[FFmpeg-cvslog] roqvideodec: check dimensions validity

[Michael Niedermayer]

ffmpeg | branch: release/1.0 | Michael Niedermayer <michaelni at gmx.at> | Thu Nov 29 15:18:17 2012 +0100| [38e8f78c041bd28f5b8d32f2fd945eae8ce28598] | committer: Michael Niedermayer

roqvideodec: check dimensions validity

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit 3ae610451170cd5a28b33950006ff0bd23036845)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=38e8f78c041bd28f5b8d32f2fd945eae8ce28598
---

 libavcodec/roqvideodec.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavcodec/roqvideodec.c b/libavcodec/roqvideodec.c
index b4cf454..229022b 100644
--- a/libavcodec/roqvideodec.c
+++ b/libavcodec/roqvideodec.c
@@ -169,6 +169,12 @@ static av_cold int roq_decode_init(AVCodecContext *avctx)
     RoqContext *s = avctx->priv_data;
 
     s->avctx = avctx;
+
+    if (avctx->width%16 || avctx->height%16) {
+         av_log_ask_for_sample(avctx, "dimensions not being a multiple of 16 are unsupported\n");
+         return AVERROR_PATCHWELCOME;
+    }
+
     s->width = avctx->width;
     s->height = avctx->height;
     avcodec_get_frame_defaults(&s->frames[0]);