Currently, the decoder checks the 128th value of the 4th quant table during
while deriving the context on each sample, in order to speed itself up. This
is due to relying on the behavior of FFmpeg's FFV1 encoder, in which if that
value is zero, the entire 4th and 5th quant tables are assumed to be entirely
zero.

This does not match the FFV1 spec, which has no such restriction, and after
some discussion, it was decided to fix FFmpeg to abide by the spec, rather
than change the spec.

We will now check whether the 4th and 5th quant tables are zero properly,
by checking the 128th valye of both tables (which means they are zero due
to the way they're coded in the bitstream).

For further context, the FFV1 issue in question is located at:

    https://github.com/FFmpeg/FFV1/issues/169Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

Sources include various lists on the Internet, as well as the current
Wikipedia page at
https://en.wikipedia.org/w/index.php?title=List_of_ID3v1_Genres&oldid=896774343
but most importantly the list as used by taglib at
https://github.com/taglib/taglib/commit/3e60e339a4bc46e2a1a7aea782502480561a8acf#diff-f86455366624350770f41b4940925dde

Further patches to harmonize the spelling have been sent to taglib and
libid3tag. See also https://github.com/taglib/taglib/pull/942/Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes: Assertion failure
Fixes: 19753/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PGSSUB_fuzzer-5688461843759104

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegReviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

In the merge commit 878f8b0d, entry for replaygain_noclip
was placed in commands, which it is not, instead of among
the options.

Instead of dereferencing same thing again.

Prevents a run of consecutive duplicate frames from all being encoded
as keyframes, when force_key_frames is set to source.

The user-set forced KF times are parsed *after* this deleted
loop and rescaled right after parsing.

Also clarify behaviour in case of specified timestamps

This patch rewrites the innermost loop of ff_yuv2planeX_8_neon to avoid zips and
horizontal adds by using fused multiply adds. The patch also uses ld1r to load
one element and replicate it across all lanes of the vector. The patch also
improves the clipping code by removing the shift right instructions and
performing the shift with the shift-right narrow instructions.

I see 8% difference on an m6g instance with neoverse-n1 CPUs:
$ ffmpeg -nostats -f lavfi -i testsrc2=4k:d=2 -vf bench=start,scale=1024x1024,bench=stop -f null -
before: t:0.014015 avg:0.014096 max:0.015018 min:0.013971
after:  t:0.012985 avg:0.013013 max:0.013996 min:0.012818

Tested with `make check` on aarch64-linux.
Signed-off-by: Sebastian Pop <spop@amazon.com>
Reviewed-by: Clément Bœsch <u@pkh.me>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

ff_filter_frame() always frees the frame in case of error, so we don't
need to free the frame after ff_filter_frame() fails.

Fix CID 1457230.
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>

This always happened at start with alternative boundary mode disabled.
The clipping only occurred if starting samples where high enough.

Clipping can happen when smoothed gain is higher than maximum
allowed gain factor for current frame and peak value option is
set to enough low value.

In case of failure, all the successfully set entries are stored in
*pm. We need to manually free the created dictionary to avoid
memory leak.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>

In case of failure, all the successfully set entries are stored in
*pm. We need to manually free the created dictionary to avoid
memory leak.
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>

In case of failure, all the successfully set entries are stored in
*pm. We need to manually free the created dictionary to avoid
memory leak.
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>

In case of failure, all the successfully set entries are stored in
*pm. We need to manually free the created dictionary to avoid
memory leak.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>

The user should use ffmpeg -sources decklink or ffmpeg -sinks decklink instead.
Signed-off-by: Marton Balint <cus@passwd.hu>

Deprecated since Sep 28, 2017.
Signed-off-by: Marton Balint <cus@passwd.hu>

Deprecated since March 28, 2017.
Signed-off-by: Marton Balint <cus@passwd.hu>

Maybe we should just reject multiple streams for the image2 muxer instead?
Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

We still need to analyze frame for amplification at EOF.

Though this patch to fix ticket #6668, I belive it
is unnecessary to set SLICE_FLAG_ALLOW_FIELD flag to other
hwaccels(dxva, vdpau, etc). Please also refer the orginal comment
of 9cb150c9

Should also fix ticket #8442.
Signed-off-by: Zhong Li <zhong.li@intel.com>
Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>