avcodec/vmdvideo: Check len before using it in method 3

Fixes out of array access
Fixes: asan_heap-oob_4d23ba_91_cov_3853393937_128.vmd

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/xface: correct the XFACE_MAX_* values

Fixes out of array access

Fixes: asan_stack-oob_32c12e5_2536_cov_2442316831_lena.xface
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/xface: Add asserts to limit nb_words from becoming too large

Approved-by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
doc/filters: fix typos and spelling errors

Prompted-by: Carl Oxwall <@oxwall>
Signed-off-by: Lou Logan <lou@lrcd.com>
avcodec/utvideodec: Fix handling of slice_height=0

Fixes out of array accesses
Fixes: asan_heap-oob_25bcd7e_3783_cov_3553517262_utvideo_rgba_median.avi
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/mov: check atom nesting depth

Fixes call stack overflow
Fixes: case1_call_stack_overflow.mp4
Found-by: Michal Zalewski <lcamtuf@coredump.cx>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/mov: fix integer overflow of size

Fixes: case1_call_stack_overflow.mp4
Found-by: Michal Zalewski <lcamtuf@coredump.cx>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
swscale: increase yuv2rgb table headroom

Fixes out of array access
Fixes: case2_bad_read_yuv2rgbx32.mp4
Found-by: Michal Zalewski <lcamtuf@coredump.cx>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/h264: make the first field of H264Context an AVClass

Fixes use of freed memory
Fixes: asan_heap-uaf_3660f67_757_cov_1257014655_Hi422FR1_SONY_A.jsv
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
libavutil: cosmetic: inserted spaces wherever necessary

Signed-off-by: Supraja Meedinti <supraja0493@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
flacenc: calculate lower sum levels in-place.

Should improve cache usage and reduces stack usage.
Also reduces number of copies in case many levels
have the same number of bits.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
avcodec/indeo3: use signed variables to avoid underflow

Fixes out of array read
Fixes: signal_sigsegv_1b0a4da_1865_cov_2167818389_computer_anger.avi
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/utils: check the private context class

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/imc: dont read bits beyond the end

Fixes use of uninitialized memory

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
dashenc: Write segment timelines properly if the timeline has gaps

Write a new start time if the duration of the previous segment
didn't match the start of the next one. Check that segments
actually are continuous before writing a repeat count.

This makes sure timestamps deduced from the timeline actually
match the real start timestamp as written in filenames (if
using a template containing $Time$).

Signed-off-by: Martin Storsjö <martin@martin.st>
dashenc: Adjust the start time of a segment to the end of the previous segment

This is the same adjustment that the mp4 muxer does to the start
timestamp of fragments, since the timestamp of a sample in an mp4
file is implicit from the sum of earlier sample durations.

This avoids gaps in the timeline (which can stop dash.js from
playing it back), and makes sure the timestamp on the segmenter
level matches what the mp4 muxer actually writes into the segments.

This is only an issue if the AVPacket duration of the last
packet of a segment doesn't point to the actual start timestamp
of the next packet (the first in the next segment).

Signed-off-by: Martin Storsjö <martin@martin.st>
Merge commit '2f628d5943c12389c07d652d23d3916997f9f0f6'

* commit '2f628d5943c12389c07d652d23d3916997f9f0f6':
  dashenc: Write segment timelines properly if the timeline has gaps

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '456e93bfdd4cbc5e995dea415019abd0703d0e16'

* commit '456e93bfdd4cbc5e995dea415019abd0703d0e16':
  dashenc: Adjust the start time of a segment to the end of the previous segment

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/dcadec: Check that the added xch channel isnt already there

Fixes null pointer dereference
Fixes: signal_sigsegv_369609d_623_cov_2008234281_ES_6.1_16bit.dts
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/hevc: clear filter_slice_edges() on allocation

This avoids use of uninitialized memory
Fixes: asan_static-oob_17aa046_582_cov_212287884_DBLK_G_VIXS_1.bit
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>