fix leaks if reading the header fails

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC:libav-stable@libav.org
(cherry picked from commit 6892d145a0c80249bd61ee7dd31ec851c5076bcd)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
mov: Free intermediate arrays in the normal cleanup function

These arrays are normally freed at the end of mov_read_trak,
but make sure they're freed in case mov_read_trak returned
early (due to errors) or in case the atoms that allocate arrays
are encountered at some other point than within a trak (which
we don't have checks against).

Sample-Id: 00000496-google
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit d51f09962d5b4bc999fb70c040f330dd1873212e)
Signed-off-by: Reinhard Tartler <siretart@tauware.de>
mov: Free an earlier allocated array if allocating a new one

It could probably also be considered an error if the pointer isn't
null at this point, but then we might risk rejecting some
slightly broken files that we might have handled so far.

Sample-Id: 00000496-google
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 2620df13104ddaa136158eb6bb1195adbf9d7692)
Signed-off-by: Reinhard Tartler <siretart@tauware.de>
h264: check that an IDR NAL only contains I slices

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC:libav-stable@libav.org
(cherry picked from commit 8b2e5e42bb9d6a59ede5af2e6df4aaf7750d1195)
Signed-off-by: Reinhard Tartler <siretart@tauware.de>
h264: reset num_reorder_frames if it is invalid

An invalid VUI is not considered a fatal error, so the SPS containing it
may still be used. Leaving an invalid value of num_reorder_frames there
can result in writing over the bounds of H264Context.delayed_pic.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC:libav-stable@libav.org
(cherry picked from commit 9ecabd7892ff073ae60ded3fc0a1290f5914ed5c)
Signed-off-by: Reinhard Tartler <siretart@tauware.de>

Conflicts:
	libavcodec/h264_ps.c
vc1: Always reset numref when parsing a new frame header.

Fixes an issue where the B-frame coding mode switches from interlaced
fields to interlaced frames, causing incorrect decisions in the motion
compensation code and resulting in visual artifacts.

CC: libav-stable@libav.org
Signed-off-by: Tim Walker <tdskywalker@gmail.com>
(cherry picked from commit dd2d0039b6405dc724e4fef0d5b8f49530eea3aa)
Signed-off-by: Reinhard Tartler <siretart@tauware.de>
mathematics: remove asserts from av_rescale_rnd()

It is a public function, it must not assert on its parameters.

(cherry picked from commit 94a417acc05cc5151b473abc0bf51fad26f8c5a0)
Signed-off-by: Reinhard Tartler <siretart@tauware.de>
oggparseogm: check timing variables

Fixes a potential divide by zero.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC:libav-stable@libav.org
(cherry picked from commit 75647dea6f7db79b409bad66a119f5c73da730f3)
Signed-off-by: Reinhard Tartler <siretart@tauware.de>