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| author | Yaowu Xu <yaowu@google.com> | 2014-10-07 11:22:09 -0700 |
|---|---|---|
| committer | Yaowu Xu <yaowu@google.com> | 2014-10-07 11:30:13 -0700 |
| commit | 9751aa1264b9cff20b729bbe825c6ff25ff47a12 (patch) | |
| tree | a1c6f74f53a2ced43c2b018412fbbf2a8d7e88a2 /vp9 | |
| parent | a75551585b0fb1ea8705e7e5c53433cfffabbab6 (diff) | |
| download | libvpx-9751aa1264b9cff20b729bbe825c6ff25ff47a12.tar libvpx-9751aa1264b9cff20b729bbe825c6ff25ff47a12.tar.gz libvpx-9751aa1264b9cff20b729bbe825c6ff25ff47a12.tar.bz2 libvpx-9751aa1264b9cff20b729bbe825c6ff25ff47a12.zip | |
Add range checking for decoded coefficients.
The coefficient range checking is enabled when configured with
--enable-debug --enable-coefficient-range-checking
for vpxdec to detect ill-formed input stream. This addresses the
problem raised by issue #792.
Change-Id: I3f9ea541de4dc742dd64389d6c5f543fb1c4f052
Diffstat (limited to 'vp9')
| -rw-r--r-- | vp9/decoder/vp9_detokenize.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/vp9/decoder/vp9_detokenize.c b/vp9/decoder/vp9_detokenize.c index 577874882..421229a28 100644 --- a/vp9/decoder/vp9_detokenize.c +++ b/vp9/decoder/vp9_detokenize.c @@ -190,7 +190,11 @@ static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd, PLANE_TYPE type, } } v = (val * dqv) >> dq_shift; +#if CONFIG_COEFFICIENT_RANGE_CHECKING + dqcoeff[scan[c]] = check_range(vp9_read_bit(r) ? -v : v); +#else dqcoeff[scan[c]] = vp9_read_bit(r) ? -v : v; +#endif token_cache[scan[c]] = vp9_pt_energy_class[token]; ++c; ctx = get_coef_context(nb, token_cache, c); |