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Code Issues Releases Activity

avcodec/wnv1: Apply offset during init, not later every time

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Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-10-26 00:28:46 +01:00
parent a8646a7b3f
commit 4a772b1397
1 changed files with 3 additions and 3 deletions
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6
libavcodec/wnv1.c
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@ -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); 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; return get_bits(gb, 8 - shift) << shift;
else else
return base_value + ((v - 7U) << shift); return base_value + v * (1 << shift);
} }
static int decode_frame(AVCodecContext *avctx, 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, INIT_VLC_STATIC_FROM_LENGTHS(&code_vlc, CODE_VLC_BITS, 16,
&code_tab[0][1], 2, &code_tab[0][1], 2,
&code_tab[0][0], 2, 1, &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; return 0;
} }