XMA hardware spoofing when using direct register access.
This works for recent games that don't use the XMA* methods. Upcoming CLs will add the XMA* method shims forthcoming.
This commit is contained in:
Ben Vanik
166
src/xenia/kernel/xboxkrnl_audio_xma.cc
Normal file
166
src/xenia/kernel/xboxkrnl_audio_xma.cc
Normal file
@@ -0,0 +1,166 @@
|
||||
/**
|
||||
******************************************************************************
|
||||
* Xenia : Xbox 360 Emulator Research Project *
|
||||
******************************************************************************
|
||||
* Copyright 2015 Ben Vanik. All rights reserved. *
|
||||
* Released under the BSD license - see LICENSE in the root for more details. *
|
||||
******************************************************************************
|
||||
*/
|
||||
|
||||
#include "xenia/apu/apu.h"
|
||||
#include "xenia/common.h"
|
||||
#include "xenia/emulator.h"
|
||||
#include "xenia/kernel/kernel_state.h"
|
||||
#include "xenia/kernel/util/shim_utils.h"
|
||||
#include "xenia/kernel/xboxkrnl_private.h"
|
||||
#include "xenia/xbox.h"
|
||||
|
||||
namespace xe {
|
||||
namespace kernel {
|
||||
|
||||
// See audio_system.cc for implementation details.
|
||||
//
|
||||
// XMA details:
|
||||
// https://devel.nuclex.org/external/svn/directx/trunk/include/xma2defs.h
|
||||
// https://github.com/gdawg/fsbext/blob/master/src/xma_header.h
|
||||
//
|
||||
// XMA is undocumented, but the methods are pretty simple.
|
||||
// Games do this sequence to decode (now):
|
||||
// (not sure we are setting buffer validity/offsets right)
|
||||
// d> XMACreateContext(20656800)
|
||||
// d> XMAIsInputBuffer0Valid(000103E0)
|
||||
// d> XMAIsInputBuffer1Valid(000103E0)
|
||||
// d> XMADisableContext(000103E0, 0)
|
||||
// d> XMABlockWhileInUse(000103E0)
|
||||
// d> XMAInitializeContext(000103E0, 20008810)
|
||||
// d> XMASetOutputBufferValid(000103E0)
|
||||
// d> XMASetInputBuffer0Valid(000103E0)
|
||||
// d> XMAEnableContext(000103E0)
|
||||
// d> XMAGetOutputBufferWriteOffset(000103E0)
|
||||
// d> XMAGetOutputBufferReadOffset(000103E0)
|
||||
// d> XMAIsOutputBufferValid(000103E0)
|
||||
// d> XMAGetOutputBufferReadOffset(000103E0)
|
||||
// d> XMAGetOutputBufferWriteOffset(000103E0)
|
||||
// d> XMAIsInputBuffer0Valid(000103E0)
|
||||
// d> XMAIsInputBuffer1Valid(000103E0)
|
||||
// d> XMAIsInputBuffer0Valid(000103E0)
|
||||
// d> XMAIsInputBuffer1Valid(000103E0)
|
||||
// d> XMAReleaseContext(000103E0)
|
||||
//
|
||||
// XAudio2 uses XMA under the covers, and seems to map with the same
|
||||
// restrictions of frame/subframe/etc:
|
||||
// https://msdn.microsoft.com/en-us/library/windows/desktop/microsoft.directx_sdk.xaudio2.xaudio2_buffer(v=vs.85).aspx
|
||||
//
|
||||
//
|
||||
//static const uint32_t kBytesPerBlock = 2048;
|
||||
//static const uint32_t kSamplesPerFrame = 512;
|
||||
//static const uint32_t kSamplesPerSubframe = 128;
|
||||
//
|
||||
//// This is unused; just for documentation of reversing.
|
||||
//struct XMAContextType {
|
||||
// // DWORD 0
|
||||
// uint32_t input_buffer_0_block_count : 12; // XMASetInputBuffer0, number of
|
||||
// // 2KB blocks.
|
||||
// uint32_t loop_count : 8; // +12bit, XMASetLoopData
|
||||
// uint32_t input_buffer_0_valid : 1; // +20bit, XMAIsInputBuffer0Valid
|
||||
// uint32_t input_buffer_1_valid : 1; // +21bit, XMAIsInputBuffer1Valid
|
||||
// uint32_t output_buffer_block_count : 5; // +22bit
|
||||
// uint32_t
|
||||
// output_buffer_write_offset : 5; // +27bit, XMAGetOutputBufferWriteOffset
|
||||
//
|
||||
// // DWORD 1
|
||||
// uint32_t input_buffer_1_block_count : 12; // XMASetInputBuffer1, number of
|
||||
// // 2KB blocks.
