r210enc: don't write uninitialized data

Also fix r210 fate decoding test.
Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/r210enc.c

@@ -39,6 +39,7 @@ static int encode_frame(AVCodecContext *avctx, uint8_t *buf,
     AVFrame *pic = data;
     int i, j;
     int aligned_width = FFALIGN(avctx->width, 64);
+    int pad = (aligned_width - avctx->width) * 4;
     uint8_t *src_line;
     uint8_t *dst = buf;
 
@@ -68,7 +69,8 @@ static int encode_frame(AVCodecContext *avctx, uint8_t *buf,
             else
                 bytestream_put_be32(&dst, pixel);
         }
-        dst += (aligned_width - avctx->width) * 4;
+        memset(dst, 0, pad);
+        dst += pad;
         src_line += pic->linesize[0];
     }
 

tests/codec-regression.sh

@@ -320,8 +320,8 @@ do_video_decoding "" "-pix_fmt yuv420p"
 fi
 
 if [ -n "$do_r210" ] ; then
-do_video_encoding r210.avi "-an -c:v r210 -pix_fmt rgb48le"
-do_video_decoding "" "-pix_fmt rgb48le"
+do_video_encoding r210.avi "-an -c:v r210"
+do_video_decoding "" "-pix_fmt yuv420p"
 fi
 
 if [ -n "$do_v210" ] ; then

tests/ref/vsynth1/r210

 604a34c9f9151891c2d63d2652b75329 *./tests/data/vsynth1/r210.avi
  22125260 ./tests/data/vsynth1/r210.avi
-1ac5ec3bbb6bfbdf1ce6316e48e5fd89 *./tests/data/r210.vsynth1.out.yuv
-stddev:   91.79 PSNR:  8.87 MAXDIFF:  254 bytes: 30412800/  7603200
+ecaafa9eec11b5e1453a63ed6d194eed *./tests/data/r210.vsynth1.out.yuv
+stddev:    3.23 PSNR: 37.94 MAXDIFF:   48 bytes:  7603200/  7603200

tests/ref/vsynth2/r210

 d7a6f298e6869a74c0988fc3b30d0351 *./tests/data/vsynth2/r210.avi
   22125260 ./tests/data/vsynth2/r210.avi
-3ca229927a09e3d7ecedc0b868c568b0 *./tests/data/r210.vsynth2.out.yuv
-stddev:   82.11 PSNR:  9.84 MAXDIFF:  230 bytes: 30412800/  7603200
+6ea4fcd93fc83defc8770e85b64b60bb *./tests/data/r210.vsynth2.out.yuv
+stddev:    0.70 PSNR: 51.12 MAXDIFF:   12 bytes:  7603200/  7603200