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Do not update buffers in case no speed change is necessary

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This commit is contained in:
Mashiat Sarker Shakkhar 2011-12-09 01:43:34 +06:00
parent 153a853718
commit 4fa3f1c507
1 changed files with 6 additions and 2 deletions
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8
libavcodec/wmalosslessdec.c
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@ -948,9 +948,10 @@ static void lms_update(WmallDecodeCtx *s, int ich, int ilms, int input, int resi
static void use_high_update_speed(WmallDecodeCtx *s, int ich) static void use_high_update_speed(WmallDecodeCtx *s, int ich)
{ {
int ilms, recent, icoef; int ilms, recent, icoef;
s->update_speed[ich] = 16;
for (ilms = s->cdlms_ttl[ich] - 1; ilms >= 0; ilms--) { for (ilms = s->cdlms_ttl[ich] - 1; ilms >= 0; ilms--) {
recent = s->cdlms[ich][ilms].recent; recent = s->cdlms[ich][ilms].recent;
if (s->update_speed[ich] == 16)
continue;
if (s->bV3RTM) { if (s->bV3RTM) {
for (icoef = 0; icoef < s->cdlms[ich][ilms].order; icoef++) for (icoef = 0; icoef < s->cdlms[ich][ilms].order; icoef++)
s->cdlms[ich][ilms].lms_updates[icoef + recent] *= 2; s->cdlms[ich][ilms].lms_updates[icoef + recent] *= 2;
@ -959,14 +960,16 @@ static void use_high_update_speed(WmallDecodeCtx *s, int ich)
s->cdlms[ich][ilms].lms_updates[icoef] *= 2; s->cdlms[ich][ilms].lms_updates[icoef] *= 2;
} }
} }
s->update_speed[ich] = 16;
} }
static void use_normal_update_speed(WmallDecodeCtx *s, int ich) static void use_normal_update_speed(WmallDecodeCtx *s, int ich)
{ {
int ilms, recent, icoef; int ilms, recent, icoef;
s->update_speed[ich] = 8;
for (ilms = s->cdlms_ttl[ich] - 1; ilms >= 0; ilms--) { for (ilms = s->cdlms_ttl[ich] - 1; ilms >= 0; ilms--) {
recent = s->cdlms[ich][ilms].recent; recent = s->cdlms[ich][ilms].recent;
if (s->update_speed[ich] == 8)
continue;
if (s->bV3RTM) { if (s->bV3RTM) {
for (icoef = 0; icoef < s->cdlms[ich][ilms].order; icoef++) for (icoef = 0; icoef < s->cdlms[ich][ilms].order; icoef++)
s->cdlms[ich][ilms].lms_updates[icoef + recent] /= 2; s->cdlms[ich][ilms].lms_updates[icoef + recent] /= 2;
@ -975,6 +978,7 @@ static void use_normal_update_speed(WmallDecodeCtx *s, int ich)
s->cdlms[ich][ilms].lms_updates[icoef] /= 2; s->cdlms[ich][ilms].lms_updates[icoef] /= 2;
} }
} }
s->update_speed[ich] = 8;
} }
static void revert_cdlms(WmallDecodeCtx *s, int ch, int coef_begin, int coef_end) static void revert_cdlms(WmallDecodeCtx *s, int ch, int coef_begin, int coef_end)