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avcodec/error_resilience: Use a symmetric check for skipping MV estimation 

This speeds up the testcase by a factor of 4

Fixes: Timeout
Fixes: 13100/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMV2_fuzzer-5767533905313792

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-02-19 18:41:42 +01:00
parent 32d022d26d
commit e4289cb253
1 changed files with 1 additions and 1 deletions
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2
libavcodec/error_resilience.c
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@ -437,7 +437,7 @@ static void guess_mv(ERContext *s)
}
if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
num_avail <= mb_width / 2) {
num_avail <= FFMAX(mb_width, mb_height) / 2) {
for (mb_y = 0; mb_y < mb_height; mb_y++) {
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
const int mb_xy = mb_x + mb_y * s->mb_stride;