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avcodec/ffwavesynth: use uint32_t to compute difference, it is enough
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> (cherry picked from commit e9dd3c7126097d7c8d4f137db9957b81a219aa2c) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -215,7 +215,7 @@ static void wavesynth_seek(struct wavesynth_context *ws, int64_t ts)
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ws->next_inter = i;
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ws->next_ts = i < ws->nb_inter ? ws->inter[i].ts_start : INF_TS;
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*last = -1;
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lcg_seek(&ws->dither_state, ts - ws->cur_ts);
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lcg_seek(&ws->dither_state, (uint32_t)ts - ws->cur_ts);
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if (ws->pink_need) {
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int64_t pink_ts_cur = (ws->cur_ts + PINK_UNIT - 1) & ~(PINK_UNIT - 1);
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int64_t pink_ts_next = ts & ~(PINK_UNIT - 1);
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