From 9ef5d707e6c12ec5164e6612d547f845da9cbafc Mon Sep 17 00:00:00 2001 From: Mashiat Sarker Shakkhar Date: Thu, 10 Nov 2011 13:42:10 +0600 Subject: [PATCH] Implement use_high_update_speed() and use_normal_update_speed() (cherry picked from commit 9ebc93fa4623791eca9efeee4de65b23dc015de1) Signed-off-by: Michael Niedermayer --- libavcodec/wmalosslessdec.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/libavcodec/wmalosslessdec.c b/libavcodec/wmalosslessdec.c index 8faa93efb3..7427cb873f 100644 --- a/libavcodec/wmalosslessdec.c +++ b/libavcodec/wmalosslessdec.c @@ -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