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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-06-28 20:38:56 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-07-08 09:53:24 +0200 |
| commit | 936ca7f1012ebb52233cc0a5acad3febfdbe9ec3 (patch) | |
| tree | 5740e6de6b3c009758b5ae9a18ad402af38d26e4 | |
| parent | e69106e70c89ed4864f504891d28886df6b15441 (diff) | |
avcodec/sanm: Optimize fill_frame() with av_memcpy_backptr()
Fixes: Timeout (76 sec -> 24 sec)
Fixes: 15043/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SANM_fuzzer-5699856238116864
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/sanm.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavcodec/sanm.c b/libavcodec/sanm.c index 811fd2188e..25aee7220f 100644 --- a/libavcodec/sanm.c +++ b/libavcodec/sanm.c @@ -1358,8 +1358,10 @@ static int read_frame_header(SANMVideoContext *ctx, SANMFrameHeader *hdr) static void fill_frame(uint16_t *pbuf, int buf_size, uint16_t color) { - while (buf_size--) + if (buf_size--) { *pbuf++ = color; + av_memcpy_backptr((uint8_t*)pbuf, 2, 2*buf_size); + } } static int copy_output(SANMVideoContext *ctx, SANMFrameHeader *hdr) |