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[FFmpeg-devel,v2,024/162] avcodec/wnv1: Apply offset during init, not later every time

Message ID 20201120072116.818090-25-andreas.rheinhardt@gmail.com
State Accepted
Headers show
Series VLC, esp. init_vlc patches | expand

Checks

Context Check Description
andriy/x86_make success Make finished
andriy/x86_make_fate success Make fate finished

Commit Message

Andreas Rheinhardt Nov. 20, 2020, 7:18 a.m. UTC 
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
---
 libavcodec/wnv1.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
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Patch

diff --git a/libavcodec/wnv1.c b/libavcodec/wnv1.c
index f8a9b94746..7dd0e72596 100644
--- a/libavcodec/wnv1.c
+++ b/libavcodec/wnv1.c
@@ -43,10 +43,10 @@  static inline int wnv1_get_code(GetBitContext *gb, int shift, int base_value)
 {
     int v = get_vlc2(gb, code_vlc.table, CODE_VLC_BITS, 1);
 
-    if (v == 15)
+    if (v == 8)
         return get_bits(gb, 8 - shift) << shift;
     else
-        return base_value + ((v - 7U) << shift);
+        return base_value + v * (1 << shift);
 }
 
 static int decode_frame(AVCodecContext *avctx,
@@ -119,7 +119,7 @@  static av_cold int decode_init(AVCodecContext *avctx)
     INIT_VLC_STATIC_FROM_LENGTHS(&code_vlc, CODE_VLC_BITS, 16,
                                  &code_tab[0][1], 2,
                                  &code_tab[0][0], 2, 1,
-                                 0, INIT_VLC_OUTPUT_LE, 1 << CODE_VLC_BITS);
+                                 -7, INIT_VLC_OUTPUT_LE, 1 << CODE_VLC_BITS);
     return 0;
 }