[FFmpeg-cvslog] Implement use_high_update_speed() and use_normal_update_speed()

[Mashiat Sarker Shakkhar]

ffmpeg | branch: master | Mashiat Sarker Shakkhar <shahriman_ams at yahoo.com> | Thu Nov 10 13:42:10 2011 +0600| [3f3d2b5f65b7d803cb1c2fef41b99a7b17e87117] | committer: Mashiat Sarker Shakkhar

Implement use_high_update_speed() and use_normal_update_speed()

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3f3d2b5f65b7d803cb1c2fef41b99a7b17e87117
---

 libavcodec/wmalosslessdec.c |   32 ++++++++++++++++++++++++++++++++
 1 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/libavcodec/wmalosslessdec.c b/libavcodec/wmalosslessdec.c
index 500576b..7aab5ee 100644
--- a/libavcodec/wmalosslessdec.c
+++ b/libavcodec/wmalosslessdec.c
@@ -826,6 +826,38 @@ 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