This ensures they will be reference counted, as required by the AVCodec.receive_packet()
API.

Should fix ticket #8386.
Signed-off-by: James Almer <jamrial@gmail.com>

Added linux support for amf encoder through vulkan.

To use h.264(AMD VCE) encoder on linux amdgru-pro version 19.20+ and
amf-amdgpu-pro package(amdgru-pro contains, but does not install
automatically) are required.

This driver can be installed using amdgpu-pro-install script in
official amd driver archive.

Initialization of amf encoder occurs in this order:
1) trying to initialize through dx11(only windows)
2) trying to initialize through dx9(only windows)
3) trying to initialize through vulkan

Only Vulkan initialization available on linux.

This fixes frame corruption issue when decoder started reusing frames
while they are still in use of encoding process

Issue with frame corruption  was reproduced using:

    avconv.exe -y -hwaccel d3d11va -hwaccel_output_format d3d11 -i input.h264 -an -c:v h264_amf output.mkv

It is recommended to use -extra_hw_frames 16 option in case if hw frames
number in pool is not enough
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Also minor cosmetics.

Adds support for AMF initialisation from a DXVA2 (Direct3D9) device, and
then allows passing DXVA2 surfaces into an AMF encoder.
Signed-off-by: Mark Thompson <sw@jkqxz.net>

Signed-off-by: Mark Thompson <sw@jkqxz.net>

Supplying a hardware input frame which is not in the input hardware frames
context is not allowed by the API, so additional code to handle it is not
necessary.  Further, handling it automatically results in very low
performance - it is more appropriate to fail immediately so that the user
can fix their incorrect setup.

If the user supplies a device or frames context then it is an error
not to use it; this is consistent with other hardware components.

Also factorise out the D3D11 initialisation and improve error
messages.

Fixes ticket #6990.
Tested-by: James Almer <jamrial@gmail.com>
Reviewed-by: Mark Thompson <sw@jkqxz.net>

AMFTraceWriter is an abstraction to configure how AMF outputs its logs
for the current process and can be configured to output different levels
of trace output. If multiple LibavWriter objects are used in one process,
there will be duplication of output in av_log. Use a constant writer_id
to prevent this scenario.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

Requires AMF headers for at least version 1.4.4.1.
Signed-off-by: Mikhail Mironov <mikhail.mironov@amd.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Signed-off-by: James Almer <jamrial@gmail.com>

Requires AMF headers for at least version 1.4.4.1.
Signed-off-by: Mikhail Mironov <mikhail.mironov@amd.com>
Signed-off-by: Mark Thompson <sw@jkqxz.net>