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avcodec/ffwavesynth: use uint32_t to compute difference, it is enough

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Fixes: signed integer overflow: 6494225984479297536 - -6043795377581187040 cannot be represented in type 'long'
Fixes: 15285/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFWAVESYNTH_fuzzer-5632780307791872

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 2019-06-21 22:43:23 +02:00
parent 8c02209935
commit e9dd3c7126
1 changed files with 1 additions and 1 deletions
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libavcodec/ffwavesynth.c
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@ -215,7 +215,7 @@ static void wavesynth_seek(struct wavesynth_context *ws, int64_t ts)
ws->next_inter = i;
ws->next_ts = i < ws->nb_inter ? ws->inter[i].ts_start : INF_TS;
*last = -1;
lcg_seek(&ws->dither_state, ts - ws->cur_ts);
lcg_seek(&ws->dither_state, (uint32_t)ts - ws->cur_ts);
if (ws->pink_need) {
int64_t pink_ts_cur = (ws->cur_ts + PINK_UNIT - 1) & ~(PINK_UNIT - 1);
int64_t pink_ts_next = ts & ~(PINK_UNIT - 1);