[FFmpeg-cvslog] tqi: Pass errors from the MB decoder

[Michael Niedermayer]

ffmpeg | branch: release/0.8 | Michael Niedermayer <michaelni at gmx.at> | Mon Dec 19 04:13:37 2011 +0100| [2f2fd8c6d1c51a6b817e6c0bc4eff308b8f9cd18] | committer: Reinhard Tartler

tqi: Pass errors from the MB decoder

This silences some valgrind warnings.
CC: libav-stable at libav.org

Fixes second half of http://ffmpeg.org/trac/ffmpeg/ticket/794
Bug found by: Oana Stratulat

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
Signed-off-by: Reinhard Tartler <siretart at tauware.de>
(cherry picked from commit f85334f58e1286287d0547a49fa9c93b40cbf48f)
(cherry picked from commit 90290a5150e84fb138ccde57657dc03830f08c1c)

Signed-off-by: Reinhard Tartler <siretart at tauware.de>
(cherry picked from commit 5872580e65aab026b77754eb184f97ba7cc6ea35)

Signed-off-by: Reinhard Tartler <siretart at tauware.de>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2f2fd8c6d1c51a6b817e6c0bc4eff308b8f9cd18
---

 libavcodec/eatqi.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/libavcodec/eatqi.c b/libavcodec/eatqi.c
index aa96437..6c56048 100644
--- a/libavcodec/eatqi.c
+++ b/libavcodec/eatqi.c
@@ -59,12 +59,15 @@ static av_cold int tqi_decode_init(AVCodecContext *avctx)
     return 0;
 }
 
-static void tqi_decode_mb(MpegEncContext *s, DCTELEM (*block)[64])
+static int tqi_decode_mb(MpegEncContext *s, DCTELEM (*block)[64])
 {
     int n;
     s->dsp.clear_blocks(block[0]);
     for (n=0; n<6; n++)
-        ff_mpeg1_decode_block_intra(s, block[n], n);
+        if (ff_mpeg1_decode_block_intra(s, block[n], n) < 0)
+            return -1;
+
+    return 0;
 }
 
 static inline void tqi_idct_put(TqiContext *t, DCTELEM (*block)[64])
@@ -136,7 +139,8 @@ static int tqi_decode_frame(AVCodecContext *avctx,
     for (s->mb_y=0; s->mb_y<(avctx->height+15)/16; s->mb_y++)
     for (s->mb_x=0; s->mb_x<(avctx->width+15)/16; s->mb_x++)
     {
-        tqi_decode_mb(s, t->block);
+        if (tqi_decode_mb(s, t->block) < 0)
+            break;
         tqi_idct_put(t, t->block);
     }