|
||||
// uint32_t loop_subframe_end : 2; // +12bit, XMASetLoopData
|
||||
// uint32_t unk_dword_1_a : 3; // ?
|
||||
// uint32_t loop_subframe_skip : 3; // +17bit, XMASetLoopData
|
||||
// uint32_t subframe_decode_count : 4; // +20bit
|
||||
// uint32_t unk_dword_1_b : 3; // ?
|
||||
// uint32_t sample_rate : 2; // +27bit
|
||||
// uint32_t is_stereo : 1; // +29bit
|
||||
// uint32_t unk_dword_1_c : 1; // ?
|
||||
// uint32_t output_buffer_valid : 1; // +31bit, XMAIsOutputBufferValid
|
||||
//
|
||||
// // DWORD 2
|
||||
// uint32_t input_buffer_read_offset : 30; // XMAGetInputBufferReadOffset
|
||||
// uint32_t unk_dword_2 : 2; // ?
|
||||
//
|
||||
// // DWORD 3
|
||||
// uint32_t loop_start : 26; // XMASetLoopData
|
||||
// uint32_t unk_dword_3 : 6; // ?
|
||||
//
|
||||
// // DWORD 4
|
||||
// uint32_t loop_end : 26; // XMASetLoopData
|
||||
// uint32_t packet_metadata : 5; // XMAGetPacketMetadata
|
||||
// uint32_t current_buffer : 1; // ?
|
||||
//
|
||||
// // DWORD 5
|
||||
// uint32_t input_buffer_0_ptr; // top bits lopped off?
|
||||
// // DWORD 6
|
||||
// uint32_t input_buffer_1_ptr; // top bits lopped off?
|
||||
// // DWORD 7
|
||||
// uint32_t output_buffer_ptr; // top bits lopped off?
|
||||
// // DWORD 8
|
||||
// uint32_t unk_dword_8; // Some kind of pointer like output_buffer_ptr
|
||||
//
|
||||
// // DWORD 9
|
||||
// uint32_t
|
||||
// output_buffer_read_offset : 5; // +0bit, XMAGetOutputBufferReadOffset
|
||||
// uint32_t unk_dword_9 : 27;
|
||||
//};
|
||||
|
||||
SHIM_CALL XMACreateContext_shim(PPCContext* ppc_state, KernelState* state) {
|
||||
uint32_t context_out_ptr = SHIM_GET_ARG_32(0);
|
||||
|
||||
XELOGD("XMACreateContext(%.8X)", context_out_ptr);
|
||||
|
||||
auto audio_system = state->emulator()->audio_system();
|
||||
uint32_t context_ptr = audio_system->AllocateXmaContext();
|
||||
SHIM_SET_MEM_32(context_out_ptr, context_ptr);
|
||||
if (!context_ptr) {
|
||||
SHIM_SET_RETURN_32(X_STATUS_NO_MEMORY);
|
||||
return;
|
||||
}
|
||||
|
||||
SHIM_SET_RETURN_32(X_STATUS_SUCCESS);
|
||||
}
|
||||
|
||||
SHIM_CALL XMAReleaseContext_shim(PPCContext* ppc_state, KernelState* state) {
|
||||
uint32_t context_ptr = SHIM_GET_ARG_32(0);
|
||||
|
||||
XELOGD("XMAReleaseContext(%.8X)", context_ptr);
|
||||
|
||||
auto audio_system = state->emulator()->audio_system();
|
||||
audio_system->ReleaseXmaContext(context_ptr);
|
||||
|
||||
SHIM_SET_RETURN_32(0);
|
||||
}
|
||||
|
||||
} // namespace kernel
|
||||
} // namespace xe
|
||||
|
||||
void xe::kernel::xboxkrnl::RegisterAudioXmaExports(ExportResolver* export_resolver,
|
||||
KernelState* state) {
|
||||
SHIM_SET_MAPPING("xboxkrnl.exe", XMACreateContext, state);
|
||||
SHIM_SET_MAPPING("xboxkrnl.exe", XMAReleaseContext, state);
|
||||
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMAInitializeContext, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMASetLoopData, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMAGetInputBufferReadOffset, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMASetInputBufferReadOffset, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMASetInputBuffer0, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMAIsInputBuffer0Valid, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMASetInputBuffer0Valid, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMASetInputBuffer1, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMAIsInputBuffer1Valid, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMASetInputBuffer1Valid, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMAIsOutputBufferValid, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMASetOutputBufferValid, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMASetOutputBufferReadOffset, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMAGetOutputBufferReadOffset, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMAGetOutputBufferWriteOffset, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMAGetPacketMetadata, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMAEnableContext, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMADisableContext, state);
|
||||
//SHIM_SET_MAPPING("xboxkrnl.exe", XMABlockWhileInUse, state);
|
||||
}
|
||||
Reference in New Issue
Block a user