Add CODEC_FLAG2_SKIP_MANUAL (exposed as "skip_manual"), which makes
the decoder export sample skip information via side data, instead
of applying it automatically. The format of the side data is the
same as AV_PKT_DATA_SKIP_SAMPLES, but since AVPacket and AVFrame
side data constants overlap, AV_FRAME_DATA_SKIP_SAMPLES needs to
be introduced.

This is useful for applications which want to do the timestamp
calculations manually, or which actually want to retrieve the
padding.
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Also replace the plural form "multiplies" with "multiples".

The reasoning behind this addition is that various third party
applications are interested in getting some motion information out of a
video "for free" when it is available.

It was considered to export other information as well (such as the intra
information about the block, or the quantization) but the structure
might have ended up into a half full-generic, half full of codec
specific cruft. If more information is necessary, it should either be
added in the "flags" field of the AVMotionVector structure, or in
another side-data.

This commit also includes an example exporting them in a CSV stream.

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

Signed-off-by: NDiego Biurrun <diego@biurrun.de>

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

Reviewed-by: NTimothy Gu <timothygu99@gmail.com>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NAnton Khirnov <anton@khirnov.net>

Add AV_PKT_DATA_DISPLAYMATRIX and AV_FRAME_DATA_DISPLAYMATRIX as stream and
frame side data (respectively) to describe a display transformation matrix
for linear transformation operations on the decoded video.

Add functions to easily extract a rotation angle from a matrix and
conversely to setup a matrix for a given rotation angle.
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

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

Includes a libavcodec utility function to update a frame's side data.

Signed-off-by: NAnton Khirnov <anton@khirnov.net>

This can be optionally disabled whith the "output_corrupt" flags
option.  When in "output_corrupt" mode, incomplete frames are
signalled through AVFrame.flags FRAME_FLAG_INCOMPLETE_FRAME.
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

Signed-off-by: NAnton Khirnov <anton@khirnov.net>

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

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

Signed-off-by: NAnton Khirnov <anton@khirnov.net>

This also moves AVColorSpace and AVColorRange from avcodec to avutil
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Related to Ticket2375
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

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

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

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

Add AVBuffer-based reference counting API to it.