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avcodec/ffv1dec: Fix >8bps error concealment

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Fixes: 03_cave_girls_h264_slc24_slicecrc1_fuzzed.avi

Found-by: Dinah Handel <dinahrhandel@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-09-25 16:44:46 +02:00
parent b2955b6c5a
commit 25df7b1c35
1 changed files with 4 additions and 2 deletions
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6
libavcodec/ffv1dec.c
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@ -979,16 +979,18 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPac
FFV1Context *fs = f->slice_context[i];
int j;
if (fs->slice_damaged && f->last_picture.f->data[0]) {
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
const uint8_t *src[4];
uint8_t *dst[4];
ff_thread_await_progress(&f->last_picture, INT_MAX, 0);
for (j = 0; j < 4; j++) {
int pixshift = desc->comp[j].depth > 8;
int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;
int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;
dst[j] = p->data[j] + p->linesize[j] *
(fs->slice_y >> sv) + (fs->slice_x >> sh);
(fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
src[j] = f->last_picture.f->data[j] + f->last_picture.f->linesize[j] *
(fs->slice_y >> sv) + (fs->slice_x >> sh);
(fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
}
av_image_copy(dst, p->linesize, src,
f->last_picture.f->linesize,