diff options
| author | Andreas Rheinhardt <[email protected]> | 2025-06-13 03:04:45 +0200 |
|---|---|---|
| committer | Andreas Rheinhardt <[email protected]> | 2025-06-21 22:08:52 +0200 |
| commit | 70ce68d0212f7c1fd9b453fa203371dba05fb3af (patch) | |
| tree | a85ed94514249045ed1c51e1f2ee4e57a760f3dd | |
| parent | dcd7408c9200464bc33293b96f439121af2dd692 (diff) | |
avcodec/mpegvideo: Don't reset AC values of upper-left luma block
Said block will only be referenced by blocks from the same macroblock,
which will read the new AC values instead of the reset values
from this function.
Signed-off-by: Andreas Rheinhardt <[email protected]>
| -rw-r--r-- | libavcodec/mpegvideo.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c index a27efa8b89..b481d1eef4 100644 --- a/libavcodec/mpegvideo.c +++ b/libavcodec/mpegvideo.c @@ -506,7 +506,9 @@ void ff_clean_intra_table_entries(MpegEncContext *s) /* ac pred */ int16_t (*ac_val)[16] = s->ac_val[0]; av_assume(!((uintptr_t)ac_val & 0xF)); - memset(ac_val[xy ], 0, 2 * sizeof(*ac_val)); + // Don't reset the upper-left luma block, as it will only ever be + // referenced by blocks from the same macroblock. + memset(ac_val[xy + 1], 0, sizeof(*ac_val)); memset(ac_val[xy + wrap], 0, 2 * sizeof(*ac_val)); /* ac pred */ memset(ac_val[uxy], 0, sizeof(*ac_val)); |