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Implement use_high_update_speed() and use_normal_update_speed()

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(cherry picked from commit 9ebc93fa4623791eca9efeee4de65b23dc015de1)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Mashiat Sarker Shakkhar
2011-11-10 13:42:10 +06:00
committed by Michael Niedermayer
parent 144d815912
commit 9ef5d707e6
1 changed files with 32 additions and 0 deletions
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32
libavcodec/wmalosslessdec.c
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@@ -829,6 +829,38 @@ static void lms_update(WmallDecodeCtx *s, int ich, int ilms, int32_t input, int3
}
}
static void use_high_update_speed(WmallDecodeCtx *s, int ich)
{
int ilms, recent, icoef;
s->update_speed[ich] = 16;
for (ilms = s->cdlms_ttl[ich]; ilms >= 0; ilms--) {
recent = s->cdlms[ich][ilms].recent;
if (s->bV3RTM) {
for (icoef = 0; icoef < s->cdlms[ich][ilms].order; icoef++)
s->cdlms[ich][ilms].lms_updates[icoef + recent] *= 2;
} else {
for (icoef = 0; icoef < s->cdlms[ich][ilms].order; icoef++)
s->cdlms[ich][ilms].lms_updates[icoef] *= 2;
}
}
}
static void use_normal_update_speed(WmallDecodeCtx *s, int ich)
{
int ilms, recent, icoef;
s->update_speed[ich] = 8;
for (ilms = s->cdlms_ttl[ich]; ilms >= 0; ilms--) {
recent = s->cdlms[ich][ilms].recent;
if (s->bV3RTM) {
for (icoef = 0; icoef < s->cdlms[ich][ilms].order; icoef++)
s->cdlms[ich][ilms].lms_updates[icoef + recent] /= 2;
} else {
for (icoef = 0; icoef < s->cdlms[ich][ilms].order; icoef++)
s->cdlms[ich][ilms].lms_updates[icoef] /= 2;
}
}
}
/**
*@brief Decode a single subframe (block).
*@param s codec context