avcodec/dvdsubdec: Avoid branch in decode_run_8bit()

Speed improvment 35.5 sec -> 34.7sec

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

diff --git a/libavcodec/dvdsubdec.c b/libavcodec/dvdsubdec.c
index f1ac9e353e361980a613c6fe0352adbcb43ccbb1..13d52c8c688b9ce9a566c8edf3815fcc8fb07c2f 100644 (file)
--- a/libavcodec/dvdsubdec.c
+++ b/libavcodec/dvdsubdec.c
@@ -83,10 +83,7 @@ static int decode_run_8bit(GetBitContext *gb, int *color)
 {
     int len;
     int has_run = get_bits1(gb);
-    if (get_bits1(gb))
-        *color = get_bits(gb, 8);
-    else
-        *color = get_bits(gb, 2);
+    *color = get_bits(gb, 2 + 6*get_bits1(gb));
     if (has_run) {
         if (get_bits1(gb)) {
             len = get_bits(gb, 7);