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avcodec/flicvideo: Optimize and Simplify FLI_COPY in flic_decode_frame_24BPP() by using bytestream2_get_buffer()

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Fixes: Timeout (31sec  -> 22sec)
Fixes: 16217/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FLIC_fuzzer-5658084189405184

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Tomas Härdin <tjoppen@acc.umu.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit e301736862)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-08-12 21:17:05 +02:00
parent 3349be5745
commit 36019fc088
1 changed files with 1 additions and 8 deletions
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9
libavcodec/flicvideo.c
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@ -1024,14 +1024,7 @@ static int flic_decode_frame_24BPP(AVCodecContext *avctx,
for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
y_ptr += s->frame->linesize[0]) {
pixel_countdown = s->avctx->width;
pixel_ptr = 0;
while (pixel_countdown > 0) {
pixel = bytestream2_get_le24(&g2);
AV_WL24(&pixels[y_ptr + pixel_ptr], pixel);
pixel_ptr += 3;
pixel_countdown--;
}
bytestream2_get_buffer(&g2, pixels + y_ptr, 3*s->avctx->width);
if (s->avctx->width & 1)
bytestream2_skip(&g2, 3);
}