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avcodec/tscc2: Skip duplicate frames

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This turns CFR duplicated frames into skiped frames

Fixes: Timeout
Fixes: 1719/clusterfuzz-testcase-minimized-6375090079924224

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-21 15:34:21 +02:00
parent ea71a48c7e
commit 4dc3714c48
2 changed files with 5 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
libavcodec/tscc2.c
View File

@ -235,16 +235,13 @@ static int tscc2_decode_frame(AVCodecContext *avctx, void *data,
return AVERROR_INVALIDDATA;
}
if ((ret = ff_reget_buffer(avctx, c->pic)) < 0) {
return ret;
if (frame_type == 0) {
// Skip duplicate frames
return buf_size;
}
if (frame_type == 0) {
*got_frame = 1;
if ((ret = av_frame_ref(data, c->pic)) < 0)
return ret;
return buf_size;
if ((ret = ff_reget_buffer(avctx, c->pic)) < 0) {
return ret;
}
if (bytestream2_get_bytes_left(&gb) < 4) {

8
tests/ref/fate/tscc2-avi
View File

@ -5,33 +5,25 @@
#sar 0: 0/1
0, 0, 0, 1, 230400, 0x7a2103c0
0, 1, 1, 1, 230400, 0xd381c279
0, 2, 2, 1, 230400, 0xd381c279
0, 3, 3, 1, 230400, 0x110aec27
0, 4, 4, 1, 230400, 0x4be67ee7
0, 5, 5, 1, 230400, 0xd87fe4b4
0, 6, 6, 1, 230400, 0xd87fe4b4
0, 7, 7, 1, 230400, 0x9bc6a398
0, 8, 8, 1, 230400, 0xd67d92db
0, 9, 9, 1, 230400, 0x3df6559e
0, 10, 10, 1, 230400, 0x3df6559e
0, 11, 11, 1, 230400, 0x2136ff25
0, 12, 12, 1, 230400, 0x94573fe6
0, 13, 13, 1, 230400, 0xbf67d3f5
0, 14, 14, 1, 230400, 0xbf67d3f5
0, 15, 15, 1, 230400, 0x2592b5cf
0, 16, 16, 1, 230400, 0x5b23cd93
0, 17, 17, 1, 230400, 0x9b76d079
0, 18, 18, 1, 230400, 0x9b76d079
0, 19, 19, 1, 230400, 0x771a017e
0, 20, 20, 1, 230400, 0xacfee1d0
0, 21, 21, 1, 230400, 0x6b9ff4eb
0, 22, 22, 1, 230400, 0x6b9ff4eb
0, 23, 23, 1, 230400, 0xbaf643e1
0, 24, 24, 1, 230400, 0x052efe59
0, 25, 25, 1, 230400, 0xd751f901
0, 26, 26, 1, 230400, 0xd751f901
0, 27, 27, 1, 230400, 0x6f94e11f
0, 28, 28, 1, 230400, 0x17eeabb9
0, 29, 29, 1, 230400, 0x3733a035
0, 30, 30, 1, 230400, 0x3733a035
0, 31, 31, 1, 230400, 0xb0829f45