[FFmpeg-trac] #8076(avfilter:new): QSV HW Context types mismach

[FFmpeg]

#8076: QSV HW Context types mismach
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             Reporter:  fortman      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  avfilter     |                  Version:  git-
             Keywords:               |  master
  hwcontext_qsv                      |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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 Summary of the bug:

 When reviewing the conde of the QSV HW Context I discovered a mismatch
 between the "handle_types" and "supported_handle_types". These variables
 are used to defined the surfaces for the context: D3D11, D3D9, VAAPI, etc.

 However, the values are defined multiple times, instead of just one time:
 - libavcodec/qsv.c: handle_types
   https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/qsv.c#L625
 - libavfilter/qsvvpp.c: handle_types
 https://github.com/FFmpeg/FFmpeg/blob/e62f625163f8cde794ebe02bc228735b4e65c772/libavfilter/qsvvpp.c#L71
 - libavfilter/vf_scale_qsv.c: handle_types
 https://github.com/FFmpeg/FFmpeg/blob/dd662bbdd26e09957b3e67d3cde07b9468931e15/libavfilter/vf_scale_qsv.c#L271
 - libavfilter/vf_deinterlace_qsv.c: handle_types
 https://github.com/FFmpeg/FFmpeg/blob/165eabf19bf21d235e1b5254314ba2ba5c627454/libavfilter/vf_deinterlace_qsv.c#L164

 And futhermore:

 - libavutil/hwcontext_qsv.c: supported_handle_types
 https://github.com/FFmpeg/FFmpeg/blob/b3b7523feb5acbe1a3376104616fca389e1aaeca/libavutil/hwcontext_qsv.c#L92

 As a consequence, when for example a new surface is created in Windows,
 the surface selected is D3D9, instead of D3D11. But when some other filter
 creates a context with a D3D11 surface and this surface is passed to the
 QSV HW Context, the surface is used without any problem.

 So I request to refactor the code and eliminate the multiple declarations.
 And then to initialize first to D3D11 surfaces in Windows.

 Thank you!

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Ticket URL: <https://trac.ffmpeg.org/ticket/8076>
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