[FFmpeg-devel] [PATCH 1/2] wmalosslessdec: avoid reading 0 bits with get_bits

[Andreas Cadhalpun]

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
---
 libavcodec/wmalosslessdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/wmalosslessdec.c b/libavcodec/wmalosslessdec.c
index 843ce90..8094db3 100644
--- a/libavcodec/wmalosslessdec.c
+++ b/libavcodec/wmalosslessdec.c
@@ -488,7 +488,7 @@ static int decode_cdlms(WmallDecodeCtx *s)
                 if ((1 << cbits) < s->cdlms[c][i].scaling + 1)
                     cbits++;
 
-                s->cdlms[c][i].bitsend = get_bits(&s->gb, cbits) + 2;
+                s->cdlms[c][i].bitsend = (cbits ? get_bits(&s->gb, cbits) : 0) + 2;
                 shift_l = 32 - s->cdlms[c][i].bitsend;
                 shift_r = 32 - s->cdlms[c][i].scaling - 2;
                 for (j = 0; j < s->cdlms[c][i].coefsend; j++)
-- 
2.1.4