diff options
| author | Mashiat Sarker Shakkhar <shahriman_ams@yahoo.com> | 2011-12-09 01:43:34 +0600 |
|---|---|---|
| committer | Mashiat Sarker Shakkhar <shahriman_ams@yahoo.com> | 2011-12-09 01:43:34 +0600 |
| commit | 4fa3f1c50718622ca04298d2d01b5a4c7d319cbf (patch) | |
| tree | 520186d261121acfd7abcb408f395473a8393e37 /libavcodec/wmalosslessdec.c | |
| parent | 153a8537180b69be073f97380b5f3c08b909bbb2 (diff) | |
Do not update buffers in case no speed change is necessary
Diffstat (limited to 'libavcodec/wmalosslessdec.c')
| -rw-r--r-- | libavcodec/wmalosslessdec.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/libavcodec/wmalosslessdec.c b/libavcodec/wmalosslessdec.c index 4c6df066b1..c61e39645a 100644 --- a/libavcodec/wmalosslessdec.c +++ b/libavcodec/wmalosslessdec.c @@ -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) { int ilms, recent, icoef; - s->update_speed[ich] = 16; for (ilms = s->cdlms_ttl[ich] - 1; ilms >= 0; ilms--) { recent = s->cdlms[ich][ilms].recent; + if (s->update_speed[ich] == 16) + continue; if (s->bV3RTM) { for (icoef = 0; icoef < s->cdlms[ich][ilms].order; icoef++) 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->update_speed[ich] = 16; } 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] - 1; ilms >= 0; ilms--) { recent = s->cdlms[ich][ilms].recent; + if (s->update_speed[ich] == 8) + continue; if (s->bV3RTM) { for (icoef = 0; icoef < s->cdlms[ich][ilms].order; icoef++) 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->update_speed[ich] = 8; } static void revert_cdlms(WmallDecodeCtx *s, int ch, int coef_begin, int coef_end) |