[FFmpeg-trac] #3396(avcodec:new): Intel DXVA2 H.264 Improvements for SNB GPUs

[FFmpeg]

#3396: Intel DXVA2 H.264 Improvements for SNB GPUs
-------------------------------------+-------------------------------------
             Reporter:  afedchin     |                     Type:
               Status:  new          |  enhancement
            Component:  avcodec      |                 Priority:  normal
             Keywords:  dxva h264    |                  Version:  git-
  Intel                              |  master
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------
 There are a set of patches for add some improvements for
 SandyBridge/IvyBridge Intel GPUs. This still actual for SNB GPU. The
 latest drivers for IVB/Haswell doesn't include the old
 DXVADDI_Intel_ModeH264_E device and doesn't experience the issue but SNB
 still.

 http://patches.libav.org/patch/35320/
 http://patches.libav.org/patch/35321/

 See discussion https://lists.libav.org/pipermail/libav-
 devel/2013-March/043945.html for more info.

 The main issue is h264 with refs > 11 decoded on DXVADDI_Intel_ModeH264_E
 device with artifacts. And solution is use standard Microsoft H264 device
 DXVA2_ModeH264_E but decoding with Microsoft H264 on SNB will no work
 without this improvements.

 This still actual for lastest git-master.

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Ticket URL: <https://trac.ffmpeg.org/ticket/3396>
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