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

Export FF_PROFILE_PRORES_* symbols publicly, add a missing one.

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

Improve encoding speed by 2% (using prores input)

avcodec/proresenc_aw : use AVframe primaries, transfert, colorspace for frame header instead of default (unknown, unknown, Rec601)

avoid color shift, on some decoding software

Doesn't seems to make speed loss

coded_frame.key_frame should be set by the core already
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

This parameter can be used to inform the allocation code about how much
downsizing might occur, and can be used to optimize how to allocate the
packet
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Reviewed-by: NMichael Niedermayer <michaelni@gmx.at>
Signed-off-by: NJames Almer <jamrial@gmail.com>

The later may yield incorrect code for on-stack variables.
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Several encoders were multiplying the buffer size by 8, in order to get
a bit size. However, the buffer_size argument is for the byte size of
the buffer. We had experienced crashes encoding prores (Anatoliy) at
size 4096x4096.

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Based-on: a55546f4 by Diego Biurrun
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

See b2bed932.

Using the first names of authors sounds somewhat unprofessional
and might be considered offensive which is not intended.
The new names use the initials of the authors due to simplicity
and the possibility to apply it consistently without the need
to find political correct names for each future case where
alternative codecs might exist. Also its shorter ...

If someone has a better idea, like maybe 2 random letters
and people prefer it then iam happy to switch to that ...
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NPaul B Mahol <onemda@gmail.com>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Also remove some pointless NULL/0 assigments.

C++ code must be left as it is because named struct
initializers are not supported by C++ standard.

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NReimar Döffinger <Reimar.Doeffinger@gmx.de>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>