Fixes: negation of -9223372036854775808 cannot be represented in type 'int64_t' (aka 'long'); cast to an unsigned type to negate this value to itself
Fixes: 15289/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFWAVESYNTH_fuzzer-5709034499342336
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
return *s;
}
-static void lcg_seek(uint32_t *s, int64_t dt)
+static void lcg_seek(uint32_t *s, uint32_t dt)
{
uint32_t a, c, t = *s;
- if (dt >= 0) {
- a = LCG_A;
- c = LCG_C;
- } else { /* coefficients for a step backward */
- a = LCG_AI;
- c = (uint32_t)(-LCG_AI * LCG_C);
- dt = -dt;
- }
+ a = LCG_A;
+ c = LCG_C;
while (dt) {
if (dt & 1)
t = a * t + c;