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avcodec/hevc_ps: Move log2_ctb_size checks up to prevent undefined shift operations 

Fixes CID1292293

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-05-13 14:38:11 +02:00
parent 65e5032955
commit 04da0d2586
1 changed files with 13 additions and 12 deletions
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25
libavcodec/hevc_ps.c
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@ -1110,6 +1110,19 @@ int ff_hevc_decode_nal_sps(HEVCContext *s)
sps->log2_diff_max_min_coding_block_size;
sps->log2_min_pu_size = sps->log2_min_cb_size - 1;
if (sps->log2_ctb_size > MAX_LOG2_CTB_SIZE) {
av_log(s->avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);
goto err;
}
if (sps->log2_ctb_size < 4) {
av_log(s->avctx,
AV_LOG_ERROR,
"log2_ctb_size %d differs from the bounds of any known profile\n",
sps->log2_ctb_size);
avpriv_request_sample(s->avctx, "log2_ctb_size %d", sps->log2_ctb_size);
goto err;
}
sps->ctb_width = (sps->width + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;
sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;
sps->ctb_size = sps->ctb_width * sps->ctb_height;
@ -1130,18 +1143,6 @@ int ff_hevc_decode_nal_sps(HEVCContext *s)
goto err;
}
if (sps->log2_ctb_size > MAX_LOG2_CTB_SIZE) {
av_log(s->avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);
goto err;
}
if (sps->log2_ctb_size < 4) {
av_log(s->avctx,
AV_LOG_ERROR,
"log2_ctb_size %d differs from the bounds of any known profile\n",
sps->log2_ctb_size);
avpriv_request_sample(s->avctx, "log2_ctb_size %d", sps->log2_ctb_size);
goto err;
}
if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {
av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",
sps->max_transform_hierarchy_depth_inter);