Make sure that dv encoder initializes all encoded packet data.

The specification does not say which value to use for unused
parts, so fill all unused bytes with 0xff, which is consistent
with what DV usually uses for reserved or unused parts.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@20084 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/dv.c

@@ -1102,8 +1102,17 @@ static int dv_encode_video_segment(AVCodecContext *avctx, void *arg)
             av_log(NULL, AV_LOG_ERROR, "ac bitstream overflow\n");
     }
 
-    for (j=0; j<5*s->sys->bpm; j++)
+    for (j=0; j<5*s->sys->bpm; j++) {
+       int pos;
+       int size = pbs[j].size_in_bits >> 3;
        flush_put_bits(&pbs[j]);
+       pos = put_bits_count(&pbs[j]) >> 3;
+       if (pos > size) {
+           av_log(avctx, AV_LOG_ERROR, "bitstream written beyond buffer size\n");
+           return -1;
+       }
+       memset(pbs[j].buf + pos, 0xff, size - pos);
+    }
 
     return 0;
 }

tests/lavf.regression.ref

@@ -30,7 +30,7 @@ b3174e2db508564c1cce0b5e3c1bc1bd *./tests/data/b-lavf.mxf_d10
 c145305a775eb2de43cdf94eb1ab5240 *./tests/data/b-lavf.mov
 357669 ./tests/data/b-lavf.mov
 ./tests/data/b-lavf.mov CRC=0x2f6a9b26
-31f115e7106265a7a7cea7f4fcf5c329 *./tests/data/b-lavf.dv
+522e5e5a46b99f8ad8aabdaf3d2f1869 *./tests/data/b-lavf.dv
 3600000 ./tests/data/b-lavf.dv
 ./tests/data/b-lavf.dv CRC=0x02c0af30
 bf5c730bb8426dbcfc5420e71ee490f2 *./tests/data/b-lavf.gxf

tests/rotozoom.regression.ref

@@ -150,15 +150,15 @@ a8fccf278bbb17d37a756ecf11672b09 *./tests/data/a-snow53.avi
 2721758 ./tests/data/a-snow53.avi
 dde5895817ad9d219f79a52d0bdfb001 *./tests/data/snowll.rotozoom.out.yuv
 stddev:    0.00 PSNR:999.99 bytes:  7603200/  7603200
-02c85b9bebb23f147ef598da7bcbf736 *./tests/data/a-dv.dv
+bfa766f89bfeabc0ae1044f3954bed52 *./tests/data/a-dv.dv
 7200000 ./tests/data/a-dv.dv
 7ec62bd3350a6848364669e6e1e4b9cc *./tests/data/dv.rotozoom.out.yuv
 stddev:    1.71 PSNR: 43.46 bytes:  7603200/  7603200
-203e50e75a43fb1b26e1b53d99e1de4f *./tests/data/a-dv411.dv
+00a9d8683ac6826af41bcf7223fb0389 *./tests/data/a-dv411.dv
 7200000 ./tests/data/a-dv411.dv
 7f9fa421028aabb11eaf4c6513a5a843 *./tests/data/dv.rotozoom.out.yuv
 stddev:   10.09 PSNR: 28.04 bytes:  7603200/  7603200
-2bae05531a24cd6764eefba64db345bc *./tests/data/a-dv50.dv
+61e31c79e8949b25c849753a0785b0d7 *./tests/data/a-dv50.dv
 14400000 ./tests/data/a-dv50.dv
 af3f2dd5ab62c1a1d98b07d4aeb6852f *./tests/data/dv50.rotozoom.out.yuv
 stddev:    0.82 PSNR: 49.81 bytes:  7603200/  7603200

tests/vsynth.regression.ref

@@ -150,15 +150,15 @@ stddev:   22.77 PSNR: 20.97 bytes:  7603200/  7603200
 3419980 ./tests/data/a-snow53.avi
 c5ccac874dbf808e9088bc3107860042 *./tests/data/snowll.vsynth.out.yuv
 stddev:    0.00 PSNR:999.99 bytes:  7603200/  7603200
-1482a23e323277f1ff67a29dd07b158d *./tests/data/a-dv.dv
+27ade3031b17214cf81c19cbf70f37d7 *./tests/data/a-dv.dv
 7200000 ./tests/data/a-dv.dv
 02ac7cdeab91d4d5621e7ce96dddc498 *./tests/data/dv.vsynth.out.yuv
 stddev:    6.90 PSNR: 31.33 bytes:  7603200/  7603200
-ec643f879ccc4d53d285712ec25b5d32 *./tests/data/a-dv411.dv
+bd67f2431db160d4bb6dcd791cea6efd *./tests/data/a-dv411.dv
 7200000 ./tests/data/a-dv411.dv
 b6640a3a572353f51284acb746eb00c4 *./tests/data/dv.vsynth.out.yuv
 stddev:   30.76 PSNR: 18.36 bytes:  7603200/  7603200
-2a0eace8da46f0061493677deb1fd66d *./tests/data/a-dv50.dv
+26dba84f0ea895b914ef5b333d8394ac *./tests/data/a-dv50.dv
 14400000 ./tests/data/a-dv50.dv
 a2ff093e93ffed10f730fa21df02fc50 *./tests/data/dv50.vsynth.out.yuv
 stddev:    1.72 PSNR: 43.37 bytes:  7603200/  7603200