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vaapi_decode: support dynamically frame pool resizing. #397

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vaapi_decode: support dynamically frame pool resizing. #397

wants to merge 4 commits into from

Commits on Jul 7, 2021

  1. avutils: hwcontext_vaapi, print error if allocated surfaces > pool size

    @xuguangxin
    xuguangxin committed Jul 7, 2021
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  2. avutil: hwcontext_vaapi, add AV_VAAPI_DRIVER_QUIRK_FRAME_POOL_RESIZING

    @xuguangxin
    xuguangxin committed Jul 7, 2021
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  3. avutil: hwcontext_vaapi, mark i965, VDPAU and ubit driver as AV_VAAPI… 

    …_DRIVER_QUIRK_FRAME_POOL_RESIZING
    @xuguangxin
    xuguangxin committed Jul 7, 2021
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  4. avcodec: vaapi_decode, do not set initial_pool_size if driver support… 

    …s frame pool resizing

Two benifites of this commit:
1. Save memory. If we play an 8k hevc, previous code we allocate 50M * 20(1 + 16 + 3) = 1G memory.16 is a waste for most playback cases.
2. Allow downstream cache more frames. A downstream lookahead encoder will cache some frames. 20 may not enough for it.

This commit will fix the following command
ffmpeg -hwaccel vaapi -hwaccel_output_format vaapi -i 100frames.264  -vf reverse -an -f null -
    @xuguangxin
    xuguangxin committed Jul 7, 2021
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