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Thoroughly check all fields set by the application in xvmc struct. 

Originally committed as revision 17387 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ivan Kalvachev 2009-02-16 22:46:30 +00:00
parent 7846418bdb
commit 649c171aec
1 changed files with 5 additions and 1 deletions
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6
libavcodec/mpegvideo_xvmc.c
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@ -90,7 +90,11 @@ int ff_xvmc_field_start(MpegEncContext *s, AVCodecContext *avctx)
return -1;
}
if (render->allocated_mv_blocks < 1 ||
render->allocated_data_blocks < mb_block_count) {
render->allocated_data_blocks < render->allocated_mv_blocks*mb_block_count ||
render->start_mv_blocks_num >= render->allocated_mv_blocks ||
render->next_free_data_block_num >
render->allocated_data_blocks -
mb_block_count*(render->allocated_mv_blocks-render->start_mv_blocks_num)) {
av_log(avctx, AV_LOG_ERROR,
"Rendering surface doesn't provide enough block structures to work with.\n");
return -1;