[FFmpeg-devel] [PATCH 0/2] WIP: h264, slice threads, draw_horiz_band

[James Darnley]

Trying a combination of sliced threads, chunk decoding, and draw_horiz_band we
found that it didn't work with the current master code.  Modifying the
api-h264-slice fate test showed obvious errors with grey and green blocks and
more subtle ones that looked like misplaced macroblocks.

Kieran identified the cause and coded this quick fix.  He said that essentially
the code would give a region to draw_horiz_band which could include the previous
slice even if it hadn't been finished yet.

This corrects that problem and lets us decode exactly.  However it does cause
errors decoding B-frames in chunked mode.

Needs more work.

James Darnley (1):
  avcodec/h264: enable draw_horiz_band

Kieran Kunhya (1):
  avcodec/h264: fix draw_horiz_band with slice threads

 libavcodec/h264_slice.c | 29 +++++++++++++++++++++++------
 libavcodec/h264dec.c    |  2 +-
 2 files changed, 24 insertions(+), 7 deletions(-)

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2.22.0