mirror of
https://github.com/libretro/scummvm.git
synced 2025-02-25 05:34:27 +00:00
0d63d2a7ad
The 16-bit DPCM decompressors in SSCI and Urban Runner use a 16-bit register to store sample data, without any special handling of overflow. As such, out-of-range samples simply wrap around, rather than getting clipped. It is not totally clear if the wrapping behaviour was intentionally exploited to handle extreme transients, but in any case, videos like GK2 5280.VMD that generate samples outside the signed 16-bit range cause a loud pop when using clipping, but play back correctly when wrapping.