media: hantro: HEVC: Fix reference frames management

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PoC shall be int the range of -2^31 to 2^31 -1
(HEVC spec section 8.3.1 Decoding process for picture order count).
The current way to know if an entry in reference picture array is free
is to test if PoC = UNUSED_REF. Since UNUSED_REF is defined as '-1' that
could lead to decode issue if one PoC also equal '-1'.
PoC with value = '-1' exists in conformance test SLIST_B_Sony_9.

Change the way unused entries are managed in reference pictures array to
avoid using PoC to detect then.

This patch doesn't change fluster HEVC score.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

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This commit is contained in:

Benjamin Gaignard 2022-05-03 15:51:38 +02:00 • committed by Mauro Carvalho Chehab

parent d7f4149df8

commit 387d117695

3 changed files with 5 additions and 28 deletions

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4

drivers/staging/media/hantro/hantro_g2_hevc_dec.c

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27

drivers/staging/media/hantro/hantro_hevc.c

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2

drivers/staging/media/hantro/hantro_hw.h

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