[Assertion] segment_offset != 0

[Triticum0]

Title Information

• Titles: Dead Man's Hand (49470027), Top Spin(4d530035), Dave-Mirra-Freestyle-BMX-2(41430001)
• https://xemu.app/titles/4d4a0009/#Advent-Rising
• https://xemu.app/titles/49470027/#Dead-Man-s-Hand
• https://xemu.app/titles/4d530035/#Top-Spin
• https://xemu.app/titles/41430001#Dave-Mirra-Freestyle-BMX-2
• https://xemu.app/titles/47560004/#Land-of-the-Dead-Road-to-Fiddler-s-Green
• https://xemu.app/titles/56550019/#Men-of-Valor
• https://xemu.app/titles/5553005e/#Tom-Clancy-s-Splinter-Cell-Double-Agent
• https://xemu.app/titles/4156000f/#Star-Wars-Obi-Wan
• https://xemu.app/titles/54510022/#Full-Spectrum-Warrior
• https://xemu.app/titles/4d53006d/#Jade-Empire
• https://xemu.app/titles/49470024/#Unreal-Championship
• https://xemu.app/titles/4c410003/#Star-Wars-Knights-of-the-Old-Republic
• https://xemu.app/titles/49470025/#Shadow-Ops-Red-Mercury
• https://xemu.app/titles/4d530064/#Halo-2
• https://xemu.app/titles/47560003/#Combat-Task-Force-121

Bug Description

The games crash early in-game with this assertion:
https://github.com/mborgerson/xemu/blob/7cde5a222cd77864b3bea5424970f6e86c85c28d/hw/xbox/mcpx/apu.c#L1885

Steps to reproduce this issue:

1. Insert disk
2. start the main mode from the main menu
3. The game crashes

Expected Behavior

Should make not crashes in-game.

Version

• Version: 0.5.0-4-gaab63105fc
• Last-known Working: Unknown

System Information

Field	Value
OS	Windows
CPU	AMD Ryzen 7 2700X Eight-Core Processor
Graphics Device	GeForce GTX 1080/PCIe/SSE2
Graphics Driver	3.3.0 NVIDIA 457.51

Additional Context

[Fabxx]

Reporting title with same issue: https://xemu.app/titles/5553005e/#Tom-Clancy-s-Splinter-Cell-Double-Agent

ERROR:../hw/xbox/mcpx/apu.c:1885:voice_get_samples: assertion failed: (segment_offset != 0)

[Fabxx]

Adding a log from gdb with the error specifications:
assertion.txt

[Fabxx]

@Triticum0 i've been able to fix the crash in double agent by doing the following reported here, restoring the EEPROM gets rid of the segment offset error: https://github.com/mborgerson/xemu/issues/869

[SonOfKorriban]

Same problem with Star Wars: Obi-Wan

[alexbainter]

I was able to get around this for Star Wars: Obi-Wan using xemu v0.7.119 by enabling Real-time DSP processing (Settings > Audio > Quality > Real-time DSP processing) as suggested by #1076, and I didn't notice any of the audio distortion mentioned in that issue.

[acordier16]

I had the same issue (also same AssertionError as #1687) on Star Wars: KOTOR, which was happening at random and had the nasty effect of corrupting game saves.

I decided to go on and build the current master version of Xemu with this fix (which is more of a workaround really):

if (segment_offset == 0) {
    DPRINTF("Error: segment_offset is zero, aborting processing for voice", v);
    return -1;
}

This works and "fixes" the issue. I clearly do not have a deep understanding of the APU chip in the original Xbox, so this does not solve anything, but instead allows a voice to be dropped (instead of throwing an Error and crashing) in case there is a memory issue.

The issue could be either be

1. A bad understanding of the memory logic for the voice processing. This would be a bit weird (albeit not impossible), since it would probably impact a lot of other games, which does not seem to be the case.
2. A race condition where multiples threads try to access the same resource in the APU. This would make more sense and would be my bet, as some other users do not seem to encounter the problem (maybe because of a different CPU, or OS version ? I don't know for sure). A solution could be to slow down the access, or at least to check that the memory isn't being accessed.

[retrobrahhh]

I played Obi-Wan and I get this problem on my 6 core laptop ryzen 5 4600H with GTX 1650 graphics card 16GB RAM but I don't get this problem on my 8 core x5700 amd 6700xt 32GB RAM desktop.

[TGP482]

I think Splinter Cell Chaos Theory can be removed I went through the whole game without seeing this