[FFmpeg-soc] [soc]: r5665 - libavfilter/vf_rotate.c

[Bobby Bingham]

On Sat, 13 Mar 2010 14:55:11 +0100 (CET)
stefano <subversion at mplayerhq.hu> wrote:

> Author: stefano
> Date: Sat Mar 13 14:55:11 2010
> New Revision: 5665
> 
> Log:
> Prevent rotate from calling avfilter_default_draw_slice(), which was
> causing randomic behaviour.
> 
> Only one slice has to be passed to the next filter, in the end_frame()
> callback.

Perhaps a better solution is actually to change
av_filter_draw_slice() to not call avfilter_default_draw_slice().
I see three cases:

1. filters like vf_rotate, vf_transpose, etc which only send one slice
at the very end.  These should not call avfilter_default_draw_slice().

2. filters which do some filtering in their own draw_slice.  These
always override avfilter_default_draw_slice().

3. filters which do not touch the video data: vf_null, vf_setpts, etc.
These can use avfilter_default_draw_slice(), but I think they are the
minority of filters.  They can simply specify
avfilter_default_draw_slice as their draw_slice callback.

-- 
Bobby Bingham
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