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| author | Hendrik Leppkes <h.leppkes@gmail.com> | 2012-04-29 16:33:41 +0000 |
|---|---|---|
| committer | Derek Buitenhuis <derek.buitenhuis@gmail.com> | 2012-05-01 21:14:18 -0400 |
| commit | 4b7fa553a90361da730dfffc92c4bb75a181897d (patch) | |
| tree | d90f0e746f2beb0c84bd0be9ae26f81d9cd1bd4f | |
| parent | ff80c68264fc90df3b97a817279f156afec5b964 (diff) | |
| download | ffmpeg-4b7fa553a90361da730dfffc92c4bb75a181897d.tar.gz | |
indeo3: fix motion vector validation
The index of the motion vector has to be checked before being
multiplied by 2 for the array index.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
| -rw-r--r-- | libavcodec/indeo3.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/indeo3.c b/libavcodec/indeo3.c index ed3535adc7..80839406c0 100644 --- a/libavcodec/indeo3.c +++ b/libavcodec/indeo3.c @@ -773,12 +773,12 @@ static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx, /* get motion vector index and setup the pointer to the mv set */ if (!ctx->need_resync) ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3]; - mv_idx = *(ctx->next_cell_data++) << 1; + mv_idx = *(ctx->next_cell_data++); if (mv_idx >= ctx->num_vectors) { av_log(avctx, AV_LOG_ERROR, "motion vector index out of range\n"); return AVERROR_INVALIDDATA; } - curr_cell.mv_ptr = &ctx->mc_vectors[mv_idx]; + curr_cell.mv_ptr = &ctx->mc_vectors[mv_idx << 1]; curr_cell.tree = 1; /* enter the VQ tree */ UPDATE_BITPOS(8); } else { /* VQ tree DATA code */ |