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Merge pull request #396 from LukeUsher/AvQueryAvCapabilities 

Implement AvQueryAvCapabilities
This commit is contained in:
Luke Usher 2017-04-24 19:24:39 +01:00 committed by GitHub
parent 60c7c9ca22 cff5b19706
commit 0b09fe3d22
1 changed files with 35 additions and 11 deletions
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46
src/CxbxKrnl/EmuKrnlAv.cpp
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@ -61,17 +61,41 @@ PVOID g_pPersistedData = NULL;
ULONG AvQueryAvCapabilities()
{
// This is the only AV mode we currently emulate, so we can hardcode the return value
// TODO: Once we allow the user to configure the connected AV pack, we should implement this proper
// This function should first query the AV Pack type, read the user's EEPROM settings and
// return the correct flags based on this.
//
// For the AV Pack, read SMC_COMMAND_VIDEO_MODE (or HalBootSMCVideoMode) and convert it to a AV_PACK_*
//
// To read the EEPROM, call ExQueryNonVolatileSetting() with these config flags :
// XC_FACTORY_AV_REGION; if that fails, fallback on AV_STANDARD_NTSC_M | AV_FLAGS_60Hz
// XC_VIDEO_FLAGS; if that fails, fallback on 0
return AV_PACK_HDTV | AV_STANDARD_NTSC_M | AV_FLAGS_60Hz;
ULONG Type;
ULONG Result;
ULONG ResultLength;
// TODO: For the AV Pack, read SMC_COMMAND_VIDEO_MODE (or HalBootSMCVideoMode) and convert it to a AV_PACK_*
ULONG Capabilities = AV_PACK_HDTV;
// Read the AV Region
NTSTATUS status = xboxkrnl::ExQueryNonVolatileSetting(
xboxkrnl::XC_FACTORY_AV_REGION,
&Type,
&Result,
sizeof(Result),
&ResultLength);
// If the value was not set, default to NTSC
if (status != STATUS_SUCCESS || ResultLength != sizeof(Result)) {
Result = AV_STANDARD_NTSC_M | AV_FLAGS_60Hz;
}
Capabilities |= Result & (AV_STANDARD_MASK | AV_REFRESH_MASK);
// Read the User's configuration (Set in the Dashboard)
status = xboxkrnl::ExQueryNonVolatileSetting(xboxkrnl::XC_VIDEO,
&Type,
&Result,
sizeof(Result),
&ResultLength);
// If no result, default to no options selected
if (status != STATUS_SUCCESS || ResultLength != sizeof(Result)) {
Result = 0;
}
return Capabilities | Result & ~(AV_STANDARD_MASK | AV_PACK_MASK);
}
// Xbox code will set this address via AvSetSavedDataAddress