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Vulkan #1

Closed
wants to merge 8 commits into from
Closed

Vulkan #1

wants to merge 8 commits into from

Commits on Oct 27, 2019

  1. avutil/hwcontext: Add support for HW -> HW transfers 

    We are beginning to consider scenarios where a given HW Context
may be able to transfer frames to another HW Context without
passing via system memory - this would usually be when two
contexts represent different APIs on the same device (eg: Vulkan
and CUDA).

This is modelled as a transfer, as we have today, but where both
the src and the dst are hardware frames with hw contexts. We need
to be careful to ensure the contexts are compatible - particularly,
we cannot do transfers where one of the frames has been mapped via
a derived frames context - we can only do transfers for frames that
were directly allocated by the specified context.

Additionally, as we have two hardware contexts, the transfer function
could be implemented by either (or indeed both). To handle this
uncertainty, we explicitly look for ENOSYS as an indicator to try
the transfer in the other direction before giving up.
    @philipl @cyanreg
    philipl authored and cyanreg committed Oct 27, 2019
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  2. lavu: add Vulkan hwcontext code 

    This commit adds the necessary code to initialize and use a Vulkan device
within the hwcontext libavutil framework.
Currently direct mapping to VAAPI and DRM frames is functional, as well as
transfers to CUDA frames and native frames is supported.
    @cyanreg
    cyanreg committed Oct 27, 2019
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  3. avfilter/vf_hwupload: Add support for HW -> HW transfers 

    As we find ourselves wanting a way to transfer frames between
HW devices (or more realistically, between APIs on the same device),
it's desirable to have a way to describe the relationship. While
we could imagine introducing a `hwtransfer` filter, there is
almost no difference from `hwupload`. The main new feature we need
is a way to specify the target device. Having a single device
for the filter chain is obviously insufficient if we're dealing
with two devices.

So let's add a way to specify the upload target device, and if none
is specified, continue with the existing behaviour.

We must also correctly preserve the sw_format on such a transfer.
    @philipl @cyanreg
    philipl authored and cyanreg committed Oct 27, 2019
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  4. lavfi: add Vulkan filtering framework 

    This commit adds a Vulkan filtering infrastructure for libavfilter.
It attempts to abstract as much as possible of the Vulkan API from filters.
    @cyanreg
    cyanreg committed Oct 27, 2019
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  5. lavfi: add an scale_vulkan filter 

    This commit adds a basic, non-converting Vulkan scaling filter.
    @cyanreg
    cyanreg committed Oct 27, 2019
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  6. lavfi: add an overlay_vulkan filter 

    This commit adds a basic, non-converting overlay filter for Vulkan.
    @cyanreg
    cyanreg committed Oct 27, 2019
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  7. lavfi: add an avgblur_vulkan filter 

    This commit adds a fast avgblur Vulkan filter.
This will reset Intel GPUs on Windows due to a known, year-old driver bug.
    @cyanreg
    cyanreg committed Oct 27, 2019
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  8. lavfi: add an chromaber_vulkan filter 

    This commit adds a chromatic aberration filter for Vulkan that attempts to
emulate a lens chromatic aberration effect.
For a YUV frame it will instead shift chroma slightly, providing an
approximation to what would otherwise be an accurate emulation.
    @cyanreg
    cyanreg committed Oct 27, 2019
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