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avcodec/vlc: fix min/max bits calculation in multi vlc

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Improves speed with >8 bit depth inputs.
This commit is contained in:
Paul B Mahol 2023-09-26 21:50:45 +02:00
parent 14015b9e15
commit 58d9b5caf3
1 changed files with 8 additions and 2 deletions
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10
libavcodec/vlc.c
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@ -403,8 +403,14 @@ static int vlc_multi_gen(VLC_MULTI_ELEM *table, const VLC *single,
unsigned count[VLC_MULTI_MAX_SYMBOLS-1] = { 0, };
VLC_MULTI_ELEM info = { { 0, }, 0, };
minbits = buf[nb_codes-1].bits;
maxbits = FFMIN(buf[0].bits, numbits);
minbits = buf[0].bits;
maxbits = buf[0].bits;
for (int n = 1; n < nb_codes; n++) {
minbits = FFMIN(minbits, buf[n].bits);
maxbits = FFMAX(maxbits, buf[n].bits);
}
maxbits = FFMIN(maxbits, numbits);
while (max >= nb_codes/2) {
if (buf[max].bits+minbits > maxbits)