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Code Issues Releases Activity

avcodec/dnxhdenc: Fix undefined left shifts of negative numbers

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Affected 61 FATE-tests: 60 vsynth tests and lavf-mxf_opatom.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit b7f156e8cb)
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2019-09-28 04:26:06 +02:00
parent 1101cf30ec
commit ab3b008dad
1 changed files with 3 additions and 3 deletions
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6
libavcodec/dnxhdenc.c
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@ -220,7 +220,7 @@ static av_cold int dnxhd_init_vlc(DNXHDEncContext *ctx)
ctx->vlc_bits = ctx->orig_vlc_bits + max_level * 2;
for (level = -max_level; level < max_level; level++) {
for (run = 0; run < 2; run++) {
int index = (level << 1) | run;
int index = level * (1 << 1) | run;
int sign, offset = 0, alevel = level;
MASK_ABS(sign, alevel);
@ -616,7 +616,7 @@ void dnxhd_encode_block(DNXHDEncContext *ctx, int16_t *block,
slevel = block[j];
if (slevel) {
int run_level = i - last_non_zero - 1;
int rlevel = (slevel << 1) | !!run_level;
int rlevel = slevel * (1 << 1) | !!run_level;
put_bits(&ctx->m.pb, ctx->vlc_bits[rlevel], ctx->vlc_codes[rlevel]);
if (run_level)
put_bits(&ctx->m.pb, ctx->run_bits[run_level],
@ -696,7 +696,7 @@ int dnxhd_calc_ac_bits(DNXHDEncContext *ctx, int16_t *block, int last_index)
level = block[j];
if (level) {
int run_level = i - last_non_zero - 1;
bits += ctx->vlc_bits[(level << 1) |
bits += ctx->vlc_bits[level * (1 << 1) |
!!run_level] + ctx->run_bits[run_level];
last_non_zero = i;
}