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indeo: Check allocated tile size in ff_ivi_process_empty_tile()

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This prevents writing into a too small array if some parameters changed
without the tile being reallocated.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-04-15 14:16:55 +02:00
parent 5ad7335eba
commit f0bf9e9c2a
1 changed files with 6 additions and 0 deletions
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6
libavcodec/ivi_common.c
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@ -486,6 +486,12 @@ void ff_ivi_process_empty_tile(AVCodecContext *avctx, IVIBandDesc *band,
void (*mc_no_delta_func)(int16_t *buf, const int16_t *ref_buf, uint32_t pitch,
int mc_type);
if( tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size) ){
av_log(avctx, AV_LOG_ERROR, "allocated tile size %d mismatches parameters %d in ff_ivi_process_empty_tile()\n",
tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size));
return;
}
offs = tile->ypos * band->pitch + tile->xpos;
mb = tile->mbs;
ref_mb = tile->ref_mbs;