This improves the speed of decoding large patches of constant color

Fixes: Timeout
Fixes: 10967/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QPEG_fuzzer-5630803793936384

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

only 16b alpha is supported (not 8 bits)

following official encoder, alpha data doesn't impact
yuv plane quality.

So the alpha data encoding is done after the yuv part.
It's also avoid to loose quality in yuv part when
alpha is not uniform.

the alpha encoding funcs is mainly take from prores_ks
encoder, except for the alpha data reorganization

description are based on multimedia wiki documentation

use b64a as src pix fmt (doesn't seems to have an impact on decoding)
but it's the value use by official encoder

The earlier code used the most recent non-auxiliary slice to determine
whether an auxiliary slice has the syntax of an IDR slice, even when
the most recent slice was from a slice of a redundant frame. Now only
slices of the primary coded picture are used, as the specifications
mandate.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@googlemail.com>

Fixes ticket #7536.

Suppress the complain "variables 'pix_fmt' is used but maybe
uninitialized".
Signed-off-by: Zhong Li <zhong.li@intel.com>

Flush the buffered data in libmfx before video param reinit
in case the frames drop.

Cache the first frame causing the reinit and decode zero-size
pkt to flush the buffered pkt before reinit. After all the
buffered pkts being flushed, resume to reinit and decode.

Fix the issue in ticket #7399.

[V2]: Move the definition of zero_pkt to where it is exactly
used.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
Signed-off-by: Zhong Li <zhong.li@intel.com>

Originally written by Ronald S. Bultje, with fixes, optimizations and
improvements by James Almer.
Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: Ruiling Song <ruiling.song@intel.com>
Signed-off-by: Gyan Doshi <gyandoshi@gmail.com>

Signed-off-by: Danil Iashchenko <danyaschenko@gmail.com>
Signed-off-by: Ruiling Song <ruiling.song@intel.com>
Signed-off-by: Gyan Doshi <gyandoshi@gmail.com>

Export FF_PROFILE_PRORES_* symbols publicly, add a missing one.

In all Apple documentation, this profile is called Prores 4444.

Signed-off-by: Martin Storsjö <martin@martin.st>

This is always treated as a subtitle at the moment anyway.
Signed-off-by: Martin Storsjö <martin@martin.st>

libx264 does have a field for opaque data to pass along with frames
through the encoder, but it is a pointer, while the libavcodec
reordered_opaque field is an int64_t. Therefore, allocate an array
within the libx264 wrapper, where reordered_opaque values in flight
are stored, and pass a pointer to this array to libx264.

Update the public libavcodec documentation for the AVCodecContext
field to explain this usage, and add a codec capability that allows
detecting whether an encoder handles this field.
Signed-off-by: Martin Storsjö <martin@martin.st>

This was marked as deprecated (but only in the doxygen, not with an
actual deprecation attribute) in 81c623fa in 2011, but was
undeprecated in ad1ee5fa.
Signed-off-by: Martin Storsjö <martin@martin.st>

buffer_delay_length_minus_1 is five bits long, meaning decode_buffer_delay and
encoder_buffer_delay can have values up to 32 bits long.
Reviewed-by: Mark Thompson <sw@jkqxz.net>
Signed-off-by: James Almer <jamrial@gmail.com>

Fixes ticket #7481.
Signed-off-by: Marton Balint <cus@passwd.hu>