Change #264166

Comments

swscale: add FFFramePool and use it for allocating planes
The major consequence of this is that we start allocating buffers per plane,
instead of allocating one contiguous buffer. This makes the no-op/refcopy
case slightly slower, but doesn't meaningfully affect the rest:

yuva444p -> yuva444p, time=157/1000 us (ref=78/1000 us), speedup=0.497x slower
Overall speedup=1.016x faster, min=0.983x max=1.092x

However, this is a necessary consequence of the desire to allow partial plane
allocations / single plane refcopies. This slowdown also does not affect
vf_scale, which already uses avfilter/framepool.c (via ff_get_video_buffer).

Signed-off-by: Niklas Haas <git@haasn.dev>

Changed files

• libswscale/Makefile
• libswscale/framepool.c
• libswscale/swscale.c
• libswscale/swscale_internal.h
• libswscale/utils.c