[FFmpeg-cvslog] avcodec/imm4: Don't use too big VLC table
Andreas Rheinhardt
git at videolan.org
Tue Nov 24 12:49:33 EET 2020
ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Mon Nov 16 13:27:22 2020 +0100| [50d50653d106184b60f464eeba20e132c137090e] | committer: Andreas Rheinhardt
avcodec/imm4: Don't use too big VLC table
Using more bits than the longest code has makes no sense.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=50d50653d106184b60f464eeba20e132c137090e
---
libavcodec/imm4.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/libavcodec/imm4.c b/libavcodec/imm4.c
index d92bc30ddc..85d8526bc8 100644
--- a/libavcodec/imm4.c
+++ b/libavcodec/imm4.c
@@ -33,6 +33,8 @@
#include "idctdsp.h"
#include "internal.h"
+#define CBPLO_VLC_BITS 6
+
typedef struct IMM4Context {
BswapDSPContext bdsp;
GetBitContext gb;
@@ -488,8 +490,9 @@ static int decode_frame(AVCodecContext *avctx, void *data,
static av_cold void imm4_init_static_data(void)
{
- INIT_VLC_SPARSE_STATIC(&cbplo_tab, 9, FF_ARRAY_ELEMS(cbplo_bits),
- cbplo_bits, 1, 1, cbplo_codes, 1, 1, cbplo_symbols, 1, 1, 512);
+ INIT_VLC_SPARSE_STATIC(&cbplo_tab, CBPLO_VLC_BITS, FF_ARRAY_ELEMS(cbplo_bits),
+ cbplo_bits, 1, 1, cbplo_codes, 1, 1, cbplo_symbols, 1, 1,
+ 1 << CBPLO_VLC_BITS);
INIT_VLC_SPARSE_STATIC(&cbphi_tab, 6, FF_ARRAY_ELEMS(cbphi_bits),
cbphi_bits, 1, 1, cbphi_codes, 1, 1, NULL, 0, 0, 64);
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