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cuvid: support AVCodecContext.hw_device_ctx API

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This is a newer API that is intended for decoders like the cuvid
wrapper. Until now, the wrapper required to set an awkward
"incomplete" hw_frames_ctx to set the device. Now the device
can be set directly, and the user can get AV_PIX_FMT_CUDA output
for a specific device simply by setting hw_device_ctx.

This still does a dummy ff_get_format() call at init time, and should
be fully backward compatible.
This commit is contained in:
wm4
2017-05-05 00:15:21 +02:00
parent 974ee16d6a
commit c0f17a905f
3 changed files with 17 additions and 4 deletions
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doc/APIchanges
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@@ -15,6 +15,11 @@ libavutil: 2015-08-28
API changes, most recent first:
2017-05-05 - xxxxxxxxxx - lavc 57.94.100 - avcodec.h
The cuvid decoders now support AVCodecContext.hw_device_ctx, which removes
the requirement to set an incomplete AVCodecContext.hw_frames_ctx only to
set the Cuda device handle.
2017-04-11 - 8378466507 - lavu 55.61.100 - avstring.h
Add av_strireplace().