This allows better checking of capabilities and will make it easier
to add more functionality later.

It also commonises some duplicated code around rate control setup
and adds more comments explaining the internals.

(cherry picked from commit 80a5d051)

There should be an extra offset of 6 on bit_rate_scale and of 4 on
cpb_size_scale which were not accounted for here.

(cherry picked from commit 3a9662af)

Fixes Debian bugs #831529, #831909, #832964.
Signed-off-by: NMark Thompson <sw@jkqxz.net>

Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

This will prevent conflicts e.g. in code that deals with both h264 and
hevc.

Move the NAL unit types into it. This will allow to stop including the
whole decoder-specific h264dec.h in some code that is unrelated to the
decoder and only needs some enum values.

This is more consistent with the naming of other decoders.

Contains the libavcodec version, the VAAPI version and the libva
driver vendor string.

Send buffering_period and pic_timing messages when in modes
targetting bitrate.  Also adds NAL HRD parameters to VUI.

Supports aspect ratio, colour format and timing information.

Experimental; requires Skylake and VAAPI 0.39.1 (not yet released).
Also increases the allowed range of the quality option - in low-power
mode, the Intel driver supports levels 1-8 (and 0 meaning default).

Non-reference frames (nal_ref_idc == 0) should be discardable, so
frame_num does not advance after them.  Before this change, a stream
containing unreferenced B-frames would be rejected by the reference
decoder.

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

Only supported on VAAPI 0.36 and higher.
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

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

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

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

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