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avcodec/mpegutils: Remap MB_TYPE_ACPRED, add codec-specific MB_TYPE

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MB_TYPE_ACPRED is currently reused for MB_TYPE_REF0 by H.264,
so that the value fits into an uint16_t. Given that MB_TYPE_ACPRED
is not subject to any such restriction (apart from fitting into
32bits), it can be remapped to a hithereto unused bit.
The then available bit will be declared to be codec-specific
(i.e. unused by generic code), so that H.264 can use it
for MB_TYPE_REF0 and so that it can be reused later for
e.g. MB_TYPE_H261_FIL.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2024-06-02 09:07:33 +02:00
parent 5805b860fe
commit dd1e804a98
3 changed files with 6 additions and 3 deletions
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libavcodec/mpegutils.c
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@ -109,7 +109,7 @@ static char get_type_mv_char(int mb_type)
// Type & MV direction
if (IS_PCM(mb_type))
return 'P';
else if (IS_INTRA(mb_type) && IS_ACPRED(mb_type))
else if (IS_ACPRED(mb_type))
return 'A';
else if (IS_INTRA4x4(mb_type))
return 'i';